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oaioai:ir.igsnrr.ac.cn:311030/12351

农田冠层与大气水汽通量耦合分析

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2002
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Abstract

退耦因子(Ω)是表征作物与周围大气水汽交换的重要指标。研究了引入Ω评价冬小麦与大气系统潜热通量的耦合度。一般在早晨和接近傍晚时作物与大气之间有较好的耦合度,主要是由于此时冠层导度(g_c)小;中午时由于风速很大,并且g_c达到全天最大值,作物与大气耦合度较差。Ω的季节变化由g_c控制,而g_c受叶面积指数的影响。在拔节期以前有均衡潜热通量(LE_(eq))>实际潜热通量(LE)>强加潜热通量(LE_(imp))的趋势,而在拔节期以后则呈强加潜热通量(LE_(imp))>实际潜热通量(LE)>均衡潜热通量(LE_(eq))的变化趋势

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Institutional Repository of Institute of Geographic Sciences and Natural Resources Research, CAS

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Last time updated on 29/11/2016

This paper was published in Institutional Repository of Institute of Geographic Sciences and Natural Resources Research, CAS.

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