Reliability of NCEP/NCAR reanalysis data in the Himalayas/Tibetan Plateau  

作　　者：XIE Aihong REN Jiawen QIN Xiang KANG Shichang 

机构地区：[1]State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environment and Engineering Re-search Institute, CAS, Lanzhou 730000, China [2]Institute of Tibetan Plateau Research, CAS, Beijing 100085, China

出　　处：《Journal of Geographical Sciences》2007年第4期421-430,共10页地理学报（英文版）

基　　金：National Natural Science Foundation of China, No.40501015; No. 90411003; Innovation Program of CAS, No.KZCX3-SW-344; No.KZCX3-SW-354

摘　　要：Due to the difficult logistics in the extreme high elevation regions over the Himalayas and Tibetan Plateau, the observational meteorological data are very few. In 2003, an automatic weather station was deployed at the northeastern saddle of Mt. Nyainqentanglha （NQ） （30°24＇44.3″N, 90°34＇13.1″E, 5850 m a.s.l.）, the southern Tibetan Plateau. In 2005, another station was operated at the East Rongbuk GlacierCol （28°01 ＇0.95″N, 86°57＇48.4″E, 6523 m a.s.l.） of Mt. Qomolangma. Observational data from the two sites have been compared with the reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research （NCEP/NCAR）, reliability of NCEP/NCAR reanalysis data has been investigated in the Himalayas/Tibetan Plateau region. The reanalysis data can capture much of the synoptic-scale variability in temperature and pressure, although the reanalysis values are systematically lower than the observation. Furthermore, most of the variability magnitude is, to some degree, underestimated. In addition, the weather event extracted from the NCEP/NCAR reanalyzed pressure and temperature prominently appears one day ahead of the observational data on Mt. Qomolangma, while on Mt. NQ it occurs basically in the same day.Due to the difficult logistics in the extreme high elevation regions over the Himalayas and Tibetan Plateau, the observational meteorological data are very few. In 2003, an automatic weather station was deployed at the northeastern saddle of Mt. Nyainqentanglha （NQ） （30°24＇44.3″N, 90°34＇13.1″E, 5850 m a.s.l.）, the southern Tibetan Plateau. In 2005, another station was operated at the East Rongbuk GlacierCol （28°01 ＇0.95″N, 86°57＇48.4″E, 6523 m a.s.l.） of Mt. Qomolangma. Observational data from the two sites have been compared with the reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research （NCEP/NCAR）, reliability of NCEP/NCAR reanalysis data has been investigated in the Himalayas/Tibetan Plateau region. The reanalysis data can capture much of the synoptic-scale variability in temperature and pressure, although the reanalysis values are systematically lower than the observation. Furthermore, most of the variability magnitude is, to some degree, underestimated. In addition, the weather event extracted from the NCEP/NCAR reanalyzed pressure and temperature prominently appears one day ahead of the observational data on Mt. Qomolangma, while on Mt. NQ it occurs basically in the same day.

关 键 词：Mt. Qomolangma Mt. Nyainqentanglha NCEP/NCAR Himalayas-Tibetan Plateau 

分 类 号：P42[天文地球—大气科学及气象学]