Decadal variability of extreme high temperature in mid- and high-latitude Asia and its associated North Atlantic air–sea interaction

Abstract The decadal variability of extreme high temperature (EHT) in the mid and highlatitudes continental Asia (MHLCA) associated mechanisms were investigated. Observational analysis indicated that, after removing global warming, first leading mode EHT events showed a meridional dipole pattern had significant variability. During periods 1980–1994 2012–2019 (1995–2011), more frequent stronger (less weaker) western-central Siberia than normal, whereas they less weaker (more stronger) wide area to south Lake Baikal. Further CESM (Community Earth System Model) results based suggested that change air–sea interaction North Atlantic play an important role shaping MHLCA. On timescales, negative–positive–negative sea surface (SST) anomalies their coupled positive Oscillation can trigger wave activity flux cause anticyclonic–cyclonic teleconnection train troposphere over latitudes Eurasian continent. As result, anomalous high-pressure center is evident Siberia, thereby reducing total cloud cover causing solar heating. Thus, become stronger. contrary, for areas Baikal, are weakened by corresponding cyclonic circulation anomalies. Additionally, CAM5 Atmosphere Model version 5) experiments driving tripole SST abovementioned processes.