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地理科学  2013 

疏勒河上游高寒草甸蒸散对比研究

, PP. 97-103

Keywords: 蒸散,涡度相关法,波文比,小型蒸渗仪,高寒草甸,疏勒河流域

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Abstract:

利用疏勒河上游草地综合观测点2011年草甸主要生长季节的观测资料,应用小型蒸渗仪法(ML)、涡动相关法(EC)、波文比能量平衡法(BREB)对高寒草甸的蒸散量进行估算和比较分析.结果发现在观测期间涡度相关法与能量平衡法所测定结果存在能量不闭合现象,能量平衡闭合度0.84;波文比法估算的蒸散量为270.6mm,比蒸渗仪法测定结果(238.9mm)高13%,比涡度相关法结果(236.1mm)高出15%.3种方法估算结果均有较好相关性.涡度相关法可能低估蒸散量,波文比能量平衡法对蒸散量有所高估.考虑到蒸散估算精度和连续性观测等方面,涡度相关法更具优势.

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