Large-scale climatic factors driving glacier recession in the Greater Caucasus, 20th–21st century

Toropov, P.A.; Aleshina, M.A.; Grachev, A.M.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.

Авторы: Toropov P.A., Aleshina M.A., Grachev A.M.
Журнал: International Journal of Climatology
Том: 39
Год издания: 2019
Издательство: John Wiley & Sons Inc.
Местоположение издательства: United States
Первая страница: 4703
Последняя страница: 4720
DOI: 10.1002/joc.6101
Аннотация: Over the past 30 years, there has been a catastrophic reduction of the glacierizedarea in the mountains of the Greater Caucasus, with the values reaching 0.69% peryear. Physical mechanisms accountable for such intense melting are investigated inthis study. The main trends in the temperature-moisture regime of the Caucasusand adjacent areas for the period 1982–2015 were recovered based on instrumentaldata and the ERA-Interim data reanalysis. It is demonstrated that there is statisticallysignificant warming for the summer season in the region as a whole. No statisticallysignificant changes were detected in the precipitation regime, despite theincrease in the integral moisture content of the atmosphere and in the potential convectiveenergy. The integral moisture content growth is compensated by theincrease in the moisture divergence. This happens due to the intensification oflarge-scale descending atmospheric motions. As a result, the seasonal and annualprecipitation amounts do not change significantly. Such effects are possibly theconsequence of the global process of “widening of the tropics.” This process ismost clearly manifested in the expansion of the Hadley cell and the northward shiftof its descending branch. This process can lead to an increased frequency of anticyclonesover the southern regions of Europe during the warm part of the year. This,in turn, leads to a negative cloud cover trend as well as an increase in the closelyrelated radiation balance. Apparently, this process is the cause of the intensivereduction of the glaciation area in the North Caucasus.
Добавил в систему: Торопов Павел Алексеевич

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Large-scale climatic factors driving glacier recession in the Greater Caucasus, 20th–21st centuryстатья

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