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Changes of the atmospheric circulation patterns over Northern Hemisphere extratropical zone since the mid of XX century
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Paper Abstract

Empirical orthogonal functions (EOF) of the geopotential height of 500 hPa variability over the extratropical zone of the Northern Hemisphere in winter season on the base of 30-year running periods are examined in order to reveal change in the atmospheric circulation patterns for 1948-2018. Analysis of the first EOF patterns and their features associated with changes in the intensity and localization of the atmospheric centers of action shows significant shifts the regional structure of the geopotential height anomalies. Comparison of the first five EOFs contribution to the total variability for two periods: 1968-1997 (warming of temperate NH latitudes) and 1988-2017 (sharp warming of the Arctic), reveals definite changes in the structure of circulation variability at the turn of the 20th and 21st centuries, primarily the prevalence of their negative phase occurrence and the increasing role of regional centers of action, in particular ЭОΦ3 responsible for 56% of temperature variability in the northeast Atlantic and over the Barents sea.

Paper Details

Date Published: 18 December 2019
PDF: 6 pages
Proc. SPIE 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 112088A (18 December 2019); doi: 10.1117/12.2540953
Show Author Affiliations
V. V. Popova, Institute of Geography RAS (Russian Federation)
A.M. Obukhov Institute of Atmospheric Physics RAS (Russian Federation)
D. D. Bokuchava, Institute of Geography RAS (Russian Federation)
A.M. Obukhov Institute of Atmospheric Physics RAS (Russian Federation)


Published in SPIE Proceedings Vol. 11208:
25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Oleg A. Romanovskii; Gennadii G. Matvienko, Editor(s)

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