Articles | Volume 19, issue 9
https://doi.org/10.5194/cp-19-1847-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-19-1847-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Sep 2023
Research article |
| 25 Sep 2023
| 25 Sep 2023
Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa
Department of Earth Sciences,
University of Bergen, Bergen, 5007, Norway
SFF Centre for Early Sapiens Behaviour (SapienCE), University of
Bergen, Bergen, 5020, Norway
Bjerknes Centre for Climate Research, Bergen, 5007,
Norway
Anna Nele Meckler
Department of Earth Sciences,
University of Bergen, Bergen, 5007, Norway
SFF Centre for Early Sapiens Behaviour (SapienCE), University of
Bergen, Bergen, 5020, Norway
Bjerknes Centre for Climate Research, Bergen, 5007,
Norway
Stein-Erik Lauritzen
Department of Earth Sciences,
University of Bergen, Bergen, 5007, Norway
SFF Centre for Early Sapiens Behaviour (SapienCE), University of
Bergen, Bergen, 5020, Norway
Bjerknes Centre for Climate Research, Bergen, 5007,
Norway
Torill Brekken
Department of Earth Sciences,
University of Bergen, Bergen, 5007, Norway
Helen Aase Rokkan
Department of Earth Sciences,
University of Bergen, Bergen, 5007, Norway
Alvaro Fernandez
Andalusian Institute of Earth Sciences, University of Granada,
Granada, 18100, Spain
Yves Krüger
Department of Earth Sciences,
University of Bergen, Bergen, 5007, Norway
Jane Adigun
Department of Anthropology and Archaeology, University of South
Africa, Pretoria, 0002, South Africa
Stéphane Affolter
Department of Environmental Sciences, University of Basel, Basel,
4056, Switzerland
Markus Leuenberger
Climate and Environmental Physics Division, Physics Institute and
Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012,
Switzerland
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Michael Döring and Markus Christian Leuenberger
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We analyse Holocen temperatures reconstructed from gas-stable-isotope species measured on ancient air extracted from a Greenland ice core. Also, we compare two state of the art firn-models which are needed for the inversion of the gas-isotope data to paleo-temperature and provide detailed uncertainty estimations for the reconstructed temperature estimates. Finally, we compare our reconstructed temperatures to two recent reconstructions based on the same gas-isotope data as used here.
Christopher J. Hollis, Tom Dunkley Jones, Eleni Anagnostou, Peter K. Bijl, Marlow Julius Cramwinckel, Ying Cui, Gerald R. Dickens, Kirsty M. Edgar, Yvette Eley, David Evans, Gavin L. Foster, Joost Frieling, Gordon N. Inglis, Elizabeth M. Kennedy, Reinhard Kozdon, Vittoria Lauretano, Caroline H. Lear, Kate Littler, Lucas Lourens, A. Nele Meckler, B. David A. Naafs, Heiko Pälike, Richard D. Pancost, Paul N. Pearson, Ursula Röhl, Dana L. Royer, Ulrich Salzmann, Brian A. Schubert, Hannu Seebeck, Appy Sluijs, Robert P. Speijer, Peter Stassen, Jessica Tierney, Aradhna Tripati, Bridget Wade, Thomas Westerhold, Caitlyn Witkowski, James C. Zachos, Yi Ge Zhang, Matthew Huber, and Daniel J. Lunt
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atlaswill provide insights into the mechanisms that control past warm climate states.
Michael Döring and Markus C. Leuenberger
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We present a novel approach for ice-core-based temperature reconstructions, which is based on gas-isotope data measured on enclosed air bubbles in ice cores. The processes of air movement and enclosure are highly temperature dependent due to heat diffusion in and densification of the snow and ice. Our method inverts a model, which describes these processes, to desired temperature histories. This paper examines the performance of our novel approach on different synthetic isotope-data scenarios.
Ye Yuan, Ludwig Ries, Hannes Petermeier, Martin Steinbacher, Angel J. Gómez-Peláez, Markus C. Leuenberger, Marcus Schumacher, Thomas Trickl, Cedric Couret, Frank Meinhardt, and Annette Menzel
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This paper presents a novel statistical method, ADVS, for baseline selection of representative CO2 data at elevated mountain measurement stations. It provides insights on how data processing techniques are critical for measurements and data analyses. Compared with other statistical methods, our method appears to be a good option as a generalized approach with improved comparability, which is important for research on measurement site characteristics and comparisons between stations.
Malin M. Ziehmer, Kurt Nicolussi, Christian Schlüchter, and Markus Leuenberger
Biogeosciences, 15, 1047–1064, https://doi.org/10.5194/bg-15-1047-2018, https://doi.org/10.5194/bg-15-1047-2018, 2018
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Cellulose content (CC (%)) series from two high-Alpine species, Larix decidua Mill. (European larch, LADE) and Pinus cembra L. (Swiss stone pine, PICE) are investigated in modern wood samples and Holocene wood remains from the Early and mid-Holocene. Trends in modern and Holocene time series as well as climate–cellulose relationships for modern trees in the Alps show high potential for CC (%) to be established as novel supplementary proxy in dendroclimatology.
Tesfaye A. Berhanu, Sönke Szidat, Dominik Brunner, Ece Satar, Rüdiger Schanda, Peter Nyfeler, Michael Battaglia, Martin Steinbacher, Samuel Hammer, and Markus Leuenberger
Atmos. Chem. Phys., 17, 10753–10766, https://doi.org/10.5194/acp-17-10753-2017, https://doi.org/10.5194/acp-17-10753-2017, 2017
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Fossil fuel CO2 is the major contributor of anthropogenic CO2 in the atmosphere, and accurate quantification is essential to better understand the carbon cycle. Such accurate quantification can be conducted based on radiocarbon measurements. In this study, we present radiocarbon measurements from a tall tower site in Switzerland. From these measurements, we have observed seasonally varying fossil fuel CO2 contributions and a biospheric CO2 component that varies diurnally and seasonally.
Kathrin M. Keller, Sebastian Lienert, Anil Bozbiyik, Thomas F. Stocker, Olga V. Churakova (Sidorova), David C. Frank, Stefan Klesse, Charles D. Koven, Markus Leuenberger, William J. Riley, Matthias Saurer, Rolf Siegwolf, Rosemarie B. Weigt, and Fortunat Joos
Biogeosciences, 14, 2641–2673, https://doi.org/10.5194/bg-14-2641-2017, https://doi.org/10.5194/bg-14-2641-2017, 2017
Michael F. Schibig, Emmanuel Mahieu, Stephan Henne, Bernard Lejeune, and Markus C. Leuenberger
Atmos. Chem. Phys., 16, 9935–9949, https://doi.org/10.5194/acp-16-9935-2016, https://doi.org/10.5194/acp-16-9935-2016, 2016
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Two CO2 time series measured at the High Alpine Research Station Jungfraujoch, Switzerland (3580 m a.s.l.), in the period from 2005 to 2013 were compared. One data set was measured in situ whereas the other data set was measured in the column above Jungfraujoch. The trends of the column integrated and the in situ data set are in good agreement, the amplitude of the in situ data set is ca. two times the amplitude of the column integrated data set, because it is closer to the sources and sinks.
Tesfaye Ayalneh Berhanu, Ece Satar, Rudiger Schanda, Peter Nyfeler, Hanspeter Moret, Dominik Brunner, Brian Oney, and Markus Leuenberger
Atmos. Meas. Tech., 9, 2603–2614, https://doi.org/10.5194/amt-9-2603-2016, https://doi.org/10.5194/amt-9-2603-2016, 2016
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In this manuscript, we have presented Co, CO2 and CH4 measurement data from an old radio tower tower (217.5 m) at Beromunster, Switzerland. From about 2 years of continuous CO, CO2 and CH4 measurement at five different heights, we have determined a long-term reproducibility of 2.79 ppb, 0.05 ppm and 0.29 ppb for CO, CO2 and CH4, respectively, compliant with the GAW requirements. We have also observed seasonal and diurnal variation of these species.
Ece Satar, Tesfaye A. Berhanu, Dominik Brunner, Stephan Henne, and Markus Leuenberger
Biogeosciences, 13, 2623–2635, https://doi.org/10.5194/bg-13-2623-2016, https://doi.org/10.5194/bg-13-2623-2016, 2016
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Beromünster tall tower is the flagship of the densely placed Swiss greenhouse gas observation network (CarboCount CH). In this research article we report the first 2 years of the continuous greenhouse gas measurements using cavity ring down spectroscopy analyzer from this tall tower. We have adopted a purely observation based, multi-species and multi-level approach to characterize the site with respect to sources and sinks of natural and anthropogenic origin at diurnal to annual timescales.
Lucie Bazin, Amaelle Landais, Emilie Capron, Valérie Masson-Delmotte, Catherine Ritz, Ghislain Picard, Jean Jouzel, Marie Dumont, Markus Leuenberger, and Frédéric Prié
Clim. Past, 12, 729–748, https://doi.org/10.5194/cp-12-729-2016, https://doi.org/10.5194/cp-12-729-2016, 2016
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We present new measurements of δO2⁄N2 and δ18Oatm performed on well-conserved ice from EDC covering MIS5 and between 380 and 800 ka. The combination of the observation of a 100 ka periodicity in the new δO2⁄N2 record with a MIS5 multi-site multi-proxy study has revealed a potential influence of local climatic parameters on δO2⁄N2. Moreover, we propose that the varying delay between d18Oatm and precession for the last 800 ka is affected by the occurrence of ice sheet discharge events.
Stephan Henne, Dominik Brunner, Brian Oney, Markus Leuenberger, Werner Eugster, Ines Bamberger, Frank Meinhardt, Martin Steinbacher, and Lukas Emmenegger
Atmos. Chem. Phys., 16, 3683–3710, https://doi.org/10.5194/acp-16-3683-2016, https://doi.org/10.5194/acp-16-3683-2016, 2016
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Greenhouse gas emissions can be assessed by "top-down" methods that combine atmospheric observations, a transport model and a mathematical optimisation framework. Here, we apply such a top-down method to the methane emissions of Switzerland, utilising observations from the recently installed CarboCount-CH network. Our Swiss total emissions largely agree with those of the national "bottom-up" inventory, whereas regional differences suggest lower than reported emissions from manure handling.
M. C. Leuenberger, M. F. Schibig, and P. Nyfeler
Atmos. Meas. Tech., 8, 5289–5299, https://doi.org/10.5194/amt-8-5289-2015, https://doi.org/10.5194/amt-8-5289-2015, 2015
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Adsorption/desorption effects of trace gases in gas cylinders were investigated. Our measurements indicate a rather strong effect on steel cylinders for CO2 that becomes easily visible through enhanced concentrations for low (<20 bars) gas pressure. Much smaller effects are observed for CO and CH4. Significantly smaller effects are measured for all gas species investigated on aluminium cylinders. Careful selection of gas cylinders for high-precision calibration purposes is recommended.
T. Kobashi, T. Ikeda-Fukazawa, M. Suwa, J. Schwander, T. Kameda, J. Lundin, A. Hori, H. Motoyama, M. Döring, and M. Leuenberger
Atmos. Chem. Phys., 15, 13895–13914, https://doi.org/10.5194/acp-15-13895-2015, https://doi.org/10.5194/acp-15-13895-2015, 2015
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We find that argon/nitrogen ratios of trapped air in the GISP2 ice core on “gas ages” are significantly negatively correlated with accumulation rate changes over the past 6000 years. Lines of evidence indicate that changes in overloading pressure at bubble closeoff depths induced the gas fractionation in closed bubbles. Further understanding of the fractionation processes may lead to a new proxy for the past temperature and accumulation rate.
B. Oney, S. Henne, N. Gruber, M. Leuenberger, I. Bamberger, W. Eugster, and D. Brunner
Atmos. Chem. Phys., 15, 11147–11164, https://doi.org/10.5194/acp-15-11147-2015, https://doi.org/10.5194/acp-15-11147-2015, 2015
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We present a detailed analysis of a new greenhouse gas measurement network
in the Swiss Plateau, situated between the Jura mountains and the Alps. We
find the network's measurements to be information rich and suitable
for studying surface carbon fluxes of the study region. However, we are
limited by the high-resolution (2km) atmospheric transport model's ability
to simulate meteorology at the individual measurement stations, especially
at those situated in rough terrain.
M. S. Studer, R. T. W. Siegwolf, M. Leuenberger, and S. Abiven
Biogeosciences, 12, 1865–1879, https://doi.org/10.5194/bg-12-1865-2015, https://doi.org/10.5194/bg-12-1865-2015, 2015
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We present a new technique to label organic matter (OM) at its place of formation by the application of 13C, 18O and 2H through the gaseous phase. The label diffused into leaves was incorporated into assimilates and was detected in plant tissues. This technique can be applied in soil sciences, e.g. to trace the decomposition pathways of soil OM inputs, or in plant physiology and palaeoclimatic reconstruction, e.g. to further investigate the origin of the 18O and 2H signal in tree ring cellulose.
M. F. Schibig, M. Steinbacher, B. Buchmann, I. T. van der Laan-Luijkx, S. van der Laan, S. Ranjan, and M. C. Leuenberger
Atmos. Meas. Tech., 8, 57–68, https://doi.org/10.5194/amt-8-57-2015, https://doi.org/10.5194/amt-8-57-2015, 2015
M. C. Leuenberger, M. F. Schibig, and P. Nyfeler
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acpd-14-19293-2014, https://doi.org/10.5194/acpd-14-19293-2014, 2014
Revised manuscript not accepted
S. Affolter, D. Fleitmann, and M. Leuenberger
Clim. Past, 10, 1291–1304, https://doi.org/10.5194/cp-10-1291-2014, https://doi.org/10.5194/cp-10-1291-2014, 2014
I. Mariani, A. Eichler, T. M. Jenk, S. Brönnimann, R. Auchmann, M. C. Leuenberger, and M. Schwikowski
Clim. Past, 10, 1093–1108, https://doi.org/10.5194/cp-10-1093-2014, https://doi.org/10.5194/cp-10-1093-2014, 2014
P. Kindler, M. Guillevic, M. Baumgartner, J. Schwander, A. Landais, and M. Leuenberger
Clim. Past, 10, 887–902, https://doi.org/10.5194/cp-10-887-2014, https://doi.org/10.5194/cp-10-887-2014, 2014
M. Baumgartner, P. Kindler, O. Eicher, G. Floch, A. Schilt, J. Schwander, R. Spahni, E. Capron, J. Chappellaz, M. Leuenberger, H. Fischer, and T. F. Stocker
Clim. Past, 10, 903–920, https://doi.org/10.5194/cp-10-903-2014, https://doi.org/10.5194/cp-10-903-2014, 2014
Z. Kern, B. Kohán, and M. Leuenberger
Atmos. Chem. Phys., 14, 1897–1907, https://doi.org/10.5194/acp-14-1897-2014, https://doi.org/10.5194/acp-14-1897-2014, 2014
L. Bazin, A. Landais, B. Lemieux-Dudon, H. Toyé Mahamadou Kele, D. Veres, F. Parrenin, P. Martinerie, C. Ritz, E. Capron, V. Lipenkov, M.-F. Loutre, D. Raynaud, B. Vinther, A. Svensson, S. O. Rasmussen, M. Severi, T. Blunier, M. Leuenberger, H. Fischer, V. Masson-Delmotte, J. Chappellaz, and E. Wolff
Clim. Past, 9, 1715–1731, https://doi.org/10.5194/cp-9-1715-2013, https://doi.org/10.5194/cp-9-1715-2013, 2013
I. T. van der Laan-Luijkx, S. van der Laan, C. Uglietti, M. F. Schibig, R. E. M. Neubert, H. A. J. Meijer, W. A. Brand, A. Jordan, J. M. Richter, M. Rothe, and M. C. Leuenberger
Atmos. Meas. Tech., 6, 1805–1815, https://doi.org/10.5194/amt-6-1805-2013, https://doi.org/10.5194/amt-6-1805-2013, 2013
M. Guillevic, L. Bazin, A. Landais, P. Kindler, A. Orsi, V. Masson-Delmotte, T. Blunier, S. L. Buchardt, E. Capron, M. Leuenberger, P. Martinerie, F. Prié, and B. M. Vinther
Clim. Past, 9, 1029–1051, https://doi.org/10.5194/cp-9-1029-2013, https://doi.org/10.5194/cp-9-1029-2013, 2013
E. Capron, A. Landais, D. Buiron, A. Cauquoin, J. Chappellaz, M. Debret, J. Jouzel, M. Leuenberger, P. Martinerie, V. Masson-Delmotte, R. Mulvaney, F. Parrenin, and F. Prié
Clim. Past, 9, 983–999, https://doi.org/10.5194/cp-9-983-2013, https://doi.org/10.5194/cp-9-983-2013, 2013
Related subject area
Subject: Proxy Use-Development-Validation | Archive: Terrestrial Archives | Timescale: Pleistocene
The Indo–Pacific Pollen Database – a Neotoma constituent database
Can machine-learning algorithms improve upon classical palaeoenvironmental reconstruction models?
Quantitative reconstruction of past monsoon precipitation based on tetraether membrane lipids in Chinese loess
Distinguishing the combined vegetation and soil component of δ13C variation in speleothem records from subsequent degassing and prior calcite precipitation effects
Biomarker proxy records of Arctic climate change during the Mid-Pleistocene transition from Lake El'gygytgyn (Far East Russia)
Hydroclimatic variability of opposing Late Pleistocene climates in the Levant revealed by deep Dead Sea sediments
Different facets of dry–wet patterns in south-western China over the past 27 000 years
The triple oxygen isotope composition of phytoliths, a new proxy of atmospheric relative humidity: controls of soil water isotope composition, temperature, CO2 concentration and relative humidity
The speleothem oxygen record as a proxy for thermal or moisture changes: a case study of multiproxy records from MIS 5–MIS 6 speleothems from the Demänová Cave system
A new multivariable benchmark for Last Glacial Maximum climate simulations
The Last Glacial Maximum in the central North Island, New Zealand: palaeoclimate inferences from glacier modelling
Late-glacial to late-Holocene shifts in global precipitation δ18O
Climate history of the Southern Hemisphere Westerlies belt during the last glacial–interglacial transition revealed from lake water oxygen isotope reconstruction of Laguna Potrok Aike (52° S, Argentina)
New online method for water isotope analysis of speleothem fluid inclusions using laser absorption spectroscopy (WS-CRDS)
Inorganic geochemistry data from Lake El'gygytgyn sediments: marine isotope stages 6–11
A 350 ka record of climate change from Lake El'gygytgyn, Far East Russian Arctic: refining the pattern of climate modes by means of cluster analysis
Dynamic diatom response to changing climate 0–1.2 Ma at Lake El'gygytgyn, Far East Russian Arctic
Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn
Potential and limits of OSL, TT-OSL, IRSL and pIRIR290 dating methods applied on a Middle Pleistocene sediment record of Lake El'gygytgyn, Russia
Rock magnetic properties, magnetic susceptibility, and organic geochemistry comparison in core LZ1029-7 Lake El'gygytgyn, Russia Far East
High-temperature thermomagnetic properties of vivianite nodules, Lake El'gygytgyn, Northeast Russia
Reconstruction of drip-water δ18O based on calcite oxygen and clumped isotopes of speleothems from Bunker Cave (Germany)
A biomarker record of Lake El'gygytgyn, Far East Russian Arctic: investigating sources of organic matter and carbon cycling during marine isotope stages 1–3
Climate warming and vegetation response after Heinrich event 1 (16 700–16 000 cal yr BP) in Europe south of the Alps
A 250 ka oxygen isotope record from diatoms at Lake El'gygytgyn, far east Russian Arctic
The oxygen isotopic composition of phytolith assemblages from tropical rainforest soil tops (Queensland, Australia): validation of a new paleoenvironmental tool
Terrestrial mollusc records from Xifeng and Luochuan L9 loess strata and their implications for paleoclimatic evolution in the Chinese Loess Plateau during marine Oxygen Isotope Stages 24-22
Annika V. Herbert, Simon G. Haberle, Suzette G. A. Flantua, Ondrej Mottl, Jessica L. Blois, John W. Williams, Adrian George, and Geoff S. Hope
Clim. Past, 20, 2473–2485, https://doi.org/10.5194/cp-20-2473-2024, https://doi.org/10.5194/cp-20-2473-2024, 2024
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The Indo-Pacific Pollen Database is a large collection of pollen samples from across the Indo-Pacific region, with most samples coming from Australia. This is a valuable collection that can be used to analyse vegetation dynamics going back thousands of years. It is now being fully shared via Neotoma for the first time, opening up many exciting new avenues of research. This paper presents key aspects of this database, including geographical distribution, age control and deposition times.
Peng Sun, Philip B. Holden, and H. John B. Birks
Clim. Past, 20, 2373–2398, https://doi.org/10.5194/cp-20-2373-2024, https://doi.org/10.5194/cp-20-2373-2024, 2024
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We develop the Multi Ensemble Machine Learning Model (MEMLM) for reconstructing palaeoenvironments from microfossil assemblages. The machine-learning approaches, which include random tree and natural language processing techniques, substantially outperform classical approaches under cross-validation, but they can fail when applied to reconstruct past environments. Statistical significance testing is found sufficient to identify these unreliable reconstructions.
Jingjing Guo, Martin Ziegler, Louise Fuchs, Youbin Sun, and Francien Peterse
EGUsphere, https://doi.org/10.5194/egusphere-2024-1648, https://doi.org/10.5194/egusphere-2024-1648, 2024
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In this study, we use the distribution of soil bacterial membrane lipids stored on the Chinese Loess Plateau (CLP) to quantitatively reconstruct variations in precipitation amount over the past 130 kyr. The precipitation record shows orbital- and millennial-scale variations and varies at precession and obliquity scale. The application of this precipitation proxy across the CLP indicates a more pronounced spatial gradient during glacials, when the western CLP experiences more arid conditions.
Heather M. Stoll, Chris Day, Franziska Lechleitner, Oliver Kost, Laura Endres, Jakub Sliwinski, Carlos Pérez-Mejías, Hai Cheng, and Denis Scholz
Clim. Past, 19, 2423–2444, https://doi.org/10.5194/cp-19-2423-2023, https://doi.org/10.5194/cp-19-2423-2023, 2023
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Stalagmites formed in caves provide valuable information about past changes in climate and vegetation conditions. In this contribution, we present a new method to better estimate past changes in soil and vegetation productivity using carbon isotopes and trace elements measured in stalagmites. Applying this method to other stalagmites should provide a better indication of past vegetation feedbacks to climate change.
Kurt R. Lindberg, William C. Daniels, Isla S. Castañeda, and Julie Brigham-Grette
Clim. Past, 18, 559–577, https://doi.org/10.5194/cp-18-559-2022, https://doi.org/10.5194/cp-18-559-2022, 2022
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Earth experiences regular ice ages resulting in shifts between cooler and warmer climates. Around 1 million years ago, the ice age cycles grew longer and stronger. We used bacterial and plant lipids preserved in an Arctic lake to reconstruct temperature and vegetation during this climate transition. We find that Arctic land temperatures did not cool much compared to ocean records from this period, and that vegetation shifts correspond with a long-term drying previously reported in the region.
Yoav Ben Dor, Francesco Marra, Moshe Armon, Yehouda Enzel, Achim Brauer, Markus Julius Schwab, and Efrat Morin
Clim. Past, 17, 2653–2677, https://doi.org/10.5194/cp-17-2653-2021, https://doi.org/10.5194/cp-17-2653-2021, 2021
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Laminated sediments from the deepest part of the Dead Sea unravel the hydrological response of the eastern Mediterranean to past climate changes. This study demonstrates the importance of geological archives in complementing modern hydrological measurements that do not fully capture natural hydroclimatic variability, which is crucial to configure for understanding the impact of climate change on the hydrological cycle in subtropical regions.
Mengna Liao, Kai Li, Weiwei Sun, and Jian Ni
Clim. Past, 17, 2291–2303, https://doi.org/10.5194/cp-17-2291-2021, https://doi.org/10.5194/cp-17-2291-2021, 2021
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The long-term trajectories of precipitation, hydrological balance and soil moisture are not completely consistent in southwest China. Hydrological balance was more sensitive to temperature change on a millennial scale. For soil moisture, plant processes also played a big role in addition to precipitation and temperature. Under future climate warming, surface water shortage in southwest China can be even more serious and efforts at reforestation may bring some relief to the soil moisture deficit.
Clément Outrequin, Anne Alexandre, Christine Vallet-Coulomb, Clément Piel, Sébastien Devidal, Amaelle Landais, Martine Couapel, Jean-Charles Mazur, Christophe Peugeot, Monique Pierre, Frédéric Prié, Jacques Roy, Corinne Sonzogni, and Claudia Voigt
Clim. Past, 17, 1881–1902, https://doi.org/10.5194/cp-17-1881-2021, https://doi.org/10.5194/cp-17-1881-2021, 2021
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Continental atmospheric humidity is a key climate parameter poorly captured by global climate models. Model–data comparison approaches that are applicable beyond the instrumental period are essential to progress on this issue but face a lack of quantitative relative humidity proxies. Here, we calibrate the triple oxygen isotope composition of phytoliths as a new quantitative proxy of continental relative humidity suitable for past climate reconstructions.
Jacek Pawlak
Clim. Past, 17, 1051–1064, https://doi.org/10.5194/cp-17-1051-2021, https://doi.org/10.5194/cp-17-1051-2021, 2021
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Presently, central Europe is under the influence of two types of climate, transitional and continental. The 60 ka long multiproxy speleothem dataset from Slovakia records the climate of the Last Interglacial cycle and its transition to the Last Glacial. The interpretation of stable isotopic composition and trace element content proxies helps to distinguish which factor had the strongest influence on the δ18O record shape: the local temperature, the humidity or the source effect.
Sean F. Cleator, Sandy P. Harrison, Nancy K. Nichols, I. Colin Prentice, and Ian Roulstone
Clim. Past, 16, 699–712, https://doi.org/10.5194/cp-16-699-2020, https://doi.org/10.5194/cp-16-699-2020, 2020
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We present geographically explicit reconstructions of seasonal temperature and annual moisture variables at the Last Glacial Maximum (LGM), 21 000 years ago. The reconstructions use existing site-based estimates of climate, interpolated in space and time in a physically consistent way using climate model simulations. The reconstructions give a much better picture of the LGM climate and will provide a robust evaluation of how well state-of-the-art climate models simulate large climate changes.
Shaun R. Eaves, Andrew N. Mackintosh, Brian M. Anderson, Alice M. Doughty, Dougal B. Townsend, Chris E. Conway, Gisela Winckler, Joerg M. Schaefer, Graham S. Leonard, and Andrew T. Calvert
Clim. Past, 12, 943–960, https://doi.org/10.5194/cp-12-943-2016, https://doi.org/10.5194/cp-12-943-2016, 2016
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Geological evidence for past changes in glacier length provides a useful source of information about pre-historic climate change. We have used glacier modelling to show that air temperature reductions of −5 to −7 °C, relative to present, are required to simulate the glacial extent in the North Island, New Zealand, during the last ice age (approx. 20000 years ago). Our results provide data to assess climate model simulations, with the aim of determining the drivers of past natural climate change.
S. Jasechko, A. Lechler, F. S. R. Pausata, P. J. Fawcett, T. Gleeson, D. I. Cendón, J. Galewsky, A. N. LeGrande, C. Risi, Z. D. Sharp, J. M. Welker, M. Werner, and K. Yoshimura
Clim. Past, 11, 1375–1393, https://doi.org/10.5194/cp-11-1375-2015, https://doi.org/10.5194/cp-11-1375-2015, 2015
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In this study we compile global isotope proxy records of climate changes from the last ice age to the late-Holocene preserved in cave calcite, glacial ice and groundwater aquifers. We show that global patterns of late-Pleistocene to late-Holocene precipitation isotope shifts are consistent with stronger-than-modern isotopic distillation of air masses during the last ice age, likely impacted by larger global temperature differences between the tropics and the poles.
J. Zhu, A. Lücke, H. Wissel, C. Mayr, D. Enters, K. Ja Kim, C. Ohlendorf, F. Schäbitz, and B. Zolitschka
Clim. Past, 10, 2153–2169, https://doi.org/10.5194/cp-10-2153-2014, https://doi.org/10.5194/cp-10-2153-2014, 2014
S. Affolter, D. Fleitmann, and M. Leuenberger
Clim. Past, 10, 1291–1304, https://doi.org/10.5194/cp-10-1291-2014, https://doi.org/10.5194/cp-10-1291-2014, 2014
P. S. Minyuk, V. Y. Borkhodoev, and V. Wennrich
Clim. Past, 10, 467–485, https://doi.org/10.5194/cp-10-467-2014, https://doi.org/10.5194/cp-10-467-2014, 2014
U. Frank, N. R. Nowaczyk, P. Minyuk, H. Vogel, P. Rosén, and M. Melles
Clim. Past, 9, 1559–1569, https://doi.org/10.5194/cp-9-1559-2013, https://doi.org/10.5194/cp-9-1559-2013, 2013
J. A. Snyder, M. V. Cherepanova, and A. Bryan
Clim. Past, 9, 1309–1319, https://doi.org/10.5194/cp-9-1309-2013, https://doi.org/10.5194/cp-9-1309-2013, 2013
L. Cunningham, H. Vogel, V. Wennrich, O. Juschus, N. Nowaczyk, and P. Rosén
Clim. Past, 9, 679–686, https://doi.org/10.5194/cp-9-679-2013, https://doi.org/10.5194/cp-9-679-2013, 2013
A. Zander and A. Hilgers
Clim. Past, 9, 719–733, https://doi.org/10.5194/cp-9-719-2013, https://doi.org/10.5194/cp-9-719-2013, 2013
K. J. Murdock, K. Wilkie, and L. L. Brown
Clim. Past, 9, 467–479, https://doi.org/10.5194/cp-9-467-2013, https://doi.org/10.5194/cp-9-467-2013, 2013
P. S. Minyuk, T. V. Subbotnikova, L. L. Brown, and K. J. Murdock
Clim. Past, 9, 433–446, https://doi.org/10.5194/cp-9-433-2013, https://doi.org/10.5194/cp-9-433-2013, 2013
T. Kluge, H. P. Affek, T. Marx, W. Aeschbach-Hertig, D. F. C. Riechelmann, D. Scholz, S. Riechelmann, A. Immenhauser, D. K. Richter, J. Fohlmeister, A. Wackerbarth, A. Mangini, and C. Spötl
Clim. Past, 9, 377–391, https://doi.org/10.5194/cp-9-377-2013, https://doi.org/10.5194/cp-9-377-2013, 2013
A. R. Holland, S. T. Petsch, I. S. Castañeda, K. M. Wilkie, S. J. Burns, and J. Brigham-Grette
Clim. Past, 9, 243–260, https://doi.org/10.5194/cp-9-243-2013, https://doi.org/10.5194/cp-9-243-2013, 2013
S. Samartin, O. Heiri, A. F. Lotter, and W. Tinner
Clim. Past, 8, 1913–1927, https://doi.org/10.5194/cp-8-1913-2012, https://doi.org/10.5194/cp-8-1913-2012, 2012
B. Chapligin, H. Meyer, G. E. A. Swann, C. Meyer-Jacob, and H.-W. Hubberten
Clim. Past, 8, 1621–1636, https://doi.org/10.5194/cp-8-1621-2012, https://doi.org/10.5194/cp-8-1621-2012, 2012
A. Alexandre, J. Crespin, F. Sylvestre, C. Sonzogni, and D. W. Hilbert
Clim. Past, 8, 307–324, https://doi.org/10.5194/cp-8-307-2012, https://doi.org/10.5194/cp-8-307-2012, 2012
B. Wu and N. Q. Wu
Clim. Past, 7, 349–359, https://doi.org/10.5194/cp-7-349-2011, https://doi.org/10.5194/cp-7-349-2011, 2011
Cited articles
Adigun, J.: Investigating the archaeological implications of environmental
change during the Middle Stone Age: a contribution from the geochemical
analysis of speleothems in the southern Cape, South Africa, Faculty of Science,
University of the Witwatersrand, Johannesburg, https://wiredspace.wits.ac.za/handle/10539/21240 (last access: 21 August 2023), 2016.
Affek, H. P., Bar-Matthews, M., Ayalon, A., Matthews, A., and Eiler, J. M.:
Glacial/interglacial temperature variations in Soreq cave speleothems as
recorded by “clumped isotope” thermometry, Geochim. Cosmochim. Ac.,
72, 5351–5360, https://doi.org/10.1016/j.gca.2008.06.031, 2008.
Affolter, S., Fleitmann, D., and Leuenberger, M.: New online method for water isotope analysis of speleothem fluid inclusions using laser absorption spectroscopy (WS-CRDS), Clim. Past, 10, 1291–1304, https://doi.org/10.5194/cp-10-1291-2014, 2014.
Affolter, S., Häuselmann, A., Fleitmann, D., Edwards, R. L., Cheng, H.,
and Leuenberger, M.: Central Europe temperature constrained by speleothem
fluid inclusion water isotopes over the past 14 000 years, Sci. Adv.,
5, eaav3809, https://doi.org/10.1126/sciadv.aav3809, 2019.
Andersen, K. K., Azuma, N., Barnola, J. M., Bigler, M., Biscaye, P.,
Caillon, N., Chappellaz, J., Clausen, H. B., Dahl-Jensen, D., Fischer, H.,
Flückiger, J., Fritzsche, D., Fujii, Y., Goto-Azuma, K., Grønvold,
K., Gundestrup, N. S., Hansson, M., Huber, C., Hvidberg, C. S., Johnsen, S.
J., Jonsell, U., Jouzel, J., Kipfstuhl, S., Landais, A., Leuenberger, M.,
Lorrain, R., Masson-Delmotte, V., Miller, H., Motoyama, H., Narita, H.,
Popp, T., Rasmussen, S. O., Raynaud, D., Rothlisberger, R., Ruth, U., Samyn,
D., Schwander, J., Shoji, H., Siggard-Andersen, M. L., Steffensen, J. P.,
Stocker, T., Sveinbjörnsdóttir, A. E., Svensson, A., Takata, M.,
Tison, J. L., Thorsteinsson, T., Watanabe, O., Wilhelms, F., and White, J. W.
C.: High-resolution record of
Northern Hemisphere climate extending into the last interglacial period,
Nature, 431, 147–151, https://doi.org/10.1038/nature02805, 2004.
Baker, A., Ito, E., Smart, P. L., and McEwan, R. F.: Elevated and variable
values of 13C in speleothems in a British cave system, Chem. Geol.,
136, 263–270, https://doi.org/10.1016/S0009-2541(96)00129-5, 1997.
Bar-Matthews, M., Marean, C. W., Jacobs, Z., Karkanas, P., Fisher, E. C.,
Herries, A. I. R., Brown, K., Williams, H. M., Bernatchez, J., Ayalon, A.,
and Nilssen, P. J.: A high resolution and continuous isotopic speleothem
record of paleoclimate and paleoenvironment from 90 to 53 ka from Pinnacle
Point on the south coast of South Africa, Quaternary Sci. Rev., 29,
2131–2145, https://doi.org/10.1016/j.quascirev.2010.05.009, 2010.
Barbante, C., Barnola, J. M., Becagli, S., Beer,
J., Bigler, M., Boutron, C., Blunier, T., Castellano, E., Cattani, O.,
Chappellaz, J., Dahl-Jensen, D., Debret, M., Delmonte, B., Dick, D.,
Falourd, S., Faria, S., Federer, U., Fischer, H., Freitag, J., Frenzel, A.,
Fritzsche, D., Fundel, F., Gabrielli, P., Gaspari, V., Gersonde, R., Graf,
W., Grigoriev, D., Hamann, I., Hansson, M., Hoffmann, G., Hutterli, M. A.,
Huybrechts, P., Isaksson, E., Johnsen, S., Jouzel, J., Kaczmarska, M.,
Karlin, T., Kaufmann, P., Kipfstuhl, S., Kohno, M., Lambert, F., Lambrecht,
A., Lambrecht, A., Landais, A., Lawer, G., Leuenberger, M., Littot, G.,
Loulergue, L., Lüthi, D., Maggi, V., Marino, F., Masson-Delmotte, V.,
Meyer, H., Miller, H., Mulvaney, R., Narcisi, B., Oerlemans, J., Oerter, H.,
Parrenin, F., Petit, J. R., Raisbeck, G., Raynaud, D., Röthlisberger,
R., Ruth, U., Rybak, O., Severi, M., Schmitt, J., Schwander, J.,
Siegenthaler, U., Siggaard-Andersen, M. L., Spahni, R., Steffensen, J. P.,
Stenni, B., Stocker, T. F., Tison, J. L., Traversi, R., Udisti, R.,
Valero-Delgado, F., van den Broeke, M. R., van de Wal, R. S. W., Wagenbach,
D., Wegner, A., Weiler, K., Wilhelms, F., Winther, J. G., and Wolff, E.:
One-to-one coupling of glacial climate variability in Greenland and
Antarctica, Nature, 444, 195–198, https://doi.org/10.1038/nature05301, 2006.
Blyth, A. J. and Schouten, S.: Calibrating the glycerol dialkyl glycerol
tetraether temperature signal in speleothems, Geochim. Cosmochim. Ac., 109, 312–328, https://doi.org/10.1016/j.gca.2013.02.009, 2013.
Braun, K., Bar-Matthews, M., Ayalon, A., Zilberman, T., and Matthews, A.:
Rainfall isotopic variability at the intersection between winter and summer
rainfall regimes in coastal South Africa (Mossel Bay, Western Cape
Province), S. Afr. J. Geol., 120, 323–340,
https://doi.org/10.25131/gssajg.120.3.323, 2017.
Braun, K., Nehme, C., Pickering, R., Rogerson, M., and Scroxton, N.: A Window into Africa’s Past Hydroclimates: The SISAL_v1 Database Contribution, Quaternary, 2, 4, https://doi.org/10.3390/quat2010004, 2019a.
Braun, K., Bar-Matthews, M., Matthews, A., Ayalon, A., Cowling, R. M.,
Karkanas, P., Fisher, E. C., Dyez, K., Zilberman, T., and Marean, C. W.:
Late Pleistocene records of speleothem stable isotopic compositions from
Pinnacle Point on the South African south coast, Quaternary Res., 91,
265–288, https://doi.org/10.1017/qua.2018.61, 2019b.
Braun, K., Bar-Matthews, M., Matthews, A., Ayalon, A., Zilberman, T.,
Cowling, R. M., Fisher, E. C., Herries, A. I. R., Brink, J. S., and Marean,
C. W.: Comparison of climate and environment on the edge of the
Palaeo-Agulhas Plain to the Little Karoo (South Africa) in Marine Isotope
Stages 5–3 as indicated by speleothems, Quaternary Sci. Rev., 235,
105803, https://doi.org/10.1016/j.quascirev.2019.06.025, 2020.
Burns, S. J., McGee, D., Scroxton, N., Kinsley, C. W., Godfrey, L. R.,
Faina, P., and Ranivoharimanana, L.: Southern Hemisphere controls on ITCZ
variability in southwest Madagascar over the past 117 000 years, Quaternary Sci. Rev., 276, 107317,
https://doi.org/10.1016/j.quascirev.2021.107317, 2022.
Carr, A. S., Thomas, D. S. G., Bateman, M. D., Meadows, M. E., and Chase,
B.: Late Quaternary palaeoenvironments of the winter-rainfall zone of
southern Africa: Palynological and sedimentological evidence from the
Agulhas Plain, Palaeogeogr. Palaeocl., 239,
147–165, https://doi.org/10.1016/j.palaeo.2006.01.014, 2006.
Chase, B. M.: South African palaeoenvironments during marine oxygen isotope
stage 4: a context for the Howiesons Poort and Still Bay industries, J.
Archaeol. Sci., 37, 1359–1366, https://doi.org/10.1016/j.jas.2009.12.040, 2010.
Chase, B. M. and Meadows, M. E.: Late Quaternary dynamics of southern
Africa's winter rainfall zone, Earth-Sci. Rev., 84, 103–138,
https://doi.org/10.1016/j.earscirev.2007.06.002, 2007.
Chase, B., Harris, C., de Wit, M. J., Kramers, J., Doel, S., and
Stankiewicz, J.: South African speleothems reveal influence of high- and
low-latitude forcing over the past 113.5 k.y, Geology, 49, 1353–1357,
https://doi.org/10.1130/G49323.1, 2021.
Cheng, H., Lawrence Edwards, R., Shen, C.-C., Polyak, V. J., Asmerom, Y.,
Woodhead, J., Hellstrom, J., Wang, Y., Kong, X., Spötl, C., Wang, X.,
and Calvin Alexander, E.: Improvements in 230Th dating, 230Th and 234U
half-life values, and U–Th isotopic measurements by multi-collector
inductively coupled plasma mass spectrometry, Earth Planet. Sc.
Lett., 371–372, 82–91, https://doi.org/10.1016/j.epsl.2013.04.006, 2013.
Craig, H. and Gordon, L. I.: Deuterium and oxygen 18 variations in the ocean and the marine atmosphere, in: Stable Isotopes in Oceanographic Studies and Paleotempertures, edited by: Tongiorgi, E., Consiglio Nazionale delle Ricerche, Laboratorio di Geologia Nucleare, Pisa, 9–130, 1965.
d'Errico, F.: The invisible frontier. A multiple species model for the
origin of behavioral modernity, Evol. Anthropol., 12, 188–202, https://doi.org/10.1002/evan.10113, 2003.
de Graaf, S., Vonhof, H. B., Weissbach, T., Wassenburg, J. A., Levy, E. J.,
Kluge, T., and Haug, G. H.: A comparison of isotope ratio mass spectrometry
and cavity ring-down spectroscopy techniques for isotope analysis of fluid
inclusion water, Rapid Commun. Mass Sp., 34, e8837,
https://doi.org/10.1002/rcm.8837, 2020.
Deininger, M., Hansen, M., Fohlmeister, J., Schröder-Ritzrau, A.,
Burstyn, Y., and Scholz, D.: Are oxygen isotope fractionation factors
between calcite and water derived from speleothems systematically biased due
to prior calcite precipitation (PCP)?, Geochim. Cosmochim. Ac., 305,
212–227, https://doi.org/10.1016/j.gca.2021.03.026, 2021.
Dreybrodt, W.: Evolution of the isotopic composition of carbon and oxygen in
a calcite precipitating
Dreybrodt, W. and Fohlmeister, J.: The impact of outgassing of CO2 and prior
calcium precipitation to the isotope composition of calcite precipitated on
stalagmites. Implications for reconstructing climate information from
proxies, Chem. Geol., 589, 120676,
https://doi.org/10.1016/j.chemgeo.2021.120676, 2022.
Dyez, K. A., Zahn, R., and Hall, I. R.: Multicentennial Agulhas leakage
variability and links to North Atlantic climate during the past 80 000
years, Paleoceanography, 29, 1238–1248,
https://doi.org/10.1002/2014PA002698, 2014.
Edwards, R. L.: High precision thorium-230 ages of corals and the timing of
sea level fluctuations in the late Quaternary, Ph.D. thesis,
California Institute of California, https://resolver.caltech.edu/CaltechETD:etd-10112005-103528 (last access: 23 August 2023), 1988.
Engelbrecht, C. J., Landman, W. A., Engelbrecht, F. A., and Malherbe, J.: A
synoptic decomposition of rainfall over the Cape south coast of South
Africa, Clim. Dynam., 44, 2589–2607, https://doi.org/10.1007/s00382-014-2230-5, 2015.
Engelbrecht, F. A., Marean, C. W., Cowling, R. M., Engelbrecht, C. J.,
Neumann, F. H., Scott, L., Nkoana, R., O'Neal, D., Fisher, E., Shook, E.,
Franklin, J., Thatcher, M., McGregor, J. L., Van der Merwe, J., Dedekind,
Z., and Difford, M.: Downscaling Last Glacial Maximum climate over southern
Africa, Quaternary Sci. Rev., 226, 105879,
https://doi.org/10.1016/j.quascirev.2019.105879, 2019.
Epica Community Members: Stable oxygen isotopes of ice core EDML, PANGAEA
[data set], https://doi.org/10.1594/PANGAEA.754444, 2010.
Epstein, S., Buchsbaum, R., Lowenstam, H., and Urey, H. C.: Carbonate-Water
Istotopic Temperature Scale, Geol. Soc. Am. Bull., 62,
417–426, https://doi.org/10.1130/0016-7606(1951)62[417:CITS]2.0.CO;2, 1951.
Epstein, S., Buchsbaum, R., Lowenstam, H. A., and Urey, H. C.: Revised
Carbonate-Water Isotopic Temperature Scale, Geol. Soc. Am. Bull., 64, 1315–1325, https://doi.org/10.1130/0016-7606(1953)64[1315:RCITS]2.0.CO;2,
1953.
Fairchild, I. J. and Baker, A.: The Architecture of Speleothems, in: Speleothem Science, Wiley Online Books, 205–244, https://doi.org/10.1002/9781444361094.ch4, 2012a.
Fairchild, I. J. and Baker, A.: The Holocene Epoch: Testing the Climate and Environmental Proxies, in: Speleothem Science, Wiley Online Books, 324-=352, https://doi.org/10.1002/9781444361094.ch11, 2012b.
Fairchild, I. J. and Baker, A.: The Speleothem Incubator, in: Speleothem Science, Wiley Online Books, 105–147, https://doi.org/10.1002/9781444361094.ch4, 2012c.
Fairchild, I. J. and Treble, P. C.: Trace elements in speleothems as
recorders of environmental change, Quaternary Sci. Rev., 28, 449–468,
https://doi.org/10.1016/j.quascirev.2008.11.007, 2009.
Fairchild, I. J., Borsato, A., Tooth, A. F., Frisia, S., Hawkesworth, C. J.,
Huang, Y., McDermott, F., and Spiro, B.: Controls on trace element (Sr–Mg)
compositions of carbonate cave waters: implications for speleothem climatic
records, Chem. Geol., 166, 255–269,
https://doi.org/10.1016/S0009-2541(99)00216-8, 2000.
Fernandez, A., Løland, M. H., Maccali, J., Krüger, Y., Vonhof, H. B.,
Sodemann, H., and Meckler, A. N.: Characterisation and correction of
evaporative artifacts in speleothem fluid inclusion isotope analysis as
applied to a stalagmite from Borneo, ESS Open Archive,
https://doi.org/10.22541/essoar.167340715.57808428/v1, 2023.
Fohlmeister, J., Voarintsoa, N. R. G., Lechleitner, F. A., Boyd, M.,
Brandtstätter, S., Jacobson, M. J., and Oster, J. L.: Main controls on
the stable carbon isotope composition of speleothems, Geochim. Cosmochim. Ac., 279, 67–87, https://doi.org/10.1016/j.gca.2020.03.042,
2020.
Frisia, S.: Microstratigraphic logging of calcite fabrics in speleothems as
tool for palaeoclimate studies, Int. J. Speleol., 44,
1–16, https://doi.org/10.5038/1827-806X.44.1.1, 2015.
Frisia, S., Borsato, A., Fairchild, I. J., McDermott, F., and Selmo, E. M.:
Aragonite-calcite relationships in speleothems (Grotte de Clamouse, France):
Environment, fabrics, and carbonate geochemistry, J. Sediment.
Res., 72, 687–699, https://doi.org/10.1306/020702720687, 2002.
Frisia, S., Fairchild, I. J., Fohlmeister, J., Miorandi, R., Spötl, C.,
and Borsato, A.: Carbon mass-balance modelling and carbon isotope exchange
processes in dynamic caves, Geochim. Cosmochim. Ac., 75, 380–400,
https://doi.org/10.1016/j.gca.2010.10.021, 2011.
Göktürk, O. M., Sobolowski, S. P., Simon, M. H., Zhang, Z., and
Jansen, E.: Sensitivity of coastal southern African climate to changes in
coastline position and associated land extent over the last glacial,
Quaternary Sci. Rev., 300, 107893,
https://doi.org/10.1016/j.quascirev.2022.107893, 2023.
Grant, K. M., Rohling, E. J., Bar-Matthews, M., Ayalon, A., Medina-Elizalde,
M., Ramsey, C. B., Satow, C., and Roberts, A. P.: Rapid coupling between ice
volume and polar temperature over the past 150 000 years, Nature, 491,
744–747, https://doi.org/10.1038/nature11593, 2012.
Hansen, M., Scholz, D., Schöne, B. R., and Spötl, C.: Simulating
speleothem growth in the laboratory: Determination of the stable isotope
fractionation (δ13C and δ18O) between H2O, DIC and CaCO3,
Chem. Geol., 509, 20–44, https://doi.org/10.1016/j.chemgeo.2018.12.012,
2019.
Henshilwood, C. S., D'Errico, F., Van Niekerk, K. L., Coquinot, Y., Jacobs,
Z., Lauritzen, S. E., Menu, M., and García-Moreno, R.: A
100 000-year-old ochre-processing workshop at Blombos Cave, South Africa,
Science, 334, 219–222, https://doi.org/10.1126/science.1211535, 2011.
Henshilwood, C. S., van Niekerk, K. L., Wurz, S., Delagnes, A., Armitage, S.
J., Rifkin, R. F., Douze, K., Keene, P., Haaland, M. M., Reynard, J.,
Discamps, E., and Mienies, S. S.: Klipdrift Shelter, southern Cape, South
Africa: preliminary report on the Howiesons Poort layers, J.
Archaeol. Sci., 45, 284–303,
https://doi.org/10.1016/j.jas.2014.01.033, 2014.
Holmgren, K., Karlén, W., and Shaw, P. A.: Paleoclimatic Significance of
the Stable Isotopic Composition and Petrology of a Late Pleistocene
Stalagmite from Botswana, Quaternary Res., 43, 320–328,
https://doi.org/10.1006/qres.1995.1038, 1995.
Holzkämper, S., Holmgren, K., Lee-Thorp, J., Talma, S., Mangini, A., and
Partridge, T.: Late Pleistocene stalagmite growth in Wolkberg Cave, South
Africa, Earth Planet. Sc. Lett., 282, 212-221,
https://doi.org/10.1016/j.epsl.2009.03.016, 2009.
Huber, C., Leuenberger, M., Spahni, R., Flückiger, J., Schwander, J.,
Stocker, T. F., Johnsen, S., Landais, A., and Jouzel, J.: Isotope calibrated
Greenland temperature record over Marine Isotope Stage 3 and its relation to
CH4, Earth Planet. Sc. Lett., 243, 504–519,
https://doi.org/10.1016/j.epsl.2006.01.002, 2006.
Jacobs, Z., Jones, B. G., Cawthra, H. C., Henshilwood, C. S., and Roberts,
R. G.: The chronological, sedimentary and environmental context for the
archaeological deposits at Blombos Cave, South Africa, Quaternary Sci. Rev., 235, 105850, https://doi.org/10.1016/j.quascirev.2019.07.032, 2020.
Kindler, P., Guillevic, M., Baumgartner, M., Schwander, J., Landais, A., and Leuenberger, M.: Temperature reconstruction from 10 to 120 kyr b2k from the NGRIP ice core, Clim. Past, 10, 887–902, https://doi.org/10.5194/cp-10-887-2014, 2014.
Kirst, G. J., Schneider, R. R., Müller, P. J., von Storch, I., and Wefer, G.: Late Quaternary Temperature Variability in the
Benguela Current System Derived from Alkenones, Quaternary Res., 52, 92–103, https://doi.org/10.1006/qres.1999.2040, 1999.
Kluge, T., Marx, T., Scholz, D., Niggemann, S., Mangini, A., and
Aeschbach-Hertig, W.: A new tool for palaeoclimate reconstruction: Noble gas
temperatures from fluid inclusions in speleothems, Earth Planet. Sc. Lett., 269, 408–415, https://doi.org/10.1016/j.epsl.2008.02.030,
2008.
Krüger, Y., Marti, D., Staub, R. H., Fleitmann, D., and Frenz, M.:
Liquid-vapour homogenisation of fluid inclusions in stalagmites: Evaluation
of a new thermometer for palaeoclimate research, Chem. Geol., 289,
39–47, https://doi.org/10.1016/j.chemgeo.2011.07.009, 2011.
Lachniet, M. S.: Climatic and environmental controls on speleothem
oxygen-isotope values, Quaternary Sci. Rev., 28, 412–432,
https://doi.org/10.1016/j.quascirev.2008.10.021, 2009.
Løland, M. H., Krüger, Y., Fernandez, A., Buckingham, F., Carolin, S.
A., Sodemann, H., Adkins, J. F., Cobb, K. M., and Meckler, A. N.: Evolution
of tropical land temperature across the last glacial termination, Nat.
Commun., 13, 5158, https://doi.org/10.1038/s41467-022-32712-3, 2022.
Ludwig, K. R.: User's Manual for Isoplot 3.00: A Geochronological Toolkit
for Microsoft Excel, Berkeley Geochronology Center Special Publication, https://www.bgc.org/isoplot
(last access: 24 August 2023),
2003.
Marean, C. W., Bar-Matthews, M., Bernatchez, J., Fisher, E., Goldberg, P.,
Herries, A. I. R., Jacobs, Z., Jerardino, A., Karkanas, P., Minichillo, T.,
Nilssen, P. J., Thompson, E., Watts, I., and Williams, H. M.: Early human
use of marine resources and pigment in South Africa during the Middle
Pleistocene, Nature, 449, 905–908, https://doi.org/10.1038/nature06204, 2007.
Marti, D., Kruger, Y., Fleitmann, D., Frenz, M., and Ricka, J.: The effect
of surface tension on liquid-gas equilibria in isochoric systems and its
application to fluid inclusions, Fluid Phase Equilibr., 314, 13–21,
https://doi.org/10.1016/j.fluid.2011.08.010, 2012.
Matthews, A., Affek, H. P., Ayalon, A., Vonhof, H. B., and Bar-Matthews, M.:
Eastern Mediterranean climate change deduced from the Soreq Cave fluid
inclusion stable isotopes and carbonate clumped isotopes record of the last
160 ka, Quaternary Sci. Rev., 272, 107223, https://doi.org/10.1016/j.quascirev.2021.107223,
2021.
McCrea, J. M.: On the Isotopic Chemistry of Carbonates and a
Paleotemperature Scale, J. Chem. Phys., 18, 849–857,
https://doi.org/10.1063/1.1747785, 1950.
Meckler, A. N., Affolter, S., Dublyansky, Y. V., Krüger, Y., Vogel, N.,
Bernasconi, S. M., Frenz, M., Kipfer, R., Leuenberger, M., Spötl, C.,
Carolin, S., Cobb, K. M., Moerman, J., Adkins, J. F., and Fleitmann, D.:
Glacial-interglacial temperature change in the tropical West Pacific: A
comparison of stalagmite-based paleo-thermometers, Quaternary Sci. Rev., 127, 90–116, https://doi.org/10.1016/j.quascirev.2015.06.015, 2015.
Mickler, P. J., Banner, J. L., Stern, L., Asmerom, Y., Edwards, R. L., and
Ito, E.: Stable isotope variations in modern tropical speleothems:
Evaluating equilibrium vs. kinetic isotope effects, Geochim. Cosmochim. Ac., 68, 4381–4393,
https://doi.org/10.1016/j.gca.2004.02.012, 2004.
Mickler, P. J., Stern, L. A., and Banner, J. L.: Large kinetic isotope
effects in modern speleothems, GSA Bulletin, 118, 65–81, https://doi.org/10.1130/B25698.1,
2006.
Morse, J. W. and Bender, M. L.: Partition coefficients in calcite:
Examination of factors influencing the validity of experimental results and
their application to natural systems, Chem. Geol., 82, 265–277,
https://doi.org/10.1016/0009-2541(90)90085-L, 1990.
Noah, J.: Reconstructing palaeoenvironments during the Middle Stone Age in
the southern Cape, South Africa: stable isotope analysis of speleothems from
the De Hoop Nature Reserve, Faculty of Science, University of the
Wiwatersrand, Johannesburg, http://hdl.handle.net/10539/10083 (last access: 20 August 2023), 2011.
Oster, J. L., Montañez, I. P., and Kelley, N. P.: Response of a modern
cave system to large seasonal precipitation variability, Geochim. Cosmochim. Ac., 91, 92–108, https://doi.org/10.1016/j.gca.2012.05.027,
2012.
Partridge, T. C., Demenocal, P. B., Lorentz, S. A., Paiker, M. J., and
Vogel, J. C.: Orbital forcing of climate over South Africa: A 200 000-year
rainfall record from the pretoria saltpan, Quaternary Sci. Rev., 16,
1125–1133, https://doi.org/10.1016/S0277-3791(97)00005-X, 1997.
Peeters, F. J. C., Acheson, R., Brummer, G.-J. A., de Ruijter, W. P. M.,
Schneider, R. R., Ganssen, G. M., Ufkes, E., and Kroon, D.: Vigorous
exchange between the Indian and Atlantic oceans at the end of the past five
glacial periods, Nature, 430, 661–665, https://doi.org/10.1038/nature02785, 2004.
Poulson, T. L. and White, W. B.: The Cave Environment, Science, 165, 971–981, https://doi.org/10.1126/science.165.3897.971, 1969.
Quick, L. J., Meadows, M. E., Bateman, M. D., Kirsten, K. L.,
Mäusbacher, R., Haberzettl, T., and Chase, B. M.: Vegetation and climate
dynamics during the last glacial period in the fynbos-afrotemperate forest
ecotone, southern Cape, South Africa, Quater. Int., 404,
136–149, https://doi.org/10.1016/j.quaint.2015.08.027, 2016.
Railsback, L. B., Brook, G. A., Liang, F., Marais, E., Cheng, H., and
Edwards, R. L.: A multi-proxy stalagmite record from northwestern Namibia of
regional drying with increasing global-scale warmth over the last 47 kyr: The
interplay of a globally shifting ITCZ with regional currents, winds, and
rainfall, Palaeogeogr., Palaeoclim. 461, 109–121,
https://doi.org/10.1016/j.palaeo.2016.08.014, 2016.
Roffe, S. J., Fitchett, J. M., and Curtis, C. J.: Classifying and mapping
rainfall seasonality in South Africa: a review, South Afr. Geogr.
J., 101, 158–174, https://doi.org/10.1080/03736245.2019.1573151, 2019.
Rokkan, H. A.: Sporelementer i speleothemer – klimasignal og
markørhorisonter,
Department of Earth sciences, University of Bergen, https://bora.uib.no/bora-xmlui/handle/1956/20933 (last access: 20 August 2023), 2019.
Schlitzer, R.: Interactive analysis and visualization of geoscience data with Ocean Data View, Comput. Geosci., 28, 1211–1218, https://doi.org/10.1016/S0098-3004(02)00040-7, 2002.
Scholz, D. and Hoffmann, D. L.: StalAge – An algorithm designed for
construction of speleothem age models, Quat. Geochronol., 6, 369–382,
https://doi.org/10.1016/j.quageo.2011.02.002, 2011.
Scroxton, N., Burns, S., Dawson, P., Rhodes, J. M., Brent, K., McGee, D.,
Heijnis, H., Gadd, P., Hantoro, W., and Gagan, M.: Rapid measurement of
strontium in speleothems using core-scanning micro X-ray fluorescence,
Chem. Geol., 487, 12–22, https://doi.org/10.1016/j.chemgeo.2018.04.008,
2018.
Siddall, M., Rohling, E. J., Thompson, W. G., and Waelbroeck, C.: Marine
isotope stage 3 sea level fluctuations: Data synthesis and new outlook,
Rev. Geophys., 46, RG4003, https://doi.org/10.1029/2007RG000226, 2008.
Simon, M. H., Arthur, K. L., Hall, I. R., Peeters, F. J. C., Loveday, B. R.,
Barker, S., Ziegler, M., and Zahn, R.: Millennial-scale Agulhas Current
variability and its implications for salt-leakage through the
Indian–Atlantic Ocean Gateway, Earth Planet. Sc. Lett., 383,
101–112, https://doi.org/10.1016/j.epsl.2013.09.035, 2013.
Sodemann, H., Dekhtyareva, A., Fernandez, A., Seidl, A., and Maccali, J.: A flexible device to produce a gas stream with precisely controlled water vapour mixing ratio and isotope composition based on microdrop dispensing technology, Atmos. Meas. Tech. Discuss. [preprint], https://doi.org/10.5194/amt-2023-55, in review, 2023.
Stoll, H. M., Müller, W., and Prieto, M.: I-STAL, a model for
interpretation of
Strobel, P., Bliedtner, M., Carr, A. S., Struck, J., du Plessis, N., Glaser,
B., Meadows, M. E., Quick, L. J., Zech, M., Zech, R., and Haberzettl, T.:
Reconstructing Late Quaternary precipitation and its source on the southern
Cape coast of South Africa: A multi-proxy paleoenvironmental record from
Vankervelsvlei, Quaternary Sci. Rev., 284, 107467,
https://doi.org/10.1016/j.quascirev.2022.107467, 2022.
Stuut, J.-B. W., Prins, M. A., Schneider, R. R., Weltje, G. J., Jansen, J.
H. F., and Postma, G.: A 300-kyr record of aridity and wind strength in
southwestern Africa: inferences from grain-size distributions of sediments
on Walvis Ridge, SE Atlantic, Mar. Geol., 180, 221–233,
https://doi.org/10.1016/S0025-3227(01)00215-8, 2002.
Talma, A. S. and Vogel, J. C.: Late Quaternary Paleotemperatures Derived
from a Speleothem from Cango Caves, Cape Province, South Africa, Quaternary Res., 37, 203–213, https://doi.org/10.1016/0033-5894(92)90082-T, 1992.
Taylor, S. R. and McLennan, S. M.: The Continental Crust: its Composition
and Evolution, Geoscience Texts, Blackwell Scientific Publications, Oxford,
312 pp., https://www.osti.gov/biblio/6582885
(last access: 24 August 2023), 1985.
Tremaine, D. M., Froelich, P. N., and Wang, Y.: Speleothem calcite farmed in
situ: Modern calibration of δ18O and δ13C paleoclimate
proxies in a continuously-monitored natural cave system, Geochim. Cosmochim. Ac., 75, 4929–4950, https://doi.org/10.1016/j.gca.2011.06.005,
2011.
Urey, H. C.: The Thermodynamic Properties of Isotopic Substances, J. Chem. Soc., 1947, 562–581, https://doi.org/10.1039/jr9470000562, 1947.
van Breukelen, M. R., Vonhof, H. B., Hellstrom, J. C., Wester, W. C. G., and
Kroon, D.: Fossil dripwater in stalagmites reveals Holocene temperature and
rainfall variation in Amazonia, Earth Planet. Sc. Lett., 275,
54–60, https://doi.org/10.1016/j.epsl.2008.07.060, 2008.
Van Meerbeeck, C. J., Renssen, H., and Roche, D. M.: How did Marine Isotope Stage 3 and Last Glacial Maximum climates differ? – Perspectives from equilibrium simulations, Clim. Past, 5, 33–51, https://doi.org/10.5194/cp-5-33-2009, 2009.
Vonhof, H. B., van Breukelen, M. R., Postma, O., Rowe, P. J., Atkinson, T.
C., and Kroon, D.: A continuous-flow crushing device for on-line delta H-2
analysis of fluid inclusion water in speleothems, Rapid Commun. Mass Sp., 20, 2553–2558, https://doi.org/10.1002/rcm.2618, 2006.
Wadley, L.: What Stimulated Rapid, Cumulative Innovation After 100,000 Years Ago?, J. Archaeol. Method
Th., 28, 120–141, https://doi.org/10.1007/s10816-020-09499-y, 2021.
Wainer, K., Genty, D., Blamart, D., Daëron, M., Bar-Matthews, M.,
Vonhof, H., Dublyansky, Y., Pons-Branchu, E., Thomas, L., van Calsteren, P.,
Quinif, Y., and Caillon, N.: Speleothem record of the last 180 ka in Villars
cave (SW France): Investigation of a large δ18O shift between MIS6
and MIS5, Quaternary Sci. Rev., 30, 130–146,
https://doi.org/10.1016/j.quascirev.2010.07.004, 2011.
Warken, S. F., Weißbach, T., Kluge, T., Vonhof, H., Scholz, D., Vieten, R., Schmidt, M., Winter, A., and Frank, N.: Last glacial millennial-scale hydro-climate and temperature changes in Puerto Rico constrained by speleothem fluid inclusion δ18O and δ2H values, Clim. Past, 18, 167–181, https://doi.org/10.5194/cp-18-167-2022, 2022.
Wassenburg, J. A., Riechelmann, S., Schröder-Ritzrau, A., Riechelmann,
D. F. C., Richter, D. K., Immenhauser, A., Terente, M., Constantin, S.,
Hachenberg, A., Hansen, M., and Scholz, D.: Calcite Mg and Sr partition
coefficients in cave environments: Implications for interpreting prior
calcite precipitation in speleothems, Geochim. Cosmochim. Ac., 269,
581–596, https://doi.org/10.1016/j.gca.2019.11.011, 2020.
Wassenburg, J. A., Vonhof, H. B., Cheng, H., Martinez-Garcia, A., Ebner, P.
R., Li, X. L., Zhang, H. W., Sha, L. J., Tian, Y., Edwards, R. L., Fiebig,
J., and Haug, G. H.: Penultimate deglaciation Asian monsoon response to
North Atlantic circulation collapse, Nat. Geosci., 14, 937–941,
https://doi.org/10.1038/s41561-021-00851-9, 2021.
Wortham, B. E., Montanez, I. P., Swart, P. K., Vonhof, H., and Tabor, C.:
Variability in effective moisture inferred from inclusion fluid delta O-18
and delta H-2 values in a central Sierra Nevada stalagmite (CA), Quaternary Sci. Rev., 279, 107399, https://doi.org/10.1016/j.quascirev.2022.107399, 2022.
Wurz, S.: Variability in the Middle Stone Age Lithic Sequence,
115 000–60 000 Years Ago at Klasies River, South Africa, J.
Archaeol. Sci., 29, 1001–1015,
https://doi.org/10.1006/jasc.2001.0799, 2002.
Short summary
The southern coast of South Africa hosts some key archeological sites for the study of early human evolution. Here we present a short but high-resolution record of past changes in the hydroclimate and temperature on the southern coast of South Africa based on the study of a speleothem collected from Bloukrantz Cave. Overall, the paleoclimate indicators suggest stable temperature from 48.3 to 45.2 ka, whereas precipitation was variable, with marked short drier episodes.
The southern coast of South Africa hosts some key archeological sites for the study of early...
