Plateau Meteorology

Plateau Meteorology >

2014 , Vol. 33 >Issue 3: 626 - 636

DOI: https://doi.org/10.7522/j.issn.1000-0534.2013.00199

Influence of Surface Roughness on Surface-Air Fluxes in Alpine Meadow over the Northern Qinghai-Xizang Plateau

  • YANG Yaoxian ,
  • LI Maoshan ,
  • HU Zeyong ,
  • Renqing Muchi ,
  • Gongjue Dunzhu ,
  • WANG Yu ,
  • HUANG Rong ,
  • SUN Genhou
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  • Key Laboratory for Land Process and Climate Change in Cold and Arid Regions, Cold and Arid Region Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Nagri Meteorological Bureau, Nagri 859000, China;4. Nagqu Meteorological Bureau, Nagqu 852000, China

Received date: 2013-06-08

  Online published: 2014-06-28

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Abstract

Using turbulent data and AWS data during observational period in 2012 at Nagqu Station of Plateau Climate and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences. Through an independent method to determine aerodynamic roughness and two schemes for thermal roughness and excess resistance to get their dynamic change laws, the result shows that the aerodynamic roughness has a dynamic change on the particular time scale(monthly-seasonal). However, the thermal roughness has not only a seasonal change, but also it has different diurnal changes on the period of pre-monsoon, monsoon season and post-monsoon. Then, combing CoLM and coupling the surface parameters into CoLM, the control and sensitive numerical model were conducted. The result shows that the change of aerodynamic roughness and improvement of parameterization scheme for thermal roughness, evaluates modeling property, which makes the simulated surface fluxes closer to the observed surface fluxes.

Key words： Northern Qinghai-Xiz; Aerodynamic roughnes; Thermal roughness; Excess resistance; Surface-air fluxes

Cite this article

YANG Yaoxian , LI Maoshan , HU Zeyong , Renqing Muchi , Gongjue Dunzhu , WANG Yu , HUANG Rong , SUN Genhou . Influence of Surface Roughness on Surface-Air Fluxes in Alpine Meadow over the Northern Qinghai-Xizang Plateau[J]. Plateau Meteorology, 2014 , 33(3) : 626 -636 . DOI: 10.7522/j.issn.1000-0534.2013.00199

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