Quantifying the parameters that control turbulent land–atmosphere energy exchange over the Dunhuang Gobi land surface, northwest China
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Land–atmosphere interactions in the northwest arid and semi-arid areas of China are important because of their influence on energy exchange at both regional and global scales. In this paper, regular meteorological observations, as well as flux eddy covariance methods, are used to measure land–atmosphere energy exchange. Experiments were conducted over the Dunhuang Gobi, a typical arid region of northwest China, during the summer of 2008. Surface fluxes were measured directly using an eddy-correlation system, while the vertical gradients of wind and temperature were also observed at four levels using a meteorological tower. Based on the observation data, the integral mean of surface albedo over the Gobi was found to be 0.238. In addition, the mean values of momentum, heat roughness lengths, and soil thermal conductivity were, 0.045, 0.005 cm, 0.199 and 0.201 W (m K)−1, respectively. The Monin–Obukhov similarity functions for momentum and heat were analyzed and new empirical formulae were developed.
KeywordsAlbedo Roughness Similarity functions Gobi
This research was supported by the National Natural Science Foundation of China (41275011, 41375001, 91337215), the Scientific Research Foundation of CUIT (KYTZ201324), and China Special Fund for Meteorological Research in the Public Interest GYHY201406015).
- He Y, Zhang H, Liu M, Kang L (2009) A Study on determining aerodynamic parameters over Gobi Desert surface. Acta Sci Nat Univ Pekin 3:439–443Google Scholar
- Hu Y, Qi Y, Yang X (1990) Preliminary analyses about characteristics of microclimate and heat energy budget in hexi Gobi. Plateau Meteorol 9(2):113–119Google Scholar
- Liu H, Zhang Y, Liu S, Jiang H, Sheng L, Williams Q (2009) Eddy covariance measurements of surface energy budget and evaporation in a cool season over southern open water in Mississippi. J Geophys Res 114:112–131Google Scholar
- Monin AS, Obukhov AM (1959) Basic laws of turbulent mixing in the surface layer of the atmosphere. Contrib Geophys Inst Acad Sci 24(151):163–187Google Scholar
- Wang C, Wei ZG, Li ZC (2010) The variation characteristics of wind in Dunhuang Gobi surface. Plateau Meteorol 30(2):299–308Google Scholar
- Zhang Q, Wei GA (2004) Experimental study on bulk drag and transfer coefficients over Gobi. Plateau Meteorol 23(003):305–312Google Scholar
- Zhang Q, Huang RH, Wang S, Wei GA, Cao XY, Hou XH, XH SH, Hu ZY, Ma YM, Wei ZG, Nie YJ, Gao HC, Gao HM, Yan YP (2005) NWC-ALIEX and its research advances. Adv Earth Sci 20(4):427–441Google Scholar