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Akademický článek

Bottom water oxygenation changes in the southwestern Indian Ocean as an indicator for enhanced respired carbon storage since the last glacial inception

Autor: H. E. Amsler, L. M. Thöle, I. Stimac, W. Geibert, M. Ikehara, G. Kuhn, O. Esper, S. L. Jaccard

Publikováno v: Climate of the Past, Vol 18, Pp 1797-1813 (2022)

We present downcore records of redox-sensitive authigenic uranium (U) and manganese (Mn) concentrations based on five marine sediment cores spanning a meridional transect encompassing the Subantarctic and Antarctic zones in the southwestern Indian Oc

Externí odkaz: https://doaj.org/article/21e2874b937e499f98367b2a54135a20

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Akademický článek

Radium-228-derived ocean mixing and trace element inputs in the South Atlantic

Autor: Y.-T. Hsieh, W. Geibert, E. M. S. Woodward, N. J. Wyatt, M. C. Lohan, E. P. Achterberg, G. M. Henderson

Publikováno v: Biogeosciences, Vol 18, Pp 1645-1671 (2021)

Trace elements (TEs) play important roles as micronutrients in modulating marine productivity in the global ocean. The South Atlantic around 40∘ S is a prominent region of high productivity and a transition zone between the nitrate-depleted subtrop

Externí odkaz: https://doaj.org/article/66dfa5d56e934313acbc0755aa0af532

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Akademický článek

Sea ice dynamics in the Bransfield Strait, Antarctic Peninsula, during the past 240 years: a multi-proxy intercomparison study

Autor: M.-E. Vorrath, J. Müller, L. Rebolledo, P. Cárdenas, X. Shi, O. Esper, T. Opel, W. Geibert, P. Muñoz, C. Haas, G. Kuhn, C. B. Lange, G. Lohmann, G. Mollenhauer

Publikováno v: Climate of the Past, Vol 16, Pp 2459-2483 (2020)

In the last decades, changing climate conditions have had a severe impact on sea ice at the western Antarctic Peninsula (WAP), an area rapidly transforming under global warming. To study the development of spring sea ice and environmental conditions

Externí odkaz: https://doaj.org/article/496c9d5894f4479ab4085dd37868d58e

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Akademický článek

The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation

Autor: M. Dumont, L. Pichevin, W. Geibert, X. Crosta, E. Michel, S. Moreton, K. Dobby, R. Ganeshram

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020)

Global atmospheric CO2 varies between glacial–interglacial cycles. Here, the authors study these changes using Si records and how the Si flux and ocean circulation changes controlled the global Si distribution across the last deglaciation, based on

Externí odkaz: https://doaj.org/article/5577b384c09448919ec90d1c309ed494

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Akademický článek

Decrease in 230Th in the Amundsen Basin since 2007: far-field effect of increased scavenging on the shelf?

Autor: O. Valk, M. M. Rutgers van der Loeff, W. Geibert, S. Gdaniec, S. B. Moran, K. Lepore, R. L. Edwards, Y. Lu, V. Puigcorbé, N. Casacuberta, R. Paffrath, W. Smethie, M. Roy-Barman

Publikováno v: Ocean Science, Vol 16, Pp 221-234 (2020)

This study provides dissolved and particulate 230Th and 232Th results as well as particulate 234Th data collected during expeditions to the central Arctic Ocean (GEOTRACES, an international project to identify processes and quantify fluxes that contr

Externí odkaz: https://doaj.org/article/4e1c4cfb6d2a44f68ccdf5df7541cd82

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Akademický článek

A rapid transition from ice covered CO2–rich waters to a biologically mediated CO2 sink in the eastern Weddell Gyre

Autor: W. Geibert, M. Hoppema, M. Schröder, D. C. E. Bakker, H. J. W. de Baar

Publikováno v: Biogeosciences, Vol 5, Iss 5, Pp 1373-1386 (2008)

Circumpolar Deep Water (CDW), locally called Warm Deep Water (WDW), enters the Weddell Gyre in the southeast, roughly at 25° E to 30° E. In December 2002 and January 2003 we studied the effect of entrainment of WDW on the fugacity of carbon dioxide

Externí odkaz: https://doaj.org/article/4dac17531f6a497d820c42cc166b077f

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Reply to ‘Challenging the hypothesis of an arctic ocean lake during recent glacial episodes’ by Hillaire‐Marcel, et al

Autor: W. GEIBERT, J. MATTHIESSEN, J. WOLLENBURG, R. STEIN

Publikováno v: EPIC3Journal of Quaternary Science, Wiley, 1-4, ISSN: 0267-8179

Hillaire‐Marcelet al. bring forward several physical and geochemical arguments against our finding of an Arctic glaciolacustrine system in the past. In brief, we find that a physical approach to further test our hypothesis should additionally consi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa045e398988f58f57182c2e600bed4c
https://doi.org/10.1002/jqs.3431

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Akademický článek

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226Ra, 228Ra and 40K as tracers of erosion and accumulation processes: A 3-year study on a beach with different sediment dynamics

Autor: H. Alonso, A. Tejera, F. Cámara, Jesús García Rubiano, I. Stimac, P. Martel, W. Geibert, A.C. Arriola-Velásquez, J. G. Guerra

Publikováno v: EPIC3CATENA, Elsevier, 207, pp. 105705, ISSN: 03418162

The aim of this study is to analyse the role of natural radionuclides 226Ra, 228Ra, 40K and unsupported 210Pb (210Pbex), as erosion and accumulation process tracers. For this purpose, a complex system, including both the characteristic dynamics of a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73dd7bdfd42488501959aee055fe9ca1
https://hdl.handle.net/10013/epic.fc7154ab-ae66-42e2-b49a-3076a7265e5e

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Akademický článek

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