Winter to summer oceanographic observations in the Arctic Ocean north of Svalbard

• Published in: Journal of Geophysical Research: Oceans
• Main Authors: Meyer, Amelie, Sundfjord, Arild, Fer, Ilker, Provost, Christine, Villacieros Robineau, Nicolas, Koenig, Zoé, Onarheim, Ingrid H., Smedsrud, Lars H., Duarte, Pedro, Dodd, Paul A., Graham, Robert M., Schmidtko, Sunke, Kauko, Hanna M.
• Other Authors: Norwegian Polar Institute, Geophysical Institute Bergen (GFI / BiU), University of Bergen (UiB), Bjerknes Centre for Climate Research (BCCR), Department of Biological Sciences Bergen (BIO / UiB), University of Bergen (UiB)-University of Bergen (UiB), Austral, Boréal et Carbone (ABC), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Helmholtz Centre for Ocean Research Kiel (GEOMAR), ANR-10-EQPX-0013,PLANAQUA,PLAteforme expérimentale NAtionale d'écologie aQUAtique(2010), European Project: 603887,EC:FP7:ENV,FP7-ENV-2013-two-stage,ICE-ARC(2014)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2017
• Subjects: [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph]; [SDU]Sciences of the Universe [physics]; Arctic; Arctic Ocean; Svalbard; Yermak Plateau; Sea ice; Yermak plateau
• Online Access: https://hal.archives-ouvertes.fr/hal-01492014; https://hal.archives-ouvertes.fr/hal-01492014/document; https://hal.archives-ouvertes.fr/hal-01492014/file/JGR%20Oceans%20-%202017%20-%20Meyer%20-%20Winter%20to%20summer%20oceanographic%20observations%20in%20the%20Arctic%20Ocean%20north%20of%20Svalbard.pdf; https://doi.org/10.1002/2016JC012391

accepted paper International audience Oceanographic observations from the Eurasian Basin north of Svalbard collected betweenJanuary and June 2015 from the N-ICE2015 drifting expedition are presented. The unique winter observa-tions are a key contribution to existing climatologies of the Arctic Ocean, and show a $\sim$100 m deep wintermixed layer likely due to high sea ice growth rates in local leads. Current observations for the upper$\sim$ 200 m show mostly a barotropic flow, enhanced over the shallow Yermak Plateau. The two branches ofinflowing Atlantic Water are partly captured, confirming that the outer Yermak Branch follows the perimeterof the plateau, and the inner Svalbard Branch the coast. Atlantic Water observed to be warmer andshallower than in the climatology, is found directly below the mixed layer down to 800 m depth, and iswarmest along the slope, while its properties inside the basin are quite homogeneous. From late Mayonwards, the drift was continually close to the ice edge and a thinner surface mixed layer and shallowerAtlantic Water coincided with significant sea ice melt being observed.