NOTES AND CORRESPONDENCE Surface Energy-Balance Closure in a Gully Region of the Loess Plateau at SACOL on Eastern Edge of Tibetan Plateau

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• 作者：Ping YUEYaohui LIQiang ZHANGLiang ZHANG
• 会议时间：2014-09-10
• 作者单位：Ping YUE(Key Laboratory of Arid Climatic Change and Reducing Deserter of Gansu Provcince,Institute of Arid Meteorology,China Meteorological Administration,Lanzhou,730020,China;Zhangye National Climatological Observatory,Zhangye,734000,China)Yaohui LI,Qiang ZHANG,Liang ZHANG(Key Laboratory of Arid Climatic Change and Reducing Deserter of Gansu Province,Institute of Arid Meteorology,China Meteorological Administration,Lanzhou,730020,China)
• 母体文献：第八届全国优秀青年气象科技工作者学术研讨会论文集
• 会议名称：第八届全国优秀青年气象科技工作者学术研讨会
• 会议地点：江苏宜兴
• 主办单位：中国气象学会
• 语种：chi

摘要

Surface energy-balance closure in a typical gully region of the Loess Plateau on the eastern edge of Qinghai Xizang Plateau were studied based on the turbulence and radiation data observed at the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL) in a period of 6 consecutive sunny days for each month from June to August 2008.The results show that the sensible heat flux considering the vertical advection item of energy transport to the energy budget equation (Hcc + Hmc) in the gully region on summer sunny days ac counted for 39.4% of net radiation, and the surface soil heat flux considering the heat storage term from the sur face to the flux-plate (G + △G) for 29.6%, and the latent heat flux (LE) account for 26.5%, after all corrections.The closure rate of surface energy for the typical environment of the Loess Plateau reached 93.2% and was higher during the day than at night.Consideration of soil heat storage (△G) and the vertical advection effect (Hmc) sig nificantly improved the surface energy closure rate.It is seen that in the typical semi-arid Loess Plateau region,even in the rainy season, sensible heat is still dominant over various components of surface energy expenditure.