川渝地区夏季气象干旱差异及大气环流成因分析

何慧根, 张驰, 成青燕, 李永华, 甘薇薇, 金燕

Analysis on differences of characteristics and atmospheric circulation causes of meteorological drought during summer in Sichuan-Chongqing region

HE Huigen, ZHANG Chi, CHENG Qingyan, LI Yonghua, GAN Weiwei, JIN Yan

图7 四川干旱重年（a）、重庆干旱重年（b）及川渝干旱均重年（c）夏季500 hPa位势高度场（黑色等值线）及距平（填色）合成（单位：gpm） （蓝色线包围地区为四川和重庆，下同；粉色线为多年平均5 880 gpm线）

Fig.7 The composited 500 hPa geopotential height field (black contour lines) and its anomaly field (color shaded) in summer in years with severe drought in Sichuan (a), years with severe drought in Chongqing (b), and years with severe drought both in Sichuan and Chongqing (c) (Unit: gpm) (The area enclosed by the blue line represents Sichuan and Chongqing, the same as below; the pink lines represent the climate average 5 880 gpm line)