A Comparison of the Characteristics of Extreme Drought During the Late 20th and Early 21st Centuries Over Eurasia and North America

Abstract The atmospheric general circulation character during summer droughts over Eastern Europe / Western Russia and North America from 1970 – 2020 is examined here. A criterion to examine drought events encompassed the season was used determine which years were driest using precipitation, evaporation, areal coverage. relationship between Dzerzeevsky climatic classification scheme, blocking, teleconnections, information entropy are study dynamics. National Centers for Environmental Prediction (NCEP) re-analyses data set archived at Center Atmospheric Research (NCAR) in Boulder, CO, USA synoptic calculate dynamic quantities these dry events. results demonstrate that extreme associated with a long warm period of weather development moderate ridge central driven by surface processes. Extreme occurrence prolonged blocking episodes as well