NCEP/NCAR 再分析资料在珠穆朗玛峰 —念青唐古拉山脉气象研究中的可信性

doi:10.11821/xb200703004

Abstract

Abstract:

Mount Qomolangma , the highest peak on Earth, is often referred to as the third pole of the globe. The Nyainqentanglha is one of the closest remote parts of mountain range north to the Himalayas. As such the two places are relatively inaccessible on the southern Tibetan Plateau and little is known about their meteorology. In 2003, an auto weather station was deployed at the north col of western Nyainqentanglha (WNQ) range (30^o24'44.3"N, 90^o34'13.1"E, 5850 m a.s.l.). In 2005, the other station was operated at the north col of Mount Qomolangma (28^o01'0.95"N, 86^o57'48.4"E, 6523 m a.s.l.). We believe that these represent the high elevation at which continuous weather data have never been collected and thus are valuable datasets with which to investigate the meteorology of the high altitude southern Tibetan Plateau. In this paper, we compare the observations with the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis, in order to understand the reliability of NCEP/NCAR reanalysis data on Mount Qomolangma and Nyainqentanglha Range. We find that the reanalysis captures much of the synoptic-scale variability in temperature and pressure, although the reanalysis values are systematically lower than the observations. Furthermore, most of the variability magnitude is, to some extent, underestimated. In addition, the weather event extracted from the NCEP/NCAR reanalyzed pressure and temperature prominently appears one-day lead to that from the observational data on Mount Qomolangma , while on the WNQ range it frequently occurs on the same day and there is no obvious lead or lag. Influenced by the same atmosphere circulation, Mount Qomolangma and the WNQ range have close correlations both in the observational data and reanalyzed data.

Key words: Mount Qomolangma, Nyainqentanglha Range, NCEP/NCAR, Himalayas-Tibetan Plateau

XIE Aihong, QIN Dahe, REN Jiawen, QIN Xiang, KANG Shichang, JIANG Youyan. Reliability of NCEP/NCAR Reanalysis Data on Mount Qomolangma and Western Nyainqentanglha Range[J].Acta Geographica Sinica, 2007, 62(3): 268-278.

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Reliability of NCEP/NCAR Reanalysis Data on Mount Qomolangma and Western Nyainqentanglha Range

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[1]	DUAN Jianping, REN Jiawen, QIN Xiang, LI Yuefang. Heavy Metals Concentrations and Seasonal Variations in Snow of Mount Qomolangma Region [J]. Acta Geographica Sinica, 2007, 62(1): 22-29.
[2]	ZHANG Qiong, QIAN Yong fu . Monthly Mean Surface Albedo Estimated From NCEP/NCAR Reanalysis Radiation Data [J]. Acta Geographica Sinica, 1999, 54(4): 309-317.