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2 2025年春季海平面气压平均场（黑色等值线）及其距平（填色）（a，单位：hPa），纬向风-垂直速度合成（矢量，单位：m·s-1）及垂直速度（填色，单位：10-2 Pa·s-1）距平场（b）

Fig. 2 Mean sea level pressure (black contours) and its anomalies (color shaded) (a, Unit: hPa), anomaly fields of composite zonal wind-vertical velocity (vectors, Unit: m·s-1) and vertical velocity (the color shaded, Unit: 10-2 Pa·s-1) (b) in spring 2025