EGU2020-21510, updated on 20 Apr 2022
https://doi.org/10.5194/egusphere-egu2020-21510
EGU General Assembly 2020
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Variations of surface waters characteristics in the Eastern Arctic Ocean in 2010-2019 at different scales: in situ and satellite study

Anastasiia Tarasenko1,2, Alexandre Supply3, Jacqueline Boutin3, Nikita Kusse-Tiuz2, Mikhail Makhotin2, Vladimir Ivanov2,4, and Gilles Reverdin3
Anastasiia Tarasenko et al.
  • 1Ifremer, Plouzané, France
  • 2Arctic and Antarctic Research Institute, Saint-Petersburg, Russia
  • 3Sorbonne Université, CNRS, IRD, MNHN, Laboratoire d’Océanographie et du Climat, Expérimentations et Approches Numériques (LOCEAN), Paris, France
  • 4Moscow State University, Moscow, Russia

The last 10 years of Arctic Ocean observations showed the dramatic changes and new records of the sea ice minimum. The largest variations were observed in the Eastern Arctic: the Kara, the Laptev, the East-Siberian seas. This region is a key area of the important freshwater input from the great Siberian rivers (Ob’, Yenisei, Lena). This remote area remains one of the less studied in the Arctic Ocean, although several regular expeditions (such as NABOS or Transdrift) together with special expeditions following the Northern Route, such as Tara-2013 expedition, or recent Transarktika-2019 expedition help to monitor the changes of surface waters in recent years.

The use of new satellite-derived datasets, (e.g., SST blended product from Danish Meteorological Institute or REMSS, SSS SMOS from LOCEAN University of Sorbonne) fill the gaps and help to better understand the complex dynamics of surface waters in the Eastern Arctic ocean.

In this work, we discuss the surface waters variations using in situ and satellite data at different scales.  Synoptic scales are studied with continuous and point in situ measurements (thermosalinographs and CTD data). The recent scientific results of Transarktika-2019 expedition are presented. In the summer season of 2019 (July-October) Transarktika expedition did oceanographic measurements following the Northern Route twice, from Vladivistok to Murmansk and back to Vladivostok. The seasonal variations are analyzed over the period of 10 years, comparing with climatological data. The difference between the climatological values of SST or SSS can reach 5 or more units in some areas of the Eastern Arctic. The results of interannual variations analysis using satellite data, suggest the salinification (“Atlantification”) of the southern areas and freshening of the northern parts of the Eastern Arctic.

The development of SSS SMOS Arctic product was supported by the French CNES-TOSCA SMOS-OCEAN project. Anastasiia Tarasenko, Nikita Kusse-Tiuz, Mikhail Makhotin and Vladimir Ivanov acknowledge financial support from the Ministry of Science and Higher Education of the Russian Federation, project RFMEFI61619X0108

How to cite: Tarasenko, A., Supply, A., Boutin, J., Kusse-Tiuz, N., Makhotin, M., Ivanov, V., and Reverdin, G.: Variations of surface waters characteristics in the Eastern Arctic Ocean in 2010-2019 at different scales: in situ and satellite study, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-21510, https://doi.org/10.5194/egusphere-egu2020-21510, 2020.