Articles | Volume 11, issue 1
https://doi.org/10.5194/cp-11-15-2015
© Author(s) 2015. 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-11-15-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
06 Jan 2015
Research article |
| 06 Jan 2015
Photic zone changes in the north-west Pacific Ocean from MIS 4–5e
G. E. A. Swann
CORRESPONDING AUTHOR
School of Geography, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
A. M. Snelling
NERC Isotope Geosciences Facilities, British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK
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J. Micropalaeontol., 43, 165–186, https://doi.org/10.5194/jm-43-165-2024, https://doi.org/10.5194/jm-43-165-2024, 2024
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Mark A. Stevenson, Suzanne McGowan, Emma J. Pearson, George E. A. Swann, Melanie J. Leng, Vivienne J. Jones, Joseph J. Bailey, Xianyu Huang, and Erika Whiteford
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We link detailed stable isotope and biomarker analyses from the catchments of three Arctic upland lakes on Disko Island (West Greenland) to a recent dated sediment core to understand how carbon cycling has changed over the past ~500 years. We find that the carbon deposited in sediments in these upland lakes is predominately sourced from in-lake production due to the catchment's limited terrestrial vegetation and elevation and that recent increases in algal production link with climate change.
Erin L. McClymont, Heather L. Ford, Sze Ling Ho, Julia C. Tindall, Alan M. Haywood, Montserrat Alonso-Garcia, Ian Bailey, Melissa A. Berke, Kate Littler, Molly O. Patterson, Benjamin Petrick, Francien Peterse, A. Christina Ravelo, Bjørg Risebrobakken, Stijn De Schepper, George E. A. Swann, Kaustubh Thirumalai, Jessica E. Tierney, Carolien van der Weijst, Sarah White, Ayako Abe-Ouchi, Michiel L. J. Baatsen, Esther C. Brady, Wing-Le Chan, Deepak Chandan, Ran Feng, Chuncheng Guo, Anna S. von der Heydt, Stephen Hunter, Xiangyi Li, Gerrit Lohmann, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, W. Richard Peltier, Christian Stepanek, and Zhongshi Zhang
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Hannah K. Donald, Gavin L. Foster, Nico Fröhberg, George E. A. Swann, Alex J. Poulton, C. Mark Moore, and Matthew P. Humphreys
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The boron isotope pH proxy is increasingly being used to reconstruct ocean pH in the past. Here we detail a novel analytical methodology for measuring the boron isotopic composition (δ11B) of diatom opal and apply this to the study of the diatom Thalassiosira weissflogii grown in culture over a range of pH. To our knowledge this is the first study of its kind and provides unique insights into the way in which diatoms incorporate boron and their potential as archives of palaeoclimate records.
Rowan Dejardin, Sev Kender, Claire S. Allen, Melanie J. Leng, George E. A. Swann, and Victoria L. Peck
J. Micropalaeontol., 37, 25–71, https://doi.org/10.5194/jm-37-25-2018, https://doi.org/10.5194/jm-37-25-2018, 2018
V. N. Panizzo, G. E. A. Swann, A. W. Mackay, E. Vologina, M. Sturm, V. Pashley, and M. S. A. Horstwood
Biogeosciences, 13, 147–157, https://doi.org/10.5194/bg-13-147-2016, https://doi.org/10.5194/bg-13-147-2016, 2016
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Lake Baikal, Siberia, is the world's most voluminous lake. Diatoms are the most dominant primary producers in the lake and form the basis of the food chain. This paper investigated the productivity of these organisms over the course of a year with a view to understanding their preservation in sediments and their value for reconstructing past productivity in the lake. This is important when recent climate change and the pressures of pollution are having demonstrable impacts in the region.
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The stable isotope composition of benthic sponge silica skeletons (spicules) has been shown to be a source of useful palaeoceanographic information about past deep seawater chemistry. Here, we investigate the biological vital effects on silica stable isotope composition in a Southern Ocean carnivorous sponge, Asbestopluma sp. We find significant variations in isotopic composition within the specimen – in both silicon and oxygen isotopes – that appear to be related to unusual spicule growth.
A. M. Snelling, G. E. A. Swann, J. Pike, and M. J. Leng
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Jack T. R. Wilkin, Sev Kender, Rowan Dejardin, Claire S. Allen, Victoria L. Peck, George E. A. Swann, Erin L. McClymont, James D. Scourse, Kate Littler, and Melanie J. Leng
J. Micropalaeontol., 43, 165–186, https://doi.org/10.5194/jm-43-165-2024, https://doi.org/10.5194/jm-43-165-2024, 2024
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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.
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Anson W. Mackay, Vivian A. Felde, David W. Morley, Natalia Piotrowska, Patrick Rioual, Alistair W. R. Seddon, and George E. A. Swann
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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.
Mark A. Stevenson, Suzanne McGowan, Emma J. Pearson, George E. A. Swann, Melanie J. Leng, Vivienne J. Jones, Joseph J. Bailey, Xianyu Huang, and Erika Whiteford
Biogeosciences, 18, 2465–2485, https://doi.org/10.5194/bg-18-2465-2021, https://doi.org/10.5194/bg-18-2465-2021, 2021
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We link detailed stable isotope and biomarker analyses from the catchments of three Arctic upland lakes on Disko Island (West Greenland) to a recent dated sediment core to understand how carbon cycling has changed over the past ~500 years. We find that the carbon deposited in sediments in these upland lakes is predominately sourced from in-lake production due to the catchment's limited terrestrial vegetation and elevation and that recent increases in algal production link with climate change.
Erin L. McClymont, Heather L. Ford, Sze Ling Ho, Julia C. Tindall, Alan M. Haywood, Montserrat Alonso-Garcia, Ian Bailey, Melissa A. Berke, Kate Littler, Molly O. Patterson, Benjamin Petrick, Francien Peterse, A. Christina Ravelo, Bjørg Risebrobakken, Stijn De Schepper, George E. A. Swann, Kaustubh Thirumalai, Jessica E. Tierney, Carolien van der Weijst, Sarah White, Ayako Abe-Ouchi, Michiel L. J. Baatsen, Esther C. Brady, Wing-Le Chan, Deepak Chandan, Ran Feng, Chuncheng Guo, Anna S. von der Heydt, Stephen Hunter, Xiangyi Li, Gerrit Lohmann, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, W. Richard Peltier, Christian Stepanek, and Zhongshi Zhang
Clim. Past, 16, 1599–1615, https://doi.org/10.5194/cp-16-1599-2020, https://doi.org/10.5194/cp-16-1599-2020, 2020
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Hannah K. Donald, Gavin L. Foster, Nico Fröhberg, George E. A. Swann, Alex J. Poulton, C. Mark Moore, and Matthew P. Humphreys
Biogeosciences, 17, 2825–2837, https://doi.org/10.5194/bg-17-2825-2020, https://doi.org/10.5194/bg-17-2825-2020, 2020
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The boron isotope pH proxy is increasingly being used to reconstruct ocean pH in the past. Here we detail a novel analytical methodology for measuring the boron isotopic composition (δ11B) of diatom opal and apply this to the study of the diatom Thalassiosira weissflogii grown in culture over a range of pH. To our knowledge this is the first study of its kind and provides unique insights into the way in which diatoms incorporate boron and their potential as archives of palaeoclimate records.
Rowan Dejardin, Sev Kender, Claire S. Allen, Melanie J. Leng, George E. A. Swann, and Victoria L. Peck
J. Micropalaeontol., 37, 25–71, https://doi.org/10.5194/jm-37-25-2018, https://doi.org/10.5194/jm-37-25-2018, 2018
V. N. Panizzo, G. E. A. Swann, A. W. Mackay, E. Vologina, M. Sturm, V. Pashley, and M. S. A. Horstwood
Biogeosciences, 13, 147–157, https://doi.org/10.5194/bg-13-147-2016, https://doi.org/10.5194/bg-13-147-2016, 2016
Short summary
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Lake Baikal, Siberia, is the world's most voluminous lake. Diatoms are the most dominant primary producers in the lake and form the basis of the food chain. This paper investigated the productivity of these organisms over the course of a year with a view to understanding their preservation in sediments and their value for reconstructing past productivity in the lake. This is important when recent climate change and the pressures of pollution are having demonstrable impacts in the region.
K. R. Hendry, G. E. A. Swann, M. J. Leng, H. J. Sloane, C. Goodwin, J. Berman, and M. Maldonado
Biogeosciences, 12, 3489–3498, https://doi.org/10.5194/bg-12-3489-2015, https://doi.org/10.5194/bg-12-3489-2015, 2015
Short summary
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The stable isotope composition of benthic sponge silica skeletons (spicules) has been shown to be a source of useful palaeoceanographic information about past deep seawater chemistry. Here, we investigate the biological vital effects on silica stable isotope composition in a Southern Ocean carnivorous sponge, Asbestopluma sp. We find significant variations in isotopic composition within the specimen – in both silicon and oxygen isotopes – that appear to be related to unusual spicule growth.
A. M. Snelling, G. E. A. Swann, J. Pike, and M. J. Leng
Clim. Past, 10, 1837–1842, https://doi.org/10.5194/cp-10-1837-2014, https://doi.org/10.5194/cp-10-1837-2014, 2014
Related subject area
Subject: Ocean Dynamics | Archive: Marine Archives | Timescale: Pleistocene
Sea-level and monsoonal control on the Maldives carbonate platform (Indian Ocean) over the last 1.3 million years
Planktonic foraminiferal assemblages as tracers of paleoceanographic changes within the Northern Benguela current system since the Early Pleistocene
Changes in the Red Sea overturning circulation during Marine Isotope Stage 3
Glacial-interglacial Circumpolar Deep Water temperatures during the last 800,000 years: estimates from a synthesis of bottom water temperature reconstructions
Bottom water oxygenation changes in the southwestern Indian Ocean as an indicator for enhanced respired carbon storage since the last glacial inception
An Intertropical Convergence Zone shift controlled the terrestrial material supply on the Ninetyeast Ridge
Sea ice changes in the southwest Pacific sector of the Southern Ocean during the last 140 000 years
Summer sea-ice variability on the Antarctic margin during the last glacial period reconstructed from snow petrel (Pagodroma nivea) stomach-oil deposits
Variations in export production, lithogenic sediment transport and iron fertilization in the Pacific sector of the Drake Passage over the past 400 kyr
Lower oceanic δ13C during the last interglacial period compared to the Holocene
Change in the North Atlantic circulation associated with the mid-Pleistocene transition
Thermocline state change in the eastern equatorial Pacific during the late Pliocene/early Pleistocene intensification of Northern Hemisphere glaciation
A multi-proxy analysis of Late Quaternary ocean and climate variability for the Maldives, Inner Sea
Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition
Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins
Mediterranean Outflow Water variability during the Early Pleistocene
Last Glacial Maximum and deglacial abyssal seawater oxygen isotopic ratios
Subsurface North Atlantic warming as a trigger of rapid cooling events: evidence from the early Pleistocene (MIS 31–19)
Seasonal changes in glacial polynya activity inferred from Weddell Sea varves
High-latitude obliquity as a dominant forcing in the Agulhas current system
Sensitivity of Red Sea circulation to sea level and insolation forcing during the last interglacial
Sea-surface salinity variations in the northern Caribbean Sea across the Mid-Pleistocene Transition
Oceanic tracer and proxy time scales revisited
Variations in mid-latitude North Atlantic surface water properties during the mid-Brunhes (MIS 9–14) and their implications for the thermohaline circulation
A simple mixing explanation for late Pleistocene changes in the Pacific-South Atlantic benthic δ13C gradient
High Arabian Sea productivity conditions during MIS 13 – odd monsoon event or intensified overturning circulation at the end of the Mid-Pleistocene transition?
Montserrat Alonso-Garcia, Jesus Reolid, Francisco J. Jimenez-Espejo, Or M. Bialik, Carlos A. Alvarez Zarikian, Juan Carlos Laya, Igor Carrasquiera, Luigi Jovane, John J. G. Reijmer, Gregor P. Eberli, and Christian Betzler
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Arianna Valentina Del Gaudio, Aaron Avery, Gerald Auer, Werner Erwin Piller, and Walter Kurz
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Revised manuscript accepted for CP
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The Benguela Upwelling System is a region in the SE Atlantic Ocean of high biological productivity. It comprises several water masses such as the Benguela Current, the South Atlantic Central Water and the Indian Ocean Agulhas waters. We analyzed planktonic foraminifera from IODP Sites U1575-U1576 to characterize the water masses and their interplay in the Pleistocene. This defined changes in the local thermocline, which were linked to long-term Benguela Niño/Niña-like and deglaciation events.
Raphaël Hubert-Huard, Nils Andersen, Helge W. Arz, Werner Ehrmann, and Gerhard Schmiedl
Clim. Past, 20, 267–280, https://doi.org/10.5194/cp-20-267-2024, https://doi.org/10.5194/cp-20-267-2024, 2024
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We have studied the geochemistry of benthic foraminifera (micro-fossils) from a sediment core from the Red Sea. Our data show that the circulation and carbon cycling of the Red Sea during the last glacial period responded to high-latitude millennial-scale climate variability and to the orbital influence of the African–Indian monsoon system. This implies a sensitive response of the Red Sea to climate changes.
David M. Chandler and Petra M. Langebroek
EGUsphere, https://doi.org/10.5194/egusphere-2023-850, https://doi.org/10.5194/egusphere-2023-850, 2023
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Sea-level rise and global climate change caused by ice melt in Antarctica is a puzzle of feedbacks between the climate, ocean and ice sheets, over tens to thousands of years. Antarctic Ice Sheet melting is caused mainly by warm deep water from the Southern Ocean. Here, we analyse close relationships between deep water temperatures and global climate in the last 800,000 years. This knowledge can help us to better understanding how climate and sea-level are likely to change in the future.
Helen Eri Amsler, Lena Mareike Thöle, Ingrid Stimac, Walter Geibert, Minoru Ikehara, Gerhard Kuhn, Oliver Esper, and Samuel Laurent Jaccard
Clim. Past, 18, 1797–1813, https://doi.org/10.5194/cp-18-1797-2022, https://doi.org/10.5194/cp-18-1797-2022, 2022
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We present sedimentary redox-sensitive trace metal records from five sediment cores retrieved from the SW Indian Ocean. These records are indicative of oxygen-depleted conditions during cold periods and enhanced oxygenation during interstadials. Our results thus suggest that deep-ocean oxygenation changes were mainly controlled by ocean ventilation and that a generally more sluggish circulation contributed to sequestering remineralized carbon away from the atmosphere during glacial periods.
Xudong Xu, Jianguo Liu, Yun Huang, Lanlan Zhang, Liang Yi, Shengfa Liu, Yiping Yang, Li Cao, and Long Tan
Clim. Past, 18, 1369–1384, https://doi.org/10.5194/cp-18-1369-2022, https://doi.org/10.5194/cp-18-1369-2022, 2022
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Terrestrial materials in marine environments record source information and help us understand how climate and ocean impact sediment compositions. Here, we use evidence on the Ninetyeast Ridge to analyze the relationship between terrestrial material supplementation and climatic change. We find that the ITCZ controlled the rainfall in the Burman source area and that closer connections occurred between the Northern–Southern Hemisphere in the eastern Indian Ocean during the late LGM.
Jacob Jones, Karen E. Kohfeld, Helen Bostock, Xavier Crosta, Melanie Liston, Gavin Dunbar, Zanna Chase, Amy Leventer, Harris Anderson, and Geraldine Jacobsen
Clim. Past, 18, 465–483, https://doi.org/10.5194/cp-18-465-2022, https://doi.org/10.5194/cp-18-465-2022, 2022
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We provide new winter sea ice and summer sea surface temperature estimates for marine core TAN1302-96 (59° S, 157° E) in the Southern Ocean. We find that sea ice was not consolidated over the core site until ~65 ka and therefore believe that sea ice may not have been a major contributor to early glacial CO2 drawdown. Sea ice does appear to have coincided with Antarctic Intermediate Water production and subduction, suggesting it may have influenced intermediate ocean circulation 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.
María H. Toyos, Gisela Winckler, Helge W. Arz, Lester Lembke-Jene, Carina B. Lange, Gerhard Kuhn, and Frank Lamy
Clim. Past, 18, 147–166, https://doi.org/10.5194/cp-18-147-2022, https://doi.org/10.5194/cp-18-147-2022, 2022
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Past export production in the southeast Pacific and its link to Patagonian ice dynamics is unknown. We reconstruct biological productivity changes at the Pacific entrance to the Drake Passage, covering the past 400 000 years. We show that glacial–interglacial variability in export production responds to glaciogenic Fe supply from Patagonia and silica availability due to shifts in oceanic fronts, whereas dust, as a source of lithogenic material, plays a minor role.
Shannon A. Bengtson, Laurie C. Menviel, Katrin J. Meissner, Lise Missiaen, Carlye D. Peterson, Lorraine E. Lisiecki, and Fortunat Joos
Clim. Past, 17, 507–528, https://doi.org/10.5194/cp-17-507-2021, https://doi.org/10.5194/cp-17-507-2021, 2021
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The last interglacial was a warm period that may provide insights into future climates. Here, we compile and analyse stable carbon isotope data from the ocean during the last interglacial and compare it to the Holocene. The data show that Atlantic Ocean circulation was similar during the last interglacial and the Holocene. We also establish a difference in the mean oceanic carbon isotopic ratio between these periods, which was most likely caused by burial and weathering carbon fluxes.
Gloria M. Martin-Garcia, Francisco J. Sierro, José A. Flores, and Fátima Abrantes
Clim. Past, 14, 1639–1651, https://doi.org/10.5194/cp-14-1639-2018, https://doi.org/10.5194/cp-14-1639-2018, 2018
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This work documents major oceanographic changes that occurred in the N. Atlantic from 812 to 530 ka and were related to the mid-Pleistocene transition. Since ~ 650 ka, glacials were more prolonged and intense than before. Larger ice sheets may have worked as a positive feedback mechanism to prolong the duration of glacials. We explore the connection between the change in the N. Atlantic oceanography and the enhanced ice-sheet growth, which contributed to the change of cyclicity in climate.
Kim Alix Jakob, Jörg Pross, Christian Scholz, Jens Fiebig, and Oliver Friedrich
Clim. Past, 14, 1079–1095, https://doi.org/10.5194/cp-14-1079-2018, https://doi.org/10.5194/cp-14-1079-2018, 2018
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Eastern equatorial Pacific (EEP) thermocline dynamics during the intensification of Northern Hemisphere glaciation (iNHG; ~ 2.5 Ma) currently remain unclear. In light of this uncertainty, we generated geochemical, faunal and sedimentological data for EEP Site 849 (~ 2.75–2.4 Ma). We recorded a thermocline depth change shortly before the final phase of the iNHG, which supports the hypothesis that tropical thermocline shoaling may have contributed to substantial Northern Hemisphere ice growth.
Dorothea Bunzel, Gerhard Schmiedl, Sebastian Lindhorst, Andreas Mackensen, Jesús Reolid, Sarah Romahn, and Christian Betzler
Clim. Past, 13, 1791–1813, https://doi.org/10.5194/cp-13-1791-2017, https://doi.org/10.5194/cp-13-1791-2017, 2017
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We investigated a sediment core from the Maldives to unravel the interaction between equatorial climate and ocean variability of the past 200 000 years. The sedimentological, geochemical and foraminiferal data records reveal enhanced dust, which was transported by intensified winter monsoon winds during glacial conditions. Precessional fluctuations of bottom water oxygen suggests an expansion of the Arabian Sea OMZ and a varying inflow of Antarctic Intermediate Water.
Laura Gemery, Thomas M. Cronin, Robert K. Poirier, Christof Pearce, Natalia Barrientos, Matt O'Regan, Carina Johansson, Andrey Koshurnikov, and Martin Jakobsson
Clim. Past, 13, 1473–1489, https://doi.org/10.5194/cp-13-1473-2017, https://doi.org/10.5194/cp-13-1473-2017, 2017
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Continuous, highly abundant and well-preserved fossil ostracodes were studied from radiocarbon-dated sediment cores collected on the Lomonosov Ridge (Arctic Ocean) that indicate varying oceanographic conditions during the last ~50 kyr. Ostracode assemblages from cores taken during the SWERUS-C3 2014 Expedition, Leg 2, reflect paleoenvironmental changes during glacial, deglacial, and interglacial transitions, including changes in sea-ice cover and Atlantic Water inflow into the Eurasian Basin.
Thomas M. Cronin, Matt O'Regan, Christof Pearce, Laura Gemery, Michael Toomey, Igor Semiletov, and Martin Jakobsson
Clim. Past, 13, 1097–1110, https://doi.org/10.5194/cp-13-1097-2017, https://doi.org/10.5194/cp-13-1097-2017, 2017
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Global sea level rise during the last deglacial flooded the Siberian continental shelf in the Arctic Ocean. Sediment cores, radiocarbon dating, and microfossils show that the regional sea level in the Arctic rose rapidly from about 12 500 to 10 700 years ago. Regional sea level history on the Siberian shelf differs from the global deglacial sea level rise perhaps due to regional vertical adjustment resulting from the growth and decay of ice sheets.
Stefanie Kaboth, Patrick Grunert, and Lucas Lourens
Clim. Past, 13, 1023–1035, https://doi.org/10.5194/cp-13-1023-2017, https://doi.org/10.5194/cp-13-1023-2017, 2017
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This study is devoted to reconstructing Mediterranean Outflow Water (MOW) variability and the interplay between the Mediterranean and North Atlantic climate systems during the Early Pleistocene. We find indication that the increasing production of MOW aligns with the intensification of the North Atlantic overturning circulation, highlighting the potential of MOW to modulate the North Atlantic salt budget. Our results are based on new stable isotope and grain-size data from IODP 339 Site U1389.
Carl Wunsch
Clim. Past, 12, 1281–1296, https://doi.org/10.5194/cp-12-1281-2016, https://doi.org/10.5194/cp-12-1281-2016, 2016
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This paper examines the oxygen isotope data in several deep-sea cores. The question addressed is whether those data support an inference that the abyssal ocean in the Last Glacial Maximum period was significantly colder than it is today. Along with a separate analysis of salinity data in the same cores, it is concluded that a cold, saline deep ocean is consistent with the available data but so is an abyss much more like that found today. LGM model testers should beware.
I. Hernández-Almeida, F.-J. Sierro, I. Cacho, and J.-A. Flores
Clim. Past, 11, 687–696, https://doi.org/10.5194/cp-11-687-2015, https://doi.org/10.5194/cp-11-687-2015, 2015
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This manuscript presents new Mg/Ca and previously published δ18O measurements of Neogloboquadrina pachyderma sinistral for MIS 31-19, from a sediment core from the subpolar North Atlantic. The mechanism proposed here involves northward subsurface transport of warm and salty subtropical waters during periods of weaker AMOC, leading to ice-sheet instability and IRD discharge. This is the first time that these rapid climate oscillations are described for the early Pleistocene.
D. Sprenk, M. E. Weber, G. Kuhn, V. Wennrich, T. Hartmann, and K. Seelos
Clim. Past, 10, 1239–1251, https://doi.org/10.5194/cp-10-1239-2014, https://doi.org/10.5194/cp-10-1239-2014, 2014
T. Caley, J.-H. Kim, B. Malaizé, J. Giraudeau, T. Laepple, N. Caillon, K. Charlier, H. Rebaubier, L. Rossignol, I. S. Castañeda, S. Schouten, and J. S. Sinninghe Damsté
Clim. Past, 7, 1285–1296, https://doi.org/10.5194/cp-7-1285-2011, https://doi.org/10.5194/cp-7-1285-2011, 2011
G. Trommer, M. Siccha, E. J. Rohling, K. Grant, M. T. J. van der Meer, S. Schouten, U. Baranowski, and M. Kucera
Clim. Past, 7, 941–955, https://doi.org/10.5194/cp-7-941-2011, https://doi.org/10.5194/cp-7-941-2011, 2011
S. Sepulcre, L. Vidal, K. Tachikawa, F. Rostek, and E. Bard
Clim. Past, 7, 75–90, https://doi.org/10.5194/cp-7-75-2011, https://doi.org/10.5194/cp-7-75-2011, 2011
C. Siberlin and C. Wunsch
Clim. Past, 7, 27–39, https://doi.org/10.5194/cp-7-27-2011, https://doi.org/10.5194/cp-7-27-2011, 2011
A. H. L. Voelker, T. Rodrigues, K. Billups, D. Oppo, J. McManus, R. Stein, J. Hefter, and J. O. Grimalt
Clim. Past, 6, 531–552, https://doi.org/10.5194/cp-6-531-2010, https://doi.org/10.5194/cp-6-531-2010, 2010
L. E. Lisiecki
Clim. Past, 6, 305–314, https://doi.org/10.5194/cp-6-305-2010, https://doi.org/10.5194/cp-6-305-2010, 2010
M. Ziegler, L. J. Lourens, E. Tuenter, and G.-J. Reichart
Clim. Past, 6, 63–76, https://doi.org/10.5194/cp-6-63-2010, https://doi.org/10.5194/cp-6-63-2010, 2010
Cited articles
Abramson, L., Wirick, S., Lee, C., Jacobsen, C., and Brandes, J. A.: The use of soft x ray spectromicroscopy to investigate the distribution and composition of organic matter in a diatom frustule and a biomimetic analog, Deep-Sea Res. Pt.-II, 56, 1369–1380, 2009.
Antonov, J. I., Seidov, D., Boyer, T. P., Locarnini, R. A., Mishonov, A. V., Garcia, H. E., Baranova, O. K., Zweng, M. M., and Johnson, D. R.: World Ocean Atlas 2009, Volume 2: Salinity, edited by: Levitus, S., in: NOAA Atlas NESDIS 69, US Government Printing Office, Washington DC, 184 pp., 2010.
Ayers, J. M. and Lozier, M. S.: Unraveling dynamical controls on the North Pacific carbon sink, J. Geophys. Res., 117, C01017, https://doi.org/10.1029/2011JC007368, 2012.
Banse, K. and English, D. C.: Comparing phytoplankton seasonality in the eastern and western subarctic Pacific and the western Bering sea, Prog. Oceanogr., 43, 235–288, 1999.
Barr, I. D. and Clark, C. D.: Glaciers and climate in Pacific Far NE Russia during the Last Glacial Maximum, J. Quaternary Sci., 26, 227–237, 2011.
Barr, I. D. and Clark, C. D.: Late Quaternary glaciations in Far NE Russia; combining moraines, topography and chronology to assess regional and global glaciation synchrony, Quaternary Sci. Rev., 53, 72–87, 2012.
Barr, I. D. and Solomina, O.: Pleistocene and Holocene glacier fluctuations upon the Kamchatka Peninsula, Global Planet. Change, 113, 110–120, 2014.
Bigg, G. R., Clark, C. D., and Hughes, A. L. C.: A last glacial ice sheet on the Pacific Russian coast and catastrophic change arising from coupled ice–volcanic interaction, Earth Planet. Sc. Lett., 265, 559–570, 2008.
Brandriss, M. E., O'Neil, J. R., Edlund, M. B., and Stoermer, E. F.: Oxygen isotope fractionation between diatomaceous silica and water, Geochim. Cosmochim. Ac., 62, 1119–1125, 1998.
Brunelle, B. G., Sigman, D. M., Cook, M. S., Keigwin, L. D., Haug, G. H., Plessen, B., Schettler, G., and Jaccard, S. L.: Evidence from diatom-bound nitrogen isotopes for subarctic Pacific stratification during the last ice age and a link to North Pacific denitrification changes, Paleoceanography, 22, PA1215, https://doi.org/10.1029/2005PA001205, 2007.
Cassar, N., Laws, E. A., Bidigare, R. R., and Popp, B. N.: Bicarbonate uptake by Southern Ocean phytoplankton, Global Biogeochem. Cy., 18, GB2003, https://doi.org/10.1029/2003GB002116, 2004.
Cassar, N., Laws, E. A., and Popp, B. N.: Carbon isotopic fractionation by the marine diatom Phaeodactylum tricornutum under nutrient- and light-limited growth condition, Geochim. Cosmochim. Ac., 70, 5323–5335, 2006.
Chierici, M., Fransson, A., and Nojiri, Y.: Biogeochemical processes as drivers of surface fCO2 in contrasting provinces in the subarctic North Pacific Ocean, Global Biogeochem. Cy., 20, GB1009, https://doi.org/10.1029/2004GB002356, 2006.
Crespin, J., Sylvestre, F., Alexandre, A., Sonzogni, C., Pailles, C., and Perga, M.-E.: Re-examination of the temperature-dependent relationship between \chem\delta^{18O_diatom} and \chem\delta^{18O_lake water} and implications for paleoclimate inferences, J. Paleolimnol., 44, 547–557, 2010.
de Boer, A. M., Sigman, D. M., Toggweiler, J. R., and Russell, J. L.: Effect of global ocean temperature change on deep ocean ventilation, Paleoceanography, 22, PA2210, https://doi.org/10.1029/2005pa001242, 2007.
De La Rocha, C. L.: Opal-based isotopic proxies of paleoenvironmental conditions, Global Biogeochem. Cy., 20, GB4S09, https://doi.org/10.1029/2005GB002664, 2006.
De La Rocha, C. L and Bickle, M. J.: Sensitivity of silicon isotopes to whole-ocean changes in the silica cycle, Mar. Geol., 271, 267–282, 2005.
De La Rocha, C. L., Brzezinski, M. A., and DeNiro, M. J.: Fractionation of silicon isotopes by marine diatoms during biogenic silica formation, Geochim. Cosmochim. Ac., 61, 5051–5056, 1997.
Dodd, J. P. and Sharp, Z. D.: A laser fluorination method for oxygen isotope analysis of biogenic silica and a new oxygen isotope calibration of modern diatoms in freshwater environments, Geochim. Cosmochim. Ac., 74, 1381–1390, 2010.
Emile-Geay, J., Cane, M. A., Naik, N., Seager, R., Clement, A. C., and van Green, A.: Warren revisited: atmospheric freshwater fluxes and "Why is no deep water formed in the North Pacific", J. Geophys. Res., 108, 3178, https://doi.org/10.1029/2001JC001058, 2003.
Fischer, H., Schmitt, J., Lüthi, D., Stocker, T. F., Tschumi, T., Parekh, P., Joos, F., Köhler, P., Völker, C., Gersonde, R., Barbante, C., Le Floch, M., Raynaud, D., and Wolff, E.: The role of Southern Ocean processes in orbital and millennial CO2 variations – a synthesis, Quaternary Sci. Rev., 29, 193–205, 2010.
Galbraith, E. D., Jaccard, S. L., Pedersen, T. F., Sigman, D. M., Haug, G. H., Cook, M., Southon, J. R., and Francois, R.: Carbon dioxide release from the North Pacific abyss during the last deglaciation, Nature, 449, 890–894, 2007.
Galbraith, E. D., Kienast, M., Jaccard, S. L., Pedersen, T. F., Brunelle, B. G., Sigman, D. M., and Kiefer, T.: Consistent relationship between global climate and surface nitrate utilization in the western subarctic Pacific throughout the last 500 ka, Paleoceanography, 23, PA2212, https://doi.org/10.1029/2007PA001518, 2008.
Gebhardt, H., Sarnthein, M., Grootes, P. M., Kiefer, T., Kuehn, H., Schmieder, F., and Rohl, U.: Paleonutrient and productivity records from the subarctic North Pacific for Pleistocene glacial terminations I to V, Paleoceanography, 23, PA4212, https://doi.org/10.1029/2007PA001513, 2008.
Gebbie, G. and Huybers, P.: How is the ocean filled?, Geophys. Res. Lett., 38, L06604, https://doi.org/10.1029/2011GL046769, 2011.
Harrison, P. J., Boyd, P. W., Varela, D. E., Takeda, S., Shiomoto, A., and Odate, T.: Comparison of factors controlling phytoplankton productivity in the NE and NW subarctic Pacific gyres, Prog. Oceanogr., 43, 205–234, 1999.
Haug, G. H. and Sigman, D. M.: Polar twins, Nat. Geosci., 2, 91–92, 2009.
Haug, G. H., Ganopolski, A., Sigman, D. M., Rosell-Mele, A., Swann, G. E. A., Tiedemann, R., Jaccard, S, Bollmann, J., Maslin, M. A., Leng, M. J., and Eglinton, G.: North Pacific seasonality and the glaciation of North America 2.7 million years ago, Nature, 433, 821–825, 2005.
Hecky, R. E., Mopper, K., Kilham, P., and Degens, E. T.: The amino acid and sugar composition of diatom cell-walls, Mar. Biol., 19, 323–331, 1973.
Hillebrand, H., Dürselen, C.-D., Kirschtel, D., Pollingher, U., and Zohary, T.: Biovolume calculation for pelagic and benthic microalgae, J. Phycol., 35, 403–424, 1999.
Honda, M. C., Imai, K., Nojiri, Y., Hoshi, F., Sugawarad, T., and Kusakabe, M.: The biological pump in the northwestern North Pacific based on fluxes and major components of particulate matter obtained by sediment-trap experiments (1997–2000), Deep-Sea Res. Pt.-II, 49, 5595–5625, 2002.
Hsu, S.-C., Huh, C.-A., Lin, C.-Y., Chen, W.-N., Mahowald, N. M., Liu, S.-C., Chou, C. C. K., Liang, M.-C., Tsai, C.-J., Lin, F.-J., Chen, J.-P., and Huang, Y.-T.: Dust transport from non-East Asian sources to the North Pacific, Geophys. Res. Lett., 39, L12804, https://doi.org/10.1029/2012GL051962, 2012.
Hurrell, E. R., Barker, P. A., Leng, M. J, Vane, C. H., Wynn, P., Kendrick, C. P., Verschuren, D., and Street-Perrott, F.: Developing a methodology for carbon isotope analysis of lacustrine diatoms, Rapid Commun. Mass Sp., 25, 1567–1574, 2011.
Jaccard, S. L., Haug, G. H., Sigman, D. M., Pedersen, T. F., Thierstein, H. R., and Röhl, U.: Glacial/interglacial changes in subarctic North Pacific stratification, Science, 308, 1003–1006, 2005.
Jaccard, S. L., Galbraith, E. D., Sigman, D. M., Haug, G. H., Francois, R., Pedersen, T. F., Dulski, P., and Thierstein, H. R.: Subarctic Pacific evidence for a glacial deepening of the oceanic respired carbon pool, Earth Planet. Sc. Lett., 277, 156–165, 2009.
Jaccard, S. L., Galbraith, E. D., Sigman, D. M., and Haug, G. H.: A pervasive link between Antarctic ice core and subarctic Pacific sediment records over the past 800 kyrs, Quaternary Sci. Rev., 29, 206–212, 2010.
Jacot des Combes, H., Esper, O., De La Rocha, C. L., Abelmann, A., Gersonde, R., Yam, R., and Shemesh, A.: Diatom δ13C, δ15N, and C / N since the Last Glacial Maximum in the Southern Ocean: potential impact of species composition, Paleoceanography, 23, PA4209, https://doi.org/10.1029/2008PA001589, 2008.
Jouzel, J., Masson-Delmotte, V., Cattani, O., Dreyfus, G., Falourd, S., Hoffmann, G., Minster, B., Nouet, J., Barnola, J. M., Chappellaz, J., Fischer, H., Gallet, J. C., Johnsen, S., Leuenberger, M., Loulergue, L., Luethi, D., Oerter, H., Parrenin, F., Raisbeck, G., Raynaud, D., Schilt, A., Schwander, J., Selmo, E., Souchez, R., Spahni, R., Stauffer, B., Steffensen, J. P., Stenni, B., Stocker, T. F., Tison, J. L., Werner, M., and Wolff, E. W.: Orbital and millennial Antarctic climate variability over the past 800000 years, Science, 371, 793–796, 2007.
Kienast, S. S., Hendy, I. L., Crusius, J., Pedersen, T. F., and Calvert, S. E.: Export production in the subarctic North Pacific over the last 800 kyrs: no evidence for iron fertilization?, J. Oceanogr., 60, 189–203, 2004.
Kohfeld, K. E. and Chase, Z.: Controls on deglacial changes in biogenic fluxes in the North Pacific Ocean, Quaternary Sci. Rev., 30, 3350–3363, 2011.
Kröger, N., Deutzmann, R., and Sumper, M.: Polycationic peptides from diatom biosilica that direct silica nanosphere formation, Science, 286, 1129–1132, 1999.
Lam, P. J. and Bishop, J. K. B.: The paleoclimatic record provided by eolian deposition in the deep-sea: the geologic history of wind, Geophys. Res. Lett., 35, L07608, https://doi.org/10.1029/2008GL033294, 2008.
Lam, P. J., Robinson, L. F., Blusztajn, J., Li, C., Cook, M. S., McManus, J. F., and Keigwin, L. D.: Transient stratification as the cause of the North Pacific productivity spike during deglaciation, Nat. Geosci., 6, 622–626, 2013.
Laws, E. A., Popp, B. N., Bidigare, R. R., Kennicutt, M. C., and Macko, S. A.: Dependence of phytoplankton carbon isotopic composition on growth rate and (CO2)aq: theoretical considerations and experimental results, Geochim. Cosmochim. Ac., 59, 1131–1138, 1995.
Laws, E. A., Bidigare, R. R., and Popp, N. B.: Effect of growth rate and CO2 concentration on carbon isotope fractionation by the marine diatom Phaeodactylum tricornutum, Limnol. Ocanogr., 42, 1552–1560, 1997.
Laws, E. A., Popp, B. N., Cassar, N., and Tanimoto, J.: 13C discrimination patterns in oceanic phytoplankton: likely influence of CO2 concentrating mechanisms, and implications for palaeoreconstructions, Funct. Plant Biol., 29, 323–333, 2002.
LeGrande, A. N. and Schmidt, G. A.: Global gridded data set of the oxygen isotopic composition in seawater, Geophys. Res. Lett., 33, L12604, https://doi.org/10.1029/2006GL026011, 2006.
Leng, M. J. and Sloane, H. J.: Combined oxygen and silicon isotope analysis of biogenic silica, J. Quaternary Sci., 23, 313–319, 2008.
Locarnini, R. A., Mishonov, A. V., Antonov, J. I., Boyer, T. P., Garcia, H. E., Baranova, O. K., Zweng, M. M., and Johnson, D. R.: World Ocean Atlas 2009, Volume 1: Temperature, in: NOAA Atlas NESDIS 68, edited by: Levitus, S., US Government Printing Office, Washington DC, 184 pp., 2010.
Mann, D. G.: The species concept in diatoms, Phycologia, 38, 437–495, 1999.
Marinov, I., Follows, M., Gnanadesikan, A., Sarmiento, J. L., and Slater, R. D.: How does ocean biology affect atmospheric pCO2? Theory and models, J. Geophys. Res., 113, C07032, https://doi.org/10.1029/2007JC004598, 2008.
Martin, C. L. and Tortell, P. D.: Bicarbonate transport and extracellular carbonic anhydrase activity in Bering Sea phytoplankton assemblages: results from isotope disequilibrium experiments, Limnol. Oceanogr., 51, 2111–2121, 2006.
Martin, C. L. and Tortell, P. D.: Bicarbonate transport and extracellular carbonic anhydrase in marine diatoms, Physiol. Plantarum, 133, 106–116, 2008.
Martínez-Garcia, A., Rosell-Melé, A., McClymont, E. L., Gersonde, R., and Haug, G. H.: Subpolar link to the emergence of the modern equatorial Pacific cold tongue, Science, 328, 1550–1553, 2010.
Menviel, L., Timmermann, A., Timm, O., Mouchet, A., Abe-Ouchi, A., Chikamoto, M. O., Harada, N., Ohgaito, R., and Okazaki, Y.: Removing the North Pacific halocline: effects on global climate, ocean circulation and the carbon cycle, Deep-Sea Res. Pt.-II, 61–64, 106–113, 2012.
Moschen, R., Lücke, A., and Schleser, G.: Sensitivity of biogenic silica oxygen isotopes to changes in surface water temperature and palaeoclimatology, Geophys. Res. Lett., 32, L07708, https://doi.org/10.1029/2004GL022167, 2005.
Narita, H., Sato, M., Tsunogai, S., Murayama, M., Ikehara, M., Nakatsuka, T., Wakatsuchi, M., Harada, N., and Ujiié, Y.: Biogenic opal indicating less productive northwestern North Pacific during the glacial ages, Geophys. Res. Lett., 29, 1732, https://doi.org/10.1029/2001GL014320, 2002.
Nelson, D. M., Tréguer, P., Brzezinski, M. A., Leynaert, A., and Quéguiner, B.: Production and dissolution of biogenic silica in the ocean: revised global estimates, comparison with regional data and relationship to biogenic sedimentation, Global Biogeochem. Cy., 9, 359–372, 1995.
North Greenland Ice Core Project members: High-resolution record of Northern Hemisphere climate extending into the last interglacial period, Nature, 431, 147–151, 2004.
Nie, J., King, J., Liu, Z., Clemens, S., Prell, W., and Fang, X.: Surface-water freshening: a cause for the onset of North Pacific stratification from 2.75 Ma onward?, Global Planet. Change, 64, 49–52, 2008.
Nishioka, J., Ono, T., Saito, H., Nakatsuka, T., Takeda, S., Yoshimura, T., Suzuki, K., Kuma, K., Nakabayashi, S., Tsumune, D., Mitsudera, H., Johnson, W. K., and Tsuda, A.: Iron supply to the western subarctic Pacific: importance of iron export from the Sea of Okhotsk, J. Geophys. Res., 112, C10012, https://doi.org/10.1029/2006JC004055, 2007.
Nürnberg, D., Dethleff, D., Tiedemann, R., Kaiser, A., and Gorbarenko, S. A.: Okhotsk Sea ice coverage and Kamchatka glaciation over the last 350 ka – evidence from ice-rafted debris and planktonic δ18O, Palaeogeogr. Palaeocl., 310, 191–205, 2011.
Onodera, J., Takahashi, K., and Honda, M. C.: Pelagic and coastal diatom fluxes and the environmental changes in the northwestern North Pacific during 1997–2000, Deep-Sea Res. Pt.-II, 52, 2218–2239, 2005.
Pichevin, L. E., Reynolds, B. C., Ganeshram, R. S., Cacho, I., Pena, L., Keefe, K., and Ellam, R. M.: Enhanced carbon pump inferred from relaxation of nutrient limitation in the glacial ocean, Nature, 459, 1114–1118, 2009.
Popp, B. N., Laws, E. A., Bidigare, R. R., Dore, J. E., Hanson, K. L., and Wakeham, S. G.: Effect of phytoplankton cell geometry on carbon isotopic fractionation, Geochim. Cosmochim. Ac., 62, 69–77, 1998.
Rae, J. W. B., Sarnthein, M., Foster, G. L., Ridgwell, A., Grootes, P. M., and Elliott, T.: Deep water formation in the North Pacific and deglacial CO2 rise, Paleoceanography, 29, 645–667, 2014.
Rau, G. H., Riebeseell, U., and Wolf-Gladrow, D.: A model of photosynthetic 13C fractionation by marine phytoplankton based on diffusive molecular CO2 uptake, Mar. Ecol.-Prog. Ser., 133, 275–285, 1996.
Rau, G. H., Riebesell, U., and Wolf-Gladrow, D.: CO2 aq-dependent photosynthetic 13C fractionation in the ocean: a model versus measurements, Global Biogeochem. Cy., 11, 267–278, 1997.
Rau, G. H., Chavez, F. P., and Friederich, G. E.: Plankton 13C/12C variations in Monterey Bay, California: evidence of non-diffusive inorganic carbon uptake by phytoplankton in an upwelling environment, Deep-Sea Res. Pt.-I, 48, 79–94, 2001.
Reinfelder, J. R., Kraepiel, A. M. L., and Morel, F. M. M.: Unicellular C4 photosynthesis in a marine diatom, Nature, 407, 996–999, 2000.
Reynolds, B. C., Frank, M., and Halliday, A. N.: Silicon isotope fractionation during nutrient utilization in the North Pacific, Earth Planet. Sc. Lett., 244, 431–443, 2006.
Sarnthein, M., Gebhardt, H., Kiefer, T., Kucera, M., Cook, M., and Erlenkeuser, H.: Mid Holocene origin of the sea-surface salinity low in the subarctic North Pacific, Quaternary Sci. Rev., 23, 2089–2099, 2004.
Schmittner, A.: Decline of the marine ecosystem caused by a reduction in the Atlantic overturning circulation, Nature, 434, 628–633, 2005.
Serno, S., Winckler, G., Anderson, R. F., Hayes, C. T., Ren, H., Gersonde, R., and Haug, G. H.: Using the natural spatial pattern of marine productivity in the Subarctic North Pacific to evaluate paleoproductivity proxies, Paleoceanography, 29, 438–453, 2014.
Shigemitsu, M., Narita, H., Watanabe, Y. W., Harada, N., and Tsunogai, S.: Ba, Si, U, Al, Sc, La, Th, C and 13C/12C in a sediment core in the western subarctic Pacific as proxies of past biological production, Mar. Chem., 106, 442–455, 2007.
Shigemitsu, M., Watanabe, Y. W., and Narita, H.: Time variations of \chem\delta^{15N} of organic nitrogen in deep western subarctic Pacific sediment over the last 145 ka, Geochem. Geophy. Geosy., 9, Q10012, https://doi.org/10.1029/2008GC001999, 2008.
Shigemitsu, M., Okunishi, T., Nishioka, J., Sumata, H., Hashioka, T., Aita, M. N., Smith, S. L., Yoshie, N., Okada, N., and Yamanaka, Y.: Development of a one-dimensional ecosystem model including the iron cycle applied to the Oyashio region, western subarctic Pacific, J. Geophys. Res., 117, C06021, https://doi.org/10.1029/2011JC007689, 2012.
Sigman, D. M., Jaccard, S. L., and Haug, G. H.: Polar ocean stratification in a cold climate, Nature, 428, 59–63, 2004.
Sigman, D. M., Hain, M. P., and Haug, G. H.: The polar ocean and glacial cycles in atmospheric CO2 concentration, Nature, 47–55, 2010.
Sültemeyer, D., Schmidt, C., and Fock, H. P.: Carbonic anhydrases in higher plants and aquatic microorganisms, Physiol. Plantarum, 88, 179–190, 1993.
Sumper, M. and Kröger, N.: Silica formation in diatoms: the function of long-chain polyamines and silaffins, J. Mater. Chem., 14, 2059–2065, 2004.
Sun, Y., Clemens, S. C., An, Z., and Yu, Z.: Astronomical timescale and palaeoclimatic implication of stacked 3.6-Myr monsoon records from the Chinese Loess Plateau, Quaternary Sci. Rev., 25, 33–48, 2006.
Swann, G. E. A.: Salinity changes in the North West Pacific Ocean during the late Pliocene/early Quaternary from 2.73 Ma to 2.53 Ma, Earth Planet. Sc. Lett., 297, 332–338, 2010.
Swann, G. E. A. and Leng, M. J.: A review of diatom δ18O in palaeoceanography, Quaternary Sci. Rev., 28, 384–398, 2009.
Swann, G. E. A., Maslin, M. A., Leng, M. J., Sloane, H. J., and Haug, G. H.: Diatom δ18O evidence for the development of the modern halocline system in the subarctic northwest Pacific at the onset of major Northern Hemisphere glaciation, Paleoceanography, 21, PA1009, https://doi.org/10.1029/2005PA001147, 2006.
Swann, G. E. A., Leng, M. J., Sloane, H. J., and Maslin, M. A.: Isotope offsets in marine diatom δ18O over the last 200 ka, J. Quaternary Sci., 23, 389–400, 2008.
Swift, D. M. and Wheeler, A. P.: Evidence of an organic matrix from diatom biosilica, J. Phycol., 28, 202–290, 1992.
Takahashi, K.: Seasonal fluxes of pelagic diatoms in the subarctic Pacific, 1982–1983, Deep-Sea Res., 33, 1225–1251, 1986.
Takahashi, K., Hisamichi, K., Yanada, M., and Maita, Y.: Seasonal changes of marine phytoplankton productivity: a sediment trap study, Kaiyo Monthly, 10, 109–115, 1996.
Takahashi, T., Sutherland, S. C., Feely, R. A., and Wanninkhof, R.: Decadal change of the surface water pCO2 in the North Pacific: a synthesis of 35 years of observations, J. Geophys. Res., 111, C07S05, https://doi.org/10.1029/2005JC003074, 2006.
Tortell, P. D. and Morel, F. M. M.: Sources of inorganic carbon for phytoplankton in the eastern Subtropical and equatorial Pacific Ocean, Limnol. Oceanogr., 47, 1012–1022, 2002.
Tortell, P. D., Reinfelder, J. R., and Morel, F. M. M.: Active uptake of bicarbonate by diatoms, Nature, 390, 243–244, 1997.
Tortell, P. D., Martin, C. L., and Corkum, M. E.: Inorganic carbon uptake and intracellular assimilation by subarctic Pacific phytoplankton assemblages, Limnol. Oceanogr., 51, 2102–2110, 2006.
Tortell, P. D., Payne, C., Gueguen, C., Strzepek, R. F., Boyd, P. W., and Rost, B.: Inorganic carbon uptake by Southern Ocean phytoplankton, Limnol. Oceanogr., 45, 1485–1500, 2008.
Tsuda, A., Takeda, S., Saito, H., Nishioka, J., Nojiri, Y., Kudo, I., Kiyosawa, H., Shiomoto, A., Imai, K., Ono, T., Shimamoto, A., Tsumune, D., Yoshimura, T., Aono, T., Hinuma, A., Kinugasa, M., Suzuki, K., Sohrin, Y., Noiri, Y., Tani, H., Deguchi, Y., Tsurushima, N., Ogawa, H., Fukami, K., Kuma, K., and Saino, T.: A mesoscale iron enrichment in the Western Subarctic Pacific induces a large centric diatom bloom, Science, 300, 958–961, 2003.
Whitney, F. A., Bograd, S. J., and Ono, T.: Nutrient enrichment of the subarctic Pacific Ocean pycnocline, Geophys. Res. Lett., 40, 2200–2205, 2013.
Yuan, W. and Zhang, J.: High correlations between Asian dust events and biological productivity in the western North Pacific, Geophys. Res. Lett., 33, L07603, https://doi.org/10.1029/2005GL025174, 2006.
Zhang, Y. G., Ji, J., Balsam, W., Liu, L., and Chen, J.: Mid-Pliocene Asian monsoon intensification and the onset of Northern Hemisphere glaciation, Geology, 37, 599–602, 2009.
Short summary
New diatom isotope records are presented alongside existing geochemical and isotope records to document changes in the photic zone, including nutrient supply and the efficiency of the soft-tissue biological pump, between MIS 4 and MIS 5e in the subarctic north-west Pacific Ocean. The results provide evidence for temporal changes in the strength and efficiency of the regional soft-tissue biological pump, altering the ratio of regenerated to preformed nutrients in the water.
New diatom isotope records are presented alongside existing geochemical and isotope records to...
