长江流域非典型少雨型主汛期环流特征及其影响机制分析

王海燕, 王孝慈, 张灵, 周耘逸, 孟英杰

Analysis of circulation characteristics and influencing mechanisms of atypical below-normal precipitation type during main flood season over the Yangtze River Basin

WANG Haiyan, WANG Xiaoci, ZHANG Ling, Zhou Yunyi, MENG Yingjie

图3 1990年1月—2025年7月逐月PDO指数及弱拉尼娜事件当年8月至次年7月Ni?o3.4、IOBW、TNA海温距平演变

Fig.3 Monthly PDO index from January 1990 to July 2025， and evolution of Ni?o3.4， IOBW， and TNA sea temperature anomalies from August of the weak La Ni?a event year to July of the subsequent year