Articles | Volume 43, issue 1
https://doi.org/10.5194/jm-43-165-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-43-165-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Jun 2024
Research article |
| 18 Jun 2024
| 18 Jun 2024
South Georgia marine productivity over the past 15 ka and implications for glacial evolution
Jack T. R. Wilkin
CORRESPONDING AUTHOR
Department of Earth and Environmental Sciences, University of Exeter, Penryn, TR10 9EZ, UK
British Antarctic Survey, Cambridge, CB3 0ET, UK
Sev Kender
Department of Earth and Environmental Sciences, University of Exeter, Penryn, TR10 9EZ, UK
British Geological Survey, Nottingham, NG12 5GG, UK
Rowan Dejardin
School of Geographical Sciences, University of Bristol, Bristol, BS8 1SS, UK
Claire S. Allen
British Antarctic Survey, Cambridge, CB3 0ET, UK
Victoria L. Peck
British Antarctic Survey, Cambridge, CB3 0ET, UK
George E. A. Swann
School of Geography, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
Erin L. McClymont
Department of Geography, Durham University, Durham, DH1 3LE, UK
James D. Scourse
Department of Earth and Environmental Sciences, University of Exeter, Penryn, TR10 9EZ, UK
Kate Littler
Department of Earth and Environmental Sciences, University of Exeter, Penryn, TR10 9EZ, UK
Environment and Sustainability Institute, University of Exeter, Penryn, TR10 9EZ, UK
Melanie J. Leng
British Geological Survey, Nottingham, NG12 5GG, UK
School of Biosciences, University of Nottingham, Loughborough, NE12 5RD, UK
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Honbing Edmond Duong, Heather L. Ford, Yong Sun, Julia Tindall, Alan Haywood, Taylor Deneau, Clay Tabor, Ran Feng, Natalie Burls, Sze Ling Ho, Erin L. McClymont, Sarah Greene, Pam Vervoort, Jordan T. Abell, Montserrat Alonso-Garcia, Pallavi Anand, Melissa Berke, Anya Crocker, Friso de Graaf, Stijn De Schepper, Cyrus Karas, Kate Littler, Benjamin Petrick, Amila Sandaruwan Ratnayake, Bjørg Risebrobakken, George E. A. Swann, Christian Stepanek, Deborah Tangunan, Kaustubh Thirumalai, and Antje H. L. Voelker
EGUsphere, https://doi.org/10.5194/egusphere-2026-6464, https://doi.org/10.5194/egusphere-2026-6464, 2026
This preprint is open for discussion and under review for Climate of the Past (CP).
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Deep circulation in the Atlantic helps regulate climate by moving heat and carbon around the globe. Using fossil evidence from a warm period 3 million years ago, this study found that North Atlantic Deep Water was more widespread than climate models suggest. Disagreements between the fossil data and climate models highlight uncertainties in the fossil data and climate models and how the deep ocean responds to warming, limiting predictions of future deep ocean changes.
Sindia M. Sosdian, Alexandra Auderset, Sevasti Modestou, Ann Holbourn, Flavia Boscolo-Galazzo, Anna Joy Drury, Anya V. Hess, Karlos G. D. Kochhann, Diederik Liebrand, Xiaoqing Liu, Jared Nirenberg, Neeraj S. Shah, Deborah Tangunan, Gerald Auer, Marcus P. S. Badger, Clara Bolton, Alexander Clark, Anya Crocker, David Evans, Sarah Feakins, Timothy Herbert, Emily Judd, Jennifer Kasbohm, David King, Wout Krijgsman, Wolfgang Kuhnt, Kira Lawrence, Caroline H. Lear, Kim Marshall-Mills, Erin McClymont, Nele Meckler, Paul Minton, Katrina Nilsson-Kerr, Diana Ochoa, Marci Robinson, Thamizharasan Sakthivel, Francesca Sangiorgi, Amelia E. Shevenell, Weimin Si, Elizabeth Sibert, Kasia K. Sliwinska, Appy Sluijs, Heather Stoll, Victoria Taylor, Tim van Peer, Bridget Wade, Thomas Westerhold, Evi Wubben, Yige Zhang, and Martin Ziegler
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2026-699, https://doi.org/10.5194/essd-2026-699, 2026
Preprint under review for ESSD
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The MioOcean database hosts Miocene (23–5.3 million years ago) ocean temperatures, standardised and with updated age information, comprising 22,941 data points from 101 scientific studies. As parts of the Miocene were warmer than present, with estimated CO2 levels similar to those projected for the near future, this database enables assessment of how past oceans responded to climate variations, which may improve predictions of climate responses to anticipated future warming.
Rhiannon L. Jones, Maeve C. Lohan, Tobias Ehmen, Lisa Friberg, Ben Lincoln, Katy Sheen, Siobhan Foden, Katrien Van Landeghem, Kate Retallick, George Dadd, James Scourse, and Amber L. Annett
EGUsphere, https://doi.org/10.5194/egusphere-2026-3712, https://doi.org/10.5194/egusphere-2026-3712, 2026
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In the ocean, iron is an essential yet scarce nutrient for primary producers. Melting glaciers in the Antarctic deliver high loads of sediment, rich in iron, to the coastal seafloor. This study investigates the reactivity and magnitude of iron released when seafloor sediment is resuspended into the water column by tidal and wave processes. These sediments are highly reactive and release high amounts of iron. We suggest these coastal processes are key for supplying iron to the Antarctic shelf.
Zoë A. Roseby, Sophie L. Ward, Torsa Sengupta, Callum M. Roberts, and James D. Scourse
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2026-220, https://doi.org/10.5194/essd-2026-220, 2026
Revised manuscript accepted for ESSD
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Maps of seabed sediments on continental shelves are vital for understanding habitats, carbon storage, and ocean processes. For the Patagonian Shelf, no unified, accessible dataset existed. We compiled and standardised available grain size data, then used interpolation to create continuous maps of sediment type. Our results are consistent with previous studies, showing that sand dominates the shelf and muds are largely confined to inner shelf gulfs, while also identifying gaps in data coverage.
Mark A. Stevenson, Dominic A. Hodgson, Michael J. Bentley, Darren R. Gröcke, Neil Tunstall, Chris Longley, Alice Graham, and Erin L. McClymont
Clim. Past, 21, 2465–2483, https://doi.org/10.5194/cp-21-2465-2025, https://doi.org/10.5194/cp-21-2465-2025, 2025
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We present a record of sea ice and climate inferred from novel snow petrel stomach oil deposits from East Antarctica. Snow petrels feed in the sea ice on a mixture of marine organisms and regurgitate these oils close to their nesting sites in nunatak mountains. We use makers of past diet and productivity from within a deposit to show how sea ice and climate has varied over part of the Holocene. Three periods are identified ranging from low to intermediate and increased sea ice cover.
Louise C. Sime, Rahul Sivankutty, Irene Malmierca-Vallet, Sentia Goursaud Oger, Allegra N. LeGrande, Erin L. McClymont, Agatha de Boer, Alexandre Cauquoin, and Martin Werner
Clim. Past, 21, 1725–1753, https://doi.org/10.5194/cp-21-1725-2025, https://doi.org/10.5194/cp-21-1725-2025, 2025
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We used climate models to study how stable water isotopes in ice cores changed in the Arctic and Antarctica during the warm Last Interglacial (LIG) period. Whilst standard simulations underestimate polar warming, when the effects of ice sheet meltwater from the preceding deglaciation are included, there is a much better match with observations. Findings suggest that previous estimates of LIG Arctic warming were too high. Understanding these past polar changes can help improve future predictions.
Qiang Zhang, George E. A. Swann, Vanessa Pashley, and Matthew S. A. Horstwood
Biogeosciences, 22, 3533–3546, https://doi.org/10.5194/bg-22-3533-2025, https://doi.org/10.5194/bg-22-3533-2025, 2025
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We present the first coupled record of radiolarian silicon isotopes (δ30Sirad) from paired water column and surface sediment samples, along with the fractionation factor for δ30Sirad in the South China Sea. No significant discrepancies in δ30Sirad values were observed between plankton and sediment samples, implying minimal dissolution impact on δ30Sirad during sinking. This indicates faithful preservation of the δ30Sirad signature and its potential for studying past marine silicon cycle changes.
James D. Annan, Julia C. Hargreaves, Thorsten Mauritsen, Erin McClymont, and Sze Ling Ho
Clim. Past, 20, 1989–1999, https://doi.org/10.5194/cp-20-1989-2024, https://doi.org/10.5194/cp-20-1989-2024, 2024
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We have created a new global surface temperature reconstruction of the climate of the mid-Pliocene Warm Period, representing the period roughly 3.2 million years before the present day. We estimate that the globally averaged mean temperature was around 3.9 °C warmer than it was in pre-industrial times, but there is significant uncertainty in this value.
Martina L. G. Conti, Paul G. Butler, David J. Reynolds, Tamara Trofimova, James D. Scourse, and Kirsty E. H. Penkman
Geochronology, 6, 175–198, https://doi.org/10.5194/gchron-6-175-2024, https://doi.org/10.5194/gchron-6-175-2024, 2024
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The mollusc Arctica islandica can survive for hundreds of years, and its annual growth captures environmental conditions, each shell providing a detailed climatic record. Dating is essential for sample selection, but radiocarbon and cross-dating are laborious and costly. Alternatively, amino acid geochronology was investigated in the three aragonitic layers of the shells. This study confirms the value of AAG in the iOSL layer as a method for range-finder dating Quaternary A. islandica shells.
Lauren E. Burton, Alan M. Haywood, Julia C. Tindall, Aisling M. Dolan, Daniel J. Hill, Erin L. McClymont, Sze Ling Ho, and Heather L. Ford
Clim. Past, 20, 1177–1194, https://doi.org/10.5194/cp-20-1177-2024, https://doi.org/10.5194/cp-20-1177-2024, 2024
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The Pliocene (~ 3 million years ago) is of interest because its warm climate is similar to projections of the future. We explore the role of atmospheric carbon dioxide in forcing sea surface temperature during the Pliocene by combining climate model outputs with palaeoclimate proxy data. We investigate whether this role changes seasonally and also use our data to suggest a new estimate of Pliocene climate sensitivity. More data are needed to further explore the results presented.
Philip Meister, Anne Alexandre, Hannah Bailey, Philip Barker, Boris K. Biskaborn, Ellie Broadman, Rosine Cartier, Bernhard Chapligin, Martine Couapel, Jonathan R. Dean, Bernhard Diekmann, Poppy Harding, Andrew C. G. Henderson, Armand Hernandez, Ulrike Herzschuh, Svetlana S. Kostrova, Jack Lacey, Melanie J. Leng, Andreas Lücke, Anson W. Mackay, Eniko Katalin Magyari, Biljana Narancic, Cécile Porchier, Gunhild Rosqvist, Aldo Shemesh, Corinne Sonzogni, George E. A. Swann, Florence Sylvestre, and Hanno Meyer
Clim. Past, 20, 363–392, https://doi.org/10.5194/cp-20-363-2024, https://doi.org/10.5194/cp-20-363-2024, 2024
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This paper presents the first comprehensive compilation of diatom oxygen isotope records in lake sediments (δ18OBSi), supported by lake basin parameters. We infer the spatial and temporal coverage of δ18OBSi records and discuss common hemispheric trends on centennial and millennial timescales. Key results are common patterns for hydrologically open lakes in Northern Hemisphere extratropical regions during the Holocene corresponding to known climatic epochs, i.e. the Holocene Thermal Maximum.
Tobias Roylands, Robert G. Hilton, Erin L. McClymont, Mark H. Garnett, Guillaume Soulet, Sébastien Klotz, Mathis Degler, Felipe Napoleoni, and Caroline Le Bouteiller
Earth Surf. Dynam., 12, 271–299, https://doi.org/10.5194/esurf-12-271-2024, https://doi.org/10.5194/esurf-12-271-2024, 2024
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Chemical weathering of sedimentary rocks can release carbon dioxide and consume oxygen. We present a new field-based method to measure the exchange of these gases in real time, which allows us to directly compare the amount of reactants and products. By studying two sites with different rock types, we show that the chemical composition is an important factor in driving the weathering reactions. Locally, the carbon dioxide release changes alongside temperature and precipitation.
Stephen P. Hesselbo, Aisha Al-Suwaidi, Sarah J. Baker, Giorgia Ballabio, Claire M. Belcher, Andrew Bond, Ian Boomer, Remco Bos, Christian J. Bjerrum, Kara Bogus, Richard Boyle, James V. Browning, Alan R. Butcher, Daniel J. Condon, Philip Copestake, Stuart Daines, Christopher Dalby, Magret Damaschke, Susana E. Damborenea, Jean-Francois Deconinck, Alexander J. Dickson, Isabel M. Fendley, Calum P. Fox, Angela Fraguas, Joost Frieling, Thomas A. Gibson, Tianchen He, Kat Hickey, Linda A. Hinnov, Teuntje P. Hollaar, Chunju Huang, Alexander J. L. Hudson, Hugh C. Jenkyns, Erdem Idiz, Mengjie Jiang, Wout Krijgsman, Christoph Korte, Melanie J. Leng, Timothy M. Lenton, Katharina Leu, Crispin T. S. Little, Conall MacNiocaill, Miguel O. Manceñido, Tamsin A. Mather, Emanuela Mattioli, Kenneth G. Miller, Robert J. Newton, Kevin N. Page, József Pálfy, Gregory Pieńkowski, Richard J. Porter, Simon W. Poulton, Alberto C. Riccardi, James B. Riding, Ailsa Roper, Micha Ruhl, Ricardo L. Silva, Marisa S. Storm, Guillaume Suan, Dominika Szűcs, Nicolas Thibault, Alfred Uchman, James N. Stanley, Clemens V. Ullmann, Bas van de Schootbrugge, Madeleine L. Vickers, Sonja Wadas, Jessica H. Whiteside, Paul B. Wignall, Thomas Wonik, Weimu Xu, Christian Zeeden, and Ke Zhao
Sci. Dril., 32, 1–25, https://doi.org/10.5194/sd-32-1-2023, https://doi.org/10.5194/sd-32-1-2023, 2023
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We present initial results from a 650 m long core of Late Triasssic to Early Jurassic (190–202 Myr) sedimentary strata from the Cheshire Basin, UK, which is shown to be an exceptional record of Earth evolution for the time of break-up of the supercontinent Pangaea. Further work will determine periodic changes in depositional environments caused by solar system dynamics and used to reconstruct orbital history.
Georgia R. Grant, Jonny H. T. Williams, Sebastian Naeher, Osamu Seki, Erin L. McClymont, Molly O. Patterson, Alan M. Haywood, Erik Behrens, Masanobu Yamamoto, and Katelyn Johnson
Clim. Past, 19, 1359–1381, https://doi.org/10.5194/cp-19-1359-2023, https://doi.org/10.5194/cp-19-1359-2023, 2023
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Regional warming will differ from global warming, and climate models perform poorly in the Southern Ocean. We reconstruct sea surface temperatures in the south-west Pacific during the mid-Pliocene, a time 3 million years ago that represents the long-term outcomes of 3 °C warming, which is expected for the future. Comparing these results to climate model simulations, we show that the south-west Pacific region will warm by 1 °C above the global average if atmospheric CO2 remains above 350 ppm.
Bjørg Risebrobakken, Mari F. Jensen, Helene R. Langehaug, Tor Eldevik, Anne Britt Sandø, Camille Li, Andreas Born, Erin Louise McClymont, Ulrich Salzmann, and Stijn De Schepper
Clim. Past, 19, 1101–1123, https://doi.org/10.5194/cp-19-1101-2023, https://doi.org/10.5194/cp-19-1101-2023, 2023
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In the observational period, spatially coherent sea surface temperatures characterize the northern North Atlantic at multidecadal timescales. We show that spatially non-coherent temperature patterns are seen both in further projections and a past warm climate period with a CO2 level comparable to the future low-emission scenario. Buoyancy forcing is shown to be important for northern North Atlantic temperature patterns.
James A. Smith, Louise Callard, Michael J. Bentley, Stewart S. R. Jamieson, Maria Luisa Sánchez-Montes, Timothy P. Lane, Jeremy M. Lloyd, Erin L. McClymont, Christopher M. Darvill, Brice R. Rea, Colm O'Cofaigh, Pauline Gulliver, Werner Ehrmann, Richard S. Jones, and David H. Roberts
The Cryosphere, 17, 1247–1270, https://doi.org/10.5194/tc-17-1247-2023, https://doi.org/10.5194/tc-17-1247-2023, 2023
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The Greenland Ice Sheet is melting at an accelerating rate. To understand the significance of these changes we reconstruct the history of one of its fringing ice shelves, known as 79° N ice shelf. We show that the ice shelf disappeared 8500 years ago, following a period of enhanced warming. An important implication of our study is that 79° N ice shelf is susceptible to collapse when atmospheric and ocean temperatures are ~2°C warmer than present, which could occur by the middle of this century.
Xavier Crosta, Karen E. Kohfeld, Helen C. Bostock, Matthew Chadwick, Alice Du Vivier, Oliver Esper, Johan Etourneau, Jacob Jones, Amy Leventer, Juliane Müller, Rachael H. Rhodes, Claire S. Allen, Pooja Ghadi, Nele Lamping, Carina B. Lange, Kelly-Anne Lawler, David Lund, Alice Marzocchi, Katrin J. Meissner, Laurie Menviel, Abhilash Nair, Molly Patterson, Jennifer Pike, Joseph G. Prebble, Christina Riesselman, Henrik Sadatzki, Louise C. Sime, Sunil K. Shukla, Lena Thöle, Maria-Elena Vorrath, Wenshen Xiao, and Jiao Yang
Clim. Past, 18, 1729–1756, https://doi.org/10.5194/cp-18-1729-2022, https://doi.org/10.5194/cp-18-1729-2022, 2022
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Despite its importance in the global climate, our knowledge of Antarctic sea-ice changes throughout the last glacial–interglacial cycle is extremely limited. As part of the Cycles of Sea Ice Dynamics in the Earth system (C-SIDE) Working Group, we review marine- and ice-core-based sea-ice proxies to provide insights into their applicability and limitations. By compiling published records, we provide information on Antarctic sea-ice dynamics over the past 130 000 years.
Dieter R. Tetzner, Elizabeth R. Thomas, Claire S. Allen, and Mackenzie M. Grieman
Clim. Past, 18, 1709–1727, https://doi.org/10.5194/cp-18-1709-2022, https://doi.org/10.5194/cp-18-1709-2022, 2022
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Changes in the Southern Hemisphere westerly winds are drivers of recent environmental changes in West Antarctica. However, our understanding of this relationship is limited by short and sparse observational records. Here we present the first regional wind study based on the novel use of diatoms preserved in Antarctic ice cores. Our results demonstrate that diatom abundance is the optimal record for reconstructing wind strength variability over the Southern Hemisphere westerly wind belt.
Gilles Reverdin, Claire Waelbroeck, Catherine Pierre, Camille Akhoudas, Giovanni Aloisi, Marion Benetti, Bernard Bourlès, Magnus Danielsen, Jérôme Demange, Denis Diverrès, Jean-Claude Gascard, Marie-Noëlle Houssais, Hervé Le Goff, Pascale Lherminier, Claire Lo Monaco, Herlé Mercier, Nicolas Metzl, Simon Morisset, Aïcha Naamar, Thierry Reynaud, Jean-Baptiste Sallée, Virginie Thierry, Susan E. Hartman, Edward W. Mawji, Solveig Olafsdottir, Torsten Kanzow, Anton Velo, Antje Voelker, Igor Yashayaev, F. Alexander Haumann, Melanie J. Leng, Carol Arrowsmith, and Michael Meredith
Earth Syst. Sci. Data, 14, 2721–2735, https://doi.org/10.5194/essd-14-2721-2022, https://doi.org/10.5194/essd-14-2721-2022, 2022
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The CISE-LOCEAN seawater stable isotope dataset has close to 8000 data entries. The δ18O and δD isotopic data measured at LOCEAN have uncertainties of at most 0.05 ‰ and 0.25 ‰, respectively. Some data were adjusted to correct for evaporation. The internal consistency indicates that the data can be used to investigate time and space variability to within 0.03 ‰ and 0.15 ‰ in δ18O–δD17; comparisons with data analyzed in other institutions suggest larger differences with other datasets.
Andrew L. A. Johnson, Annemarie M. Valentine, Bernd R. Schöne, Melanie J. Leng, and Stijn Goolaerts
Clim. Past, 18, 1203–1229, https://doi.org/10.5194/cp-18-1203-2022, https://doi.org/10.5194/cp-18-1203-2022, 2022
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Determining seasonal temperatures demands proxies that record the highest and lowest temperatures over the annual cycle. Many record neither, but oxygen isotope profiles from shells in principle record both. Oxygen isotope data from late Pliocene bivalve molluscs of the southern North Sea basin show that the seasonal temperature range was at times much higher than previously estimated and higher than now. This suggests reduced oceanic heat supply, in contrast to some previous interpretations.
Joanne S. Johnson, Ryan A. Venturelli, Greg Balco, Claire S. Allen, Scott Braddock, Seth Campbell, Brent M. Goehring, Brenda L. Hall, Peter D. Neff, Keir A. Nichols, Dylan H. Rood, Elizabeth R. Thomas, and John Woodward
The Cryosphere, 16, 1543–1562, https://doi.org/10.5194/tc-16-1543-2022, https://doi.org/10.5194/tc-16-1543-2022, 2022
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Recent studies have suggested that some portions of the Antarctic Ice Sheet were less extensive than present in the last few thousand years. We discuss how past ice loss and regrowth during this time would leave its mark on geological and glaciological records and suggest ways in which future studies could detect such changes. Determining timing of ice loss and gain around Antarctica and conditions under which they occurred is critical for preparing for future climate-warming-induced changes.
Dieter R. Tetzner, Claire S. Allen, and Elizabeth R. Thomas
The Cryosphere, 16, 779–798, https://doi.org/10.5194/tc-16-779-2022, https://doi.org/10.5194/tc-16-779-2022, 2022
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The presence of diatoms in Antarctic ice cores has been scarcely documented and poorly understood. Here we present a detailed analysis of the spatial and temporal distribution of the diatom record preserved in a set of Antarctic ice cores. Our results reveal that the timing and amount of diatoms deposited present a strong geographical division. This study highlights the potential of the diatom record preserved in Antarctic ice cores to provide useful information about past environmental changes.
Erin L. McClymont, Michael J. Bentley, Dominic A. Hodgson, Charlotte L. Spencer-Jones, Thomas Wardley, Martin D. West, Ian W. Croudace, Sonja Berg, Darren R. Gröcke, Gerhard Kuhn, Stewart S. R. Jamieson, Louise Sime, and Richard A. Phillips
Clim. Past, 18, 381–403, https://doi.org/10.5194/cp-18-381-2022, https://doi.org/10.5194/cp-18-381-2022, 2022
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Sea ice is important for our climate system and for the unique ecosystems it supports. We present a novel way to understand past Antarctic sea-ice ecosystems: using the regurgitated stomach contents of snow petrels, which nest above the ice sheet but feed in the sea ice. During a time when sea ice was more extensive than today (24 000–30 000 years ago), we show that snow petrel diet had varying contributions of fish and krill, which we interpret to show changing sea-ice distribution.
Anson W. Mackay, Vivian A. Felde, David W. Morley, Natalia Piotrowska, Patrick Rioual, Alistair W. R. Seddon, and George E. A. Swann
Clim. Past, 18, 363–380, https://doi.org/10.5194/cp-18-363-2022, https://doi.org/10.5194/cp-18-363-2022, 2022
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We investigated the diversity of algae called diatoms in Lake Baikal, the oldest and deepest lake in the world, because algae sit at the base of aquatic foodwebs and provide energy (in the form of primary production) for other organisms to use. Diatom diversity and primary production have been influenced by both long-term and abrupt climate change over the past 16 000 years. The shape of these responses appears to be time-period specific.
Stephen C. Phillips and Kate Littler
Sci. Dril., 30, 59–74, https://doi.org/10.5194/sd-30-59-2022, https://doi.org/10.5194/sd-30-59-2022, 2022
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Smear slides are a method of estimating sediment composition that is widely used as part of scientific drilling expeditions. These estimates are frequently used to classify sediments but are often not used in further analysis. We show that smear slide estimates, even if not highly accurate, track well with downcore physical property and elemental analyses. This work gives confidence in smear slide estimates in characterizing trends and cycles in sediment composition.
Matthew Chadwick, Claire S. Allen, Louise C. Sime, Xavier Crosta, and Claus-Dieter Hillenbrand
Clim. Past, 18, 129–146, https://doi.org/10.5194/cp-18-129-2022, https://doi.org/10.5194/cp-18-129-2022, 2022
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Algae preserved in marine sediments have allowed us to reconstruct how much winter sea ice was present around Antarctica during a past time period (130 000 years ago) when the climate was warmer than today. The patterns of sea-ice increase and decrease vary between different parts of the Southern Ocean. The Pacific sector has a largely stable sea-ice extent, whereas the amount of sea ice in the Atlantic sector is much more variable with bigger decreases and increases than other regions.
Cited articles
Ahn, S., Khider, D., Lisiecki, L. E., and Lawrence, C. E.: A probabilistic Pliocene–Pleistocene stack of benthic δ18O using a profile hidden Markov model, Dynam. Stat. Clim. Syst., 2, dzx002, https://doi.org/10.1093/climsys/dzx002, 2017.
Allen, C. S., Peck, V. L., Graham, A. G. C., Blagbrough, H., Robinson, M. W., and McClymont, E.: Collecting records of past oceanographic conditions and calibrating new proxies in the Polar Front Zone of the SW Atlantic (Falkland Plateau, Shag Rocks and South Georgia), Cruise Report (JR-257), British Antarctic Survey, https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/jr257_254e.pdf (last access: 14 June 2024), 2012.
Alve, E.: Foraminifera, climatic change, and pollution: a study of late Holocene sediments in Drammensfiord, southeast Norway, The Holocene, 1, 243–262, https://doi.org/10.1177/095968369100100306, 1991.
Alve, E.: Benthic foraminiferal distribution and recolonization of formerly anoxic environments in Drammensfjord, southern Norway, Mar. Micropaleontol., 25, 169–186, https://doi.org/10.1016/0377-8398(95)00007-N, 1995.
Anderson, J. B.: Ecology and distribution of foraminifera in the Weddell Sea of Antarctica, Micropalaeontology, 21, 69–96, https://doi.org/10.2307/1485156, 1975.
Anderson, R. F., Ali, S., Bradtmiller, L. I., Nielsen, S. H. H., Fleisher, M. Q., Anderson, B. E., and Burckle, L. H.: Wind-Driven Upwelling in the Southern Ocean and the Deglacial Rise in Atmospheric CO2, Science, 323, 1443–1448, https://doi.org/10.1126/science.1167441, 2009.
Ardelan, M. V., Holm-Hansen, O., Hewes, C. D., Reiss, C. S., Silva, N. S., Dulaiova, H., Steinnes, E., and Sakshaug, E.: Natural iron enrichment around the Antarctic Peninsula in the Southern Ocean, Biogeosciences, 7, 11–25, https://doi.org/10.5194/bg-7-11-2010, 2010.
Atkinson, A., Whitehouse, M. J., Priddle, J., Cripps, G. C., Ward, P., and Brandon, M. A.: South Georgia, Antarctica: a productive, cold water, pelagic ecosystem, Mar. Ecol. Prog. Ser., 216, 279–308, http://https://doi.org/10.3354/meps216279, 2001.
Bakke, J., Paasche, Ø., Schaefer, J. M., and Timmermann, A.: Long-term demise of sub-Antarctic glaciers modulated by the Southern Hemisphere Westerlies, Sci. Rep., 11, 8361, https://doi.org/10.1038/s41598-021-87317-5, 2021.
Barlow, N. L. M., Bentley, M. J., Spada, G., Evans, D. J. A., Hansom, J. D., Brader, M. D., White, D. A., Zander, A., and Berg, S.: Testing models of ice cap extent, South Georgia, sub-Antarctic, Quaternary Sci. Rev., 154, 157–168, https://doi.org/10.1016/j.quascirev.2016.11.007, 2016.
Barnes, D. K. A., Sands, C. J., Hogg, O. T., Robinson, B. J. O., Downey, R. V., and Smith, J. A.: Biodiversity signature of the Last Glacial Maximum at South Georgia, Southern Ocean, J. Biogeogr., 43, 2391–2399, http://https://doi.org/10.1111/jbi.12855, 2016.
Björck. S., Rundgren, M., Ljung, K., Unkel, I., and Wallin, Å.: Multi-proxy analyses of a peat bog on Isla de los Estados, easternmost Tierra del Fuego: a unique record of the variable Southern Hemisphere Westerlies since the last deglaciation, Quaternary Sci. Rev., 42, 1–14, https://doi.org/10.1016/j.quascirev.2012.03.015, 2014.
Borrione, I., Aumont, O., Nielsdóttir, M. C., and Schlitzer, R.: Sedimentary and atmospheric sources of iron around South Georgia, Southern Ocean: a modelling perspective, Biogeosciences, 11, 1981–2001, https://doi.org/10.5194/bg-11-1981-2014, 2014.
Bentley, M. J., Evans, D. J. A., Fogwill, C. J., Hansom, J. D., Sugden, D. E., and Kubik, P. W.: Glacial geomorphology and chronology of deglaciation, South Georgia, sub-Antarctic, Quaternary Sci. Rev., 26, 644–677, https://doi.org/10.1016/j.quascirev.2006.11.019, 2007.
Berg, S., White, D. A., Jivcov, S., Melles, M., Leng, M. J., Rethemeyer, J., Allen, C., Perren, B., Bennike, O., and Viehberg, F.: Holocene glacier fluctuations and environmental changes in subantarctic South Georgia inferred from a sediment record from a coastal inlet, Quaternary Res., 91, 132–148, https://doi.org/10.1017/qua.2018.85, 2019.
Bracegirdle, T.: Southern Hemisphere tropospheric westerly jet: 1979-present, Polar Data Centre, Natural Environment Research Council, UK, https://doi.org/10.5285/3952a4fe-683a-42e7-a074-bdec41c8ab16, 2023.
Browne, I. M., Moy, C. M., Riesselman, C. R., Neil, H. L., Curtin, L. G., Gorman, A. R., and Wilson, G. S.: Late Holocene intensification of the westerly winds at the subantarctic Auckland Islands (51° S), New Zealand, Clim. Past 13, 1301–1322, https://doi.org/10.5194/cp-13-1301-2017, 2017.
Ciais, P., Petit, J. R., Jouzel, J., Lorius, C., Barkov, N. I., Lipenkov, V., and Nicolaïev, V.: Evidence for an early Holocene climatic optimum in the Antarctic deep ice-core record, Clim. Dynam., 6, 169–177, https://doi.org/10.1007/BF00193529, 1992.
Clapperton, C. M., Sugen, D. E., Birnie, J., and Wilson, M. J.: Late-Glacial and Holocene glacier fluctuations and environmental change on South Georgia, Southern Ocean, Quaternary Res., 31, 210–228, https://doi.org/10.1016/0033-5894(89)90006-9, 1989.
Clark, P. U., Dyke, A. S., Shakun, J. D., Carlson, A. E., Clark, J., Wohlfarth, B., Mitrovica, J. X., Hostetler, S. W., and McCabe, A. M.: The Last Glacial Maximum, Science, 325, 710–714, https://doi.org/10.1126/science.1172873, 2009.
Clark, P. U., McCabe, A. M., Mix, A. C., and Weaver, A. J.: Rapid rise of sea level 19,000 years ago and its global implications, Science, 304, 1141–1144, https://doi.org/10.1126/science.1094449, 2004.
Clark, P. U., Shakun, J. D., Baker, P. A., Bartlein, P. J., Brewer, S., Brook, E., Carlson, A. E., Cheng, H., Kaufman, D. S., Liu, Z., Marchitto, T. M., Mix, A. C., Morrill, C., Otto-Bliesner, B. L., Pahnke, K., Russell, J. M., Whitlock, C., Adkins, J. F., Blois, J. L., Clark, J., Colman, S. M., Curry, W. B., Flower, B. P., He, F., Johnson, T. C., Lynch-Stieglitz, J., Markgraf, V., McManus, J., Mitrovica, J. X., Moreno, P. I., and Williams, J. W.: Global climate evolution during the last deglaciation, Proceedings of the National Academy of Sciences, 109, E1134–E1142, https://doi.org/10.1073/pnas.1116619109, 2012.
Combes, V., Matano, R. P., Meredith, M. P., and Young, E. F.: Variability of the shelf circulation around South Georgia, Southern Ocean, J. Geophys. Res.-Ocean., 128, e2022JC019257, https://doi.org/10.1029/2022JC019257, 2023.
Conley, D. J. and Schelske, C. L.: Biogenic Silica, in: Tracking environmental change using lake sediments, Vol. 3, terrestrial, algal, and siliceous indicators, edited by: Smol, J. P., Birks, H. J. B., and Last, W. M., Kluwer Academic, Dordrecht, Netherlands, 281–293, https://doi.org/10.1007/0-306-47668-1_14, 2001.
Dejardin, R.: Reconstructing oceanographic conditions through the deglacial and Holocene (ca. 15 KA) at the sub-Antarctic island of South Georgia, Ph.D. thesis, University of Nottingham, United Kingdom, 257 pp., 2017.
Dejardin, R., Kender, S., Allen, C. S., Leng, M. J., Swann, G. E. A., and Peck, V. L.: “Live” (stained) benthic foraminiferal living depths, stable isotopes, and taxonomy offshore South Georgia, Southern Ocean: implications for calcification depths, J. Micropalaeontol., 37, 25–71, https://doi.org/10.5194/jm-37-25-2018, 2018.
Demaster, D. J.: The supply and accumulation of silica in the marine environment, Geochim. Cosmochim. Ac., 45, 1715–1732, https://doi.org/10.1016/0016-7037(81)90006-5, 1981.
Detlef, H., Sosdian, S. M., Kender, S., Lear, C. H., and Hall, I. R.: Multi-elemental composition of authigenic carbonates in benthic foraminifera from the eastern Bering Sea continental margin (International Ocean Discovery Program Site U1343), Geochim. Cosmochim. Ac., 268, 1–21, https://doi.org/10.1016/j.gca.2019.09.025, 2020.
Divine, D. V., Koç, N., Isaksson, E., Nielsen, S., Crosta, X., and Godtliebsen, F.: Holocene Antarctic climate variability from ice and marine sediment cores: Insights on ocean–atmosphere interaction, Quaternary Sci. Rev., 29, 303–312, https://doi.org/10.1016/j.quascirev.2009.11.012, 2010.
Favier, L., Pattyn, F., Berger, S., and Drews, R.: Dynamic influence of pinning points on marine ice-sheet stability: a numerical study in Dronning Maud Land, East Antarctica, The Cryosphere, 10, 2623–2635, https://doi.org/10.5194/tc-10-2623-2016, 2016.
Fisher, R. A., Corbet, A. S., and Williams, C. B.: The relation between the number of species and the number of individuals in a random sample of an animal population, J. Anim. Ecol., 12, 42–58, https://doi.org/10.2307/1411, 1943.
Fletcher, M.-S., Pedro, J., Hall, T., Mariani, M., Alexander, J. A., Beck, K., Blaauw, M., Hodgson, D. A., Heijnis, H., Gadd, P. S., and Lise-Pronovost, A.: Northward shift of the southern westerlies during the Antarctic Cold Reversal, Quaternary Sci. Rev., 271, 107189, https://doi.org/10.1016/j.quascirev.2021.107189, 2021.
Foster, L. C., Pearson, E. J., Juggins, S., Hodgson, D. A., Saunders, K. M., Verleyen, E., and Roberts, S. J.: Development of a regional glycerol dialkyl glycerol tetraether (GDGT)–temperature calibration for Antarctic and sub-Antarctic lakes, Earth Planet. Sc. Lett., 433, 370–379, https://doi.org/10.1016/j.epsl.2015.11.018, 2016.
Graham, A. G. C., Fretwell, P. T., Larter, R. D., Hodgson, D. A., Wilson, C. K., Tate, A. J., and Morris, P.: A new bathymetric compilation highlighting extensive paleo–ice sheet drainage on the continental shelf, South Georgia, sub-Antarctica, Geochem. Geophy. Geosy., 9, Q07011, https://doi.org/10.1029/2008GC001993, 2008.
Graham, A. G. C., Kuhn, G., Meisel, O., Hillenbrand, C.-D., Hodgson, D. A., Ehrmann, W., Wacker, L., Wintersteller, P., dos Santos Ferreira, C., Römer, M., White, D., and Bohrmann, G.: Major advance of South Georgia glaciers during the Antarctic Cold Reversal following extensive sub-Antarctic glaciation, Nat. Commun., 8, 14798, https://doi.org/10.1038/ncomms14798, 2017.
Gordon, J. E., Haynes, V., and Hubbard, A.: Recent glacier changes and climate trends on South Georgia, Glob. Planet. Change, 60, 72–84, https://doi.org/10.1016/j.gloplacha.2006.07.037, 2008.
Hall, B. L.: Holocene glacial history of Antarctica and the sub-Antarctic islands, Quaternary Sci. Rev., 28, 2213–2230, https://doi.org/10.1016/j.quascirev.2009.06.011, 2009.
Hammer, Ø.: PAleontological STatistics version 4.10 reference manual, https://www.nhm.uio.no/english/research/infrastructure/past/downloads/past4manual.pdf (last access: 13 July 2023), 2022.
Haslett, J. and Parnell, A. C.: A simple monotone process with application to radiocarbon-dated depth chronologies, J. Roy. Stat. Soc. Ser. C, 57, 399–418, https://doi.org/10.1111/j.1467-9876.2008.00623.x, 2008.
Heaton, T. J., Köhl, P., Butzin, M., Bard, E., Reimer, R. W., Austin, W. E. N., Bronk Ramsey, C., Grootes, P. M., Hughen, K. A., Kromer, B., Reimer, P. J., Adkins, J., Burke, A., Cook, M. S., Olsen, J., and Skinner, L. C.: Marine20-The marine radiocarbon age calibration curve (0–55,000 cal BP), Radiocarbon, 62, 779–820, https://doi.org/10.1017/RDC.2020.68, 2020.
Hein, J. R., Oneil, J. R., and Jones, M. G.: Origin of authigenic carbonates in sediment from the deep Bering Sea, Sedimentology, 26, 681–705, https://doi.org/10.1111/j.1365-3091.1979.tb00937.x, 1979.
Hill, M. O. and Gauch Jr., H. G.: Detrended Correspondence analysis: an improved ordination technique, Vegetatio, 42, 47–58, https://doi.org/10.1007/BF00048870, 1980.
Hodgson, D. A., Graham, A. G. C., Roberts, S. J., Bentley, M. J., Ó Cofaigh, C., Verleyen, E., Vyverman, W., Jomelli, V., Favier, V., runstein, D., Verfaillie, D., Colhoun, E. A., Saunders, K. M., Selkirk, P. M., Mackintosh, A., Hedding, D. W., Nel, W., Hall, K., McGlone, M. S., van der Putten, N., Dickens, W. A., and Smith, J. A.: Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands, Quaternary Sci. Rev., 100, 137–158, https://doi.org/10.1016/j.quascirev.2013.12.001, 2014a.
Hodgson, D. A., Graham, A. G., Griffiths, H. J., Roberts, S. J., Cofaigh, C.Ó., Bentley, M. J., and Evans, D. J.: Glacial history of sub-Antarctic South Georgia based on the sub-marine geomorphology of its fjords, Quaternary Sci. Rev., 89, 129–147, https://doi.org/10.1016/j.quascirev.2013.12.005, 2014b.
Ishman, S. E. and Sperling, M. R.: Benthic foraminiferal record of Holocene deep-water evolution in the Palmer Deep, western Antarctic Peninsula, Geology, 30, 435–438, 2002.
Kilfeather, A. A., O Cofaigh, C., Lloyd, J. M., Dowdeswell, J. A., Xu, S., and Moreton, S. G.: Ice-stream retreat and ice-shelf history in Marguerite Trough, Antarctic Peninsula: Sedimentological and foraminiferal signatures, Geol. Soc. Am. Bull., 123, 997–1015, https://doi.org/10.1130/B30282.1, 2011.
Kristan, A. K., Maiti, K., McMahon, K. W., Dance, M. A., and Polito, M. J.: Biological and geochemical proxies in sediment cores reveal shifts in marine predator population dynamics relative to historic anthropogenic exploitation and recent climate change at South Georgia Island sub-Antarctic, Polar Biol., 45, 1379–1389, https://doi.org/10.1007/s00300-022-03067-8, 2022.
Lamy, F., Kilian, R., Arz, H. W., Francois, J.-P., Kaiser, J., Prange, M., and Steinke, T.: Holocene changes in the position and intensity of the southern westerly wind belt, Nat. Geosci., 3, 695–699, https://doi.org/10.1038/ngeo959, 2010.
Lešić, N.-M., Streuff, K. T., Bohrmann, G., and Kuhn, G.: Glacimarine sediments from outer Drygalski Trough, sub-Antarctic South Georgia – evidence for extensive glaciation during the Last Glacial Maximum, Quaternary Sci. Rev., 292, 107657, https://doi.org/10.1016/j.quascirev.2022.107657, 2022.
Li, B. H., Yoon, H. I., and Park, B. K.: Foraminiferal assemblages and CaCO3 dissolution since the last deglaciation in the Maxwell Bay, King George Island, Antarctica, Mar. Geol., 169, 239–257, https://doi.org/10.1016/S0025-3227(00)00059-1, 2000.
Lisiecki, L. E. and Raymo, M. E.: A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records, Paleoceanogr. Paleocl., 20, PA1003, https://doi.org/10.1029/2004PA001071, 2005.
Mackensen, A., Schmeidl, G., Harloff, J., and Giese, M.: Deep-sea foraminifera in the South Atlantic Ocean: ecology and assemblage generation, Micropaleontology, 41, 342–358, https://doi.org/10.2307/1485808, 1995.
Majewski, W.: Benthic foraminiferal communities: distribution and ecology in Admiralty Bay, King George Island, West Antarctica, Pol. Polar Res., 26, 159–214, 2005.
Majewski, W.: Benthic foraminifera from West Antarctic fjord environments: An overview, Pol. Polar Res., 31, 61–82, https://journals.pan.pl/publication/124133, 2010.
Majewski, W. and Anderson, J. B.: Holocene foraminiferal assemblages from Firth of Tay, Antarctic Peninsula: Paleoclimate implications, Mar. Micropaleontol., 73, 135–147, https://doi.org/10.1016/j.marmicro.2009.08.003, 2009.
Majewski, W., Wellner, J. S., Szczuciński, W., and Anderson, J. B.: Holocene oceanographic and glacial changes recorded in Maxwell Bay, West Antarctica, Mar. Geol., 326–328, 67–79, https://doi.org/10.1016/j.margeo.2012.08.009, 2012.
Majewski, W., Wellner, J. S., and Anderson, J. B.: Environmental connotations of benthic foraminiferal assemblages from coastal West Antarctica, Mar. Micropaleontol., 124, 1–15, https://doi.org/10.1016/j.marmicro.2016.01.002, 2016.
Majewski, W., Szczuciński, W., and Gooday, A. J.: Unique benthic foraminiferal communities (stained) in diverse environments of sub-Antarctic fjords, South Georgia, Biogeoscience, 20, 523–544, https://doi.org/10.5194/bg-20-523-2023, 2023.
Masson, V., Vimeux, F., Jouzel, J., Morgan, V., Delmotte, M., Ciais, P., Hammer, C., Johnsen, S., Lipenkov, V. Y., Mosely-Thompson, E., Petit, J.-R., Steig, E. J., Stievenard, M., and Viakmae, R.: Holocene climate variability in Antarctica based on 11 ice-core isotopic records, Quaternary Res., 54, 348–358, https://doi.org/10.1006/qres.2000.2172, 2000.
Mayr, C., Wille, M., Haberzettl, T., Fey, M., Janssen, S., Lücke, A., Ohlendorf, C., Oliva, G., Schäbitz, F., Schleser, G. H., and Zolitschka, B.: Holocene variability of the Southern Hemisphere westerlies in Argentinean Patagonia (52° S), Quaternary Sci. Rev., 26, 579–584, https://doi.org/10.1016/j.quascirev.2006.11.013, 2007.
Meisel, O. H., Graham, A. G. C., and Kuhn, G.: A new record of post-glacial sedimentation in a glacial trough, offshore sub- =Antarctic South Georgia, EGU General Assembly 2014, Vienna, Austria, 27 April–2 May 2014, EGU2014-10852, https://meetingorganizer.copernicus.org/EGU2014/EGU2014-10852.pdf (last access: 14 June 2024), 2014.
Menounos, B., Clague, J. J., Osborn, G., Davis, P. T., Ponce, F., Goehring, B., Maurer, M., Rabassa, J., Coronato, A., and Marr, R.: Latest Pleistocene and Holocene glacier fluctuations in southernmost Tierra del Fuego, Argentina, Quaternary Sci. Rev., 77, 70–79, https://doi.org/10.1016/j.quascirev.2013.07.008, 2013.
Meredith, M. P., Watkins, J. L., Murphy, E. J., Ward, P., Bone, D. G., Thorpe, S. E., Grant, S. A., and Ladkin, R. S.: Southern ACC front to the northeast of South Georgia: Pathways, characteristics, and fluxes, J. Geophys. Res.-Ocean., 108, 3162, https://doi.org/10.1029/2001JC001227, 2003.
Milam, R. W. and Anderson, J. B.: Distribution and ecology of Recent benthonic foraminifera of the Adelie – George V continental shelf and slope, Antarctic, Mar. Micropaleontol., 6, 297–325, https://doi.org/10.1016/0031-0182(79)90107-X, 1981.
Mulvaney, R., Abram, N. J., Hindmarsh, R. C. A., Arrowsmith, C., Fleet, L., Triest, J., Sime, L. C., Alemany, O., and Foord, S.: Recent Antarctic Peninsula warming relative to Holocene climate and ice-shelf history, Nature, 489, 141–144, https://doi.org/10.1038/nature11391, 2012.
Nielsdóttir, M. C., Bibby, T. S., Moore, C. M., Hinz, D. J., Sanders, R., Whitehouse, M., Korb, R., and Achterberg, E. P.: Seasonal and spatial dynamics of iron availability in the Scotia Sea, Mar. Chem., 130/131, 62–72, https://doi.org/10.1016/j.marchem.2011.12.004, 2012.
Oksman, M., Kvorning, A. B., Larsen, S. H., Kjeldsen, K. K., Mankoff, K. D., Colgan, W., Andersen, T. J., Nørgaard-Pedersen, N., Seidenkrantz, M.-S., Mikkelsen, N., and Ribeiro.: Impact of freshwater runoff from the southwest Greenland Ice Sheet on fjord productivity since the late 19th century, The Cryosphere, 16, 2471–2491, https://doi.org/10.5194/tc-16-2471-2022, 2022.
Oppedal, L. T., Bakke, J., Paasche, Ø., Werner, J. P., and van der Bilt, E. G. M.: Cirque glacier on South Georgia shows centennial variability over the last 7000 years, Front. Earth Sci., 6, 1–18, https://doi.org/10.3389/feart.2018.00002, 2018.
Oksanen, J. and Minchin, P. R.: Instability of ordination results under changes in input data order: explanations and remedies, J. Veg. Sci., 8, 447–454, https://doi.org/10.2307/3237336, 1997.
Peck, V. L., Allen, C. S., Kender, S., McClymont, E. L., and Hodgson, D.: Oceanographic variability on the West Antarctic Peninsula during the Holocene and the influence of upper circumpolar deep water, Quaternary Sci. Rev., 119, 54–65, https://doi.org/10.1016/j.quascirev.2015.04.002, 2015.
Pedro, J. B., Bostock, H. C., Bitz, C. M., He, F., Vandergoes, M. J., Steig, E. J., Chase, B. M., Krause, C. E., Rasmussen, S. O., Markle, B. R., and Cortese, G.: The spatial extent and dynamics of the Antarctic Cold Reversal, Nat. Geosci., 9, 51–55, https://doi.org/10.1038/ngeo2580, 2016.
Perren, B. B., Hodgson, D. A., Roberts, S. J., Sime, L., van Nieuwenhuyze, W., Verleyen, E., and Vyverman, W.: Southward migration of the Southern Hemisphere westerly winds corresponds with warming climate over centennial timescales, Commun. Earth Environ., 1, 58, https://doi.org/10.1038/s43247-020-00059-6, 2020.
Pike, J. and Kemp, A. E. S.: Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial, Geology, 27, 311–314, https://doi.org/10.1130/0091-7613(1999)027<0311:DMIGOC>2.3.CO;2, 1999.
Pohlman, J. W., Riedel, M., Bauer, J. E., Canuel, E. A., Paull, C. K., Lapham, L., Grabowski, K. S., Coffin, R. B., and Spence, G. D.: Anaerobic methane oxidation in low-organic content methane seep sediments, Geochim. Cosmochim. Ac., 108, 184–201, https://doi.org/10.1016/j.gca.2013.01.022, 2013.
Putnam, A. E., Denton, G. H., Schaefer, J. M., Barrell, D. J. A., Andersen, B. G., Finkel, R. C., Schwartz, R., Doughty, A. M., Kaplan, M. R., and Schluchter, C.: Glacier advance in southern middle-latitudes during the Antarctic Cold Reversal, Nat. Geosci., 3, 700–704, https://doi.org/10.1038/ngeo962, 2010.
Roberts, S. J., Hodgson, D. A., Shelley, S., Royles, J., Griffiths, H. J., Deen, T. J., and Thorne, M. A. S.: Establishing lichenometric ages for nineteenth- and twentieth-century glacier fluctuations on South Georgia (South Atlantic), Geogr. Ann. S. A Phys. Geogr., 92, 125–139, https://doi.org/10.1111/j.1468-0459.2010.00382.x, 2010.
Rodrigues, A. R., Malus, J. C. C., de Santis Braga, E., and Eichler, B. B.: Recent benthic foraminiferal distribution and related environmental factors in Ezcurra Inlet, King George Island, Antarctica, Antarct. Sci., 22, 343–360, https://doi.org/10.1017/S0954102010000179, 2010.
Römer, M., Torres, M., Kasten, S., Kuhn, G., Graham, A. G. C., Mau, S., Little, C. T. S., Linse, K., Pape, T., Geprägs, P., Fischer, D., Wintersteller, P., Marcon, Y., Rethemeyer, J., and Bohrmann, G.: First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia, Earth Planet. Sc. Lett., 403, 166–177, https://doi.org/10.1016/j.epsl.2014.06.036, 2014.
Rosqvist, G. C., Rietti-Shati, M., and Shemesh, A.: Late glacial to middle Holocene climatic record of lacustrine biogenic silica oxygen isotopes from a Southern Ocean island, Geology, 27, 967–970, https://doi.org/10.1130/0091-7613(1999)027<0967:LGTMHC>2.3.CO;2, 1999.
Schlosser, C., Schmidt, K., Aquilina, A., Homoky, W. B., Castrillejo, M., Mills, R. A., Patey, M. D., Fielding, S., Atkinson, A., and Achterberg, E. P.: Mechanisms of dissolved and labile particulate iron supply to shelf waters and phytoplankton blooms off South Georgia, Southern Ocean, Biogeosciences, 15, 4973–4993, https://doi.org/10.5194/bg-15-4973-2018, 2018.
Schneider, A., Crémière, A., Panieri, G., Lepland, A., and Knies, J.: Diagenetic alteration of benthic foraminifera from a methane seep site on the Vestnesa Ridge (NW Svalbard margin), Deep-Sea Res. Pt. I, 123, 22–34, https://doi.org/10.1016/j.dsr.2017.03.001, 2017.
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.
Skinner, L. C., Muschitiello, F., and Scrivner, A. E.: Marine reservoir age variability over the last deglaciation: Implications for marine carbon cycling and prospects for regional radiocarbon calibrations, Paleoceanogr. Paleocl., 34, 1807–1815, https://doi.org/10.1029/2019PA003667, 2019.
Spoth, M., Hall, B., Lowell, T., Diefendorf, A. F., Corcoran, M. C., and Brickle, P.: Tracking the southern hemisphere westerlies during and since the last glacial maximum with multiproxy lake records from the Falkland Islands (52° S), Quaternary Sci. Rev., 311, 108135, https://doi.org/10.1016/j.quascirev.2023.108135, 2023.
Strelin, J. A., Kaplan, M. R., Vandergoes, M. J., Denton, H. G., and Schaefer, J. M.: Holocene glacier history of the Lago Argentino basin, Southern Patagonian Icefield, Quaternary Sci. Rev., 101, 124–145, https://doi.org/10.1016/j.quascirev.2014.06.026, 2014.
Strother, S. L., Salzmann, U., Roberts, S. J., Hodgson, D. A., Woodward, J., Nieuwenhuyze, W. V., Verleyen, E., Vyverman, W., and Moreton, S. G.: Changes in Holocene climate and the intensity of Southern Hemisphere Westerly Winds based on a high-resolution palynological record from sub-Antarctic South Georgia, Holocene, 25, 263–279, https://doi.org/10.1177/0959683614557576, 2015.
Toggweiler, J. R., Russell, J. L., and Carson, S. R.: Midlatitude westerlies, atmospheric CO2, and climate change during the ice ages, Paleoceanography, 21, PA2005, https://doi.org/10.1029/2005PA001154, 2006.
van der Bilt, W. G. M., D'Andrea, W. J., Oppedal, L. T., Bakke, J., Bjune, A. E., and Zwier, M.: Stable Southern Hemisphere westerly winds throughout the Holocene until intensification in the last two millennia, Commun. Earth Environ., 3, 186, https://doi.org/10.1038/s43247-022-00512-8, 2022.
van der Putten, N. and Verbruggen, C.: The onset of deglaciation of Cumberland Bay and Stromness Bay, South Georgia, Antarct. Sci., 17, 29–32, https://doi.org/10.1017/S0954102005002397, 2005.
van der Putten, N., Stieperaere, H., Verbruggen, C., and Ochyra, R.: Holocene palaeoecology and climate history of South Georgia (sub-Antarctica) based on a macrofossil record of bryophytes and seeds, Holocene, 14, 382–392, https://doi.org/10.1191/0959683604hl714rp, 2004.
White, D. A., Bennike, O., Melles, M., Berg, S., and Binnie, S. A.: Was South Georgia covered by an ice cap during the Last Glacial Maximum?, Geol. Soc. Lond. Sp. Publ., 461, 49–59, https://doi.org/10.1144/SP461.4, 2018.
Wycech, J., Kelly, D. C., and Marcott, S.: Effects of seafloor diagenesis on planktic foraminiferal radiocarbon ages, Geology, 44, 551–554, https://doi.org/10.1130/G37864.1, 2016.
Xia, Z., Oppedal, L. T., van der Putten, N., Bakker, J., and Yu, Z.: Ecological response of a glacier-fed peatland to late Holocene climate and glacier changes on subantarctic South Georgia, Quaternary Sci. Rev., 250, 1066792, https://doi.org/10.1016/j.quascirev.2020.106679, 2020.
Xiao, W., Esper, O., and Gersonde, R.: Last Glacial-Holocene climate variability in the Atlantic sector of the Southern Ocean, Quaternary Sci. Rev., 135, 115–137, https://doi.org/10.1016/j.quascirev.2016.01.023, 2016.
Zwier, M., van der Bilt, W. G. M., de Stigter, H., and Bjune, A. E.: Pollen evidence of variations in Holocene climate and Southern Hemisphere Westerly Wind strength on sub-Antarctic South Georgia, Holocene, 32, 147–158, https://doi.org/10.1177/09596836211060495, 2021.
Short summary
The sub-Antarctic island of South Georgia has a dynamic glacial history and is sensitive to climate change. Using benthic foraminifera and various geochemical proxies, we reconstruct inner–middle shelf productivity and infer glacial evolution since the late deglacial, identifying new mid–late-Holocene glacial readvances. Fursenkoina fusiformis acts as a good proxy for productivity.
The sub-Antarctic island of South Georgia has a dynamic glacial history and is sensitive to...
