WP和NAO对中国东南部冬季温度的协同影响

利用NCEP/NCAR和ERA-Interim再分析资料,通过多元线性回归等分析方法,研究了西太平洋遥相关型(Western Pacific teleconnection,WP)和北大西洋涛动(North Atlantic Oscillation,NAO)的不同配置对中国东南部冬季气温的影响.结果 表明:WP正位相年,...

Synergistic effects of WP and NAO on winter surface temperature in southeastern China

Based on the NCEP/NCAR and ERA-Interim reanalysis data,the multiple linear regression analysis is used to study impacts of different configurations of Western Pacific teleconnection (WP) and North Atlantic Oscillation (NAO) on winter surface temperature in southeastern China.Results show that in the positive phase year of WP,the middle and low latitudes Pacific Ocean is controlled by abnormal warm high,whose local effects make a warmer winter in southeastern China.In the positive phase year of NAO,the north and south teleconnection wave trains regulate the north and south branch troughs systems respectively,which synergistically make a colder winter around 30°N in southeastern China.Considering the interaction of the two teleconnection patterns,when WP and NAO are in the same phase,their opposite effects are partially offset,and the temperature change in southeastern China in winter is not significant.In positive WP phase and negative NAO phase,the synchronous heating effects make a warmer winter in southeastern China.In negative WP phase and positive NAO phase,the synchronous cooling effects make a colder winter in southeastern China.