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

Popova, V.V.; Bokuchava, D.D.

Авторы: Popova V.V., Bokuchava D.D.
Сборник: Proc. SPIE 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 112088A (18
Серия: International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics
Том: 11208
Год издания: 2019
Первая страница: 112088A-1
Последняя страница: 112088A-6
DOI: 10.1117/12.2540953
Аннотация: 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 EOF3 responsible for 56% of temperature variability in the northeast Atlantic and over the Barents sea.
Добавил в систему: Попова Валерия Васильевна

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Changes of the atmospheric circulation patterns over Northern Hemisphere extratropical zone since the mid of XX centuryстатья

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