Alkenone distributions in the North Atlantic and Nordic sea surface waters

International audience The C37–C39 alkenones were quantified in suspended particulate matter obtained from the surface waters of the North Atlantic, including the Nordic seas, over a temperature range of 4°–20°C. U37K′ values were linearly correlated to temperature over the entire range covered by o...

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Published in:Geochemistry, Geophysics, Geosystems
Main Authors: Sicre, Marie-Alexandrine, Bard, Edouard, Ezat, Ullah, Rostek, Frauke
Other Authors: Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Paléocéanographie (PALEOCEAN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Collège de France - Chaire Evolution du climat et de l'océan, Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2002
Subjects:
Online Access:https://hal.science/hal-03127300
https://hal.science/hal-03127300/document
https://hal.science/hal-03127300/file/2001GC000159.pdf
https://doi.org/10.1029/2001gc000159
Description
Summary:International audience The C37–C39 alkenones were quantified in suspended particulate matter obtained from the surface waters of the North Atlantic, including the Nordic seas, over a temperature range of 4°–20°C. U37K′ values were linearly correlated to temperature over the entire range covered by our data set, i.e., 4°–20°C (U37K′ = 0.027T + 0.036, r2 = 0.97). The compilation of water column data from the Atlantic, Pacific, and Southern Ocean and Mediterranean Sea suggests that the linear model may not be the best function for fitting U37K′ and in situ temperature values. It also shows that suspended matter data from warm waters (T > 20°C) are still needed to constrain the equation of the global curve. High abundances of C37:4 were found in the coldest polar waters. Around 4°C, 7:4 represented up to 35%, a value that dropped to zero at temperatures above 10°C. Values of 7:4 were linearly correlated to temperature (7:4 = −3.7T + 43.7, r2 = 0.50) and salinity (7:4 = −48.1S‰ + 1691, r2 = 0.78). Further investigations from other oceanic basins are necessary to confirm these findings