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Discussion papers
https://doi.org/10.5194/os-2019-60
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-2019-60
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 31 Jul 2019

Submitted as: research article | 31 Jul 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Ocean Science (OS).

Surface waters properties in the Laptev and the East-Siberian Seas in summer 2018 from in situ and satellite data

Anastasiia Tarasenko1,2, Alexandre Supply3, Nikita Kusse-Tiuz1, Vladimir Ivanov1, Mikhail Makhotin1, Jean Tournadre2, Bertrand Chapron2, Jacqueline Boutin3, and Nicolas Kolodziejczyk2 Anastasiia Tarasenko et al.
  • 1Arctic and Antarctic Research Institute, Saint-Petersburg, Russia
  • 2Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d’Océanographie Physique et Spatiale (LOPS), IUEM, Brest 29280, France
  • 3Sorbonne Université, CNRS, IRD, MNHN, Laboratoire d’Océanographie et du Climat, Expérimentations et Approches Numériques (LOCEAN), Paris, France

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 was collected during ARKTIKA-2018 expedition and then completed with satellite estimates of sea surface temperature (SST) and salinity (SSS), sea surface height, satellite-derived wind speeds and sea ice concentrations. Derivation of SSS is still challenging in high latitude regions, and the quality of Soil Moisture and Ocean Salinity (SMOS) SSS retrieval was improved by applying a threshold on SSS weekly error. The validity of SST and SSS products is demonstrated using ARKTIKA-2018 continuous thermosalinograph measurements and CTD casts. The surface gradients and mixing of river and sea waters in the free of ice and ice covered areas is described with a special attention to the marginal ice zone. The Ekman transport was calculated to better understand the pathway of surface water displacement. T-S diagram using surface satellite estimates shows a possibility to investigate the surface water masses transformation in detail.

Anastasiia Tarasenko et al.
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Short summary
Data from the ARKTIKA-2018 expedition and new satellite data help better understand the upper layer of Laptev and East-Siberian seas (LS and ESS). With an improved method of the surface salinity estimates from space and satellite wind, we follow distribution and mixing of the Lena river and other waters in summer 2018. Prevailing winds push it far north of the LS and under the ice of the ESS and generate vast downwelling in LS in August. Proposed water mass classification indicates water origin.
Data from the ARKTIKA-2018 expedition and new satellite data help better understand the upper...
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