Properties of surface water masses in the Laptev and the East Siberian seas in summer 2018 from in situ and satellite data

Type Article
Date 2021-02
Language English
Author(s) Tarasenko AnastasiiaORCID1, 4, Supply Alexandre3, Kusse-Tiuz NikitaORCID1, Ivanov VladimirORCID1, Makhotin Mikhail1, Tournadre JeanORCID2, 4, Chapron Bertrand2, Boutin JacquelineORCID3, Kolodziejczyk NicolasORCID4, Reverdin GillesORCID3
Affiliation(s) 1 : Arctic and Antarctic Research Institute, Depatment of Oceanology, 199397 Saint Petersburg, Russia
2 : Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Brest 29280, France
3 : Sorbonne Université, CNRS, IRD, MNHN, Laboratoire d'Océanographie et du Climat, Expérimentations et Approches Numériques (LOCEAN), 75005 Paris, France
4 : Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Brest 29280, France
Source Ocean Science (1812-0784) (Copernicus GmbH), 2021-02 , Vol. 17 , N. 1 , P. 221-247
DOI 10.5194/os-17-221-2021
WOS© Times Cited 2
Abstract

Variability of surface water masses of the Laptev and the East Siberian seas in August–September 2018 is studied using in situ and satellite data. In situ data were collected during the ARKTIKA-2018 expedition and then complemented with satellite-derived sea surface temperature (SST), salinity (SSS), sea surface height, wind speed, and sea ice concentration. The estimation of SSS fields is challenging in high-latitude regions, and the precision of soil moisture and ocean salinity (SMOS) SSS retrieval is improved by applying a threshold on SSS weekly error. For the first time in this region, the validity of DMI (Danish Meteorological Institute) SST and SMOS SSS products is thoroughly studied using ARKTIKA-2018 expedition continuous thermosalinograph measurements and conductivity–temperature–depth (CTD) casts. They are found to be adequate to describe large surface gradients in this region. Surface gradients and mixing of the river and the sea water in the ice-free and ice-covered areas are described with a special attention to the marginal ice zone at a synoptic scale. We suggest that the freshwater is pushed northward, close to the marginal ice zone (MIZ) and under the sea ice, which is confirmed by the oxygen isotope analysis. The SST-SSS diagram based on satellite estimates shows the possibility of investigating the surface water mass transformation at a synoptic scale and reveals the presence of river water on the shelf of the East Siberian Sea. The Ekman transport is calculated to better understand the pathway of surface water displacement on the shelf and beyond.

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Tarasenko Anastasiia, Supply Alexandre, Kusse-Tiuz Nikita, Ivanov Vladimir, Makhotin Mikhail, Tournadre Jean, Chapron Bertrand, Boutin Jacqueline, Kolodziejczyk Nicolas, Reverdin Gilles (2021). Properties of surface water masses in the Laptev and the East Siberian seas in summer 2018 from in situ and satellite data. Ocean Science, 17(1), 221-247. Publisher's official version : https://doi.org/10.5194/os-17-221-2021 , Open Access version : https://archimer.ifremer.fr/doc/00678/79015/