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›› 2005, Vol. 22 ›› Issue (3): 386-393.DOI: 10.7523/j.issn.2095-6134.2005.3.019

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Evaluating the Measurement Results of Eddy Covariance System at Two Heights Using Two Methods

SONG Xia1,2, LIU Yun-Fen1, XU Xiao-Feng1,2   

  1. 1. Institute of Geographical Sciences and Natural Resources Research, Chinese Ac ademy of Sciences, Beijing 100101, China;
    2. Graduate School, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2004-01-06 Revised:2004-05-26 Online:2005-05-15
  • Supported by:

    supported by the grant of the Knowledge Innovation Programof Chinese Academy of Sciences (KZCX12SW201) and the Innovation Project of IGSNRR, CAS(CX10G2E01203205)

Abstract:

The energy balance closure and standard deviations for vertical wind velocity and scalar quantities were applied to test the liability of measurement results of eddy covariance system at two heights, which provided the foundation for decision of the measurement height. The results showed that 23mwas better than 39m in measurement using the standard deviations for vertical velocity and scalar quantities; however, energy balance closure analysis showed that 23m was better than 39m in winter, while 39m better than 23m in spring. Totally, 23m is better than 39m in flux measurements of scalar gases and heat.

Key words: eddy covariance, Monin2Obukhov similarity theory, energy balance, measurement height

CLC Number: