夏季青藏高原及周边地区大气热源与川渝盆地高温日数年际变化的关系

黄小梅, 周长艳, 庞轶舒, 于浩慧, 甘薇薇

Relationship between atmospheric heat source over the Qinghai-Xizang Plateau and its surrounding area and annual variation of high temperature days in Summer in Sichuan-Chongqing Basin

HUANG Xiaomei, ZHOU Changyan, PANG Yishu, YU Haohui, GAN Weiwei

图4 1979－2022年川渝盆地夏季高温日数EOF第一模态时间系数与高原及周边大气热源在去掉年代际变化趋势前（a）、后（b）的相关系数场 （红色方框为计算高原热力指数选取的关键区，深、浅阴影分别表示达到95%、90%的置信水平）

Fig.4 The spatial distribution of the correlation coefficients between the time series of the first EOF mode of high temperature days in summer in Sichuan-Chongqing Basin from 1979 to 2022 and the atmospheric heat sources over the Qinghai-Xizang Plateau and its surrounding areas before (a) and after (b) removing the interdecadal variation trends (The red square frame represents the key regions selected for the calculation of the thermal index of Qinghai-Xizang Plateau, the dark and light shadows indicate the confidence level of 95% and 90%, respectively)