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Record high Pacific Arctic seawater temperatures and delayed sea ice advance in response to episodic atmospheric blocking

Earth Sciences

Record high Pacific Arctic seawater temperatures and delayed sea ice advance in response to episodic atmospheric blocking

T. Kodaira, T. Waseda, et al.

This study by Tsubasa Kodaira, Takuji Waseda, Takehiko Nose, and Jun Inoue reveals astonishing findings about the record high seawater temperatures in the Pacific Arctic in autumn 2018 and their impact on sea ice advance. Unraveling the effects of unusual warm water from the Bering Sea, this research points to a significant delay in ice formation, with implications for future Arctic conditions.

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Playback language: English
Abstract
This study investigates the record high Pacific Arctic seawater temperatures in autumn 2018 and the subsequent delay in sea ice advance. Anomalous warm seawater, exceeding previous records, was observed despite a neutral Pacific Decadal Oscillation (PDO) index. This warming is attributed to southerly winds associated with episodic atmospheric blocking over the Bering Sea. The warm water significantly delayed sea ice advance, as confirmed by the R/V Mirai Arctic Expedition. Future atmospheric blocking during PDO positive phases could dramatically reduce Arctic sea ice extent.
Publisher
Scientific Reports
Published On
Nov 27, 2020
Authors
Tsubasa Kodaira, Takuji Waseda, Takehiko Nose, Jun Inoue
Tags
Pacific Arctic
sea ice advance
seawater temperatures
atmospheric blocking
Bering Sea
polar research
climate change

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