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| Holliday, N. Penny; Bersch, Manfred; Berx, Barbara; Chafik, Léon; Cunningham, Stuart; Florindo-lópez, Cristian; Hátún, Hjálmar; Johns, William; Josey, Simon A.; Larsen, Karin Margretha H.; Mulet, Sandrine; Oltmanns, Marilena; Reverdin, Gilles; Rossby, Tom; Thierry, Virginie; Valdimarsson, Hedinn; Yashayaev, Igor. |
| The Atlantic Ocean overturning circulation is important to the climate system because it carries heat and carbon northward, and from the surface to the deep ocean. The high salinity of the subpolar North Atlantic is a prerequisite for overturning circulation, and strong freshening could herald a slowdown. We show that the eastern subpolar North Atlantic underwent extreme freshening during 2012 to 2016, with a magnitude never seen before in 120 years of measurements. The cause was unusual winter wind patterns driving major changes in ocean circulation, including slowing of the North Atlantic Current and diversion of Arctic freshwater from the western boundary into the eastern basins. We find that wind-driven routing of Arctic-origin freshwater intimately... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00606/71816/70319.pdf |
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| Reverdin, Gilles; Metzl, Nicolas; Olafsdottir, Solveig; Racape, Virginie; Takahashi, Taro; Benetti, Marion; Valdimarsson, Hedinn; Benoit-cattin, Alice; Danielsen, Magnus; Fin, Jonathan; Naamar, Aicha; Pierrot, Denis; Sullivan, Kevin; Bringas, Francis; Goni, Gustavo. |
| This paper presents the SURATLANT data set (SURveillance ATLANTique). It consists of individual data of temperature, salinity, parameters of the carbonate system, nutrients, and water stable isotopes (delta O-18 and delta D) collected mostly from ships of opportunity since 1993 along transects between Iceland and New-foundland (https://doi.org/10.17882/54517). We discuss how the data are validated and qualified, their accuracy, and the overall characteristics of the data set. The data are used to reconstruct seasonal cycles and interannual anomalies, in particular of sea surface salinity (S SS); inorganic nutrients; dissolved inorganic carbon (DIC); and its isotopic composition delta C-13(DIC), total alkalinity (A(t)), and water isotope concentrations.... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00466/57721/59911.pdf |
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| Gonzalez-pola, Cesar; Fratantoni, Paula; Larsen, Karin M. H.; Holliday, N. Penny; Dye, Stephen; Mork, Kjell Arne; Beszczynska-moller, Agnieszka; Valdimarsson, Hedinn; Trofimov, Alexander; Parner, Hjalte; Klein, Holger; Cisewski, Boris; Fontan, Almudena; Lyons, Kieran; Kolodziejczyk, Nicolas; Grana, Rocio; Linders, Johanna; Wodzinowski, Tycjan; Goszczko, Ilona; Cusack, Caroline. |
| The ICES (International Council for the Exploration of the Sea) Working Group on Oceanic Hydrography (WGOH) was established in the late 1970's with the aim of gathering experts in physical oceanography to provide regular science-based assessments of the North Atlantic hydrographical condition (basically termohaline fields). From the beginning, the WGOH has relied on repeated long-term in-situ sampling at key sites around the North Atlantic, the Nordic Seas and adjacent shelf seas. An annual Report on Ocean Climate (IROC), produced by the WGOH since the late 1990's, summarizes trends in regional hydrography and identifies patterns linking these changes across the North Atlantic. Regional analyses are prepared by local experts who are directly involved in... |
| Tipo: Text |
Palavras-chave: Ocean climate; Hydrography; Timeseries; In-situ sampling; Periodical report; Science to policy; North Atlantic. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00488/59977/63224.pdf |
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