Based on the NCEP/NCAR re-analysis climate data, the advection and convergence of atmospheric water vapor transport over the northwest China are analyzed.The results are as follow.

• 摘要分析了中国西北地区上空的水汽汇聚过程-平流输送与辐合输送，为西北地区降水过程数值模拟的参数化提供依据。