Articles | Volume 13, issue 5
https://doi.org/10.5194/cp-13-491-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-13-491-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
19 May 2017
Research article |
| 19 May 2017
Decadal resolution record of Oman upwelling indicates solar forcing of the Indian summer monsoon (9–6 ka)
Philipp M. Munz
CORRESPONDING AUTHOR
Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP) at the University of Tübingen, Hölderlinstr. 12, 72074 Tübingen, Germany
Department of Geosciences, University of Tübingen, Hölderlinstr. 12, 72074 Tübingen, Germany
Stephan Steinke
Department of Geological Oceanography, Xiamen University, Xiping Building, Xiang'an South Road, Xiamen 361102, China
Anna Böll
Institute of Geology, University of Hamburg, Bundesstr. 55, 20146 Hamburg, Germany
Andreas Lückge
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Stilleweg 2, 30655 Hannover, Germany
Jeroen Groeneveld
MARUM – Center for Marine Environmental Sciences, Germany, Leobener Str., 28359 Bremen, Germany
Michal Kucera
MARUM – Center for Marine Environmental Sciences, Germany, Leobener Str., 28359 Bremen, Germany
Hartmut Schulz
Department of Geosciences, University of Tübingen, Hölderlinstr. 12, 72074 Tübingen, Germany
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Nicole Burdanowitz, Gerhard Schmiedl, Birgit Gaye, Philipp M. Munz, and Hartmut Schulz
Biogeosciences, 21, 1477–1499, https://doi.org/10.5194/bg-21-1477-2024, https://doi.org/10.5194/bg-21-1477-2024, 2024
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We analyse benthic foraminifera, nitrogen isotopes and lipids in a sediment core from the Gulf of Oman to investigate how the oxygen minimum zone (OMZ) and bottom water (BW) oxygenation have reacted to climatic changes since 43 ka. The OMZ and BW deoxygenation was strong during the Holocene, but the OMZ was well ventilated during the LGM period. We found an unstable mode of oscillating oxygenation states, from moderately oxygenated in cold stadials to deoxygenated in warm interstadials in MIS 3.
Babette Hoogakker, Catherine Davis, Yi Wang, Stepanie Kusch, Katrina Nilsson-Kerr, Dalton Hardisty, Allison Jacobel, Dharma Reyes Macaya, Nicolaas Glock, Sha Ni, Julio Sepúlveda, Abby Ren, Alexandra Auderset, Anya Hess, Katrina Meissner, Jorge Cardich, Robert Anderson, Christine Barras, Chandranath Basak, Harold Bradbury, Inda Brinkmann, Alexis Castillo, Madelyn Cook, Kassandra Costa, Constance Choquel, Paula Diz, Jonas Donnenfield, Felix Elling, Zeynep Erdem, Helena Filipsson, Sebastian Garrido, Julia Gottschalk, Anjaly Govindankutty Menon, Jeroen Groeneveld, Christian Hallman, Ingrid Hendy, Rick Hennekam, Wanyi Lu, Jean Lynch-Stieglitz, Lelia Matos, Alfredo Martínez-García, Giulia Molina, Práxedes Muñoz, Simone Moretti, Jennifer Morford, Sophie Nuber, Svetlana Radionovskaya, Morgan Raven, Christopher Somes, Anja Studer, Kazuyo Tachikawa, Raúl Tapia, Martin Tetard, Tyler Vollmer, Shuzhuang Wu, Yan Zhang, Xin-Yuan Zheng, and Yuxin Zhou
EGUsphere, https://doi.org/10.5194/egusphere-2023-2981, https://doi.org/10.5194/egusphere-2023-2981, 2024
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Paleo-oxygen proxies can extend current records, bound pre-anthropogenic baselines, provide datasets necessary to test climate models under different boundary conditions, and ultimately understand how ocean oxygenation responds on longer timescales. Here we summarize current proxies used for the reconstruction of Cenozoic seawater oxygen levels. This includes an overview of the proxy's history, how it works, resources required, limitations, and future recommendations.
Werner Ehrmann, Paul A. Wilson, Helge W. Arz, Hartmut Schulz, and Gerhard Schmiedl
Clim. Past, 20, 37–52, https://doi.org/10.5194/cp-20-37-2024, https://doi.org/10.5194/cp-20-37-2024, 2024
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Climatic and associated hydrological changes controlled the aeolian versus fluvial transport processes and the composition of the sediments in the central Red Sea through the last ca. 200 kyr. We identify source areas of the mineral dust and pulses of fluvial discharge based on high-resolution grain size, clay mineral, and geochemical data, together with Nd and Sr isotope data. We provide a detailed reconstruction of changes in aridity/humidity.
Sabrina Hohmann, Michal Kucera, and Anne de Vernal
Clim. Past, 19, 2027–2051, https://doi.org/10.5194/cp-19-2027-2023, https://doi.org/10.5194/cp-19-2027-2023, 2023
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Drivers for dinocyst assemblage compositions differ regionally and through time. Shifts in the assemblages can sometimes only be interpreted robustly by locally and sometimes globally calibrated transfer functions, questioning the reliability of environmental reconstructions. We suggest the necessity of a thorough evaluation of transfer function performance and significance for downcore applications to disclose the drivers for present and fossil dinocyst assemblages in a studied core location.
Michal Kučera and Geert-Jan A. Brummer
J. Micropalaeontol., 42, 33–34, https://doi.org/10.5194/jm-42-33-2023, https://doi.org/10.5194/jm-42-33-2023, 2023
Pauline Cornuault, Thomas Westerhold, Heiko Pälike, Torsten Bickert, Karl-Heinz Baumann, and Michal Kucera
Biogeosciences, 20, 597–618, https://doi.org/10.5194/bg-20-597-2023, https://doi.org/10.5194/bg-20-597-2023, 2023
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We generated high-resolution records of carbonate accumulation rate from the Miocene to the Quaternary in the tropical Atlantic Ocean to characterize the variability in pelagic carbonate production during warm climates. It follows orbital cycles, responding to local changes in tropical conditions, as well as to long-term shifts in climate and ocean chemistry. These changes were sufficiently large to play a role in the carbon cycle and global climate evolution.
Franziska Tell, Lukas Jonkers, Julie Meilland, and Michal Kucera
Biogeosciences, 19, 4903–4927, https://doi.org/10.5194/bg-19-4903-2022, https://doi.org/10.5194/bg-19-4903-2022, 2022
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This study analyses the production of calcite shells formed by one of the main Arctic pelagic calcifiers, the foraminifera N. pachyderma. Using vertically resolved profiles of shell concentration, size and weight, we show that calcification occurs throughout the upper 300 m with an average production flux below the calcification zone of 8 mg CaCO3 m−2 d−1 representing 23 % of the total pelagic biogenic carbonate production. The production flux is attenuated in the twilight zone by dissolution.
Raúl Tapia, Sze Ling Ho, Hui-Yu Wang, Jeroen Groeneveld, and Mahyar Mohtadi
Biogeosciences, 19, 3185–3208, https://doi.org/10.5194/bg-19-3185-2022, https://doi.org/10.5194/bg-19-3185-2022, 2022
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We report census counts of planktic foraminifera in depth-stratified plankton net samples off Indonesia. Our results show that the vertical distribution of foraminifera species routinely used in paleoceanographic reconstructions varies in hydrographically distinct regions, likely in response to food availability. Consequently, the thermal gradient based on mixed layer and thermocline dwellers also differs for these regions, suggesting potential implications for paleoceanographic reconstructions.
Geert-Jan A. Brummer and Michal Kučera
J. Micropalaeontol., 41, 29–74, https://doi.org/10.5194/jm-41-29-2022, https://doi.org/10.5194/jm-41-29-2022, 2022
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To aid researchers working with living planktonic foraminifera, we provide a comprehensive review of names that we consider appropriate for extant species. We discuss the reasons for the decisions we made and provide a list of species and genus-level names as well as other names that have been used in the past but are considered inappropriate for living taxa, stating the reasons.
Lukas Jonkers, Geert-Jan A. Brummer, Julie Meilland, Jeroen Groeneveld, and Michal Kucera
Clim. Past, 18, 89–101, https://doi.org/10.5194/cp-18-89-2022, https://doi.org/10.5194/cp-18-89-2022, 2022
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The variability in the geochemistry among individual foraminifera is used to reconstruct seasonal to interannual climate variability. This method requires that each foraminifera shell accurately records environmental conditions, which we test here using a sediment trap time series. Even in the absence of environmental variability, planktonic foraminifera display variability in their stable isotope ratios that needs to be considered in the interpretation of individual foraminifera data.
Lukas Jonkers, Oliver Bothe, and Michal Kucera
Clim. Past, 17, 2577–2581, https://doi.org/10.5194/cp-17-2577-2021, https://doi.org/10.5194/cp-17-2577-2021, 2021
Julie Meilland, Michael Siccha, Maike Kaffenberger, Jelle Bijma, and Michal Kucera
Biogeosciences, 18, 5789–5809, https://doi.org/10.5194/bg-18-5789-2021, https://doi.org/10.5194/bg-18-5789-2021, 2021
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Planktonic foraminifera population dynamics has long been assumed to be controlled by synchronous reproduction and ontogenetic vertical migration (OVM). Due to contradictory observations, this concept became controversial. We here test it in the Atlantic ocean for four species of foraminifera representing the main clades. Our observations support the existence of synchronised reproduction and OVM but show that more than half of the population does not follow the canonical trajectory.
Andrew M. Dolman, Torben Kunz, Jeroen Groeneveld, and Thomas Laepple
Clim. Past, 17, 825–841, https://doi.org/10.5194/cp-17-825-2021, https://doi.org/10.5194/cp-17-825-2021, 2021
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Uncertainties in climate proxy records are temporally autocorrelated. By deriving expressions for the power spectra of errors in proxy records, we can estimate appropriate uncertainties for any timescale, for example, for temporally smoothed records or for time slices. Here we outline and demonstrate this approach for climate proxies recovered from marine sediment cores.
Markus Raitzsch, Jelle Bijma, Torsten Bickert, Michael Schulz, Ann Holbourn, and Michal Kučera
Clim. Past, 17, 703–719, https://doi.org/10.5194/cp-17-703-2021, https://doi.org/10.5194/cp-17-703-2021, 2021
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At approximately 14 Ma, the East Antarctic Ice Sheet expanded to almost its current extent, but the role of CO2 in this major climate transition is not entirely known. We show that atmospheric CO2 might have varied on 400 kyr cycles linked to the eccentricity of the Earth’s orbit. The resulting change in weathering and ocean carbon cycle affected atmospheric CO2 in a way that CO2 rose after Antarctica glaciated, helping to stabilize the climate system on its way to the “ice-house” world.
Annette Hahn, Enno Schefuß, Jeroen Groeneveld, Charlotte Miller, and Matthias Zabel
Clim. Past, 17, 345–360, https://doi.org/10.5194/cp-17-345-2021, https://doi.org/10.5194/cp-17-345-2021, 2021
Catarina Cavaleiro, Antje H. L. Voelker, Heather Stoll, Karl-Heinz Baumann, and Michal Kucera
Clim. Past, 16, 2017–2037, https://doi.org/10.5194/cp-16-2017-2020, https://doi.org/10.5194/cp-16-2017-2020, 2020
Douglas Lessa, Raphaël Morard, Lukas Jonkers, Igor M. Venancio, Runa Reuter, Adrian Baumeister, Ana Luiza Albuquerque, and Michal Kucera
Biogeosciences, 17, 4313–4342, https://doi.org/10.5194/bg-17-4313-2020, https://doi.org/10.5194/bg-17-4313-2020, 2020
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We observed that living planktonic foraminifera had distinct vertically distributed communities across the Subtropical South Atlantic. In addition, a hierarchic alternation of environmental parameters was measured to control the distribution of planktonic foraminifer's species depending on the water depth. This implies that not only temperature but also productivity and subsurface processes are signed in fossil assemblages, which could be used to perform paleoceanographic reconstructions.
Lukas Jonkers, Olivier Cartapanis, Michael Langner, Nick McKay, Stefan Mulitza, Anne Strack, and Michal Kucera
Earth Syst. Sci. Data, 12, 1053–1081, https://doi.org/10.5194/essd-12-1053-2020, https://doi.org/10.5194/essd-12-1053-2020, 2020
Anna Jentzen, Joachim Schönfeld, Agnes K. M. Weiner, Manuel F. G. Weinkauf, Dirk Nürnberg, and Michal Kučera
J. Micropalaeontol., 38, 231–247, https://doi.org/10.5194/jm-38-231-2019, https://doi.org/10.5194/jm-38-231-2019, 2019
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The study assessed the population dynamics of living planktic foraminifers on a weekly, seasonal, and interannual timescale off the coast of Puerto Rico to improve our understanding of short- and long-term variations. The results indicate a seasonal change of the faunal composition, and over the last decades. Lower standing stocks and lower stable carbon isotope values of foraminifers in shallow waters can be linked to the hurricane Sandy, which passed the Greater Antilles during autumn 2012.
Mariem Saavedra-Pellitero, Karl-Heinz Baumann, Miguel Ángel Fuertes, Hartmut Schulz, Yann Marcon, Nele Manon Vollmar, José-Abel Flores, and Frank Lamy
Biogeosciences, 16, 3679–3702, https://doi.org/10.5194/bg-16-3679-2019, https://doi.org/10.5194/bg-16-3679-2019, 2019
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Open ocean phytoplankton include coccolithophore algae, a key element in carbon cycle regulation with important feedbacks to the climate system. We document latitudinal variability in both coccolithophore assemblage and the mass variation in one particular species, Emiliania huxleyi, for a transect across the Drake Passage (in the Southern Ocean). Coccolithophore abundance, diversity and maximum depth habitat decrease southwards, coinciding with changes in the predominant E. huxleyi morphotypes.
Mattia Greco, Lukas Jonkers, Kerstin Kretschmer, Jelle Bijma, and Michal Kucera
Biogeosciences, 16, 3425–3437, https://doi.org/10.5194/bg-16-3425-2019, https://doi.org/10.5194/bg-16-3425-2019, 2019
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To be able to interpret the paleoecological signal contained in N. pachyderma's shells, its habitat depth must be known. Our investigation on 104 density profiles of this species from the Arctic and North Atlantic shows that specimens reside closer to the surface when sea-ice and/or surface chlorophyll concentrations are high. This is in contrast with previous investigations that pointed at the position of the deep chlorophyll maximum as the main driver of N. pachyderma vertical distribution.
Haruka Takagi, Katsunori Kimoto, Tetsuichi Fujiki, Hiroaki Saito, Christiane Schmidt, Michal Kucera, and Kazuyoshi Moriya
Biogeosciences, 16, 3377–3396, https://doi.org/10.5194/bg-16-3377-2019, https://doi.org/10.5194/bg-16-3377-2019, 2019
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Photosymbiosis (endosymbiosis with algae) is an evolutionary important ecology for many marine organisms but has poorly been identified among planktonic foraminifera. In this study, we identified and characterized photosymbiosis of various species of planktonic foraminifera by focusing on their photosynthesis–related features. We finally proposed a new framework showing a potential strength of photosymbiosis, which will serve as a basis for future ecological studies of planktonic foraminifera.
Andreia Rebotim, Antje Helga Luise Voelker, Lukas Jonkers, Joanna J. Waniek, Michael Schulz, and Michal Kucera
J. Micropalaeontol., 38, 113–131, https://doi.org/10.5194/jm-38-113-2019, https://doi.org/10.5194/jm-38-113-2019, 2019
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To reconstruct subsurface water conditions using deep-dwelling planktonic foraminifera, we must fully understand how the oxygen isotope signal incorporates into their shell. We report δ18O in four species sampled in the eastern North Atlantic with plankton tows. We assess the size and crust effect on the isotopic δ18O and compared them with predictions from two equations. We reveal different patterns of calcite addition with depth, highlighting the need to perform species-specific calibrations.
Lukas Jonkers and Michal Kučera
Clim. Past, 15, 881–891, https://doi.org/10.5194/cp-15-881-2019, https://doi.org/10.5194/cp-15-881-2019, 2019
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Fossil plankton assemblages have been widely used to reconstruct SST. In such approaches, full taxonomic resolution is often used. We assess whether this is required for reliable reconstructions as some species may not respond to SST. We find that only a few species are needed for low reconstruction errors but that species selection has a pronounced effect on reconstructions. We suggest that the sensitivity of a reconstruction to species pruning can be used as a measure of its robustness.
Nadia Al-Sabouni, Isabel S. Fenton, Richard J. Telford, and Michal Kučera
J. Micropalaeontol., 37, 519–534, https://doi.org/10.5194/jm-37-519-2018, https://doi.org/10.5194/jm-37-519-2018, 2018
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In this study we investigate consistency in species-level identifications and whether disagreements are predictable. Overall, 21 researchers from across the globe identified sets of 300 specimens or digital images of planktonic foraminifera. Digital identifications tended to be more disparate. Participants trained by the same person often had more similar identifications. Disagreements hardly affected transfer-function temperature estimates but produced larger differences in diversity metrics.
Jeroen Groeneveld, Helena L. Filipsson, William E. N. Austin, Kate Darling, David McCarthy, Nadine B. Quintana Krupinski, Clare Bird, and Magali Schweizer
J. Micropalaeontol., 37, 403–429, https://doi.org/10.5194/jm-37-403-2018, https://doi.org/10.5194/jm-37-403-2018, 2018
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Current climate and environmental changes strongly affect shallow marine and coastal areas like the Baltic Sea. The combination of foraminiferal geochemistry and environmental parameters demonstrates that in a highly variable setting like the Baltic Sea, it is possible to separate different environmental impacts on the foraminiferal assemblages and therefore use chemical factors to reconstruct how seawater temperature, salinity, and oxygen varied in the past and may vary in the future.
Kerstin Kretschmer, Lukas Jonkers, Michal Kucera, and Michael Schulz
Biogeosciences, 15, 4405–4429, https://doi.org/10.5194/bg-15-4405-2018, https://doi.org/10.5194/bg-15-4405-2018, 2018
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The fossil shells of planktonic foraminifera are widely used to reconstruct past climate conditions. To do so, information about their seasonal and vertical habitat is needed. Here we present an updated version of a planktonic foraminifera model to better understand species-specific habitat dynamics under climate change. This model produces spatially and temporally coherent distribution patterns, which agree well with available observations, and can thus aid the interpretation of proxy records.
Birgit Gaye, Anna Böll, Joachim Segschneider, Nicole Burdanowitz, Kay-Christian Emeis, Venkitasubramani Ramaswamy, Niko Lahajnar, Andreas Lückge, and Tim Rixen
Biogeosciences, 15, 507–527, https://doi.org/10.5194/bg-15-507-2018, https://doi.org/10.5194/bg-15-507-2018, 2018
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The Arabian Sea has one of the most severe oxygen minima of the world's oceans between about 100 and 1200 m of water depth and is therefore a major oceanic nitrogen sink. Stable nitrogen isotopic ratios in sediments record changes in oxygen concentrations and were studied for the last 25 kyr. Oxygen concentrations dropped at the end of the last glacial and became further reduced during the Holocene, probably due to the increasing age of the low-oxygen water mass.
Ulrich Kotthoff, Jeroen Groeneveld, Jeanine L. Ash, Anne-Sophie Fanget, Nadine Quintana Krupinski, Odile Peyron, Anna Stepanova, Jonathan Warnock, Niels A. G. M. Van Helmond, Benjamin H. Passey, Ole Rønø Clausen, Ole Bennike, Elinor Andrén, Wojciech Granoszewski, Thomas Andrén, Helena L. Filipsson, Marit-Solveig Seidenkrantz, Caroline P. Slomp, and Thorsten Bauersachs
Biogeosciences, 14, 5607–5632, https://doi.org/10.5194/bg-14-5607-2017, https://doi.org/10.5194/bg-14-5607-2017, 2017
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We present reconstructions of paleotemperature, paleosalinity, and paleoecology from the Little Belt (Site M0059) over the past ~ 8000 years and evaluate the applicability of numerous proxies. Conditions were lacustrine until ~ 7400 cal yr BP. A transition to brackish–marine conditions then occurred within ~ 200 years. Salinity proxies rarely allowed quantitative estimates but revealed congruent results, while quantitative temperature reconstructions differed depending on the proxies used.
Julie Lattaud, Denise Dorhout, Hartmut Schulz, Isla S. Castañeda, Enno Schefuß, Jaap S. Sinninghe Damsté, and Stefan Schouten
Clim. Past, 13, 1049–1061, https://doi.org/10.5194/cp-13-1049-2017, https://doi.org/10.5194/cp-13-1049-2017, 2017
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The study of past sedimentary records from coastal margins allows us to reconstruct variations in terrestrial input into the marine realm and to gain insight into continental climatic variability. The study of two sediment cores close to river mouths allowed us to show the potential of long-chain diols as riverine input proxy.
Raphaël Morard, Franck Lejzerowicz, Kate F. Darling, Béatrice Lecroq-Bennet, Mikkel Winther Pedersen, Ludovic Orlando, Jan Pawlowski, Stefan Mulitza, Colomban de Vargas, and Michal Kucera
Biogeosciences, 14, 2741–2754, https://doi.org/10.5194/bg-14-2741-2017, https://doi.org/10.5194/bg-14-2741-2017, 2017
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The exploitation of deep-sea sedimentary archive relies on the recovery of mineralized skeletons of pelagic organisms. Planktonic groups leaving preserved remains represent only a fraction of the total marine diversity. Environmental DNA left by non-fossil organisms is a promising source of information for paleo-reconstructions. Here we show how planktonic-derived environmental DNA preserves ecological structure of planktonic communities. We use planktonic foraminifera as a case study.
Lukas Jonkers and Michal Kučera
Clim. Past, 13, 573–586, https://doi.org/10.5194/cp-13-573-2017, https://doi.org/10.5194/cp-13-573-2017, 2017
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Planktonic foraminifera – the most important proxy carriers in palaeoceanography – adjust their seasonal and vertical habitat. They are thought to do so in a way that minimises the change in their environment, implying that proxy records based on these organisms may not capture the full amplitude of past climate change. Here we demonstrate that they indeed track a particular thermal habitat and suggest that this could lead to a 40 % underestimation of reconstructed temperature change.
Andreia Rebotim, Antje H. L. Voelker, Lukas Jonkers, Joanna J. Waniek, Helge Meggers, Ralf Schiebel, Igaratza Fraile, Michael Schulz, and Michal Kucera
Biogeosciences, 14, 827–859, https://doi.org/10.5194/bg-14-827-2017, https://doi.org/10.5194/bg-14-827-2017, 2017
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Planktonic foraminifera species depth habitat remains poorly constrained and the existing conceptual models are not sufficiently tested by observational data. Here we present a synthesis of living planktonic foraminifera abundance data in the subtropical eastern North Atlantic from vertical plankton tows. We also test potential environmental factors influencing the species depth habitat and investigate yearly or lunar migration cycles. These findings may impact paleoceanographic studies.
Werner Ehrmann, Gerhard Schmiedl, Martin Seidel, Stefan Krüger, and Hartmut Schulz
Clim. Past, 12, 713–727, https://doi.org/10.5194/cp-12-713-2016, https://doi.org/10.5194/cp-12-713-2016, 2016
C. L. McKay, J. Groeneveld, H. L. Filipsson, D. Gallego-Torres, M. J. Whitehouse, T. Toyofuku, and O.E. Romero
Biogeosciences, 12, 5415–5428, https://doi.org/10.5194/bg-12-5415-2015, https://doi.org/10.5194/bg-12-5415-2015, 2015
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We highlight the proxy potential of foraminiferal Mn/Ca determined by secondary ion mass spectrometry and flow-through inductively coupled plasma optical emission spectroscopy for recording changes in bottom-water oxygen conditions. Comparisons with Mn sediment bulk measurements from the same sediment core largely agree with the results. High foraminiferal Mn/Ca occurs in samples from times of high productivity export and corresponds with the benthic foraminiferal faunal composition.
L. Jonkers and M. Kučera
Biogeosciences, 12, 2207–2226, https://doi.org/10.5194/bg-12-2207-2015, https://doi.org/10.5194/bg-12-2207-2015, 2015
I. Hessler, S. P. Harrison, M. Kucera, C. Waelbroeck, M.-T. Chen, C. Anderson, A. de Vernal, B. Fréchette, A. Cloke-Hayes, G. Leduc, and L. Londeix
Clim. Past, 10, 2237–2252, https://doi.org/10.5194/cp-10-2237-2014, https://doi.org/10.5194/cp-10-2237-2014, 2014
H. Schulz and U. von Rad
Biogeosciences, 11, 3107–3120, https://doi.org/10.5194/bg-11-3107-2014, https://doi.org/10.5194/bg-11-3107-2014, 2014
A. J. Enge, U. Witte, M. Kucera, and P. Heinz
Biogeosciences, 11, 2017–2026, https://doi.org/10.5194/bg-11-2017-2014, https://doi.org/10.5194/bg-11-2017-2014, 2014
M. F. G. Weinkauf, T. Moller, M. C. Koch, and M. Kučera
Biogeosciences, 10, 6639–6655, https://doi.org/10.5194/bg-10-6639-2013, https://doi.org/10.5194/bg-10-6639-2013, 2013
Y. Milker, R. Rachmayani, M. F. G. Weinkauf, M. Prange, M. Raitzsch, M. Schulz, and M. Kučera
Clim. Past, 9, 2231–2252, https://doi.org/10.5194/cp-9-2231-2013, https://doi.org/10.5194/cp-9-2231-2013, 2013
J. Groeneveld and H. L. Filipsson
Biogeosciences, 10, 5125–5138, https://doi.org/10.5194/bg-10-5125-2013, https://doi.org/10.5194/bg-10-5125-2013, 2013
R. J. Telford, C. Li, and M. Kucera
Clim. Past, 9, 859–870, https://doi.org/10.5194/cp-9-859-2013, https://doi.org/10.5194/cp-9-859-2013, 2013
Cited articles
Anand, P., Kroon, D., Singh, A. D., and Ganssen, G.: Coupled sea surface temperature-seawater δ18O reconstructions in the Arabian Sea at the millennial scale for the last 35 ka, Paleoceanography, 23, PA4207, https://doi.org/10.1029/2007PA001564, 2008.
Anderson, D. M., Overpeck, J. T., and Gupta, A. K.: Increase in the Asian Southwest Monsoon During the Past Four Centuries, Science, 297, 596–599, 2002.
Attolini, M. R., Cecchini, S., Galli, M., and Nanni, T.: On the persistence of the 22 y solar cycle, Sol. Phys., 125, 389–398, 1990.
Bard, E.: Comparison of alkenone estimates with other paleotemperature proxies, Geochem. Geophy. Geosy., 2, 1002, https://doi.org/10.1029/2000GC000050, 2001.
Barker, S., Greaves, M., and Elderfield, H.: A study of cleaning procedures used for foraminiferal Mg ∕ Ca paleothermometry, Geochem. Geophys. Geosy., 4, 8407, https://doi.org/10.1029/2003GC000559, 2003.
Bé, A.: Foraminifera families: Globigerinidae and Globorotalidae, in: Fiches d'Identification du Zooplankton. Sheet 108, edited by: Fraser, J. H., 1–8, Conseil Perm. Internat. Explor. Mer, Charlottenlund, Denmark, 1967.
Bé, A. and Hutson, W. H.: Ecology of planktonic foraminifera and biogeographic patterns of life and fossil assemblages in the Indian Ocean, Micropaleontology, 23, 369–414, https://doi.org/10.2307/1485406, 1977.
Berger, A. L.: Long-term variations of daily insolation and Quaternary climatic changes, J. Atmos. Sci., 35, 2362–2367, 1978.
Berger, W. H.: Deep-sea carbonate: Pteropod distribution and the aragonite compensation depth, Deep-Sea Res., 25, 447–452, 1978.
Berger, W. H. and von Rad, U.: Decadal to millennial cyclicity in varves and turbidites from the Arabian Sea: hypothesis of tidal origin, Global Planet. Change, 34, 313–325, 2002.
Berkelhammer, M., Sinha, A., Mudelsee, M., Cheng, H., Edwards, R. L., and Cannariato, K.: Persistent multidecadal power of the Indian Summer Monsoon, Earth Planet. Sc. Lett., 290, 166–172, https://doi.org/10.1016/j.epsl.2009.12.017, 2010.
Birks, H.: Numerical tools in palaeolimnology–Progress, potentialities, and problems, J. Paleolimnol., 20, 307–322, 1998.
Blaauw, M.: Methods and code for 'classical'age-modelling of radiocarbon sequences, Quaternary Geochronol., 5, 512–518, 2010.
Bohrmann, G., Lahajnar, N., Gaye, B., Spiess, V., and Betzler, C.: Nitrogen Cycle, Cold Seeps, Carbonate Platform Development in the Northwestern Indian Ocean, Cruise No.74, 31 August–22 December 2007, University of Hamburg, 2010.
Böll, A.: Reconstruction of the Holocene monsoon climate variability in the Arabian Sea based on alkenone sea surface temperature, primary productivity and denitrification proxies, Ph.D. thesis, University of Hamburg, 2014.
Bond, G., Kromer, B., Beer, J., Muscheler, R., Evans, M. N., Showers, W., Hoffmann, S., Lotti-Bond, R., Hajdas, I., and Bonani, G.: Persistent solar influence on North Atlantic climate during the Holocene., Science, 294, 2130–2136, 2001.
Böning, P. and Bard, E.: Millennial/centennial-scale thermocline ventilation changes in the Indian Ocean as reflected by aragonite preservation and geochemical variations in Arabian Sea sediments, Geochim. Cosmochim. Ac., 73, 6771–6788, 2009.
Böning, P., Brumsack, H. J., and Böttcher, M. E.: Geochemistry of Peruvian near-surface sediments, Geochim. Cosmochim. Ac., 68, 4429–4451, 2004.
Brown, S. J. and Elderfield, H.: Variations in Mg ∕ Ca and Sr/Ca ratios of planktonic foraminifera caused by postdepositional dissolution: Evidence of shallow Mg-dependent dissolution, Paleoceanography, 11, 543–551, 1996.
Burns, S. J., Fleitmann, D., Mudelsee, M., Neff, U., Matter, A., and Mangini, A.: A 780-year annually resolved record of Indian Ocean monsoon precipitation from a speleothem from south Oman, J. Geophys. Res., 107, 4434, https://doi.org/10.1029/2001JD001281, 2002.
Calvert, S. E. and Pedersen, T. F.: Geochemistry of Recent oxic and anoxic marine sediments: Implications for the geological record, Mar. Geol., 113, 67–88, 1993.
Calvert, S. E., Bustin, R. M., and Ingall, E. D.: Influence of water column anoxia and sediment supply on the burial and preservation of organic carbon in marine shales, Geochim. Cosmochim. Ac., 60, 1577–1593, 1996.
Cayre, O. and Bard, E.: Planktonic foraminiferal and alkenone records of the last deglaciation from the Eastern Arabian Sea, Quaternary Res., 52, 337–342, 1999.
Clemens, S., Prell, W., Murray, D., Shimmield, G., and Weedon, G.: Forcing Mechanisms of the Indian-Ocean Monsoon, Nature, 353, 720–725, 1991.
Conan, S. and Brummer, G.: Fluxes of planktic foraminifera in response to monsoonal upwelling on the Somalia Basin margin, Deep-Sea Res. Pt. II, 47, 2207–2227, 2000.
Conan, S. M. H., Ivanova, E. M., and Brummer, G. J. A.: Quantifying carbonate dissolution and calibration of foraminiferal dissolution indices in the Somali Basin, Mar. Geol., 182, 325–349, 2002.
Conkright, M. E., Levitus, S., OBrien, T., Boyer, T. P., Stephens, C., Johnosn, D., Stathoplos, L., Baranova, O., Antonov, J., Gelfeld, R., Burney, J., Rochester, J., and Forgy, C.: World Ocean Database 1998 Documentation and Quality Control, Silver SPring, MD, 1998.
Conley, D. J.: An interlaboratory comparison for the measurement of biogenic silica in sediments, Mar. Chem., 63, 39–48, 1998.
Courtney, M. and Gordon, M.: Determining the number of factors to retain in EFA: Using the SPSS R-Menu v2. 0 to make more judicious estimations, Practical Assessment, 18, 2013.
Curry, W. B., Ostermann, D. R., Guptha, M. V. S., and Ittekkot, V.: Foraminiferal production and monsoonal upwelling in the Arabian Sea: evidence from sediment traps, in: Upwelling Systems Evolution Since the Early Miocene, edited by: Summerhayes, C. P., Prell, W. L., and Emeis, K. C., 93–106, London, 1992.
Dahl, K. A. and Oppo, D. W.: Sea surface temperature pattern reconstructions in the Arabian Sea, Paleoceanography, 21, PA1014, https://doi.org/10.1029/2005PA001162, 2006.
Dekens, P. S., Lea, D. W., Pak, D. K., and Spero, H. J.: Core top calibration of Mg ∕ Ca in tropical foraminifera: Refining paleotemperature estimation, Geochem. Geophy. Geosy., 3, 1–29, 2002.
DeMaster, D. J.: The supply and accumulation of silica in the marine environment, Geochim. Cosmochim. Ac., 45, 1715–1732, 1981.
Deplazes, G., Lückge, A., Peterson, L. C., Timmermann, A., Hamann, Y., Hughen, K. A., Röhl, U., Laj, C., Cane, M. A., Sigman, D. M., and Haug, G. H.: Links between tropical rainfall and North Atlantic climate during the last glacial period, Nat, Geosci., 6, 213–217, https://doi.org/10.1038/ngeo1712, 2013.
Duan, F., Wang, Y., Shen, C.-C., Wang, Y., Cheng, H., Wu, C.-C., Hu, H.-M., Kong, X., Liu, D., and Zhao, K.: Evidence for solar cycles in a late Holocene speleothem record from Dongge Cave, China., Scientific Reports, 4, 5159, https://doi.org/10.1038/srep05159, 2014.
Dykoski, C. A., Edwards, R. L., Cheng, H., Yuan, D., Cai, Y., Zhang, M., Lin, Y., Qing, J., An, Z., and Revenaugh, J.: A high-resolution, absolute-dated Holocene and deglacial Asian monsoon record from Dongge Cave, China, Earth Planet. Sc. Lett., 233, 71–86, 2005.
Elderfield, H. and Ganssen, G.: Past temperature and delta18O of surface ocean waters inferred from foraminiferal Mg ∕ Ca ratios, Nature, 405, 442–445, 2000.
Emeis, K.-C., Anderson, D. M., Kroon, D., and Schulz-Bull, D.: Sea-surface temperatures and history of monsoon upwelling in the Northeastern Arabian Sea during the last 500,000 years, Quaternary Res., 43, 355–361, 1995.
Emerson, S. R. and Huested, S. S.: Ocean anoxia and the concentrations of molybdenum and vanadium in seawater, Mar. Chem., 34, 177–196, 1991.
Emery, W. J. and Meincke, J.: Global Water Masses – Summary and Review, Oceanol. Acta, 9, 383–391, 1986.
Fairbanks, R. G., Sverdlove, M., Free, R., Wiebe, P. H., and Bé, A.: Vertical-Distribution and Isotopic Fractionation of Living Planktonic-Foraminifera From the Panama Basin, Nature, 298, 841–844, 1982.
Farías, L., Fernández, C., Faúndez, J., Cornejo, M., and Alcaman, M. E.: Chemolithoautotrophic production mediating the cycling of the greenhouse gases N2O and CH4 in an upwelling ecosystem, Biogeosciences, 6, 3053–3069, https://doi.org/10.5194/bg-6-3053-2009, 2009.
Findlater, J.: A major low-level air current near the Indian Ocean during the northern summer, Q. J. Roy. Meteor. Soc., 95, 362–380, 1969.
Fleitmann, D., Burns, S. J., Mudelsee, M., Neff, U., Kramers, J., Mangini, A., and Matter, A.: Holocene forcing of the Indian monsoon recorded in a stalagmite from Southern Oman, Science, 300, 1737–1739, 2003.
Fleitmann, D., Burns, S. J., Neff, U., Mudelsee, M., Mangini, A., and Matter, A.: Palaeoclimatic interpretation of high-resolution oxygen isotope profiles derived from annually laminated speleothems from Southern Oman, Quaternary Sci. Rev., 23, 935–945, 2004.
Fleitmann, D., Burns, S. J., Mangini, A., and Mudelsee, M.: Holocene ITCZ and Indian monsoon dynamics recorded in stalagmites from Oman and Yemen (Socotra), Quaternary Sci. Rev., 26, 170–188, 2007.
Fontugne, M., Carre, M., Bentaleb, I., Julien, M., and Lavallee, D.: Radiocarbon reservoir age variations in the south Peruvian upwelling during the Holocene, Radiocarbon, 46, 531–537, 2004.
Friedrich, O., Schiebel, R., Wilson, P. A., and Weldeab, S.: Influence of test size, water depth, and ecology on Mg ∕ Ca, Sr/Ca, δ 18 O and δ 13 C in nine modern species of planktic foraminifers, Earth Planet Sc. Lett., 319–320, 133–145, 2012.
Ganssen, G. M., Peeters, F. J. C., Metcalfe, B., Anand, P., Jung, S. J. A., Kroon, D., and Brummer, G.-J. A.: Quantifying sea surface temperature ranges of the Arabian Sea for the past 20 000 years, Clim. Past, 7, 1337–1349, https://doi.org/10.5194/cp-7-1337-2011, 2011.
Garcia, H. E., Locarini, R. A., Boyer, T. P., and Antonov, J. I.: World Ocean Atlas 2009, Volume 3: Dissolved Oxygen, Apparent Oxygen Utilization and Oxygen Saturation, in: A. Mishonov Technical Ed., edited by: Levitus, S., p. 40, U.S. Government Printing Office, Washington D.C., 2010.
Ghil, M., Allen, M. R., Dettinger, M. D., Ide, K., Kondrashov, D., Mann, M. E., Robertson, A. W., Saunders, A., Tian, Y., Varadi, F., and Yiou, P.: Advanced spectral methods for climatic time series, Rev. Geophys., 40, 1–41, 2002.
Godad, S. P., Naidu, P. D., and Malmgren, B. A.: Sea surface temperature changes during May and August in the western Arabian Sea over the last 22kyr: Implications as to shifting of the upwelling season, Mar. Micropaleontol., 78, 25–29, 2011.
Greaves, M., Caillon, N., Rebaubier, H., Bartoli, G., Bohaty, S., Cacho, I., Clarke, L., Cooper, M., Daunt, C., Delaney, M., deMenocal, P., Dutton, A., Eggins, S., Elderfield, H., Garbe-Schoenberg, D., Goddard, E., Green, D., Groeneveld, J., Hastings, D., Hathorne, E., Kimoto, K., Klinkhammer, G., Labeyrie, L., Lea, D. W., Marchitto, T., Martínez-Botí, M. A., Mortyn, P. G., Ni, Y., Nuernberg, D., Paradis, G., Pena, L., Quinn, T., Rosenthal, Y., Russell, A., Sagawa, T., Sosdian, S., Stott, L., Tachikawa, K., Tappa, E., Thunell, R., and Wilson, P. A.: Interlaboratory comparison study of calibration standards for foraminiferal Mg ∕ Ca thermometry, Geochem. Geophy. Geosy., 9, Q08010, https://doi.org/10.1029/2008GC001974, 2008.
Grinsted, A., Moore, J. C., and Jevrejeva, S.: Application of the cross wavelet transform and wavelet coherence to geophysical time series, Nonlin. Processes Geophys., 11, 561–566, https://doi.org/10.5194/npg-11-561-2004, 2004.
Gupta, A. K., Anderson, D. M., and Overpeck, J. T.: Abrupt changes in the Asian southwest monsoon during the Holocene and their links to the North Atlantic Ocean, Nature, 421, 354–357, 2003.
Gupta, A. K., Das, M., and Anderson, D. M.: Solar influence on the Indian summer monsoon during the Holocene, Geophys. Res. Lett., 32, L17703, https://doi.org/10.1029/2005GL022685, 2005.
Gupta, A. K., Clemens, S. C., Das, M., and Mukherjee, B.: Benthic foraminiferal faunal and isotopic changes as recorded in Holocene sediments of the northwest Indian Ocean, Paleoceanography, 23, PA2214, https://doi.org/10.1029/2007PA001546, 2008.
Hemleben, C., Spindler, M., and Anderson, O. R.: Modern planktonic foraminifera, Springer Berlin Heidelberg, 1989.
Horn, J. L.: A rationale and test for the number of factors in factor analysis, Psychometrika, 30, 179–185, 1965.
Huguet, C., Kim, J.-H., Sinninghe Damsté, J. S., and Schouten, S.: Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX 86and U 37K'), Paleoceanography, 21, https://doi.org/10.1029/2005PA001215, 2006.
Hutson, W. H. and Prell, W. L.: A paleoecological transfer function, FI-2, for Indian Ocean planktonic foraminifera, J. Paleontol., 54, 381–399, 1980.
Imbrie, J. and Kipp, N. G. A.: New micropaleontologic method for quantitative paleoclimatology: application to Late Pleistocene Carribean core, in: The Late Cenozoic Glacial Ages, edited by: Turekian, K. K., 71–182, New Haven, Conn., 1971.
Juggins, S.: rioja: Analysis of Quaternary Science Data, R package version (0.8–7), 2015.
Jung, S., Kroon, D., Ganssen, G., and Peeters, F.: Enhanced Arabian Sea intermediate water flow during glacial North Atlantic cold phases, Earth Planet. Sc. Lett., 280, 220–228, 2009.
Jung, S. J. A., Ganssen, G. M., and Davies, G. R.: Multidecadal variations in the Early Holocene outflow of Red Sea water into the Arabian Sea, Paleoceanography, 16, 658–668, 2001.
Jung, S. J. A., Davies, G. R., Ganssen, G., and Kroon, D.: Decadal-centennial scale monsoon variations in the Arabian Sea during the Early Holocene, Geochem. Geophy. Geosy., 3, 1–10, 2002.
Kennett, D. J. and Kennett, J. P.: Influence of Holocene marine transgression and climate change on cultural evolution in southern Mesopotamia, in: Climate Change and Cultural Dynamics A Global Perspective on Mid-Holocene Transitions, edited by: Anderson, D. G., Maasch, K. A., and Sandweiss, D. H., Climate change and …, 2007.
Kucera, M., Weinelt, M., Kiefer, T., Pflaumann, U., Hayes, A., Weinelt, M., Chen, M.-T., Mix, A. C., Barrows, T. T., Cortijo, E., Duprat, J., Juggins, S., and Waelbroeck, C.: Reconstruction of sea-surface temperatures from assemblages of planktonic foraminifera: multi-technique approach based on geographically constrained calibration data sets and its application to glacial Atlantic and Pacific Oceans, Quaternary Sci. Rev., 24, 951–998, 2005.
Kuper, R. and Kröpelin, S.: Climate-Controlled Holocene Occupation in the Sahara: Motor of Africa's Evolution, Science, 313, 803–807, 2006.
Kutzbach, J. E. and Street-Perrott, F. A.: Milankovitch forcing of fluctuations in the level of tropical lakes from 18 to 0 kyr BP, Nature, 317, 130–134, 1985.
Le, J. and Shackleton, N. J.: Carbonate dissolution fluctuations in the western Equatorial Pacific during the late Quaternary, Paleoceanography, 7, 21–42, 1992.
Liu, Y.-H., Henderson, G. M., Hu, C.-Y., Mason, A. J., Charnley, N., Johnson, K. R., and Xie, S.-C.: Links between the East Asian monsoon and North Atlantic climate during the 8,200 year event, Nat. Geosci., 6, 117–120, 2013.
Locarnini, R. A., Mishonov, A. V., Antonov, J. I., Boyer, T. P., and Garcia, H. E.: World Ocean Atlas 2009, Volume 1: Temperature, in: A. Mishonov Technical Ed., edited by: Levitus, S., p. 40, U.S. Government Printing Office, Washington D.C., 2010.
Madhupratap, M., Prasanna Kumar, S., Bhattathiri, P. M. A., Dileep Kumar, M., Raghukumar, S., Nair, K. K. C., and Ramaiah, N.: Mechanism of the biological response to winter cooling in the northeastern Arabian Sea, Nature, 384, 549–552, 1996.
Mann, M. E. and Lees, J. M.: Robust estimation of background noise and signal detection in climatic time series, Climatic Change, 33, 409–445, 1996.
McKay, C. L., Groeneveld, J., Filipsson, H. L., Gallego-Torres, D., Whitehouse, M. J., Toyofuku, T., and Romero, O. E.: A comparison of benthic foraminiferal Mn ∕ Ca and sedimentary Mn ∕ Al as proxies of relative bottom-water oxygenation in the low-latitude NE Atlantic upwelling system, Biogeosciences, 12, 5415–5428, https://doi.org/10.5194/bg-12-5415-2015, 2015.
Menzel, P., Gaye, B., Mishra, P. K., Anoop, A., Basavaiah, N., Marwan, N., Plessen, B., Prasad, S., Riedel, N., Stebich, M., and Wiesner, M. G.: Linking Holocene drying trends from Lonar Lake in monsoonal central India to North Atlantic cooling events, Palaeogeogr. Palaeoclimatol. Palaeoecol., 410, 164–178, https://doi.org/10.1016/j.palaeo.2014.05.044, 2014.
Milliman, J. D., Troy, P. J., Balch, W. M., and Adams, A. K.: Biologically mediated dissolution of calcium carbonate above the chemical lysocline?, Deep-Sea Res. Pt. I, 46, 1653–1669, 1999.
Mohan, R., Verma, K., Mergulhao, L. P., Sinha, D. K., Shanvas, S., and Guptha, M. V. S.: Seasonal variation of pteropods from the Western Arabian Sea sediment trap, Geo-Mar. Lett., 26, 265–273, 2006.
Mohtadi, M., Oppo, D. W., Lückge, A., DePol-Holz, R., Steinke, S., Groeneveld, J., Hemme, N., and Hebbeln, D.: Reconstructing the thermal structure of the upper ocean: Insights from planktic foraminifera shell chemistry and alkenones in modern sediments of the tropical eastern Indian Ocean, Paleoceanography, 26, PA3219, https://doi.org/10.1029/2011PA002132, 2011.
Mohtadi, M., Prange, M., Oppo, D. W., De Pol-Holz, R., Merkel, U., Zhang, X., Steinke, S., and Lückge, A.: North Atlantic forcing of tropical Indian Ocean climate, Nature, 509, 76–80, 2014.
Morse, J. W., Mucci, A., and Millero, F. J.: The solubility of calcite and aragonite in seawater at various salinities, temperatures and atmosphere total pressure, Geochim. Cosmochim. Ac., 44, 85–94, 1980.
Munz, P. M., Siccha, M., Lückge, A., Böll, A., Kucera, M., and Schulz, H.: Decadal-resolution record of winter monsoon intensity over the last two millennia from planktic foraminiferal assemblages in the northeastern Arabian Sea, The Holocene, 25, 1756–1771, 2015.
Munz, P. M., Lückge, A., Siccha, M., Böll, A., Forke, S., Kucera, M., and Schulz, H.: The Indian winter monsoon and its response to external forcing over the last two and a half centuries, Clim. Dynam., 1–12, https://doi.org/10.1007/s00382-016-3403-1, 2016.
Munz, P., Steinke, S., Böll, A., Lückge, A., Groeneveld, J., Kucera, M., and Schulz, H.: Decadal resolution record of sediment core M74/1b_944-6 (SL 163), https://doi.org/10.1594/PANGAEA.874696, Supplement to: Munz, P. et al. (2016): Decadal resolution record of Oman margin upwelling indicates persistent solar forcing of the Indian summer monsoon after the early Holocene summer insolation maximum, Climate of the Past Discussions, 1–31, https://doi.org/10.5194/cp-2016-107, 2017.
Murtugudde, R., Seager, R., and Thoppil, P.: Arabian Sea response to monsoon variations, Paleoceanography, 22, PA4217, https://doi.org/10.1029/2007PA001467, 2007.
Naidu, P. D. and Malmgren, B. A.: A High-resolution record of Late Quaternary upwelling along the Oman Margin, Arabian Sea based on planktonic foraminifera, Paleoceanography, 11, 129–140, 1996.
Neff, U., Burns, S. J., Mangini, A., Mudelsee, M., Fleitmann, D., and Matter, A.: Strong coherence between solar variability and the monsoon in Oman between 9 and 6 kyr ago, Nature, 411, 290–293, 2001.
Oksanen, J., Blanchet, F. G., Kindt, R., Legendre, P., Minchin, P. R., O'Hara, R. B., Simpson, G. L., Solymos, P., Stevens, M. H. H., and Wagner, H.: vegan: Community Ecology Package, r package version 2.3-1 edn., 2015.
Paillard, D., Labeyrie, L., and Yiou, P.: Macintosh program performs time-series analysis, Eos Trans. AGU, 77, 379, https://doi.org/10.1029/96EO00259, 1996.
Paulmier, A., Ruiz-Pino, D., and Garçon, V.: CO2 maximum in the oxygen minimum zone (OMZ), Biogeosciences, 8, 239–252, https://doi.org/10.5194/bg-8-239-2011, 2011.
Peeters, F. J. C. and Brummer, G. J. A.: The seasonal and vertical distribution of living planktic foraminifera in the NW Arabian Sea, Geological Society, London, Special Publications, 195, 463–497, 2002.
Peeters, F. J. C., Brummer, G.-J. A., and Ganssen, G.: The effect of upwelling on the distribution and stable isotope composition of Globigerina bulloides and Globigerinoides ruber (planktic foraminifera) in modern surface waters of the NW Arabian Sea, Global Planet. Change, 34, 269–291, 2002.
Pflaumann, U., Duprat, J., Pujol, C., and Labeyrie, L.: SIMMAX: A modern analog technique to deduce Atlantic sea surface temperatures from planktonic foraminifera in deep-sea sediments, Paleoceanography, 11, 15–35, 1996.
Prasanna Kumar, S. and Prasad, T. G.: Formation and spreading of Arabian Sea high-salinity water mass, J. Geophys. Res., 104, 1455–1464, 1999.
Prell, W. L. and Curry, W. B.: Faunal and isotopic indices of monsoonal upwelling-western arabian sea, Oceanol. Acta, 4, 91–98, 1981.
R Core Team: R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing, Vienna, Austria, 2015.
Reichart, G.-J., Schenau, S. J., De Lange, G. J., and Zachariasse, W. J.: Synchroneity of oxygen minimum zone intensity on the Oman and Pakistan Margins at sub-Milankovitch time scales, Mar. Geol., 185, 403–415, 2002.
Reimer, P. J., Bard, E., Bayliss, A., Beck, J. W., Blackwell, P. G., Bronk Ramsey, C., Buck, C. E., Cheng, H., Edwards, R. L., Friedrich, M., Grootes, P. M., Guilderson, T. P., Haflidason, H., Hajdas, I., Hatté, C., Heaton, T. J., Hoffmann, D. L., Hogg, A. G., Hughen, K. A., Kaiser, K. F., Kromer, B., Manning, S. W., Niu, M., Reimer, R. W., Richards, D. A., Scott, E. M., Southon, J. R., Staff, R. A., Turney, C. S. M., and van der Plicht, J.: IntCal13 and Marine13 radiocarbon age calibration curves 0–50,000 years cal BP, Radiocarbon, 55, 1869–1887, 2013.
Rohling, E. J. and Zachariasse, W. J.: Red Sea outflow during the last glacial maximum, Quaternary Int., 31, 77–83, 1996.
Sadekov, A. Y., Darling, K. F., Ishimura, T., Wade, C. M., Kimoto, K., Singh, A. D., Anand, P., Kroon, D., Jung, S., Ganssen, G., Ganeshram, R., Tsunogai, U., and Elderfield, H.: Geochemical imprints of genotypic variants of Globigerina bulloides in the Arabian Sea, Paleoceanography, 31, 2016PA002947, https://doi.org/10.1002/2016PA002947, 2016.
Sagawa, T., Kuwae, M., Tsuruoka, K., Nakamura, Y., Ikehara, M., and Murayama, M.: Solar forcing of centennial-scale East Asian winter monsoon variability in the mid- to late Holocene, Earth Planet. Sc. Lett., 395, 124–135, 2014.
Schiebel, R., Zeltner, A., Treppke, U. F., and Waniek, J. J.: Distribution of diatoms, coccolithophores and planktic foraminifers along a trophic gradient during SW monsoon in the Arabian Sea, Mar. Micropaleontol., 51, 345–371, 2004.
Schlitzer, R.: Ocean Data View, http://odv.awi.de, 2015.
Schmiedl, G. and Leuschner, D. C.: Oxygenation changes in the deep western Arabian Sea during the last 190,000 years: Productivity versus deepwater circulation, Paleoceanography, 20, PA2008, https://doi.org/10.1029/2004PA001044, 2005.
Schnetger, B., Brumsack, H. J., Schale, H., and Hinrichs, J.: Geochemical characteristics of deep-sea sediments from the Arabian Sea: a high-resolution study, Deep-Sea Res., 47, 2735–2768, 2000.
Schulz, H., von Rad, U., and Ittekkot, V.: Planktic foraminifera, particle flux and oceanic productivity off Pakistan, NE Arabian Sea: modern analogues and application to the palaeoclimatic record, in: The Tectonic and Climatic Evolution of the Arabian Sea Region, edited by: Clift, P. D., Kroon, D., Gaedicke, C., and Craig, J., 499–516, Geological Society of London, London, 2002.
Seidenglanz, A., Prange, M., Varma, V., and Schulz, M.: Ocean temperature response to idealized Gleissberg and de Vries solar cycles in a comprehensive climate model, Geophys. Res. Lett., 39, L22602, https://doi.org/10.1029/2012GL053624, 2012.
Shetye, S. R., Gouveia, A. D., and Shenoi, S.: Circulation and water masses of the Arabian Sea, Proc. Indian Acad. Sci. (Earth Planet. Sci.), 103, 107–123, 1994.
Solanki, S. K., Usoskin, I. G., Kromer, B., Schüssler, M., and Beer, J.: Unusual activity of the Sun during recent decades compared to the previous 11,000 years, Nature, 431, 1084–1087, 2004.
Southon, J., Kashgarian, M., Fontugne, M., Metivier, B., and Yim, W. W. S.: Marine Reservoir Corrections for the Indian Ocean and Southeast Asia, Radiocarbon, 44, 167–180, 2002.
Staubwasser, M., Sirocko, F., Grootes, P. M., and Erlenkeuser, H.: South Asian monsoon climate change and radiocarbon in the Arabian Sea during early and middle Holocene, Paleoceanography, 17, 15-1–15-12, 2002.
Staubwasser, M., Sirocko, F., Grootes, P. M., and Segl, M.: Climate change at the 4.2 ka BP termination of the Indus valley civilization and Holocene south Asian monsoon variability, Geophysical Res. Lett., 30, 1425, https://doi.org/10.1029/2002GL016822, 2003.
Steinhilber, F., Abreu, J. A., Beer, J., Brunner, I., Christl, M., Fischer, H., Heikkilä, U., Kubik, P. W., Mann, M., McCracken, K. G., Miller, H., Miyahara, H., Oerter, H., and Wilhelms, F.: 9,400 years of cosmic radiation and solar activity from ice cores and tree rings., P. Natl. Acad. Sci. USA, 109, 5967–5971, 2012.
Telford, R.: palaeoSig: Significance Tests of Quantitative Palaeoenvironmental Reconstructions , r package version 1.1-3 edn., 2015.
Telford, R. J. and Birks, H. J. B.: A novel method for assessing the statistical significance of quantitative reconstructions inferred from biotic assemblages, Quaternary Sci. Rev., 30, 1272–1278, 2011.
ter Braak, C. J. F. and Juggins, S.: Weighted averaging partial least squares regression (WA-PLS): An improved method for reconstructing environmental variables from species assemblages, Hydrobiologia, 269–270, 485–502, 1993.
Thamban, M., Kawahata, H., and Rao, V. P.: Indian summer monsoon variability during the holocene as recorded in sediments of the Arabian Sea: Timing and implications, J. Oceanography, 63, 1009–1020, 2007.
Tomczak, M. and Godfrey, J. S.: Regional Oceanography, Pergamon, Oxford, U.K., 1994.
Tribovillard, N., Algeo, T. J., Lyons, T., and Riboulleau, A.: Trace metals as paleoredox and paleoproductivity proxies: An update, Chem. Geol., 232, 12–32, 2006.
Turner, T. E., Swindles, G. T., Charman, D. J., Langdon, P. G., Morris, P. J., Booth, R. K., Parry, L. E., and Nichols, J. E.: Solar cycles or random processes? Evaluating solar variability in Holocene climate records, Scientific Reports, 6, 23961, https://doi.org/10.1038/srep23961, 2016.
von Rad, U., Schaaf, M., Michels, K. H., Schulz, H., Berger, W. H., and Sirocko, F.: A 5000-yr Record of Climate Change in Varved Sediments from the Oxygen Minimum Zone off Pakistan, Northeastern Arabian Sea, Quaternary Res., 51, 39–53, https://doi.org/10.1006/qres.1998.2016, 1999.
Wang, L., Sarnthein, M., Erlenkeuser, H., Grimalt, J., Grootes, P., Heilig, S., Ivanova, E., Kienast, M., Pelejero, C., and Pflaumann, U.: East Asian monsoon climate during the Late Pleistocene: high-resolution sediment records from the South China Sea, Mar. Geol., 156, 245–284, https://doi.org/10.1016/S0025-3227(98)00182-0, 1999.
Wang, Y., Cheng, H., Edwards, R. L., He, Y., Kong, X., and An, Z.: The Holocene Asian monsoon: links to solar changes and North Atlantic climate, Science, 308, 854–857, 2005.
Ward, B. B., Devol, A. H., Rich, J. J., Chang, B. X., Bulow, S. E., Naik, H., Pratihary, A., and Jayakumar, A.: Denitrification as the dominant nitrogen loss process in the Arabian Sea, Nature, 461, 78–81, 2009.
Wedepohl, K. H.: Environmental influences on the chemical composition of shales and clays, in: Physics and Chemistry of the Earth, edited by: Ahrens, L. H., Press, F., Runcorn, S. K., and Urey, H. C., 307–331, Oxford, 1971.
Wedepohl, K. H., Merian, E., Anke, M., Ihnat, M., and Stoeppler, M.: The Composition of Earth's Upper Crust, Natural Cycles of Elements, Natural Resources, p. 2, Wiley-VCH Verlag GmbH, Weinheim, 1991.
Wyrtki, K.: Physical Oceanography of the Indian Ocean, The Biology of the Indian Ocean, 18–36, 1973.
You, Y.: Intermediate water circulation and ventilation of the Indian Ocean derived from water-mass contributions, J. Mar. Res., 56, 1029–1067, 1998.
You, Y. and Tomczak, M.: Thermocline circulation and ventilation in the Indian Ocean derived from water mass analysis, Deep-Sea Res. Pt. I, 40, 13–56, 1993.
Zahn, R. and Pedersen, T. F.: Late Pleistocene evolution of surface and mid depth hydrography at the Oman Margin: planktonic and benthic isotope records at Site 724, Proc. Ocean Drilling Program, 1991.
Short summary
We present the results of several independent proxies of summer SST and upwelling SST from the Oman margin indicative of monsoon strength during the early Holocene. In combination with indices of carbonate preservation and bottom water redox conditions, we demonstrate that a persistent solar influence was modulating summer monsoon intensity. Furthermore, bottom water conditions are linked to atmospheric forcing, rather than changes of intermediate water masses.
We present the results of several independent proxies of summer SST and upwelling SST from the...
