Sea ice decline in the Eastern Arctic results in expansion of the freshened surface layer DOI Creative Commons

Vladimir Rogozhin,

Alexander Osadchiev, A. V. Savin

et al.

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: May 19, 2025

In this study, we report an anomalously large freshened surface layer in the Eastern Arctic during ice-free season 2019. This is formed by river discharge and sea ice meltwater also referred to as Lena plume, due River its major freshwater source. Based on situ satellite data, demonstrate that August-September 2019 plume extended from Delta west Wrangel Island east, i.e., zonal extent was approximately 2000 km. The area of varied between 750 000 870 km 2 period, which 1.5 times greater than assessment maximal previous years, albeit they were often hindered presence coverage. main reasons for anomalous spreading are following. First, intense melting provided a significantly volume inflow layer, compared other years. Second, cleared out Laptev East Siberian seas beginning August September respectively, these remained free 3 months (longer period occurred only 2007 2020). Three favorable wind forcing July-September caused extensive eastward northward expansion, together with changes vertical structure plume. expansion affected composition phytoplankton communities, intrusion species eastern part Sea. reported under conditions provides baseline forecasting future state large-scale cycle Ocean, expectedly reduced cover.

Language: Английский

Sea ice decline in the Eastern Arctic results in expansion of the freshened surface layer DOI Creative Commons

Vladimir Rogozhin,

Alexander Osadchiev, A. V. Savin

et al.

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: May 19, 2025

In this study, we report an anomalously large freshened surface layer in the Eastern Arctic during ice-free season 2019. This is formed by river discharge and sea ice meltwater also referred to as Lena plume, due River its major freshwater source. Based on situ satellite data, demonstrate that August-September 2019 plume extended from Delta west Wrangel Island east, i.e., zonal extent was approximately 2000 km. The area of varied between 750 000 870 km 2 period, which 1.5 times greater than assessment maximal previous years, albeit they were often hindered presence coverage. main reasons for anomalous spreading are following. First, intense melting provided a significantly volume inflow layer, compared other years. Second, cleared out Laptev East Siberian seas beginning August September respectively, these remained free 3 months (longer period occurred only 2007 2020). Three favorable wind forcing July-September caused extensive eastward northward expansion, together with changes vertical structure plume. expansion affected composition phytoplankton communities, intrusion species eastern part Sea. reported under conditions provides baseline forecasting future state large-scale cycle Ocean, expectedly reduced cover.

Language: Английский

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