Journal of Mountain Science

, Volume 6, Issue 1, pp 56–65 | Cite as

Feasibility comparison of reanalysis data from NCEP-I and NCEP-II in the Himalayas

  • Aihong XieEmail author
  • Jiawen Ren
  • Xiang Qin
  • Shichang Kang


Mt. Everest is often referred to as the earth’s ‘third’ pole. As such it is relatively inaccessible and little is known about its meteorology. In 2005, an automatic weather station was operated at North Col (28°01′ 0.95″ N, 86°57′ 48.4″ E, 6523 m a.s.l.) of Mt. Everest. Based on the observational data, this paper compares the reanalysis data from NCEP/NCAR (hereafter NCEP-I) and NCEP-DOE AMIP-II (NCEPII), in order to understand which reanalysis data are more suitable for the high Himalayas with Mt. Everest region. When comparing with those from the other levels, pressure interpolated from 500 hPa level is closer to the observation and can capture more synoptic-scale variability, which may be due to the very complex topography around Mt. Everest and the intricately complicated orographic land-atmosphereocean interactions. The interpolation from both NCEP-I and NCEP-II daily minimum temperature and daily mean pressure can capture most synopticscale variability (r>0.82, n=83, p<0.001). However, there is difference between NCEP-I and NCEP-II reanalysis data because of different model parameterization. Comparing with the observation, the magnitude of variability was underestimated by 34.1 %, 28.5 % and 27.1 % for NCEP-I temperature and pressure, and NCEP-II pressure, respectively, while overestimated by 44.5 % for NCEP-II temperature. For weather events interpolated from the reanalyzed data, NCEP-I and NCEP-II show the same features that weather events interpolated from pressure appear at the same day as those from the observation, and some events occur one day ahead, while most weather events interpolated from NCEP-I and NCEP-II temperature happen one day ahead of those from the observation, which is much important for the study on meteorology and climate changes in the region, and is very valuable from the view of improving the safety of climbers who attempt to climb Mt. Everest.


Mt. Everest NCEP/NCAR (NCEP-I) NCEP-DOE AMIP-II (NCEP-II) daily minimum temperature (DMinT) daily mean pressure (DMeanP) High Himalayas 


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  1. A. P. Barros, G. Kim, E. Williams and S.W. Nesbitt, 2004. Probing Orographic Controls in the Himalayas during the Monsoon Using Satellite Imagery, Natural Hazards Earth System Science, 4: 29–51.Google Scholar
  2. Bertolani, L., M. Bollasina and G. Tartari, 2000: Recent Biennial Variability of Meteorological Features in the Eastern Highland Himalayas, Geophysical Research Letters, 27: 2185–2188.CrossRefGoogle Scholar
  3. Bollasina, M. and S. Benedict, 2004. The Role of the Himalayas and the Tibetan Plateau within the Asian Monsoon System, Bulletin of American Meteorology Society, 85(7): 1001–1004.0CrossRefGoogle Scholar
  4. Dell’Aquila, A., P. M. Ruti, S. Calmanti, and V. Lucarini. 2007. Southern Hemisphere Midlatitude Atmospheric Variability of the NCEP-NCAR and ECMWF Reanalyses, Journal ofGeophysical Research 112, D08106, doi: 10.1029 /2006JD007376.CrossRefGoogle Scholar
  5. Egger, J., S. Bajrachaya, U. Egger, R. Heinrich, J. Reuder, P. Shayka, H. Wendt, and V. Wirth, 2000. Diurnal Winds in the Himalayan Kali Gandaki Valley. Part I: Observations. Monthly Weather Review, 128:1106–1122.CrossRefGoogle Scholar
  6. Harold E. Brooks, Aaron R. Anderson, Kathrin Riemann, Irina Ebbers, Heather Flachs, 2007. Climatological Aspects of convective Parameters from the NCAR/NCEP Reanalysis, Atmospheric Research, 83(2): 294–305.CrossRefGoogle Scholar
  7. Hou Shugui, Qin Dahe, 2002. The Effect of Postdepositional Process on the Chemical Profiles of Snow Pits in the Percolation Zone, Cold Regions Science and Technology, 34: 111–116.CrossRefGoogle Scholar
  8. Huey, R. B., and X. Eguskitza, 2001. Limits to Human Performance: Elevated Risks on High Mountains, J. Exp. Biol., 204: 3115–3119.Google Scholar
  9. Ian Simmonds and Kevin Keay, 2000. Mean Southern Hemisphere Extratropical Cyclone Behavior in the 40-Year NCEP-NCAR Reanalysis, Journal of Climate, 13: 873–885.CrossRefGoogle Scholar
  10. Kalnay, E., E, M Kanamitsu and R Kistl, 1996. The NCEP/NCAR 40-year Reanalysis Project, Bulletin of American Meteorology Society, 77: 437–471.CrossRefGoogle Scholar
  11. Kanamitsu, M., W. Ebisuzaki, J. Woollen, S.-K. Yang, J. Hnilo, M. Fiorino, and J. Potter, 2002. NCEP-DOE AMIP-II Reanalysis (R-2). Bulletin of American Meteorology Society, 83: 1631–1643.CrossRefGoogle Scholar
  12. Kang, Shichang, Mayewski, P.A., Qin Dahe, Yan Yuping, Hou Shugui, Zhang Dongqi, Ren Jiawen and K. Kruetz, 2002. Glaciochemical Records from a Mt. Everest Ice Core: Relationship to Atmospheric Circulation over Asia, Atmosphere Environment, 36(21): 3351–3361.CrossRefGoogle Scholar
  13. Kistler R, E Kalny and W Collins, 2001. The NCEP-NCAR 50-year reanalysis; Monthly Means CD-ROM and Documentation, Bulletin of American Meteorology Society, 82(2): 247–267.CrossRefGoogle Scholar
  14. Masao Kanamttsu, Wesley Ebisuzaki, Jack Woollen, Shikeng Yang, J. J. Hnilo, M. Fiorino and G. L. Potter, 2002. NCEP-DOE AMIP-II Reanalysis (R-2), Bulletin of American Meteorology Society, DOI: 10.1175/BAMS-83-11-1631, 1631–1643.Google Scholar
  15. Massimo Bollasina and Sam Benedict, 2004. The Role of the Himalayas and the Tibetan Plateau within the Asian Monsoon System, Bulletin of American Meteorology Society, 85(7): 1001–1004.CrossRefGoogle Scholar
  16. Maximiliano Viale and Adriana E. Fernandez, 2006. Comparison of the Reanalysis “ERA-40” and the Reanalysis “NCEP/NCAR” with the radiosondes over Argentina and Chile, Proceedings of 8 ICSHMO: 63–69.Google Scholar
  17. Moore, G. W. K., and J. L. Semple, 2004. High Himalayan meteorology: Weather at the South Col of Mount Everest, Geophysical Research Letters, 31, L18109, doi: 10.1029/2004GL020621.CrossRefGoogle Scholar
  18. Qin Dahe, Hou Shugui, Zhang Dongqi, Ren Jiawen, Kang Shichang, Paul A. Mayewski and C. P. Wake, 2002. Preliminary Results from the Chemical Records of an 80.4m Ice Core Recovered from East Rongbuk Glacier, Everest (Mount Everest). Annual Glaciology, 35: 278–284.CrossRefGoogle Scholar
  19. Qin Dahe, Mayewski, P.A., Wake, C.P., Kang Shichang, Ren Jiawen, Hou Shugui, Yao Tandong, Yang Qinzhao, et al. 2000. Evidence for Recent Climate Change from Ice Cores in the Central Himalayas, Annual Glaciology, 31: 153–158.CrossRefGoogle Scholar
  20. Ren Jiawen, Jing Zhefan, Pu Jianchen and Qin Xiang, 2006. Glacier Variations and Climate Change in the Central Himalayas over the Past Few Decades. Annual Glaciology, 43: 218–222.CrossRefGoogle Scholar
  21. Ren Jiawen, Qin Dahe, Kang Shichang, Hou Shugui, Pu Jianchen and Jing Zhefan, 2004. Glacier Variations and Climate Warming and Drying in the Central Himalayas, Chinese Science Bulliten, 49: 65–69.Google Scholar
  22. Simmonds, I. and K. Keay., 2000. Mean Southern Hemisphere Extratropical Cyclone Behavior in the 40-year NECP-NCAR Reanalysis. Journal of Climate, 13: 873–885.CrossRefGoogle Scholar
  23. Thompson, L.G., Yao, T. and Mosley-Thompson, 2000. A High- Resolution Millennial Record of the South Asian Monsoon from Himalayan Ice Cores. Science, 289: 1916–1919.CrossRefGoogle Scholar
  24. Tibetan scientific expedition team from Chinese Academy of Sciences, 1975a. Report on Scientific Expedition to Mt. Qomolangma Region: 1966–1968, Meteorology and Radiation. Beijing, China, Science Press, (In Chinese).Google Scholar
  25. Tibetan scientific expedition team from Chinese Academy of Sciences, 1975b. Report on Scientific Expedition to Mt. Qomolangma Region: 1966–1968, Physical Geography. Beijing, China, Science Press, (In Chinese).Google Scholar
  26. Venables, S., 2003. Everest Summit of Achievement, R. Geogr. Soc., London, 252.Google Scholar
  27. West, J. B., 1999. Barometric Pressures on Mt. Everest: New Data and Physiological Significance, Journal of Applied Physiology,86: 1062-1066.CrossRefGoogle Scholar
  28. Xie Aihong, Ren Jiawen, Qin Xiang and Jiang Youyan, 2006. Meteorological Features at 6523 m of Mt. Qomolangma (Everest) between 1 May and 22 July 2005, Journal of Mountain Science, 3(3): 181–191.CrossRefGoogle Scholar
  29. Xie Jiping, Zhu Jiang, Xu Li, Guo Pinwen, 2006. Evaluation of Mid-Depth Currents of NCEP Reanalysis Data in the Tropical Pacific Using ARGO Float Position Information, Advance of Atmosphere Science, 22(5): 677–684Google Scholar
  30. Zhao Tianbao and Fu Congbin, 2006. Comparison of Products from ERA-40, NCEP-2, and CRU with Station Data for Summer Precipitation over China, Advance of Atmosphere Science, 23(4): 593–604CrossRefGoogle Scholar

Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Aihong Xie
    • 1
    Email author
  • Jiawen Ren
    • 1
  • Xiang Qin
    • 1
  • Shichang Kang
    • 1
    • 2
  1. 1.State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environment and Engineering Research InstituteChinese Academy of SciencesLanzhouChina
  2. 2.Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijingChina

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