青藏高原地区上空NCEP/NCAR再分析温度和位势高度资料与观测资料的比较分析

Comparison of NCEP/NCAR Reanalysis Data and Radiosonde Data about Temperature and Geopotential Height of Upper Air over the Tibetan Plateau

利用青藏高原12个探空站资料及NCEP/NCAR再分析资料,对各标准等压面上的月平均温度和位势高度资料进行了比较,结果表明:NCEP/NCAR再分析资料能够客观地反映青藏高原上空温度和位势高度多年平均的气候特征;与实际探空资料相比,在年际变化中再分析资料的温度和位势高度也具有较高的可信度;但在长期趋势变化上,再分析资料在青藏高原对流层低层存在着明显虚假的变化趋势。总之,再分析温度和位势高度资料在青藏高原气候研究中有较高的参考价值,尤其是1979年后再分析资料的质量在平流层低层得到明显的改善。

The 32-year mean (1971-2002) NCEP/NCAR reanalysis monthly data are investigated by comparing with temperature and geopotential height data obtained from radiosonde reports of 12 stations over the Tibetan Plateau. The main conclusions are as follows: 1) Monthly temperature and geopotential height of the reanalysis data are almost consistent with the observation data in climatology, the reanalysis data can objectively represent the climatic characteristics of the Tibetan Plateau. 2) There are strong positive ...