1 INTRODUCTIONAs confirmed by many studies, sea surface pressure is of interannual variations in subtropical Southern Hemisphere, which is defined as the Southern-hemisphere Annual Mode （SAM）. It is in fact a seesaw...1 INTRODUCTIONAs confirmed by many studies, sea surface pressure is of interannual variations in subtropical Southern Hemisphere, which is defined as the Southern-hemisphere Annual Mode （SAM）. It is in fact a seesaw effect of sea surface pressure symmetric longitudinally between the South Pole region and austral middle latitudes. SAM is in fact a correction to the Antarctic Atmospheric Oscillation （AAO）. At present, more attention is paid to the structure of SAM and its influence on the climate in mid- and higherlatitudes of SH than to the links between SAM and anomalies of boreal general circulation and climate. This work focuses on the relation among SAM in boreal spring （April - May）, Mei-yu （sustaining rains） in the middle and lower reaches of the Yangtze River and East Asian monsoon.展开更多
基金"Research on Subtropical Monsoon and Development of Relevant Forecasting Techniques"from Shanghai Meteorological Bureau
文摘1 INTRODUCTIONAs confirmed by many studies, sea surface pressure is of interannual variations in subtropical Southern Hemisphere, which is defined as the Southern-hemisphere Annual Mode （SAM）. It is in fact a seesaw effect of sea surface pressure symmetric longitudinally between the South Pole region and austral middle latitudes. SAM is in fact a correction to the Antarctic Atmospheric Oscillation （AAO）. At present, more attention is paid to the structure of SAM and its influence on the climate in mid- and higherlatitudes of SH than to the links between SAM and anomalies of boreal general circulation and climate. This work focuses on the relation among SAM in boreal spring （April - May）, Mei-yu （sustaining rains） in the middle and lower reaches of the Yangtze River and East Asian monsoon.
