It is indicated that the variation of deuterium excess is accordant with that of the relative humidity over the western Arabian Sea,which suggests that the vapor for monsoon precipitation in New Delhi originates mainly from the western Arabian Sea.

• 结合西阿拉伯海风速和印度西北地区季风降水量资料分析结果；认为西阿拉伯海是新德里季风水汽的主要来源.