Changes in cyclone activity and precipitation in the extratropical latitudes of the Northern Hemisphere in recent decades according to ERA5 reanalysis data
M.G. Akperov1, I.I. Mokhov1,2
1A.M. Obukhov Institute of Atmospheric Physics Russian Academy of Sciences, Moscow, Russia
2Lomonosov Moscow State University, Moscow, Russia
Keywords: atmospheric cyclone, precipitation, Northern Hemisphere, reanalysis, trend
Abstract
We quantified the seasonal/regional patterns and changes in cyclone activity in the atmosphere of the Northern Hemisphere and determined the contribution of extratropical cyclones to the formation of corresponding patterns and precipitation changes. It is established that the contribution of extratropical cyclones to the total amount of precipitation exceeds 60% on the whole; for regions with a high cyclone occurrence, it attains 75% in winter and 65% in summer. The strongest contribution is related to intense cyclones: 60% in winter and 35% in summer.
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