A Heat Budget Analysis of the Polar Troposphere in and around Alaska during the Abnormal Winter of 1988/89

摘要: Abstract In this study, we carried out a quantitative heat budget analysis of the polar troposphere in and around Alaska for winter 1988/89. The was characterized by drastic temperature variations. surface minimum temperatures interior were lower than −40°C during two weeks late January. This cold period followed extremely warm weather February, especially northern Alaska. results three-month average (December to February) show that energy continental air mass is maintained balance advection, adiabatic warming, radiative cooling. long-term variation shows severe January caused an anomalous reduction advection sensible heat. abnormally February enhanced associated with blocking formation over North Pacific. We find strong a...