On the observed connection between Arctic sea ice and Eurasian snow in relation to the winter North Atlantic Oscillation

Sea ice concentration (SIC) in the eastern Arctic and snow cover extent (SCE) over central Eurasia in late autumn have been proposed as potential predictors of the winter North Atlantic Oscillation (NAO). Here, maximum covariance analysis is used to further investigate the links between autumn SIC i...

Full description

Bibliographic Details
Published in:Environmental Research Letters
Main Authors: María Santolaria-Otín, Javier García-Serrano, Martin Ménégoz, Joan Bech
Format: Article in Journal/Newspaper
Language:English
Published: IOP Publishing 2021
Subjects:
North Atlantic Oscillation
teleconnection
sea ice
snow cover
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
Science
Q
Physics
QC1-999
Arctic
North Atlantic
North Atlantic oscillation
Sea ice
Online Access:https://doi.org/10.1088/1748-9326/abad57
https://doaj.org/article/fc73dc9c108546498bb762bd39fd3712
Description
Summary:Sea ice concentration (SIC) in the eastern Arctic and snow cover extent (SCE) over central Eurasia in late autumn have been proposed as potential predictors of the winter North Atlantic Oscillation (NAO). Here, maximum covariance analysis is used to further investigate the links between autumn SIC in the Barents-Kara Seas (BK) and SCE over Eurasia (EUR) with winter sea level pressure (SLP) in the North Atlantic-European region over 1979-2019. As shown by previous studies, the most significant covariability mode of SIC/BK is found for November. Similarly, the covariability with SCE/EUR is only statistically significant for November, not for October. Changes in temperature, specific humidity, SIC/BK and SCE/EUR in November are associated with a circulation anomaly over the Ural-Siberian region that appears as a precursor of the winter NAO; where the advection of climatological temperature/humidity by the anomalous flow is related to SCE/EUR and SIC/BK anomalies.

Similar Items