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1. Atlantic circulation changes across a stadial-interstadial transition

Author

Research Council of Norway, Agencia Estatal de Investigación (España), Waelbroeck, Claire [0000-0002-7256-5727], Tjiputra, Jerry [0000-0002-4600-2453], Guo, Chuncheng [0000-0001-6276-6499], Nisancioglu, Kerim H. [0000-0002-5737-5765], Eynaud, Frédérique [0000-0003-1283-7425], Martín Lebreiro, Susana [0000-0003-1478-2448], Nave, Silvia [0000-0003-0845-1044], Waelbroeck, Claire, Tjiputra, Jerry, Guo, Chuncheng, Nisancioglu, Kerim H., Jansen, Eystein, Vázquez Riveiros, Natalia, Toucanne, Samuel, Eynaud, Frédérique, Rossignol, L., Dewilde, Fabien, Marchès, Elodie, Martín Lebreiro, Susana, Nave, Silvia, Research Council of Norway, Agencia Estatal de Investigación (España), Waelbroeck, Claire [0000-0002-7256-5727], Tjiputra, Jerry [0000-0002-4600-2453], Guo, Chuncheng [0000-0001-6276-6499], Nisancioglu, Kerim H. [0000-0002-5737-5765], Eynaud, Frédérique [0000-0003-1283-7425], Martín Lebreiro, Susana [0000-0003-1478-2448], Nave, Silvia [0000-0003-0845-1044], Waelbroeck, Claire, Tjiputra, Jerry, Guo, Chuncheng, Nisancioglu, Kerim H., Jansen, Eystein, Vázquez Riveiros, Natalia, Toucanne, Samuel, Eynaud, Frédérique, Rossignol, L., Dewilde, Fabien, Marchès, Elodie, Martín Lebreiro, Susana, and Nave, Silvia

Abstract

[EN] We combine consistently dated benthic carbon isotopic records distributed over the entire Atlantic Ocean with numerical simulations performed by a glacial configuration of the Norwegian Earth System Model with active ocean biogeochemistry in order to interpret the observed Cibicides 13C changes at the stadial-interstadial transition corresponding to the end of Heinrich Stadial 4 (HS4) in terms of ocean circulation and remineralization changes. We show that the marked increase in Cibicides 13C observed at the end of HS4 between g1/42000 and 4200gm in the Atlantic can be explained by changes in nutrient concentrations as simulated by the model in response to the halting of freshwater input in the high-latitude glacial North Atlantic. Our model results show that this Cibicides 13C signal is associated with changes in the ratio of southern-sourced (SSW) versus northern-sourced (NSW) water masses at the core sites, whereby SSW is replaced by NSW as a consequence of the resumption of deep-water formation in the northern North Atlantic and Nordic Seas after the freshwater input is halted. Our results further suggest that the contribution of ocean circulation changes to this signal increases from g1/440g% at 2000gm to g1/480g% at 4000gm. Below g1/44200gm, the model shows little ocean circulation change but an increase in remineralization across the transition marking the end of HS4. The simulated lower remineralization during stadials compared to during interstadials is particularly pronounced in deep subantarctic sites, in agreement with the decrease in the export production of carbon to the deep Southern Ocean during stadials found in previous studies.

Published
2023

3. Atlantic circulation changes across a stadial–interstadial transition

Author

Waelbroeck, Claire, primary, Tjiputra, Jerry, additional, Guo, Chuncheng, additional, Nisancioglu, Kerim H., additional, Jansen, Eystein, additional, Vázquez Riveiros, Natalia, additional, Toucanne, Samuel, additional, Eynaud, Frédérique, additional, Rossignol, Linda, additional, Dewilde, Fabien, additional, Marchès, Elodie, additional, Lebreiro, Susana, additional, and Nave, Silvia, additional

Published
2023
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4. LUÍS REBÊLO : missão e dedicação ao litoral e aos sistemas dunares

Author

Nave, Silvia and Monteiro, José Hipólito

Subjects
Ambiente costeiro, Biografias, Luís Rebêlo, Homenagem, Dunas, Geologia marinha
Abstract

RESUMO: Luís Rebêlo foi o principal impulsionador, nas últimas duas décadas, da área de geologia costeira da Instituição onde trabalhou durante 33 anos nos Serviços Geológicos Portugueses. O seu abrupto falecimento veio provocar uma enorme perda e um dano de difícil reparação, dada a falta que faz um especialista consagrado em geologia costeira à Unidade de Geologia, Hidrogeologia e Geologia Costeira. Licenciou-se em Geologia pela Faculdade de Ciências da Universidade Clássica de Lisboa. O início da sua carreira profissional deu-se como Hidrogeólogo da PGIRH/T – Projecto Tejo, num breve período entre 1988 e 1989, data em que ingressou, como geólogo, e sob orientação de Hipólito Monteiro, no Departamento de Geologia Aplicada dos Serviços Geológicos de Portugal (SGP), da então Direcção-Geral de Minas e Serviços Geológicos. Em 1993, com a criação do novo Departamento de Geologia Marinha, transitou para esta unidade onde iniciou o seu percurso de investigação no domínio da Geologia Costeira. info:eu-repo/semantics/publishedVersion

Published
2023

5. Consistently dated Atlantic sediment cores over the last 40 thousand years

Author

Waelbroeck, Claire, Lougheed, Bryan C., Vazquez Riveiros, Natalia, Missiaen, Lise, Pedro, Joel, Dokken, Trond, Hajdas, Irka, Wacker, Lukas, Abbott, Peter, Dumoulin, Jean-Pascal, Thil, François, Eynaud, Frédérique, Rossignol, Linda, Fersi, Wiem, Albuquerque, Ana Luiza, Arz, Helge, Austin, William E. N., Came, Rosemarie, Carlson, Anders E., Collins, James A., Dennielou, Bernard, Desprat, Stéphanie, Dickson, Alex, Elliot, Mary, Farmer, Christa, Giraudeau, Jacques, Gottschalk, Julia, Henderiks, Jorijntje, Hughen, Konrad, Jung, Simon, Knutz, Paul, Lebreiro, Susana, Lund, David C., Lynch-Stieglitz, Jean, Malaizé, Bruno, Marchitto, Thomas, Martínez-Méndez, Gema, Mollenhauer, Gesine, Naughton, Filipa, Nave, Silvia, Nürnberg, Dirk, Oppo, Delia, Peck, Victoria, Peeters, Frank J. C., Penaud, Aurélie, Portilho-Ramos, Rodrigo da Costa, Repschläger, Janne, Roberts, Jenny, Rühlemann, Carsten, Salgueiro, Emilia, Sanchez Goni, Maria Fernanda, Schönfeld, Joachim, Scussolini, Paolo, Skinner, Luke C., Skonieczny, Charlotte, Thornalley, David, Toucanne, Samuel, Rooij, David Van, Vidal, Laurence, Voelker, Antje H. L., Wary, Mélanie, Weldeab, Syee, and Ziegler, Martin

Published
2019
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6. Supplementary material to "Atlantic circulation changes across a stadial-interstadial transition"

Author

Waelbroeck, Claire, primary, Tjiputra, Jerry, additional, Guo, Chuncheng, additional, Nisancioglu, Kerim H., additional, Jansen, Eystein, additional, Vazquez Riveiros, Natalia, additional, Toucanne, Samuel, additional, Eynaud, Frédérique, additional, Rossignol, Linda, additional, Dewilde, Fabien, additional, Marchès, Elodie, additional, Lebreiro, Susana, additional, and Nave, Silvia, additional

Published
2022
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7. Atlantic circulation changes across a stadial-interstadial transition

Author

Waelbroeck, Claire, primary, Tjiputra, Jerry, additional, Guo, Chuncheng, additional, Nisancioglu, Kerim H., additional, Jansen, Eystein, additional, Vazquez Riveiros, Natalia, additional, Toucanne, Samuel, additional, Eynaud, Frédérique, additional, Rossignol, Linda, additional, Dewilde, Fabien, additional, Marchès, Elodie, additional, Lebreiro, Susana, additional, and Nave, Silvia, additional

Published
2022
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10. Atlantic circulation changes across a stadial-interstadial transition.

Author

Waelbroeck, Claire, Tjiputra, Jerry, Chuncheng Guo, Nisancioglu, Kerim H., Jansen, Eystein, Riveiros, Natalia Vazquez, Toucanne, Samuel, Eynaud, Frédérique, Rossignol, Linda, Dewilde, Fabien, Marchès, Elodie, Lebreiro, Susana, and Nave, Silvia

Abstract

We combine consistently dated benthic carbon isotopic records distributed over the entire Atlantic Ocean with numerical simulations performed by a glacial configuration of the Norwegian Earth System Model with active ocean biogeochemistry, in order to interpret the observed Cibicides δ13C changes at the stadial-interstadial transition corresponding to the end of Heinrich Stadial 4 (HS4) in terms of ocean circulation and remineralization changes. We show that the marked increase in Cibicides δ13C observed at the end of HS4 between ~2000 and 4200 m in the Atlantic can be explained by changes in nutrient concentrations as simulated by the model in response to the halting of freshwater input in the high latitude glacial North Atlantic. Our model results show that this Cibicides δ13C signal is associated with changes in the ratio of southern-sourced (SSW) versus northern-sourced (NSW) water masses at the core sites, whereby SSW is replaced by NSW as a consequence of the resumption of deep water formation in the northern North Atlantic and Nordic Seas after the freshwater input is halted. Our results further suggest that the contribution of ocean circulation changes to this signal increases from ~40 % at 2000 m to ~80 % at 4000 m. Below ~4200 m, the model shows little ocean circulation change but an increase in remineralization across the transition marking the end of HS4. The simulated lower remineralization during stadials than interstadials is particularly pronounced in deep subantarctic sites, in agreement with the decrease in the export production of carbon to the deep Southern Ocean during stadials found in previous studies. [ABSTRACT FROM AUTHOR]

Published
2022
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12. Drilling the Tore seamount- Archive of a natural oceanic sediment trap

Author

Lebreiro, Susana M., primary, Nave, Silvia, additional, Antón, Laura, additional, Michel, Elizabeth, additional, Kissel, Catherine, additional, Waelbroeck, Claire, additional, McCave, Nick, additional, Hodell, David, additional, Flores, Jose-Abel, additional, Martinez-Ruiz, Francisca, additional, Martrat, Belén, additional, Roque, Cristina, additional, Piotrowski, Alex, additional, Skinner, Luke, additional, Sierro, Francisco, additional, Terrinha, Pedro, additional, Cornen, Guy, additional, Reguera, María Isabel, additional, Lozano-Luz, Rocío, additional, and Bravo, Natalia, additional

Published
2020
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14. Consistently dated Atlantic sediment cores over the last 40 thousand years

Author

Stratigraphy and paleontology, Stratigraphy & paleontology, Waelbroeck, Claire, Lougheed, Bryan C., Vazquez Riveiros, Natalia, Missiaen, Lise, Pedro, Joel, Dokken, Trond, Hajdas, Irka, Wacker, Lukas, Abbott, Peter, Dumoulin, Jean Pascal, Thil, François, Eynaud, Frédérique, Rossignol, Linda, Fersi, Wiem, Albuquerque, Ana Luiza, Arz, Helge, Austin, William E.N., Came, Rosemarie, Carlson, Anders E., Collins, James A., Dennielou, Bernard, Desprat, Stéphanie, Dickson, Alex, Elliot, Mary, Farmer, Christa, Giraudeau, Jacques, Gottschalk, Julia, Henderiks, Jorijntje, Hughen, Konrad, Jung, Simon, Knutz, Paul, Lebreiro, Susana, Lund, David C., Lynch-Stieglitz, Jean, Malaizé, Bruno, Marchitto, Thomas, Martínez-Méndez, Gema, Mollenhauer, Gesine, Naughton, Filipa, Nave, Silvia, Nürnberg, Dirk, Oppo, Delia, Peck, Victoria, Peeters, Frank J.C., Penaud, Aurélie, Portilho-Ramos, Rodrigo da Costa, Repschläger, Janne, Roberts, Jenny, Rühlemann, Carsten, Salgueiro, Emilia, Sanchez Goni, Maria Fernanda, Schönfeld, Joachim, Scussolini, Paolo, Skinner, Luke C., Skonieczny, Charlotte, Thornalley, David, Toucanne, Samuel, Rooij, David Van, Vidal, Laurence, Voelker, Antje H.L., Wary, Mélanie, Weldeab, Syee, Ziegler, Martin, Stratigraphy and paleontology, Stratigraphy & paleontology, Waelbroeck, Claire, Lougheed, Bryan C., Vazquez Riveiros, Natalia, Missiaen, Lise, Pedro, Joel, Dokken, Trond, Hajdas, Irka, Wacker, Lukas, Abbott, Peter, Dumoulin, Jean Pascal, Thil, François, Eynaud, Frédérique, Rossignol, Linda, Fersi, Wiem, Albuquerque, Ana Luiza, Arz, Helge, Austin, William E.N., Came, Rosemarie, Carlson, Anders E., Collins, James A., Dennielou, Bernard, Desprat, Stéphanie, Dickson, Alex, Elliot, Mary, Farmer, Christa, Giraudeau, Jacques, Gottschalk, Julia, Henderiks, Jorijntje, Hughen, Konrad, Jung, Simon, Knutz, Paul, Lebreiro, Susana, Lund, David C., Lynch-Stieglitz, Jean, Malaizé, Bruno, Marchitto, Thomas, Martínez-Méndez, Gema, Mollenhauer, Gesine, Naughton, Filipa, Nave, Silvia, Nürnberg, Dirk, Oppo, Delia, Peck, Victoria, Peeters, Frank J.C., Penaud, Aurélie, Portilho-Ramos, Rodrigo da Costa, Repschläger, Janne, Roberts, Jenny, Rühlemann, Carsten, Salgueiro, Emilia, Sanchez Goni, Maria Fernanda, Schönfeld, Joachim, Scussolini, Paolo, Skinner, Luke C., Skonieczny, Charlotte, Thornalley, David, Toucanne, Samuel, Rooij, David Van, Vidal, Laurence, Voelker, Antje H.L., Wary, Mélanie, Weldeab, Syee, and Ziegler, Martin

Published
2019

19. Carta geoambiental da região da Grande Beira

Author

Oliveira, José Tomás, Milisse, Dino, Daudi, Elias Félix, Ramalho, Elsa, Fernandes, Judite, Quental, Lídia, Batista, Maria Joao, Dias, Ruben Pereira, Ussene, Ussene Vasco, Magaia, Almiro, Muchanga, André, Muchibane, Aníbal, Zeferino, Cátia Lídia, Balate, Gabriel, Gomane, Gertrudes, Cune, Grácio, Rebêlo, Luís Pina, Nave, Silvia, Manhiça, Vladimiro, and Pereira, Aurete

Subjects
Ambiente, Detecção remota, Prospecção geofísica, Cartografia geoambiental, Moçambique, Carta geoambiental, Qualidade do ambiente, Sustentabilidade, Águas subterrâneas, SIG, Beira (Moçambique)
Published
2013

24. Benchmarks and sediment source(s) of the 1755 Lisbon tsunami deposit at Boca do Rio Estuary

Author

Font, Eric, Veiga-Pires, C., Pozo, Manuel, Nave, Silvia, Costas, Susana, Muñoz, Francisco Ruiz, Abad, Manuel, Simões, Nuno, and Duarte, Sílvia

Subjects
Estuary, Hydrodynamics, Tsunami deposit, Mineralogy, Geochemical proxies
Abstract

Standardizing tite signature of tsunami deposits has been pointed as a major limitation on the identification paleo-tsunaml deposits. This limitation majorly arises from the strongly source-dependent nature of these deposits, which in turn determines their composition and Structure, and from the effect of the local morphology of the corresponding depositional environmemt. Here, we provide new high-resolution mineralogical, geochemical and paleontological data of the 1755 tsunami layer of Boca do Rio estuary (Algarve-Portugal.

Published
2012

27. Sedimentos marinhos : caracterização química expedita por espectrometria de fluorescência de raios X = Marine sediments : an easy-and-quick chemical characterization through X-ray fluorescence spectrometry

Author

Figueiredo, M. Ondina, Nave, Silvia, and Silva, Teresa

Subjects
Espectrometria de raios X, Geoquímica, Fluorescência de raios-X, Sedimentos marinhos
Abstract

Com o objectivo de obter dados químicos sobre sedimentos marinhos em tempo reduzido e por uma via expedita, desenvolveu-se uma metodologia analítica baseada em espectrometria de fluorescência de raios X por dispersão em comprimentos de onfa (FRX-DCO). Descreve-se esta metodologia expedita não destrutiva e apresentam-se os primeiros resultados relativos a uma secção de uma sondagem de sedimentos marinhos, testados com sucesso por comparação com dados obtidos por uma técnica analítica de aplicação corrente.

Published
2010

28. Variações da produtividade oceânica ao largo da Península Ibérica durante o MIS 5 e a sua relação com a Circulação Thermohalina = Open ocean productivity changes off Iberia during MIS 5 and its relation to the Atlantic Meridional Overturning Circulation

Author

Nave, Silvia, Lebreiro, Susana, Kissel, Catherine, Guihou, Abel, Figueiredo, M. Ondina, Silva, Teresa, Michel, Elizabeth, Cortijo, Elisa, Labeyrie, Laurent, and Voelker, Antje H. L.

Subjects
Granulometria, Corrente marinha, Foraminíferos bentónicos, Oceanografia, Geologia marinha, Circulação oceânica, Nutrientes
Abstract

O estudo mostrou que a produtividade oceânica ao largo da costa ocidental Portuguesa é maior durante as fases frias do Estádio 5 e durante os Estádios Glaciares 4 e 6, sugerindo uma maior disponibilidade de nutrientes durante esses períodos. Os dados de d13C, variações da granulometria e parâmetros magnéticos, sugerem correntes de fundo mais fortes durante os períodos frios, concordantes com uma maior contribuição das correntes de fundo austrais na margem Este do Atlântico Norte. Os nossos dados sugerem uma ligação entre a variação da produtividade oceânica e a circulação termohalina.

Published
2010

32. Glacial‐interglacial circulation changes inferred from 231Pa/230Th sedimentary record in the North Atlantic region

Author

Gherardi, J.‐M., Labeyrie, L., Nave, Silvia, Francois, Roger, McManus, Jerry F., Cortijo, E., Gherardi, J.‐M., Labeyrie, L., Nave, Silvia, Francois, Roger, McManus, Jerry F., and Cortijo, E.

Abstract

Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 24 (2009): PA2204, doi:10.1029/2008PA001696., Studies from the subtropical western and eastern Atlantic Ocean, using the 231Pa/230Th ratio as a kinematic proxy for deep water circulation, provided compelling evidence for a strong link between climate and the rate of meridional overturning circulation (MOC) over the last deglaciation. In this study, we present a compilation of existing and new sedimentary 231Pa/230Th records from North Atlantic cores between 1710 and 4550 m water depth. Comparing sedimentary 231Pa/230Th from different depths provides new insights into the evolution of the geometry and rate of deep water formation in the North Atlantic during the last 20,000 years. The 231Pa/230Th ratio measured in upper Holocene sediments indicates slow water renewal above ∼2500 m and rapid flushing below, consistent with our understanding of modern circulation. In contrast, during the Last Glacial Maximum (LGM), Glacial North Atlantic Intermediate Water (GNAIW) drove a rapid overturning circulation to a depth of at least ∼3000 m depth. Below ∼4000 m, water renewal was much slower than today. At the onset of Heinrich event 1, transport by the overturning circulation declined at all depths. GNAIW shoaled above 3000 m and significantly weakened but did not totally shut down. During the Bølling‐Allerød (BA) that followed, water renewal rates further decreased above 2000 m but increased below. Our results suggest for the first time that ocean circulation during that period was quite distinct from the modern circulation mode, with a comparatively higher renewal rate above 3000 m and a lower renewal rate below in a pattern similar to the LGM but less accentuated. MOC during the Younger Dryas appears very similar to BA down to 2000 m and slightly slower below., The LSCE-WHOI cooperation has been supported by a NSF-CNRS cooperative grant NSF INT-0233483. Analytical measurements in LSCE have been supported by French Programme National d’Etude de la Dynamique du Climat, Commissariat a` l’Energie Atomique, and Centre National de la Recherche Scientifique. The participation of J.F.M. in this project was supported in part by grants from the U.S.-NSF, WHOI-OCCI, and the Gary Comer Science and Education Foundation. R.F.’s participation was supported by grants from NSERC and the Canadian Foundation for Climate and Atmospheric Science.

Published
2010

33. Glacial‐interglacial circulation changes inferred from 231Pa/230Th sedimentary record in the North Atlantic region

Author

Gherardi, J.‐M., Labeyrie, L., Nave, Silvia, Francois, Roger, McManus, Jerry F., Cortijo, E., Gherardi, J.‐M., Labeyrie, L., Nave, Silvia, Francois, Roger, McManus, Jerry F., and Cortijo, E.

Abstract

Studies from the subtropical western and eastern Atlantic Ocean, using the 231Pa/230Th ratio as a kinematic proxy for deep water circulation, provided compelling evidence for a strong link between climate and the rate of meridional overturning circulation (MOC) over the last deglaciation. In this study, we present a compilation of existing and new sedimentary 231Pa/230Th records from North Atlantic cores between 1710 and 4550 m water depth. Comparing sedimentary 231Pa/230Th from different depths provides new insights into the evolution of the geometry and rate of deep water formation in the North Atlantic during the last 20,000 years. The 231Pa/230Th ratio measured in upper Holocene sediments indicates slow water renewal above ∼2500 m and rapid flushing below, consistent with our understanding of modern circulation. In contrast, during the Last Glacial Maximum (LGM), Glacial North Atlantic Intermediate Water (GNAIW) drove a rapid overturning circulation to a depth of at least ∼3000 m depth. Below ∼4000 m, water renewal was much slower than today. At the onset of Heinrich event 1, transport by the overturning circulation declined at all depths. GNAIW shoaled above 3000 m and significantly weakened but did not totally shut down. During the Bølling‐Allerød (BA) that followed, water renewal rates further decreased above 2000 m but increased below. Our results suggest for the first time that ocean circulation during that period was quite distinct from the modern circulation mode, with a comparatively higher renewal rate above 3000 m and a lower renewal rate below in a pattern similar to the LGM but less accentuated. MOC during the Younger Dryas appears very similar to BA down to 2000 m and slightly slower below.

Published
2009

37. Consistently dated Atlantic sediment cores over the last 40 thousand years

Author

Waelbroeck, Claire, Lougheed, Bryan C., Vazquez Riveiros, Natalia, Missiaen, Lise, Pedro, Joel, Dokken, Trond, Hajdas, Irka, Wacker, Lukas, Abbott, Peter, Dumoulin, Jean-Pascal, Thil, François, Eynaud, Frédérique, Rossignol, Linda, Fersi, Wiem, Albuquerque, Ana Luiza, Arz, Helge, Austin, William E. N., Came, Rosemarie, Carlson, Anders E., Collins, James A., Dennielou, Bernard, Desprat, Stéphanie, Dickson, Alex, Elliot, Mary, Farmer, Christa, Giraudeau, Jacques, Gottschalk, Julia, Henderiks, Jorijntje, Hughen, Konrad, Jung, Simon, Knutz, Paul, Lebreiro, Susana, Lund, David C., Lynch-Stieglitz, Jean, Malaizé, Bruno, Marchitto, Thomas, Martínez-Méndez, Gema, Mollenhauer, Gesine, Naughton, Filipa, Nave, Silvia, Nürnberg, Dirk, Oppo, Delia, Peck, Victoria, Peeters, Frank J. C., Penaud, Aurélie, Portilho-Ramos, Rodrigo Da Costa, Repschläger, Janne, Roberts, Jenny, Rühlemann, Carsten, Salgueiro, Emilia, Sanchez Goni, Maria Fernanda, Schönfeld, Joachim, Scussolini, Paolo, Skinner, Luke C., Skonieczny, Charlotte, Thornalley, David, Toucanne, Samuel, Rooij, David Van, Vidal, Laurence, Voelker, Antje H. L., Wary, Mélanie, Weldeab, Syee, and Ziegler, Martin

Subjects
704/106/2738, Data Descriptor, 13. Climate action, 14. Life underwater, 704/106/413, data-descriptor
Abstract

Rapid changes in ocean circulation and climate have been observed in marine-sediment and ice cores over the last glacial period and deglaciation, highlighting the non-linear character of the climate system and underlining the possibility of rapid climate shifts in response to anthropogenic greenhouse gas forcing. To date, these rapid changes in climate and ocean circulation are still not fully explained. One obstacle hindering progress in our understanding of the interactions between past ocean circulation and climate changes is the difficulty of accurately dating marine cores. Here, we present a set of 92 marine sediment cores from the Atlantic Ocean for which we have established age-depth models that are consistent with the Greenland GICC05 ice core chronology, and computed the associated dating uncertainties, using a new deposition modeling technique. This is the first set of consistently dated marine sediment cores enabling paleoclimate scientists to evaluate leads/lags between circulation and climate changes over vast regions of the Atlantic Ocean. Moreover, this data set is of direct use in paleoclimate modeling studies.

38. Consistently dated Atlantic sediment cores over the last 40 thousand years

Author

Waelbroeck, Claire, Lougheed, Bryan C, Vazquez Riveiros, Natalia, Missiaen, Lise, Pedro, Joel, Dokken, Trond, Hajdas, Irka, Wacker, Lukas, Abbott, Peter, Dumoulin, Jean-Pascal, Thil, François, Eynaud, Frédérique, Rossignol, Linda, Fersi, Wiem, Albuquerque, Ana Luiza, Arz, Helge, Austin, William EN, Came, Rosemarie, Carlson, Anders E, Collins, James A, Dennielou, Bernard, Desprat, Stéphanie, Dickson, Alex, Elliot, Mary, Farmer, Christa, Giraudeau, Jacques, Gottschalk, Julia, Henderiks, Jorijntje, Hughen, Konrad, Jung, Simon, Knutz, Paul, Lebreiro, Susana, Lund, David C, Lynch-Stieglitz, Jean, Malaizé, Bruno, Marchitto, Thomas, Martínez-Méndez, Gema, Mollenhauer, Gesine, Naughton, Filipa, Nave, Silvia, Nürnberg, Dirk, Oppo, Delia, Peck, Victoria, Peeters, Frank JC, Penaud, Aurélie, Portilho-Ramos, Rodrigo Da Costa, Repschläger, Janne, Roberts, Jenny, Rühlemann, Carsten, Salgueiro, Emilia, Sanchez Goni, Maria Fernanda, Schönfeld, Joachim, Scussolini, Paolo, Skinner, Luke C, Skonieczny, Charlotte, Thornalley, David, Toucanne, Samuel, Rooij, David Van, Vidal, Laurence, Voelker, Antje HL, Wary, Mélanie, Weldeab, Syee, and Ziegler, Martin

Subjects
13 Climate Action, 13. Climate action, 37 Earth Sciences, 3705 Geology, 14. Life underwater, 3709 Physical Geography and Environmental Geoscience, 14 Life Below Water
Abstract

Rapid changes in ocean circulation and climate have been observed in marine-sediment and ice cores over the last glacial period and deglaciation, highlighting the non-linear character of the climate system and underlining the possibility of rapid climate shifts in response to anthropogenic greenhouse gas forcing. To date, these rapid changes in climate and ocean circulation are still not fully explained. One obstacle hindering progress in our understanding of the interactions between past ocean circulation and climate changes is the difficulty of accurately dating marine cores. Here, we present a set of 92 marine sediment cores from the Atlantic Ocean for which we have established age-depth models that are consistent with the Greenland GICC05 ice core chronology, and computed the associated dating uncertainties, using a new deposition modeling technique. This is the first set of consistently dated marine sediment cores enabling paleoclimate scientists to evaluate leads/lags between circulation and climate changes over vast regions of the Atlantic Ocean. Moreover, this data set is of direct use in paleoclimate modeling studies.

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