TELECONNECTION BETWEEN ARCTIC SEA ICE AND CP EL NI?O EVENTS
The teleconnection between high and low latitudes in the case of between Arctic sea ice and central Pacific(CP)El Nino phenomenon was studied.Based on the latest observation and reanalysis data,the phenomena that the loss of Arctic sea ice in cold seasons can lead to CP El Nino in the following year,and the corresponding ocean-air coupling mechanism in the subtropical North Pacific were clarified.Results show that Arctic sea ice anomaly causes the abnormal pressure in the North Pacific Ocean in late spring and early summer,which leads to the increase of SST(sea surface temperature)in the tropical Pacific Ocean and the abnormal westerly wind.Eventually,CP El Nino occurs in the winter.Based on previous research ideas on the summer of CP El Nino development years,in the cold season of CP El Nino development years,the significant decrease of sea ice in the Canadian basin has effect on low Arctic sea ice range anomaly,but the sea ice is abnormally increased in the northern Barents Sea due to the effect of wind field.Besides,it was revealed that in the CP El Nino decline years,the Arctic sea ice loss is significant in the warm season,the increase of net sea surface heat flux,the dynamic effects of sea surface wind,and sea ice motion contribute to the sea ice loss in the Laptev Sea.This study advanced the theoretical improvement of the remote correlation between Arctic sea ice and CP El Nino.
万方数据
维普
