学术
摘 要:
利用青藏高原唐古拉地区2005年涡动系统和10m气象塔数据资料，计算分析了该地区地表能量收支状况．结果表明：感热与潜热均有明显的季节变化特征，感热春季较大，夏季有下降趋势；潜热夏秋季节较大，冬春季节较小；净辐射在冬春季节主要转化为感热，夏秋季节转化为潜热，这些主要受季风、活动层冻、融过程及净辐射变化的影响．Bowen比夏秋季节平均为0．7，冬春季节平均为3．4，变化范围为-1．0～17．9．另外，研究显示降雨对感热、潜热通量影响较大．[著者文摘]
文章出处:
《冰川冻土》-2008年30卷1期 -119-124页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-0240（2008）01-0119-06
Surface Energy Budget in the Tanggula Region on the Tibetan Plateau, 2005
YAO Ji-min, ZHAO Lin, DING Yong-jian, GU Liang-lei, QIAO Yong-ping （Cryosphere Research Station on Qinghai-Xizang Plateau, State Key Laboratory of Cryospheric Science, CAREERI, CAS, Lanzhou Gansu 730000, China）
Abstract:
The sensible and latent heat fluxes in the Tanggula region in 2005 were calculated using the turbulent flux data observed from an eddy covariance system and. a meteorology gradient tower, 10 meter in height. The results show that the sensible heat flux was higher in spring and had a heat sink in summer due to the heat consumed in the thawing of the active layer. The latent heat flux was much higher in summer owing to the higher soil moisture content, resulting from the thawing of the active layer and more precipitation during the summer monsoon season. In winter and spring, the net radiation transformed mainly into the sensible heat flux, while in summer and autumn, the net radiation transformed mainly into the latent heat flux. Such phenomena had good relationship with the summer monsoon, the thawing and freezing processes of the active layer, and the variation of net radiation. In addition, Bowen ratio was 0.7 on average in summer and autumn, and 3.4 on average in winter and spring. The ratio ranged from -1.0 to 17.9, and exhibited that the Plateau seems a unique geographical unit. In addition, it was found that rainfall has great influence on the sensible and latent heat fluxes.[著者文摘]
Key words:
permafrost ; eddy covariance; flux-gradient approach
基金资助:
国家自然科学基金项目（40471026）;中国科学院知识创新工程重要方向项目（KZCX3-SW345）;国家重点基础研究发展计划（973计划）项目（2005CB422003）;中国科学院资源环境领域野外台站研究基金项目“青藏高原多年冻土活动层动态变化过程监测研究”资助
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