摘要
By using a three-level atmospheric general circulation model (AGCM),we have completed several numerical experiments to study the impacts of sea surface temperature anomaly (SSTA) and antarctic ice cover anomaly (AICA) during 1981—1983 on climate variability.The results show that during the El Nino period of 1982—1983 the impact of SSTA overrides that of AICA.SSTA mainly affects equatorial zonal circulation and produces PNA wave train,and SE-NW wave train in East Asia to influence the weather of China.AICA produces west-east anomalous vortex streets in the middle latitudes of both hemispheres and affects the intensity of the polar vortex of Southern Hemisphere.
By using a three-level atmospheric general circulation model (AGCM),we have completed several numerical experiments to study the impacts of sea surface temperature anomaly (SSTA) and antarctic ice cover anomaly (AICA) during 1981—1983 on climate variability.The results show that during the El Nino period of 1982—1983 the impact of SSTA overrides that of AICA.SSTA mainly affects equatorial zonal circulation and produces PNA wave train,and SE-NW wave train in East Asia to influence the weather of China.AICA produces west-east anomalous vortex streets in the middle latitudes of both hemispheres and affects the intensity of the polar vortex of Southern Hemisphere.
基金
This work is supported by the 8th 5-year scientific key program"the interaction and influence of Antarctic and global climate"(85-905-02)of State Science and Technology Commission.
