谢坤, 任雪娟. 华北夏季大气水汽输送特征及其与夏季旱涝的关系[J]. 气象科学, 2008, 28(5): 508-514.XIE Kun, REN Xuejuan. Climatological characteristics of atmospheric water vapor transport and its relation with rainfall over North China in summer. Meteorological Science, 2008, 28(5): 508-514. (in Chinese)