Articles | Volume 20, issue 1
https://doi.org/10.5194/cp-20-121-2024
© 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/cp-20-121-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
16 Jan 2024
Research article |
| 16 Jan 2024
| 16 Jan 2024
Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
now at: Departamento de Geoquímica, Universidade Federal Fluminense, Niterói, Brazil
Wanyee Wong
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Department of Geosciences, University of Bremen, Bremen, Germany
now at: NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, Norway
Jens Hefter
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Hendrik Grotheer
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Tommaso Tesi
Institute of Polar Sciences – National Research Council, Bologna, Italy
Torben Gentz
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Karin Zonneveld
MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Gesine Mollenhauer
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Department of Geosciences, University of Bremen, Bremen, Germany
MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
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Jannik Martens, Evgeny Romankevich, Igor Semiletov, Birgit Wild, Bart van Dongen, Jorien Vonk, Tommaso Tesi, Natalia Shakhova, Oleg V. Dudarev, Denis Kosmach, Alexander Vetrov, Leopold Lobkovsky, Nikolay Belyaev, Robie W. Macdonald, Anna J. Pieńkowski, Timothy I. Eglinton, Negar Haghipour, Salve Dahle, Michael L. Carroll, Emmelie K. L. Åström, Jacqueline M. Grebmeier, Lee W. Cooper, Göran Possnert, and Örjan Gustafsson
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Maria-Elena Vorrath, Juliane Müller, Lorena Rebolledo, Paola Cárdenas, Xiaoxu Shi, Oliver Esper, Thomas Opel, Walter Geibert, Práxedes Muñoz, Christian Haas, Gerhard Kuhn, Carina B. Lange, Gerrit Lohmann, and Gesine Mollenhauer
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Sebastian Wetterich, Alexander Kizyakov, Michael Fritz, Juliane Wolter, Gesine Mollenhauer, Hanno Meyer, Matthias Fuchs, Aleksei Aksenov, Heidrun Matthes, Lutz Schirrmeister, and Thomas Opel
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Bingbing Wei, Guodong Jia, Jens Hefter, Manyu Kang, Eunmi Park, Shizhu Wang, and Gesine Mollenhauer
Biogeosciences, 17, 4489–4508, https://doi.org/10.5194/bg-17-4489-2020, https://doi.org/10.5194/bg-17-4489-2020, 2020
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Gerard J. M. Versteegh, Alexander J. P. Houben, and Karin A. F. Zonneveld
Biogeosciences, 17, 3545–3561, https://doi.org/10.5194/bg-17-3545-2020, https://doi.org/10.5194/bg-17-3545-2020, 2020
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Oscar E. Romero, Karl-Heinz Baumann, Karin A. F. Zonneveld, Barbara Donner, Jens Hefter, Bambaye Hamady, Vera Pospelova, and Gerhard Fischer
Biogeosciences, 17, 187–214, https://doi.org/10.5194/bg-17-187-2020, https://doi.org/10.5194/bg-17-187-2020, 2020
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Thomas Opel, Julian B. Murton, Sebastian Wetterich, Hanno Meyer, Kseniia Ashastina, Frank Günther, Hendrik Grotheer, Gesine Mollenhauer, Petr P. Danilov, Vasily Boeskorov, Grigoriy N. Savvinov, and Lutz Schirrmeister
Clim. Past, 15, 1443–1461, https://doi.org/10.5194/cp-15-1443-2019, https://doi.org/10.5194/cp-15-1443-2019, 2019
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Maria-Elena Vorrath, Juliane Müller, Oliver Esper, Gesine Mollenhauer, Christian Haas, Enno Schefuß, and Kirsten Fahl
Biogeosciences, 16, 2961–2981, https://doi.org/10.5194/bg-16-2961-2019, https://doi.org/10.5194/bg-16-2961-2019, 2019
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The study highlights new approaches in the investigation of past sea ice in Antarctica to reconstruct the climate conditions in earth's history and reveal its future development under global warming. We examined the distribution of organic remains from different algae at the Western Antarctic Peninsula and compared it to fossil and satellite records. We evaluated IPSO25 – the sea ice proxy for the Southern Ocean with 25 carbon atoms – as a useful tool for sea ice reconstructions in this region.
Eunmi Park, Jens Hefter, Gerhard Fischer, Morten Hvitfeldt Iversen, Simon Ramondenc, Eva-Maria Nöthig, and Gesine Mollenhauer
Biogeosciences, 16, 2247–2268, https://doi.org/10.5194/bg-16-2247-2019, https://doi.org/10.5194/bg-16-2247-2019, 2019
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We analyzed GDGT-based proxy temperatures in the polar oceans. In the eastern Fram Strait (79° N), the nutrient distribution may determine the depth habit of Thaumarchaeota and thus the proxy temperature. In the Antarctic Polar Front (50° S), the contribution of Euryarchaeota or the nonlinear correlation between the proxy values and temperatures may cause the warm biases of the proxy temperatures relative to SSTs.
Birgit Wild, Natalia Shakhova, Oleg Dudarev, Alexey Ruban, Denis Kosmach, Vladimir Tumskoy, Tommaso Tesi, Hanna Joß, Helena Alexanderson, Martin Jakobsson, Alexey Mazurov, Igor Semiletov, and Örjan Gustafsson
The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-229, https://doi.org/10.5194/tc-2018-229, 2018
Revised manuscript not accepted
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The thaw and degradation of subsea permafrost on the Arctic Ocean shelves is one of the key uncertainties concerning natural greenhouse gas emissions since difficult access limits the availability of observational data. In this study, we describe sediment properties and age constraints of a unique set of three subsea permafrost cores from the East Siberian Arctic Shelf, as well as content, origin and degradation state of organic matter at the current thaw front.
Alessandra D'Angelo, Federico Giglio, Stefano Miserocchi, Anna Sanchez-Vidal, Stefano Aliani, Tommaso Tesi, Angelo Viola, Mauro Mazzola, and Leonardo Langone
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A 6-year time series of physical parameters and particle fluxes collected by a mooring in Kongsfjorden (Svalbard) suggests that the subglacial and watershed run-off driven by air temperature are the main processes affecting the lithogenic supply. As the Arctic temperature rises, glacier material will increase accordingly. The winter inflow of warm Atlantic waters is progressively increasing, hampering the nutrient supply from the bottom waters and severely reducing the biological production.
Julie Lattaud, Frédérique Kirkels, Francien Peterse, Chantal V. Freymond, Timothy I. Eglinton, Jens Hefter, Gesine Mollenhauer, Sergio Balzano, Laura Villanueva, Marcel T. J. van der Meer, Ellen C. Hopmans, Jaap S. Sinninghe Damsté, and Stefan Schouten
Biogeosciences, 15, 4147–4161, https://doi.org/10.5194/bg-15-4147-2018, https://doi.org/10.5194/bg-15-4147-2018, 2018
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Volker Brüchert, Lisa Bröder, Joanna E. Sawicka, Tommaso Tesi, Samantha P. Joye, Xiaole Sun, Igor P. Semiletov, and Vladimir A. Samarkin
Biogeosciences, 15, 471–490, https://doi.org/10.5194/bg-15-471-2018, https://doi.org/10.5194/bg-15-471-2018, 2018
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Kirsi Keskitalo, Tommaso Tesi, Lisa Bröder, August Andersson, Christof Pearce, Martin Sköld, Igor P. Semiletov, Oleg V. Dudarev, and Örjan Gustafsson
Clim. Past, 13, 1213–1226, https://doi.org/10.5194/cp-13-1213-2017, https://doi.org/10.5194/cp-13-1213-2017, 2017
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In this study we investigate land-to-ocean transfer and the fate of permafrost carbon in the East Siberian Sea from the early Holocene until the present day. Our results suggest that there was a high input of terrestrial organic carbon to the East Siberian Sea during the last glacial–interglacial period caused by permafrost destabilisation. This material was mainly characterised as relict Pleistocene permafrost deposited via coastal erosion as a result of the sea level rise.
Tommaso Tesi, Marc C. Geibel, Christof Pearce, Elena Panova, Jorien E. Vonk, Emma Karlsson, Joan A. Salvado, Martin Kruså, Lisa Bröder, Christoph Humborg, Igor Semiletov, and Örjan Gustafsson
Ocean Sci., 13, 735–748, https://doi.org/10.5194/os-13-735-2017, https://doi.org/10.5194/os-13-735-2017, 2017
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Recent Arctic studies suggest that sea-ice decline and permafrost thawing will affect the phytoplankton in the Arctic Ocean. However, in what way the plankton composition will change as the warming proceeds remains elusive. Here we show that the carbon composition of plankton might change as a function of the enhanced terrestrial organic carbon supply and progressive sea-ice thawing.
Jorien E. Vonk, Tommaso Tesi, Lisa Bröder, Henry Holmstrand, Gustaf Hugelius, August Andersson, Oleg Dudarev, Igor Semiletov, and Örjan Gustafsson
The Cryosphere, 11, 1879–1895, https://doi.org/10.5194/tc-11-1879-2017, https://doi.org/10.5194/tc-11-1879-2017, 2017
Annette Hahn, Enno Schefuß, Sergio Andò, Hayley C. Cawthra, Peter Frenzel, Martin Kugel, Stephanie Meschner, Gesine Mollenhauer, and Matthias Zabel
Clim. Past, 13, 649–665, https://doi.org/10.5194/cp-13-649-2017, https://doi.org/10.5194/cp-13-649-2017, 2017
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Our study demonstrates that a source to sink analysis in the Gouritz catchment can be used to obtain valuable paleoclimatic information form the year-round rainfall zone. In combination with SST reconstructions these data are a valuable contribution to the discussion of Southern Hemisphere palaeoenvironments and climate variability (in particular atmosphere–ocean circulation and hydroclimate change) in the South African Holocene.
Shuwen Sun, Enno Schefuß, Stefan Mulitza, Cristiano M. Chiessi, André O. Sawakuchi, Matthias Zabel, Paul A. Baker, Jens Hefter, and Gesine Mollenhauer
Biogeosciences, 14, 2495–2512, https://doi.org/10.5194/bg-14-2495-2017, https://doi.org/10.5194/bg-14-2495-2017, 2017
Vera D. Meyer, Jens Hefter, Gerrit Lohmann, Lars Max, Ralf Tiedemann, and Gesine Mollenhauer
Clim. Past, 13, 359–377, https://doi.org/10.5194/cp-13-359-2017, https://doi.org/10.5194/cp-13-359-2017, 2017
Joan A. Salvadó, Tommaso Tesi, Marcus Sundbom, Emma Karlsson, Martin Kruså, Igor P. Semiletov, Elena Panova, and Örjan Gustafsson
Biogeosciences, 13, 6121–6138, https://doi.org/10.5194/bg-13-6121-2016, https://doi.org/10.5194/bg-13-6121-2016, 2016
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Fluvial discharge and coastal erosion of the permafrost-dominated East Siberian Arctic delivers large quantities of terrigenous organic carbon (Terr-OC) to marine waters. We assessed its fate and composition in different marine pools with a suite of biomarkers. The dissolved organic carbon is transporting off-shelf “young” and fresh vascular plant material, while sedimentary and near-bottom particulate organic carbon preferentially carries old organic carbon released from thawing permafrost.
Gerhard Fischer, Johannes Karstensen, Oscar Romero, Karl-Heinz Baumann, Barbara Donner, Jens Hefter, Gesine Mollenhauer, Morten Iversen, Björn Fiedler, Ivanice Monteiro, and Arne Körtzinger
Biogeosciences, 13, 3203–3223, https://doi.org/10.5194/bg-13-3203-2016, https://doi.org/10.5194/bg-13-3203-2016, 2016
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Particle fluxes at the Cape Verde Ocean Observatory in the eastern tropical North Atlantic for the period December 2009 until May 2011 are discussed based on deep sediment trap time-series data collected at 1290 and 3439 m water depths. The typically open-ocean flux pattern with weak seasonality is modified by the appearance of a highly productive and low oxygen eddy in winter 2010. The eddy passage was accompanied by high biogenic and lithogenic fluxes, lasting from December 2009 to May 2010.
S. Mau, T. Gentz, J.-H. Körber, M. E. Torres, M. Römer, H. Sahling, P. Wintersteller, R. Martinez, M. Schlüter, and E. Helmke
Biogeosciences, 12, 5261–5276, https://doi.org/10.5194/bg-12-5261-2015, https://doi.org/10.5194/bg-12-5261-2015, 2015
C. M. Chiessi, S. Mulitza, G. Mollenhauer, J. B. Silva, J. Groeneveld, and M. Prange
Clim. Past, 11, 915–929, https://doi.org/10.5194/cp-11-915-2015, https://doi.org/10.5194/cp-11-915-2015, 2015
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Here we show that temperatures in the western South Atlantic increased markedly during the major slowdown event of the Atlantic meridional overturning circulation (AMOC) of the last deglaciation. Over the adjacent continent, however, temperatures followed the rise in atmospheric carbon dioxide, lagging changes in oceanic temperature. Our records corroborate the notion that the long duration of the major slowdown event of the AMOC was fundamental in driving the Earth out of the last glacial.
M. Winterfeld, T. Laepple, and G. Mollenhauer
Biogeosciences, 12, 3769–3788, https://doi.org/10.5194/bg-12-3769-2015, https://doi.org/10.5194/bg-12-3769-2015, 2015
M. Winterfeld, M. A. Goñi, J. Just, J. Hefter, and G. Mollenhauer
Biogeosciences, 12, 2261–2283, https://doi.org/10.5194/bg-12-2261-2015, https://doi.org/10.5194/bg-12-2261-2015, 2015
Related subject area
Subject: Carbon Cycle | Archive: Marine Archives | Timescale: Pleistocene
Environmental controls of rapid terrestrial organic matter mobilization to the western Laptev Sea since the last deglaciation
No detectable influence of the carbonate ion effect on changes in stable carbon isotope ratios (δ13C) of shallow dwelling planktic foraminifera over the past 160 kyr
Atmospheric CO2 estimates for the Miocene to Pleistocene based on foraminiferal δ11B at Ocean Drilling Program Sites 806 and 807 in the Western Equatorial Pacific
Nutrient utilization and diatom productivity changes in the low-latitude south-eastern Atlantic over the past 70 ka: response to Southern Ocean leakage
Coccolithophore productivity at the western Iberian Margin during the Middle Pleistocene (310–455 ka) – evidence from coccolith Sr∕Ca data
Carbon burial in deep-sea sediment and implications for oceanic inventories of carbon and alkalinity over the last glacial cycle
Tsai-Wen Lin, Tommaso Tesi, Jens Hefter, Hendrik Grotheer, Jutta Wollenburg, Florian Adolphi, Henning Bauch, Alessio Nogarotto, Juliane Müller, and Gesine Mollenhauer
Clim. Past Discuss., https://doi.org/10.5194/cp-2024-60, https://doi.org/10.5194/cp-2024-60, 2024
Revised manuscript accepted for CP
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In order to understand the mechanisms governing permafrost organic matter re-mobilization, we investigated organic matter composition during past intervals of rapid sea-level rise, of inland warming, and of dense sea-ice cover in the Laptev Sea. We find that sea-level rise resulted in wide-spread erosion and transport of permafrost materials to the ocean, but erosion is mitigated by regional dense sea ice cover. Factors like inland warming or floods increase permafrost mobilization locally.
Peter Köhler and Stefan Mulitza
Clim. Past, 20, 991–1015, https://doi.org/10.5194/cp-20-991-2024, https://doi.org/10.5194/cp-20-991-2024, 2024
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We constructed 160 kyr long mono-specific stacks of δ13C and of δ18O from the wider tropics from the planktic foraminifera G. ruber and/or T. sacculifer and compared them with carbon cycle simulations using the BICYCLE-SE model. In our stacks and our model-based interpretation, we cannot detect a species-specific isotopic fractionation during hard-shell formation as a function of carbonate chemistry in the surrounding seawater, something which is called a carbonate ion effect.
Maxence Guillermic, Sambuddha Misra, Robert Eagle, and Aradhna Tripati
Clim. Past, 18, 183–207, https://doi.org/10.5194/cp-18-183-2022, https://doi.org/10.5194/cp-18-183-2022, 2022
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Here we reconstruct atmospheric CO2 values across major climate transitions over the past 16 million years (Myr) from two sites in the West Pacific Warm Pool using a pH proxy on surface-dwelling foraminifera. We are able to reproduce pCO2 data from ice cores; therefore we apply the same framework to older samples to create a long-term pH and pCO2 reconstruction. We give quantitative constraints on pH and pCO2 changes over the main climate transitions of the last 16 Myr.
Katharine Hendry, Oscar Romero, and Vanessa Pashley
Clim. Past, 17, 603–614, https://doi.org/10.5194/cp-17-603-2021, https://doi.org/10.5194/cp-17-603-2021, 2021
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Productive eastern boundary upwelling systems (EBUs) are characterized by abundant siliceous algae and diatoms, and they play a key role in carbon fixation. Understanding past shifts in diatom production is critical for predicting the impact of future climate change. We combine existing sediment archives from the Benguela EBU with new diatom isotope analyses and modelling to reconstruct late Quaternary silica cycling, which we suggest depends on both upwelling intensity and surface utilization.
Catarina Cavaleiro, Antje H. L. Voelker, Heather Stoll, Karl-Heinz Baumann, and Michal Kucera
Clim. Past, 16, 2017–2037, https://doi.org/10.5194/cp-16-2017-2020, https://doi.org/10.5194/cp-16-2017-2020, 2020
Olivier Cartapanis, Eric D. Galbraith, Daniele Bianchi, and Samuel L. Jaccard
Clim. Past, 14, 1819–1850, https://doi.org/10.5194/cp-14-1819-2018, https://doi.org/10.5194/cp-14-1819-2018, 2018
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A data-based reconstruction of carbon-bearing deep-sea sediment shows significant changes in the global burial rate over the last glacial cycle. We calculate the impact of these deep-sea changes, as well as hypothetical changes in continental shelf burial and volcanic outgassing. Our results imply that these geological fluxes had a significant impact on ocean chemistry and the global carbon isotopic ratio, and that the natural carbon cycle was not in steady state during the Holocene.
Cited articles
Andersen, K. K., Azuma, N., Barnola, J. M., Bigler, M., Biscaye, P., Caillon, N., Chappellaz, J., Clausen, H. B., Dahl-Jensen, D., Fischer, H., Flückiger, J., Fritzsche, D., Fujii, Y., Goto-Azuma, K., Grønvold, K., Gundestrup, N. S., Hansson, M., Huber, C., Hvidberg, C. S., Johnsen, S. J., Jonsell, U., Jouzel, J., Kipfstuhl, S., Landais, A., Leuenberger, M., Lorrain, R., Masson-Delmotte, V., Miller, H., Motoyama, H., Narita, H., Popp, T., Rasmussen, S. O., Raynaud, D., Rothlisberger, R., Ruth, U., Samyn, D., Schwander, J., Shoji, H., Siggard-Andersen, M. L., Steffensen, J. P., Stocker, T., Sveinbjörnsdóttir, A. E., Svensson, A., Takata, M., Tison, J. L., Thorsteinsson, T., Watanabe, O., Wilhelms, F., and White, J. W.: High-resolution record of Northern Hemisphere climate extending into the last interglacial period, Nature, 431, 147–151, 2004. a
Aufdenkampe, A. K., Mayorga, E., Raymond, P. A., Melack, J. M., Doney, S. C., Alin, S. R., Aalto, R. E., and Yoo, K.: Riverine coupling of biogeochemical cycles between land, oceans, and atmosphere, Front. Ecol. Environ., 9, 53–60, 2011. a
Avis, C. A., Weaver, A. J., and Meissner, K. J.: Reduction in areal extent of high-latitude wetlands in response to permafrost thaw, Nat. Geosci., 4, 444–448, 2011. a
Ballantyne, C. K. and Ó Cofaigh, C.: The Last Irish Ice Sheet: Extent and Chronology, in: Advances in Irish Quaternary Studies, Atlantis Press, Paris, 101–149, https://doi.org/10.3318/ijes.2018.36.4, 2017. a
Bateman, M. D. and Van Huissteden, J.: The timing of last-glacial periglacial and aeolian events, Twente, eastern Netherlands, J. Quaternary Sci., 14, 277–283, 1999. a
Bauer, J. E., Cai, W. J., Raymond, P. A., Bianchi, T. S., Hopkinson, C. S., and Regnier, P. A.: The changing carbon cycle of the coastal ocean, Nature, 504, 61–70, 2013. a
Bauska, T. K., Baggenstos, D., Brook, E. J., Mix, A. C., Marcott, S. A., Petrenko, V. V., Schaefer, H., Severinghaus, J. P., Lee, J. E., and Thiemens, M. H.: Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation, P. Natl. Acad. Sci. USA, 113, 3465–3470, 2016. a
Bogen, J. and Bønsnes, T. E.: Erosion and sediment transport in High Arctic rivers, Svalbard, Polar Res., 22, 175–189, 2003. a
Börner, A., Hrynowiecka, A., Stachowicz-Rybka, R., Niska, M., Moskal-del Hoyo, M., Kuznetsov, V., Maksimov, F., and Petrov, A.: Palaeoecological investigations and 230Th
Bröder, L., Tesi, T., Andersson, A., Semiletov, I., and Gustafsson, Ö.: Bounding cross-shelf transport time and degradation in Siberian-Arctic land-ocean carbon transfer, Nat. Commun., 9, 806, https://doi.org/10.1038/s41467-018-03192-1, 2018. a, b
Broecker, W. and Barker, S.: A 190 ‰ drop in atmosphere's Δ14C during the “Mystery Interval” (17.5 to 14.5 kyr), Earth Planet. Sc. Lett., 256, 90–99, 2007. a
Bronk Ramsey, C.: Deposition models for chronological records, Quaternary Sci. Rev., 27, 42–60, 2008. a
Bronk Ramsey, C.: Dealing with outliers and offsets in radiocarbon dating, Radiocarbon, 51, 1023–1045, 2009b. a
Bronk Ramsey, C. and Lee, S.: Recent and Planned Developments of the Program OxCal, Radiocarbon, 55, 720–730, 2013. a
Christiansen, H. H.: Periglacial sediments in an Eemian-Weichselian succession at Emmerlev Klev, southwestern Jutland, Denmark, Palaeogeogr. Palaeocl., 138, 245–258, 1998. a
Ciais, P., Tagliabue, A., Cuntz, M., Bopp, L., Scholze, M., Hoffmann, G., Lourantou, A., Harrison, S. P., Prentice, I. C., Kelley, D. I., Koven, C., and Piao, S. L.: Large inert carbon pool in the terrestrial biosphere during the Last Glacial Maximum, Nat. Geosci., 5, 74–79, 2012. a
Combourieu Nebout, N., Turon, J. L., Zahn, R., Capotondi, L., Londeix, L., and Pahnke, K.: Enhanced aridity and atmospheric high-pressure stability over the western Mediterranean during the North Atlantic cold events of the past 50 k.y, Geology, 30, 863–866, 2002. a
Copard, Y., Amiotte-Suchet, P., and Di-Giovanni, C.: Storage and release of fossil organic carbon related to weathering of sedimentary rocks, Earth Planet. Sc. Lett., 258, 345–357, 2007. a
Crivellari, S., Chiessi, C. M., Kuhnert, H., Häggi, C., da Costa Portilho-Ramos, R., Zeng, J. Y., Zhang, Y., Schefuß, E., Mollenhauer, G., Hefter, J., Alexandre, F., Sampaio, G., and Mulitza, S.: Increased Amazon freshwater discharge during late Heinrich Stadial 1, Quaternary Sci. Rev., 181, 144–155, 2018. a
De Moor, G.: Cryogenic Structures in the Weichselian Deposits of Northern Belgium and their Significance, Polarforschung, 53, 79–86, 1983. a
Dickson, A. J., Leng, M. J., Maslin, M. A., and Röhl, U.: Oceanic, atmospheric and ice-sheet forcing of South East Atlantic Ocean productivity and South African monsoon intensity during MIS-12 to 10, Quaternary Sci. Rev., 29, 3936–3947, https://doi.org/10.1016/j.quascirev.2010.09.014, 2010. a
Dypvik, H. and Harris, N. B.: Geochemical facies analysis of fine-grained siliciclastics using Th
Eglinton, T. I., Aluwihare, L. I., Bauer, J. E., Druffel, E. R., and McNichol, A. P.: Gas chromatographic isolation of individual compounds from complex matrices for radiocarbon dating, Anal. Chem., 68, 904–912, 1996. a
Ehlers, J., Grube, A., Stephan, H. J., and Wansa, S.: Pleistocene glaciations of North Germany-New results, Developments in Quaternary Science, 15, 149–162, 2011. a
Fairbanks, R. G.: A 17,000-year glacio-eustatic sea level record: influence of glacial melting rates on the Younger Dryas event and deep-ocean circulation, Nature, 342, 637–642, 1989. a
Farrington, J. W. and Tripp, B. W.: Hydrocarbons in western North Atlantic surface sediments, Geochim. Cosmochim. Ac., 41, 1627–1641, 1977. a
Feurdean, A., Grindean, R., Florescu, G., Tanţău, I., Niedermeyer, E. M., Diaconu, A.-C., Hutchinson, S. M., Nielsen, A. B., Sava, T., Panait, A., Braun, M., and Hickler, T.: The transformation of the forest steppe in the lower Danube Plain of southeastern Europe: 6000 years of vegetation and land use dynamics, Biogeosciences, 18, 1081–1103, https://doi.org/10.5194/bg-18-1081-2021, 2021. a
Fewster, R. E., Morris, P. J., Ivanovic, R. F., Swindles, G. T., Peregon, A. M., and Smith, C. J.: Imminent loss of climate space for permafrost peatlands in Europe and Western Siberia, Nat. Clim. Change, 12, 373–379, 2022. a
Fohlmeister, J., Voarintsoa, N. R. G., Lechleitner, F. A., Boyd, M., Brandtstätter, S., Jacobson, M. J., and Oster, J. L.: Main controls on the stable carbon isotope composition of speleothems, Geochim. Cosmochim. Ac., 279, 67–87, 2020. a
Freeman, C., Evans, C., and Monteih, D.: Export of organic carbon from peat soils, Nature, 412, 785, https://doi.org/10.1038/35090628, 2001. a
Garcin, Y., Schefuß, E., Dargie, G. C., Hawthorne, D., Ifo, S. A., Wenina, Y. E. M., and Mbemba, M.: Hydroclimatic vulnerability of peat carbon in the central Congo Basin, Nature, 612, 277–282, https://doi.org/10.1038/s41586-022-05389-3, 2022. a, b
Gibbard, P. L.: The history of the great northwest European rivers during the past three million years, Philos. T. R. Soc. B, 318, 559–602, 1988. a
Grotheer, H., Meyer, V., Riedel, T., Pfalz, G., Mathieu, L., Hefter, J., Gentz, T., Lantuit, H., Mollenhauer, G., and Fritz, M.: Burial and Origin of Permafrost-Derived Carbon in the Nearshore Zone of the Southern Canadian Beaufort Sea, Geophys. Res. Lett., 47, e2019GL085897, https://doi.org/10.1029/2019GL085897, 2020. a
Grube, A. and Usinger, H.: Spring fed raised peat hummocks with tufa deposits at the Farbeberg hills (Northwest-Germany): Structure, genesis and paleoclimatic conclusions (Eemian, Holocene), E and G Quaternary Science Journal, 66, 14–31, 2017. a
Gustafsson, Ö., van Dongen, B. E., Vonk, J. E., Dudarev, O. V., and Semiletov, I. P.: Widespread release of old carbon across the Siberian Arctic echoed by its large rivers, Biogeosciences, 8, 1737–1743, https://doi.org/10.5194/bg-8-1737-2011, 2011. a
He, D., Nemiah Ladd, S., Saunders, C. J., Mead, R. N., and Jaffé, R.: Distribution of n-alkanes and their δ2H and δ13C values in typical plants along a terrestrial-coastal-oceanic gradient, Geochim. Cosmochim. Ac., 281, 31–52, 2020. a
Heaton, T. J., Köhler, P., Butzin, M., Bard, E., Reimer, R. W., Austin, W. E., 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, 2020. a, b
Heaton, T. J., Bard, E., Bronk Ramsey, C., Butzin, M., Hatté, C., Hughen, K. A., Köhler, P., and Reimer, P. J.: a Response To Community Questions on the Marine20 Radiocarbon Age Calibration Curve: Marine Reservoir Ages and the Calibration of 14C Samples From the Oceans, Radiocarbon, 65, 247–273, 2023. a
Hefter, J.: Analysis of Alkenone Unsaturation Indices with Fast Gas Chromatography/Time-of-Flight Mass Spectrometry, Anal. Chem., 80, 2161–2170, 2008. a
Herfort, L., Schouten, S., Boon, J. P., Woltering, M., Baas, M., Weijers, J. W., and Sinninghe Damsté, J. S.: Characterization of transport and deposition of terrestrial organic matter in the southern North Sea using the BIT index, Limnol. Oceanogr., 51, 2196–2205, 2006. a
Hodgkins, S. B., Tfaily, M. M., McCalley, C. K., Logan, T. A., Crill, P. M., Saleska, S. R., Rich, V. I., and Chanton, J. P.: Changes in peat chemistry associated with permafrost thaw increase greenhouse gas production, P. Natl. Acad. Sci. USA, 111, 5819–5824, https://doi.org/10.1073/pnas.1314641111, 2014. a
Hopmans, E. C., Schouten, S., and Sinninghe Damsté, J. S.: The effect of improved chromatography on GDGT-based palaeoproxies, Org. Geochem., 93, 1–6, 2016. a
Hugelius, G., Strauss, J., Zubrzycki, S., Harden, J. W., Schuur, E. A. G., Ping, C.-L., Schirrmeister, L., Grosse, G., Michaelson, G. J., Koven, C. D., O'Donnell, J. A., Elberling, B., Mishra, U., Camill, P., Yu, Z., Palmtag, J., and Kuhry, P.: Estimated stocks of circumpolar permafrost carbon with quantified uncertainty ranges and identified data gaps, Biogeosciences, 11, 6573–6593, https://doi.org/10.5194/bg-11-6573-2014, 2014. a, b
Hugelius, G., Loisel, J., Chadburn, S., Jackson, R. B., Jones, M., MacDonald, G., Marushchak, M., Olefeldt, D., Packalen, M., Siewert, M. B., Treat, C., Turetsky, M., Voigt, C., and Yu, Z.: Large stocks of peatland carbon and nitrogen are vulnerable to permafrost thaw, P. Natl. Acad. Sci. USA, 117, 20438–20446, 2020. a
Inglis, G. N., Naafs, B. D. A., Zheng, Y., McClymont, E. L., Evershed, R. P., and Pancost, R. D.: Distributions of geohopanoids in peat: Implications for the use of hopanoid-based proxies in natural archives, Geochim. Cosmochim. Ac., 224, 249–261, https://doi.org/2017.12.029, 2018. a
Isarin, R. F.: Permafrost distribution and temperatures in Europe during the Younger Dryas, Permafrost Periglac., 8, 313–333, 1997. a
Itambi, A. C., Von Dobeneck, T., Mulitza, S., Bickert, T., and Heslop, D.: Millennial-scale northwest African droughts related to Heinrich events and Dansgaard-Oeschger cycles: Evidence in marine sediments from offshore Senegal, Paleoceanography, 24, 1–16, 2009. a
Jeng, W. L.: Higher plant n-alkane average chain length as an indicator of petrogenic hydrocarbon contamination in marine sediments, Mar. Chem., 102, 242–251, 2006. a
Jennerjahn, T. C., Ittekkot, V., Arz, H. W., Behling, H., Pätzold, J., and Wefer, G.: Asynchronous terrestrial and marine signals of climate change during Heinrich events, Science, 306, 2236–2239, 2004. a
Keskitalo, K., Tesi, T., Bröder, L., Andersson, A., Pearce, C., Sköld, M., Semiletov, I. P., Dudarev, O. V., and Gustafsson, Ö.: Sources and characteristics of terrestrial carbon in Holocene-scale sediments of the East Siberian Sea, Clim. Past, 13, 1213–1226, https://doi.org/10.5194/cp-13-1213-2017, 2017. a
Kim, J. H., Schouten, S., Bonnin, J., Buscail, R., Ludwig, W., Sinninghe Damsté, J. S., and Bourrin, F.: Origin and distribution of terrestrial organic matter in the NW Mediterranean (Gulf of Lions): Exploring the newly developed BIT index, Geochem. Geophy. Geosy., 7, Q11017, https://doi.org/10.1029/2006GC001306, 2006. a
Kirkham, J. D., Hogan, K. A., Larter, R. D., Arnold, N. S., Ely, J. C., Clark, C. D., Self, E., Games, K., Huuse, M., Stewart, M. A., Ottesen, D., and Dowdeswell, J. A.: Tunnel valley formation beneath deglaciating mid-latitude ice sheets : Observations and modelling, Quaternary Sci. Rev., 323, 107680, https://doi.org/10.1016/j.quascirev.2022.107680, 2022. a
Köhler, P., Knorr, G., and Bard, E.: Permafrost thawing as a possible source of abrupt carbon release at the onset of the Bølling/Allerød, Nat. Commun., 5, 5520, https://doi.org/10.1038/ncomms6520, 2014. a, b, c, d
Köhler, P., Nehrbass-Ahles, C., Schmitt, J., Stocker, T. F., and Fischer, H.: A 156 kyr smoothed history of the atmospheric greenhouse gases CO2, CH4, and N2O and their radiative forcing, Earth Syst. Sci. Data, 9, 363–387, https://doi.org/10.5194/essd-9-363-2017, 2017. a, b
Koppes, M. and Hallet, B.: Erosion rates during rapid deglaciation in Icy Bay, Alaska, J. Geophys. Res.-Earth, 111, F02023, https://doi.org/10.1029/2005JF000349, 2006. a
Koppes, M. N. and Hallet, B.: Influence of rapid glacial retreat on the rate of erosion by tidewater glaciers, Geology, 30, 47–50, 2002. a
Kusch, S., Rethemeyer, J., Schefuß, E., and Mollenhauer, G.: Controls on the age of vascular plant biomarkers in Black Sea sediments, Geochim. Cosmochim. Ac., 74, 7031–7047, 2010. a
Kusch, S., Mollenhauer, G., Willmes, C., Hefter, J., Eglinton, T. I., and Galy, V.: Controls on the age of plant waxes in marine sediments – A global synthesis, Org. Geochem., 157, 104259, https://doi.org/10.1016/j.orggeochem.2021.104259, 2021. a
Kvenvolden, K. A.: Molecular Distributions of Normal Fatty Acids and Paraffins in Some Lower Cretaceous Sediments, Nature, 209, 573–577, https://doi.org/10.1038/209573a0, 1966. a
Kylander, M. E., Ampel, L., Wohlfarth, B., and Veres, D.: High-resolution X-ray fluorescence core scanning analysis of Les Echets (France) sedimentary sequence: New insights from chemical proxies, J. Quaternary Sci., 26, 109–117, 2011. a
Tisnérat-Laborde, N., Paterne, M., Métivier, B., Arnold, M., Yiou, P., Blamart, D., and Raynaud, S.: Variability of the northeast Atlantic sea surface Δ14C and marine reservoir age and the North Atlantic Oscillation (NAO), Quaternary Sci. Rev., 29, 2633–2646, https://doi.org/10.1016/j.quascirev.2010.06.013, 2010. a
Lambeck, K., Rouby, H., Purcell, A., Sun, Y., and Sambridge, M.: Sea level and global ice volumes from the Last Glacial Maximum to the Holocene, P. Natl. Acad. Sci. USA, 111, 15296–15303, 2014. a
Lebreiro, S. M., Voelker, A. H., Vizcaino, A., Abrantes, F. G., Alt-Epping, U., Jung, S., Thouveny, N., and Gràcia, E.: Sediment instability on the Portuguese continental margin under abrupt glacial climate changes (last 60 kyr), Quaternary Sci. Rev., 28, 3211–3223, 2009. a
chleitner, F. A., Day, C. C., Kost, O., Wilhelm, M., Haghipour, N., Henderson, G. M., and Stoll, H. M.: Stalagmite carbon isotopes suggest deglacial increase in soil respiration in western Europe driven by temperature change, Clim. Past, 17, 1903–1918, https://doi.org/10.5194/cp-17-1903-2021, 2021. a
Levavasseur, G., Vrac, M., Roche, D. M., Paillard, D., Martin, A., and Vandenberghe, J.: Present and LGM permafrost from climate simulations: contribution of statistical downscaling, Clim. Past, 7, 1225–1246, https://doi.org/10.5194/cp-7-1225-2011, 2011. a, b
Lindgren, A., Hugelius, G., and Kuhry, P.: Extensive loss of past permafrost carbon but a net accumulation into present-day soils, Nature, 560, 219–222, 2018. a
Liu, X.-l., Lipp, J. S., Simpson, J. H., Lin, Y.-s., Summons, R. E., and Hinrichs, K.-U.: Mono- and dihydroxyl glycerol dibiphytanyl glycerol tetraethers in marine sediments : Identification of both core and intact polar lipid forms, Geochim. Cosmochim. Ac., 89, 102–115, 2012. a
Mangerud, J., Jakobsson, M., Alexanderson, H., Astakhov, V., Clarke, G. K., Henriksen, M., Hjort, C., Krinner, G., Lunkka, J. P., Möller, P., Murray, A., Nikolskaya, O., Saarnisto, M., and Svendsen, J. I.: Ice-dammed lakes and rerouting of the drainage of northern Eurasia during the Last Glaciation, Quaternary Sci. Rev., 23, 1313–1332, 2004. a, b
Marcott, S. A., Bauska, T. K., Buizert, C., Steig, E. J., Rosen, J. L., Cuffey, K. M., Fudge, T. J., Severinghaus, J. P., Ahn, J., Kalk, M. L., McConnell, J. R., Sowers, T., Taylor, K. C., White, J. W., and Brook, E. J.: Centennial-scale changes in the global carbon cycle during the last deglaciation, Nature, 514, 616–619, 2014. a
Marks, L.: Last Glacial Maximum in Poland, Quaternary Sci. Rev., 21, 103–110, 2002. a
Martens, J., Wild, B., Pearce, C., Tesi, T., Andersson, A., Bröder, L., O'Regan, M., Jakobsson, M., Sköld, M., Gemery, L., Cronin, T. M., Semiletov, I., Dudarev, O. V., and Gustafsson, Ö.: Remobilization of Old Permafrost Carbon to Chukchi Sea Sediments During the End of the Last Deglaciation, Global Biogeochem. Cy., 33, 2–14, 2019. a
Martens, J., Wild, B., Muschitiello, F., O'Regan, M., Jakobsson, M., Semiletov, I., Dudarev, O. V., and Gustafsson, Ö.: Remobilization of dormant carbon from Siberian-Arctic permafrost during three past warming events, Science Advances, 6, eabb6546, https://doi.org/10.1126/sciadv.abb6546, 2020. a
Meyers and Ishiwatari, R.: Lacustrine organic geochemistry-an overview of indicators of organic matter sources and diagenesis in lake sediments, Org. Geochem., 20, 867–900, 1993. a
Meyer, V. D., Hefter, J., Köhler, P., Tiedemann, R., Gersonde, R., Wacker, L., and Mollenhauer, G.: Permafrost-carbon mobilization in Beringia caused by deglacial meltwater runoff, sea-level rise and warming, Environ. Res. Lett., 14, 085003, https://doi.org/10.1088/1748-9326/ab2653, 2019. a, b, c, d, e, f, g
Mitra, S., Wassmann, R., and Vlek, P. L. G.: Global inventory of wetlands and their role in the carbon cycle, ZEF Discusson Paper on Development Policy, Bonn, p. 57, https://doi.org/10.22004/ag.econ.18771, 2003. a
Mollenhauer, G., Grotheer, H., Gentz, T., Bonk, E., and Hefter, J.: Standard operation procedures and performance of the MICADAS radiocarbon laboratory at Alfred Wegener Institute (AWI), Germany, Nucl. Instrum. Meth. B, 496, 45–51, https://doi.org/10.1016/j.nimb.2021.03.016, 2021. a
Moore, S., Evans, C. D., Page, S. E., Garnett, M. H., Jones, T. G., Freeman, C., Hooijer, A., Wiltshire, A. J., Limin, S. H., and Gauci, V.: Deep instability of deforested tropical peatlands revealed by fluvial organic carbon fluxes, Nature, 493, 660–663, https://doi.org/10.1038/nature11818, 2013. a
Müller, J. and Joos, F.: Global peatland area and carbon dynamics from the Last Glacial Maximum to the present – a process-based model investigation, Biogeosciences, 17, 5285–5308, https://doi.org/10.5194/bg-17-5285-2020, 2020. a, b
Nichols, J. E., Booth, R. K., Jackson, S. T., Pendall, E. G., and Huang, Y.: Paleohydrologic reconstruction based on n-alkane distributions in ombrotrophic peat, Org. Geochem., 37, 1505–1513, 2006. a
Nieuwenhuize, J., Maas, Y., and Middelburg, J.: Rapid analysis of organic carbon and nitrogen in particulate materials, Mar. Chem., 45, 217–224, 1994. a
Ó Cofaigh, C. and Evans, D. J.: Radiocarbon constraints on the age of the maximum advance of the British-Irish Ice Sheet in the Celtic Sea, Quaternary Sci. Rev., 26, 1197–1203, 2007. a
Pailler, D. and Bard, E.: High frequency palaeoceanographic changes during the past 140 000 yr recorded by the organic matter in sediments of the Iberian Margin, Palaeogeogr. Palaeocl., 181, 431–452, 2002. a
Perez, L., García-Rodríguez, F., and Hanebuth, T. J. J.: Variability in terrigenous sediment supply offshore of the Río de la Plata (Uruguay) recording the continental climatic history over the past 1200 years, Clim. Past, 12, 623–634, https://doi.org/10.5194/cp-12-623-2016, 2016. a
Petera-Zganiacz, J. and Dzieduszyńska, D. A.: Palaeoenvironmental Proxies for Permafrost Presence During the Younger Dryas, Central Poland, Permafrost Periglac., 28, 726–740, 2017. a
Piotrowski, J. A.: Tunnel-valley formation in northwest Germany-geology, mechanisms of formation and subglacial bed conditions for the Bornhöved tunnel valley, Sediment. Geol., 89, 107–141, 1994. a
Piotrowski, J. A.: Subglacial groundwater flow during the last deglaciation in northwestern Germany, Sediment. Geol., 111, 217–224, 1997. a
Piotrowski, J. A., Geletneky, J., and Vater, R.: Soft-bedded subglacial meltwater channel from the Welzow-Sud open-cast lignite mine, Lower Lusatia, eastern Germany, Boreas, 28, 363–374, 1999. a
Queiroz Alves, E., Wong, W., Hefter, J., Grotheer, H., Tesi, T., Gentz, T., Zonneveld, K. A. F., and Mollenhauer, G.: Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay, PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.954937 2023. a
Raymond, P. A., Bauer, J. E., Caraco, N. F., Cole, J. J., Longworth, B., and Petsch, S. T.: Controls on the variability of organic matter and dissolved inorganic carbon ages in northeast US rivers, Mar. Chem., 92, 353–366, 2004. a
Reimer, P. J., Austin, W. E., Bard, E., Bayliss, A., Blackwell, P. G., Bronk Ramsey, C., Butzin, M., Cheng, H., Edwards, R. L., Friedrich, M., Grootes, P. M., Guilderson, T. P., Hajdas, I., Heaton, T. J., Hogg, A. G., Hughen, K. A., Kromer, B., Manning, S. W., Muscheler, R., Palmer, J. G., Pearson, C., Van Der Plicht, J., Reimer, R. W., Richards, D. A., Scott, E. M., Southon, J. R., Turney, C. S., Wacker, L., Adolphi, F., Büntgen, U., Capano, M., Fahrni, S. M., Fogtmann-Schulz, A., Friedrich, R., Köhler, P., Kudsk, S., Miyake, F., Olsen, J., Reinig, F., Sakamoto, M., Sookdeo, A., and Talamo, S.: The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP), Radiocarbon, 62, 725–757, 2020. a
Rommerskirchen, F., Eglinton, G., Dupont, L., and Rullkötter, J.: Glacial/interglacial changes in southern Africa: Compoundspecific δ13C land plant biomarker and pollen records from southeast Atlantic continental margin sediments, Geochem. Geophy. Geosy., 7, 8, Q08010, https://doi.org/10.1029/2005GC001223, 2006. a
Rostek, F. and Bard, E.: Hydrological changes in eastern Europe during the last 40,000yr inferred from biomarkers in Black Sea sediments, Quaternary Res., 80, 502–509, https://doi.org/10.1016/j.yqres.2013.07.003, 2013. a, b
Schaefer, K., Lantuit, H., Romanovsky, V. E., Schuur, E. A., and Witt, R.: The impact of the permafrost carbon feedback on global climate, Environ. Res. Lett., 9, 085003, https://doi.org/10.1088/1748-9326/9/8/085003, 2014. a, b
Schneider von Deimling, T., Grosse, G., Strauss, J., Schirrmeister, L., Morgenstern, A., Schaphoff, S., Meinshausen, M., and Boike, J.: Observation-based modelling of permafrost carbon fluxes with accounting for deep carbon deposits and thermokarst activity, Biogeosciences, 12, 3469–3488, https://doi.org/10.5194/bg-12-3469-2015, 2015. a, b
Schokker, J., Cleveringa, P., and Murray, A. S.: Palaeoenvironmental reconstruction and OSL dating of terrestrial Eemian deposits in the southeastern Netherlands, J. Quaternary Sci., 19, 193–202, 2004. a
Schouten, S., Hopmans, E. C., and Sinninghe Damsté, J. S.: The organic geochemistry of glycerol dialkyl glycerol tetraether lipids: A review, Org. Geochem., 54, 19–61, https://doi.org/10.1016/j.orggeochem.2012.09.006, 2013. a
Schuur, E. A., Bockheim, J., Canadell, J. G., Euskirchen, E., Field, C. B., Goryachkin, S. V., Hagemann, S., Kuhry, P., Lafleur, P. M., Lee, H., Mazhitova, G., Nelson, F. E., Rinke, A., Romanovsky, V. E., Shiklomanov, N., Tarnocai, C., Venevsky, S., Vogel, J. G., and Zimov, S. A.: Vulnerability of permafrost carbon to climate change: Implications for the global carbon cycle, BioScience, 58, 701–714, 2008. a
Schuur, E. A., Vogel, J. G., Crummer, K. G., Lee, H., Sickman, J. O., and Osterkamp, T. E.: The effect of permafrost thaw on old carbon release and net carbon exchange from tundra, Nature, 459, 556–559, https://doi.org/10.1038/nature08031, 2009. a
Schuur, E. A., McGuire, A. D., Schädel, C., Grosse, G., Harden, J. W., Hayes, D. J., Hugelius, G., Koven, C. D., Kuhry, P., Lawrence, D. M., Natali, S. M., Olefeldt, D., Romanovsky, V. E., Schaefer, K., Turetsky, M. R., Treat, C. C., and Vonk, J. E.: Climate change and the permafrost carbon feedback, Nature, 520, 171–179, 2015. a, b
Sidorchuk, A. Y., Panin, A. V., and Borisova, O. K.: Morphology of river channels and surface runoff in the Volga River basin (East European Plain) during the Late Glacial period, Geomorphology, 113, 137–157, 2009. a
Sidorchuk, A. Y., Panin, A. V., and Borisova, O. K.: Surface runoff to the Black Sea from the East European plain during Last Glacial Maximum-Late Glacial time, Special Paper of the Geological Society of America, 473, 1–25, 2011. a
Simmons, C. T., Matthews, H. D., and Mysak, L. A.: Deglacial climate, carbon cycle and ocean chemistry changes in response to a terrestrial carbon release, Clim. Dynam., 46, 1287–1299, 2016. a
Sinninghe Damsté, J. S., Hopmans, E. C., Pancost, R. D., Schouten, S., and Geenevasen, J. A.: Newly discovered non-isoprenoid glycerol dialkyl glycerol tetraether lipids in sediments, Chem. Commun., 17, 1683–1684, 2000. a
Stuiver, M. and Polach, H.: Reporting of 14C data, Radiocarbon, 19, 355–363, 1977. a
Sun, S., Meyer, V. D., Dolman, A. M., Winterfeld, M., Hefter, J., Dummann, W., McIntyre, C., Montluçon, D. B., Haghipour, N., Wacker, L., Gentz, T., Van Der Voort, T. S., Eglinton, T. I., and Mollenhauer, G.: 14C Blank Assessment in Small-Scale Compound-Specific Radiocarbon Analysis of Lipid Biomarkers and Lignin Phenols, Radiocarbon, 62, 207–218, 2020. a
Svendsen, J. I., Alexanderson, H., Astakhov, V. I., Demidov, I., Dowdeswell, J. A., Funder, S., Gataullin, V., Henriksen, M., Hjort, C., Houmark-Nielsen, M., Hubberten, H. W., Ingólfsson, Ó., Jakobsson, M., Kjær, K. H., Larsen, E., Lokrantz, H., Lunkka, J. P., Lyså, A., Mangerud, J., Matiouchkov, A., Murray, A., Möller, P., Niessen, F., Nikolskaya, O., Polyak, L., Saarnisto, M., Siegert, C., Siegert, M. J., Spielhagen, R. F., and Stein, R.: Late Quaternary ice sheet history of northern Eurasia, Quaternary Sci. Rev., 23, 1229–1271, 2004. a
Tesi, T., Muschitiello, F., Smittenberg, R. H., Jakobsson, M., Vonk, J. E., Hill, P., Andersson, A., Kirchner, N., Noormets, R., Dudarev, O., Semiletov, I., and Gustafsson: Massive remobilization of permafrost carbon during post-glacial warming, Nat. Commun., 7, 1–10, 2016. a
Toucanne, S., Zaragosi, S., Bourillet, J. F., Cremer, M., Eynaud, F., Van Vliet-Lanoë, B., Penaud, A., Fontanier, C., Turon, J. L., Cortijo, E., and Gibbard, P. L.: Timing of massive “Fleuve Manche” discharges over the last 350 kyr: insights into the European ice-sheet oscillations and the European drainage network from MIS 10 to 2, Quaternary Sci. Rev., 28, 1238–1256, https://doi.org/10.1016/j.quascirev.2009.01.006, 2009. a, b
Toucanne, S., Zaragosi, S., Bourillet, J. F., Marieu, V., Cremer, M., Kageyama, M., Van Vliet-Lanoë, B., Eynaud, F., Turon, J. L., and Gibbard, P. L.: The first estimation of Fleuve Manche palaeoriver discharge during the last deglaciation: Evidence for Fennoscandian ice sheet meltwater flow in the English Channel ca 20–18 ka ago, Earth Planet. Sc. Lett., 290, 459–473, https://doi.org/10.1016/j.epsl.2009.12.050, 2010. a, b, c
Toucanne, S., Soulet, G., Freslon, N., Silva Jacinto, R., Dennielou, B., Zaragosi, S., Eynaud, F., Bourillet, J. F., and Bayon, G.: Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate, Quaternary Sci. Rev., 123, 113–133, 2015. a, b, c, d
Treat, C. C., Kleinen, T., Broothaerts, N., Dalton, A. S., Dommaine, R., Douglas, T. A., Drexler, J. Z., Finkelstein, S. A., Grosse, G., Hope, G., Hutchings, J., Jones, M. C., Kuhry, P., Lacourse, T., Lähteenoja, O., Loisel, J., Notebaert, B., Payne, R. J., Peteet, D. M., Sannel, A. B. K., Stelling, J. M., Strauss, J., Swindles, G. T., Talbot, J., Tarnocai, C., Verstraeten, G., Williams, C. J., Xia, Z., Yu, Z., Väliranta, M., Hättestrand, M., Alexanderson, H., and Brovkin, V.: Widespread global peatland establishment and persistence over the last 130,000 y, P. Natl. Acad. Sci. USA, 116, 4822–4827, 2019. a, b
Turner, C.: The Eemian interglacial in the North European plain and adjacent areas, Geol. Mijnbouw-N. J. G., 79, 217–231, 2000. a
Van Huissteden, J., Vandenberghe, J., Van Der Hammen, T., and Laan, W.: Fluvial and aeolian interaction under permafrost conditions: Weichselian Late Pleniglacial, Twente, eastern Netherlands, Catena, 40, 307–321, 2000. a
Vonk, J. E., Sanchez-Garca, L., Van Dongen, B. E., Alling, V., Kosmach, D., Charkin, A., Semiletov, I. P., Dudarev, O. V., Shakhova, N., Roos, P., Eglinton, T. I., Andersson, A., and Gustafsson, A.: Activation of old carbon by erosion of coastal and subsea permafrost in Arctic Siberia, Nature, 489, 137–140, 2012. a
Wacker, L., Christl, M., and Synal, H. A.: Bats: A new tool for AMS data reduction, Nuclear Instrum. Meth. B, 268, 976–979, 2010. a
Wainer, K., Genty, D., Blamart, D., Daëron, M., Bar-Matthews, M., Vonhof, H., Dublyansky, Y., Pons-Branchu, E., Thomas, L., van Calsteren, P., Quinif, Y., and Caillon, N.: Speleothem record of the last 180 ka in Villars cave (SW France): Investigation of a large δ18O shift between MIS6 and MIS5, Quaternary Sci. Rev., 30, 130–146, 2011. a, b
Weltje, G. J. and Tjallingii, R.: Calibration of XRF core scanners for quantitative geochemical logging of sediment cores: Theory and application, Earth Planet. Sc. Lett., 274, 423–438, 2008. a
Winterfeld, M., Mollenhauer, G., Dummann, W., Köhler, P., Lembke-Jene, L., Meyer, V. D., Hefter, J., McIntyre, C., Wacker, L., Kokfelt, U., and Tiedemann, R.: Deglacial mobilization of pre-aged terrestrial carbon from degrading permafrost, Nat. Commun., 9, 3666, https://doi.org/10.1038/s41467-018-06080-w, 2018. a, b, c, d, e
Woronko, B., Rychel, J., Karasiewicz, T. M., Kupryjanowicz, M., Adamczyk, A., Fiłoc, M., Marks, L., Krzywicki, T., and Pochocka-Szwarc, K.: Post-Saalian transformation of dry valleys in eastern Europe: An example from NE Poland, Quatern. Int., 467, 161–177, 2018. a
Wu, L., Wilson, D. J., Wang, R., Yin, X., Chen, Z., Xiao, W., and Huang, M.: Evaluating Zr
Žák, K., Richter, D. K., Filippi, M., Živor, R., Deininger, M., Mangini, A., and Scholz, D.: Coarsely crystalline cryogenic cave carbonate – a new archive to estimate the Last Glacial minimum permafrost depth in Central Europe, Clim. Past, 8, 1821–1837, https://doi.org/10.5194/cp-8-1821-2012, 2012. a
Zhang, Y., Chiessi, C. M., Mulitza, S., Zabel, M., Trindade, R. I., Hollanda, M. H. B., Dantas, E. L., Govin, A., Tiedemann, R., and Wefer, G.: Origin of increased terrigenous supply to the NE South American continental margin during Heinrich Stadial 1 and the Younger Dryas, Earth Planet. Sc. Lett., 432, 493–500, 2015. a
Zhao, Z., Ahlberg, P., Thibault, N., Dahl, T. W., Schovsbo, N. H., and Nielsen, A. T.: High-resolution carbon isotope chemostratigraphy of the middle Cambrian to lowermost Ordovician in southern Scandinavia: Implications for global correlation, Global Planet. Change, 209, 103751, https://doi.org/10.1016/j.gloplacha.2022.103751, 2022. a, b
Zhou, B., Zheng, H., Yang, W., Taylor, D., Lu, Y., Wei, G., Li, L., and Wang, H.: Climate and vegetation variations since the LGM recorded by biomarkers from a sediment core in the northern South China Sea, J. Quaternary Sci., 27, 948–955, 2012. a
Zimov, S. A., Davydov, S. P., Zimova, G. M., Davydova, A. I., Schuur, E. A., Dutta, K., and Chapin, I. S.: Permafrost carbon: Stock and decomposability of a globally significant carbon pool, Geophys. Res. Lett., 33, L20502, https://doi.org/10.1029/2006GL027484, 2006. a
Short summary
Our study reveals a previously unknown peat source for the massive influx of terrestrial organic matter that was exported from the European continent to the ocean during the last deglaciation. Our findings shed light on ancient terrestrial organic carbon mobilization, providing insights that are crucial for refining climate models.
Our study reveals a previously unknown peat source for the massive influx of terrestrial organic...
