Articles | Volume 9, issue 4
Research article 15 Aug 2013
Research article | 15 Aug 2013
Late Holocene summer temperatures in the central Andes reconstructed from the sediments of high-elevation Laguna Chepical, Chile (32° S)
R. de Jong et al.
No articles found.
Paul D. Zander, Maurycy Żarczyński, Wojciech Tylmann, Shauna-kay Rainford, and Martin Grosjean
Clim. Past Discuss.,
Revised manuscript accepted for CPShort summary
High-resolution geochemical imaging techniques provide new opportunities to investigate the biogeochemical composition of sediments at micrometer scale. Here, we compare biogeochemical data from biochemical varves with meteorological data to understand how seasonal meteorological variations are recorded in varve composition. We find that these scanning techniques help to clarify climate-proxy relationships in biochemical varves and show great potential for high-resolution climate reconstruction.
Stamatina Makri, Andrea Lami, Luyao Tu, Wojciech Tylmann, Hendrik Vogel, and Martin Grosjean
Biogeosciences, 18, 1839–1856,Short summary
Anoxia in lakes is a major growing concern. In this study we applied a multiproxy approach combining high-resolution hyperspectral imaging (HSI) pigment data with specific HPLC data to examine the Holocene evolution and main drivers of lake anoxia and trophic state changes. We find that when human impact was low, these changes were driven by climate and natural lake-catchment evolution. In the last 500 years, increasing human impact has promoted lake eutrophication and permanent anoxia.
Luyao Tu, Paul Zander, Sönke Szidat, Ronald Lloren, and Martin Grosjean
Biogeosciences, 17, 2715–2729,Short summary
In a small, deep lake on the Swiss Plateau, net fluxes of labile P fractions in sediments that can be released to surface waters have been predominately controlled by past hypolimnetic anoxic conditions since the early 1900s. More than 40 years of hypolimnetic withdrawal can effectively reduce net P fluxes in sediments and internal P loads but not effectively decrease eutrophication. These findings should likely serve the management of deep eutrophic lakes in temperate zones.
Christoph Dätwyler, Martin Grosjean, Nathan J. Steiger, and Raphael Neukom
Clim. Past, 16, 743–756,Short summary
The El Niño–Southern Oscillation (ENSO) and Southern Annular Mode (SAM) are two important modes of climate variability, strongly influencing climate across the tropics and Southern Hemisphere mid- to high latitudes. This study sheds light on their relationship over the past millennium, combining evidence from palaeoclimate proxy archives and climate models. We show that their indices were mostly negatively correlated with fluctuations likely driven by internal variability in the climate system.
Paul D. Zander, Sönke Szidat, Darrell S. Kaufman, Maurycy Żarczyński, Anna I. Poraj-Górska, Petra Boltshauser-Kaltenrieder, and Martin Grosjean
Geochronology, 2, 63–79,Short summary
Recent technological advances allow researchers to obtain radiocarbon ages from smaller samples than previously possible. We investigate the reliability and precision of radiocarbon ages obtained from miniature (11–150 μg C) samples of terrestrial plant fragments taken from sediment cores from Lake Żabińskie, Poland. We further investigate how sampling density (the number of ages per 1000 years) and sample mass (which is related to age precision) influence the performance of age–depth models.
Chris S. M. Turney, Helen V. McGregor, Pierre Francus, Nerilie Abram, Michael N. Evans, Hugues Goosse, Lucien von Gunten, Darrell Kaufman, Hans Linderholm, Marie-France Loutre, and Raphael Neukom
Clim. Past, 15, 611–615,Short summary
This PAGES (Past Global Changes) 2k (climate of the past 2000 years working group) special issue of Climate of the Past brings together the latest understanding of regional change and impacts from PAGES 2k groups across a range of proxies and regions. The special issue has emerged from a need to determine the magnitude and rate of change of regional and global climate beyond the timescales accessible within the observational record.
Darrell S. Kaufman and PAGES 2k special-issue editorial team
Clim. Past, 14, 593–600,Short summary
We explain the procedure used to attain a high and consistent level of data stewardship across a special issue of the journal Climate of the Past. We discuss the challenges related to (1) determining which data are essential for public archival, (2) using data generated by others, and (3) understanding data citations. We anticipate that open-data sharing in paleo sciences will accelerate as the advantages become more evident and as practices that reduce data loss become the accepted convention.
B. Ausín, I. Hernández-Almeida, J.-A. Flores, F.-J. Sierro, M. Grosjean, G. Francés, and B. Alonso
Clim. Past, 11, 1635–1651,Short summary
Coccolithophore distribution in 88 surface sediment samples in the Atlantic Ocean and western Mediterranean was mainly influenced by salinity at 10m depth. A quantitative coccolithophore-based transfer function was developed and applied to a fossil sediment core to estimate sea surface salinity (SSS). The quality of this function and the reliability of the SSS reconstruction were assessed by statistical analyses and discussed. Several centennial SSS changes are identified for the last 15.5 ka.
M. E. de Porras, A. Maldonado, F. A. Quintana, A. Martel-Cea, O. Reyes, and C. Méndez
Clim. Past, 10, 1063–1078,
J. Elbert, M. Jacques-Coper, M. Van Daele, R. Urrutia, and M. Grosjean
Clim. Past Discuss.,
Revised manuscript has not been submitted
Related subject area
Subject: Atmospheric Dynamics | Archive: Terrestrial Archives | Timescale: HoloceneHolocene sea level and environmental change at the southern Cape – an 8.5 kyr multi-proxy paleoclimate record from Lake Voëlvlei, South AfricaTree-ring-based spring precipitation reconstruction in the Sikhote-Alin' Mountain rangeRadionuclide wiggle matching reveals a nonsynchronous early Holocene climate oscillation in Greenland and western Europe around a grand solar minimumHydrological variations in central China over the past millennium and their links to the tropical Pacific and North Atlantic oceansAtmospheric blocking induced by the strengthened Siberian High led to drying in west Asia during the 4.2 ka BP event – a hypothesisHydro-climatic variability in the southwestern Indian Ocean between 6000 and 3000 years agoEvidence for increased expression of the Amundsen Sea Low over the South Atlantic during the late HoloceneThe 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoonDrought and vegetation change in the central Rocky Mountains and western Great Plains: potential climatic mechanisms associated with megadrought conditions at 4200 cal yr BPPlacing the Common Era in a Holocene context: millennial to centennial patterns and trends in the hydroclimate of North America over the past 2000 yearsMulti-century cool- and warm-season rainfall reconstructions for Australia's major climatic regionsReconstructing Late Holocene North Atlantic atmospheric circulation changes using functional paleoclimate networksPeriodic input of dust over the Eastern Carpathians during the Holocene linked with Saharan desertification and human impactFrequency and intensity of palaeofloods at the interface of Atlantic and Mediterranean climate domainsA 250-year periodicity in Southern Hemisphere westerly winds over the last 2600 yearsNon-linear regime shifts in Holocene Asian monsoon variability: potential impacts on cultural change and migratory patternsThe influence of atmospheric circulation on the mid-Holocene climate of Europe: a data–model comparisonEffects of dating errors on nonparametric trend analyses of speleothem time seriesPrecipitation variability in the winter rainfall zone of South Africa during the last 1400 yr linked to the austral westerliesRelationship between Holocene climate variations over southern Greenland and eastern Baffin Island and synoptic circulation pattern
Paul Strobel, Marcel Bliedtner, Andrew S. Carr, Peter Frenzel, Björn Klaes, Gary Salazar, Julian Struck, Sönke Szidat, Roland Zech, and Torsten Haberzettl
Clim. Past, 17, 1567–1586,Short summary
This study presents a multi-proxy record from Lake Voёlvlei and provides new insights into the sea level and paleoclimate history of the past 8.5 ka at South Africa’s southern Cape coast. Our results show that sea level changes at the southern coast are in good agreement with the western coast of South Africa. In terms of climate our record provides valuable insights into changing sources of precipitation at the southern Cape coast, i.e. westerly- and easterly-derived precipitation contribution.
Olga Ukhvatkina, Alexander Omelko, Dmitriy Kislov, Alexander Zhmerenetsky, Tatyana Epifanova, and Jan Altman
Clim. Past, 17, 951–967,Short summary
We present the first precipitation reconstructions for three sites along a latitudinal gradient in the Sikhote-Alin' mountains (Russian Far East). The reconstructions are based on Korean pine tree rings. We found that an important limiting factor for this species growth was precipitation during the spring-to-early-summer period. The periodicity found in our reconstructions suggests the influence of El Niño–Southern Oscillation and Pacific Dedacadal Oscillation on the region's climate.
Florian Mekhaldi, Markus Czymzik, Florian Adolphi, Jesper Sjolte, Svante Björck, Ala Aldahan, Achim Brauer, Celia Martin-Puertas, Göran Possnert, and Raimund Muscheler
Clim. Past, 16, 1145–1157,Short summary
Due to chronology uncertainties within paleoclimate archives, it is unclear how climate oscillations from different records relate to one another. By using radionuclides to synchronize Greenland ice cores and a German lake record over 11 000 years, we show that two oscillations observed in these records were not synchronous but terminated and began with the onset of a grand solar minimum. Both this and changes in ocean circulation could have played a role in the two climate oscillations.
Fucai Duan, Zhenqiu Zhang, Yi Wang, Jianshun Chen, Zebo Liao, Shitao Chen, Qingfeng Shao, and Kan Zhao
Clim. Past, 16, 475–485,Short summary
We reconstruct a detailed history of the East Asian summer monsoon (EASM) using stalagmite records in central China during the last millennium. We estimate responses of the EASM to anthropogenic global warming by comparing its relative intensity between the Current Warm Period and Medieval Climate Anomaly, two recent warm periods. We also study potential links of the EASM to the tropical Pacific and North Atlantic oceans. This work advances our understanding of EASM dynamics.
Aurel Perşoiu, Monica Ionita, and Harvey Weiss
Clim. Past, 15, 781–793,Short summary
We present a reconstruction of winter climate around 4.2 ka cal BP in Europe, west Asia, and northern Africa that shows generally low temperatures and heterogeneously distributed precipitation. We hypothesize that in the extratropical Northern Hemisphere the 4.2 ka BP event was caused by the strengthening and expansion of the Siberian High, which effectively blocked the moisture-carrying westerlies from reaching west Asia and also resulted in outbreaks of northerly cold and dry winds.
Hanying Li, Hai Cheng, Ashish Sinha, Gayatri Kathayat, Christoph Spötl, Aurèle Anquetil André, Arnaud Meunier, Jayant Biswas, Pengzhen Duan, Youfeng Ning, and Richard Lawrence Edwards
Clim. Past, 14, 1881–1891,Short summary
4.2 ka eventbetween 4.2 and 3.9 ka has been widely discussed in the Northern Hemsiphere but less reported in the Southern Hemisphere. Here, we use speleothem records from Rodrigues in the southwestern Indian Ocean spanning from 6000 to 3000 years ago to investigate the regional hydro-climatic variability. Our records show no evidence for an unusual climate anomaly between 4.2 and 3.9 ka. Instead, it shows a multi-centennial drought between 3.9 and 3.5 ka.
Zoë A. Thomas, Richard T. Jones, Chris J. Fogwill, Jackie Hatton, Alan N. Williams, Alan Hogg, Scott Mooney, Philip Jones, David Lister, Paul Mayewski, and Chris S. M. Turney
Clim. Past, 14, 1727–1738,Short summary
We report a high-resolution study of a 5000-year-long peat record from the Falkland Islands. This area sensitive to the dynamics of the Amundsen Sea Low, which plays a major role in modulating the Southern Ocean climate. We find wetter, colder conditions between 5.0 and 2.5 ka due to enhanced southerly airflow, with the establishment of drier and warmer conditions from 2.5 ka to present. This implies more westerly airflow and the increased projection of the ASL onto the South Atlantic.
Jule Xiao, Shengrui Zhang, Jiawei Fan, Ruilin Wen, Dayou Zhai, Zhiping Tian, and Dabang Jiang
Clim. Past, 14, 1417–1425,Short summary
Multiple proxies of a sediment core at Hulun Lake in the northern margin of the EASM reveal a prominent dry event at the interval of 4210–3840 cal. yr BP that could be the regional manifestation of the 4.2 ka BP event. Future studies should be focused on the investigation of high-quality, high-resolution proxy records from climatically sensitive and geographically representative regions in order to explore the spatiotemporal pattern of the 4.2 ka BP event and the associated dynamic mechanism.
Vachel A. Carter, Jacqueline J. Shinker, and Jonathon Preece
Clim. Past, 14, 1195–1212,Short summary
Between 4200 and 4000 cal yr BP, paleoecological evidence suggests a megadrought occurred in the central Rocky Mountains and western Great Plains. Modern climate analogues were used to explore potential climate mechanisms responsible for the ecological changes. Analogues illustrate that warm and dry conditions persisted through the growing season as a result of anomalously higher-than-normal heights centred over the Great Plains which suppressed moisture transport to the region.
Bryan N. Shuman, Cody Routson, Nicholas McKay, Sherilyn Fritz, Darrell Kaufman, Matthew E. Kirby, Connor Nolan, Gregory T. Pederson, and Jeannine-Marie St-Jacques
Clim. Past, 14, 665–686,Short summary
A synthesis of 93 published records reveals that moisture availability increased over large portions of North America over the past 2000 years, the Common Era (CE). In many records, the second millennium CE tended to be wetter than the first millennium CE. The long-term changes formed the background for annual to multi-decade variations, such as "mega-droughts", and also provide a context for amplified rates of hydrologic change today.
Mandy Freund, Benjamin J. Henley, David J. Karoly, Kathryn J. Allen, and Patrick J. Baker
Clim. Past, 13, 1751–1770,Short summary
To understand how climate change will influence Australian rainfall we must first understand the long-term context of droughts and floods. We reconstruct warm and cool season rainfall in Australia's eight major climatic regions for several centuries into the past, building the clearest picture yet of long-term rainfall variability across the Australian continent. We find recent rainfall increases in the warm season in the north, and declines in the cool season in the south, to be highly unusual.
Jasper G. Franke, Johannes P. Werner, and Reik V. Donner
Clim. Past, 13, 1593–1608,Short summary
We apply evolving functional network analysis, a tool for studying temporal changes of the spatial co-variability structure, to a set of Late Holocene paleoclimate proxy records covering the last two millennia. The emerging patterns obtained by our analysis are related to long-term changes in the dominant mode of atmospheric circulation in the region, the North Atlantic Oscillation (NAO). We obtain a qualitative reconstruction of the NAO long-term variability over the entire Common Era.
Jack Longman, Daniel Veres, Vasile Ersek, Ulrich Salzmann, Katalin Hubay, Marc Bormann, Volker Wennrich, and Frank Schäbitz
Clim. Past, 13, 897–917,Short summary
We present the first record of dust input into an eastern European bog over the past 10 800 years. We find significant changes in past dust deposition, with large inputs related to both natural and human influences. We show evidence that Saharan desertification has had a significant impact on dust deposition in eastern Europe for the past 6100 years.
B. Wilhelm, H. Vogel, C. Crouzet, D. Etienne, and F. S. Anselmetti
Clim. Past, 12, 299–316,Short summary
The long-term response of the flood activity to both Atlantic and Mediterranean climatic influences was explored by reconstructing the Foréant record. Both influences result in a higher flood frequency during past cold periods. Atlantic influences seem to result in more frequent high-intensity flood events during past warm periods, suggesting an increase in flood intensity under the global warming. However, no high-intensity events occurred during the 20th century.
C. S. M. Turney, R. T. Jones, C. Fogwill, J. Hatton, A. N. Williams, A. Hogg, Z. A. Thomas, J. Palmer, S. Mooney, and R. W. Reimer
Clim. Past, 12, 189–200,Short summary
Southern Hemisphere westerly airflow is considered a major driver of Southern Ocean and global climate. Observational records, however, are limited. Here we present a new Falkland Islands record that exploits "exotic" South America pollen and charcoal to reconstruct changing airflow. We find stronger winds 2000–1000 cal. yr BP, associated with increased burning, and a 250-year periodicity, suggesting solar forcing. Our results have important implications for understanding late Holocene climates.
J. F. Donges, R. V. Donner, N. Marwan, S. F. M. Breitenbach, K. Rehfeld, and J. Kurths
Clim. Past, 11, 709–741,Short summary
Paleoclimate records from cave deposits allow the reconstruction of Holocene dynamics of the Asian monsoon system, an important tipping element in Earth's climate. Employing recently developed techniques of nonlinear time series analysis reveals several robust and continental-scale regime shifts in the complexity of monsoonal variability. These regime shifts might have played an important role as drivers of migration, cultural change, and societal collapse during the past 10,000 years.
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Clim. Past, 8, 877–887,
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