影响北印度洋热带气旋生成环境因子的月际变化特征
柳龙生, 张新忠, 许映龙

Monthly variation characteristics of environmental factors affecting tropical cyclone genesis over the North Indian Ocean
LIU Longsheng, ZHANG Xingzhong, XU Yinglong
图6 1979—2018年北印度洋月平均600 hPa相对湿度(单位:%)
Fig.6 The monthly average relative humidity at 600 hPa over the North Indian Ocean from 1979 to 2018 (Unit: %)