Anthropogenic intensification of Arctic anticyclonic circulation.

However, both observations and AER simulations show a decreasing trend in aerosol optical depth (AOD) in the Arctic, especially in the European sector (fig.

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This is particularly evident in winter, when a significant strengthening of the anticyclonic anomaly (a positive trend in geopotential height) over the Barents-Kara Sea (BKS) has been observed ( Fig. 1 ) ( 13 , 15 , 23 – 26 ).

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