中文摘要：

评估多源水汽再分析资料在青藏高原的适用性,可为高原水汽分布及输送特征研究提供数据参考,并有利于提高高原地区气候变化研究结果的可靠性。以探空观测资料（简称＂观测资料＂）为参照标准,对比分析JRA-25（J25）、JRA-55（J55）和ERA-interim（ERA）等再分析水汽资料在高原的适用性。结果表明：3种再分析资料均能揭示高原比湿的时空变化特征,但再分析资料与观测资料比湿偏差存在明显的季节和区域差异。水平方向上,J25与观测资料比湿均方根误差（RMSE）及相对偏差（PIC）总体较小,J55和ERA夏季及年平均比湿RMSE和PIC明显偏大,冬季较小。垂直方向上,与观测资料比湿垂直廓线相比,J25夏、冬季及年平均比湿垂直廓线一致性最好;J55和ERA比湿垂直廓线冬季一致性较好,夏季偏差较大,特别是高原主体及东南部站点偏差尤为显著。再分析资料与观测资料各层比湿RMSE低层大,高层小,且J25的RMSE最小。与观测资料相比,J25比湿数值小幅偏高,J55和ERA则整体偏低,且偏差较大。J55和ERA再分析资料比湿存在较大偏差的原因及其在我国其他区域的适用性还有待进一步检验。

英文摘要：

It can provide the reference for studying water vapor distribution and transport to evaluate the applicability of reanalysis data of multi-source water over the Tibetan Plateau. In this study,the radiosonde data were taken as the standard,the applicability of JRA-25（ J25）,JRA-55（ J55） and ERA-interim（ ERA） over the Tibetan Plateau was compared. The results showed that three kinds of reanalysis data could be used to reveal the temporal and spatial variation characteristics of specific humidity（ SP） over the plateau,but there were the seasonal and regional obvious differences between the observed and reanalysis data. Horizontally,the average root of mean square error（ RMSE） and the average relative deviation（ PIC） of J25 SP were lower compared with the observed data,the summer and annual average SP RMSE and PIC of J55 and ERA were significant,but the winter ones were lower. Vertically,compared with the vertical profiles of observed data,the warm season,cold season and annual average SP profiles of J25 were more coincident,the cold season average SP profiles of J55 and ERA were better,the warm season ones were significant,and the deviations in the main body and the southeast part of the plateau were particularly notable. The values of SP RMSE between the reanalysis and observed data were high in low-layer but low in high-layer,and the J25 RMSE was the lowest. The values of J25 SP were slightly higher than the observed ones,J55 and ERA SP were lower than the observed data,and the deviations were high. In summary,further examinations are needed to reveal the causes resulting in the high deviations between J55,ERA and observations as well as their applicability in other areas in China.