中文摘要：

利用气象台站观测地表温度，比较和分析了ERA—Interim、NCEP／NCAR和NCEP／DOE再分析地表温度资料在青藏高原的适用性。结果表明：三种再分析资料都揭示了青藏高原地表温度的基本特征，并较好地描述了高原地表温度的季节变化和年际变化特征；但三种再分析资料都比观测地表温度明显偏低，且对地表温度的长期变化趋势估计不足。比较而言，ERA—Interim再分析地表温度产品在青藏高原的适用性最好，与观测地表温度的相关最显著，且能较好地反映高原地表温度的异常变化强度，可作为研究高原地表温度年际变化的代用资料；而NCEP／NCAR和NCEP／DOE再分析地表温度产品在青藏高原的适用性不佳，其适用时段和适用区域需要进一步考察。

英文摘要：

Based on the surface temperature observed by meteorological stations, this paper compares and analyzes the applicability of surface temperature from the ERA-Interim, NCEP/NCAR and NCEP/ DOE reanalysis data over the Tibetan Plateau. Results show that the three reanalysis products reveal the basic characteristics, the seasonal and interannual variations of surface temperature over the Tibetan Plateau, but they are all much colder than the observations and underestimate the long-term trend of sur- face temperature. Comparatively, the applicability of surface temperature from the ERA-Interim is the best, the correlation in surface temperature between the ERA-Interim and the observations is the most remarkable, and the surface temperature from ERA-Interim can better represent the abnormal variation of surface temperature, which can be used as the substitution data in studying interannual variation of surface temperature over the Tibetan Plateau. But the applicability of surface temperature from NCEP/ NCAR and NCEP/DOE reanalysis data are both low, and the applicable period and area should be in- vestigated further.