Journal of Geographical Sciences ›› 2007, Vol. 17 ›› Issue (4): 421-430.doi: 10.1007/s11442-007-0421-2

• Climate and Environmental Change • Previous Articles     Next Articles

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

XIE Aihong1, REN Jiawen1, QIN Xiang1, KANG Shichang1,2   

  1. 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
  • Received:2007-06-26 Revised:2007-08-20 Online:2007-12-25 Published:2007-12-25
  • Supported by:

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

Abstract:

Due to the difficult logistics in the extreme high elevation regions over the Himala-yas 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 Glacier Col (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 com-pared with the reanalysis data from the National Centers for Environmental Predic-tion/National Center for Atmospheric Research (NCEP/NCAR), reliability of NCEP/NCAR reanalysis data has been investigated in the Himalayas/Tibetan Plateau region. The reanaly-sis data can capture much of the synoptic-scale variability in temperature and pressure, al-though 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.

Key words: Mt. Qomolangma, Mt. Nyainqentanglha, NCEP/NCAR, Himalayas-Tibetan Plateau