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青藏高原地表能量影响高原生态环境的演变、水资源利用及地表工程的稳定性。以青藏高原北麓河气象站2012年10月~2013年10月气象资料和浅层地热流为基础,分析了北麓河地区地表能量收支和平衡特征。结果表明:1)北麓河多年冻土区能量平衡各分量冬季较小,夏季较大,净辐射、潜热、感热和地表土壤热通量年平均分别为72W/m~2、24.6W/m~2、65.5W/m~2和-18.3W/m~2;2)月平均感热大于潜热,年平均地表土壤热通量为负值,天然地表多年冻土处于相对稳定的状态,与五道梁、西大滩和唐古拉地区有明显区别;3)夏季降雨作用时间短暂,潜热影响有限,但降雨入渗引起的液态水分对流传热、水汽对流和扩散潜热对地表能量收支分析和土壤内部水热动态变化的影响不可忽略。
The Surface Energy of the Tibetan Plateau Affects the Evolution of Plateau Ecological Environment, Utilization of Water Resources and the Stability of Surface Engineering. Based on the meteorological data and the shallow geothermal flow from Beiluhe Station of the Qinghai-Tibet Plateau from October 2012 to October 2013, the characteristics of surface energy budget and balance in Beiluhe area are analyzed. The results show that: 1) The components of energy balance in Beiluhe permafrost region are smaller in winter and larger in summer, and the average annual net heat flux, latent heat, sensible heat and surface soil heat flux are 72W / m ~ 2,24.6W / m ~ 2 and -18.3W / m ~ 2, respectively; 2) the monthly mean sensible heat is greater than the latent heat, the annual mean surface soil heat flux is negative, and the natural surface permafrost is in a relatively stable state, Which is obviously different from Wudaoliang, Xidatan and Tanggula regions; 3) Short duration of summer rainfall and limited latent heat, but the analysis of surface energy budget for convective heat, water vapor convection and diffusion latent heat caused by rainfall infiltration And soil hydrothermal internal changes can not be neglected.