中文摘要：

选择天山和祁连山区为典型区,利用台站降水数据验证以上两区多卫星降水数据（TRMM）精度的基础上,借助TRMM数据分析了所选山区年降水梯度效应,并探讨了天山及祁连山最大降水高度带。结果表明,多卫星降水数据在天山和祁连山区精度较高,天山及祁连山年降水量都明显受到海拔影响,降水随海拔升高而增加,但天山降水与海拔正相关关系最好,南、北和西坡相关系数分别为0.90、0.81和0.58,多年平均降水直减率分别为11.0mm/100 m、6.3 mm/100 m、7.4 mm/100 m,最大降水高度带则分别位于海拔2 200-3 500 m和3 200-3 700 m和3 000m左右;祁连山东、中、西段降水随海拔有增加趋势,但降水梯度效应在祁连山东段明显高于祁连山中西段地区,梯度效应由东向西呈现递减趋势,其最大降水带主要分布在东段4 000-4 500 m的高山带。

英文摘要：

The precipitation lapse rate（altitude effect of precipitation） and the zone of maximum precipitation in Tianshan and Qilian Mountains regions are studied using TRMM（Tropical Rainfall Measuring Mission） precipitation data.The results indicate that the annual TRMM precipitation compares well with the gauge observation over the two regions,the precipitation lapse rate and the zone of maximum precipitation can be quantified using the TRMM data.The annual precipitation in the Tianshan Mountain region is well correlated to the altitude over the two mountainous regions;the correlation coefficients are 0.90,0.81,and 0.58 on the Southern,Northern and Western slopes,respectively.The corresponding multi-year average of precipitation lapse rates are 11.0 mm/100 m,6.3 mm/100 m,and 7.4 mm/100 m,and the zones of maximum precipitation on the three slopes are located at altitudes of 2 200 to 3 500 m,3 200 to 3 700 m,and about 3 000 m,respectively.And in the Qilian Mountains region,the precipitation increase with the elevation,the effect of altitude on precipitation is more pronounced in the eastern part of the region compared to that of the western region.The precipitation lapse rate is 11.9 mm/100 m in the east,while,the zone of maximum precipitation is in the area with altitudes of 4 000 to 4 500 m.