摘要
采用平流－干旱模型估算麦田的潜热，并与波文比法对比，结果表明，该模型可用于估算农田蒸散，还用此模型计算分析了麦田的热平流，以及冠层温度和冠层阻力，发现麦田平流午间很小，日落之后平流开始逐渐加强，最大可达４０Ｗ／ｍ￣２，但具有明显的阵性。冠层温度与气温之差最大值和净辐射最大值同时出现，位相比净辐射超前２ｈ．冠层阻力上午小，下午大，它们都具有明显的日变化特征。
A advection－aridity model is used to estimate the evapotranspiration in winter wheat field．Themodel is tested with the Bowen ratio- energy balance method，The characteristics of advection，canopy temperature and canopy resistance in winter wheat fleld are analysed，results show that advec-tive heat flux is small at noon, but enhances after sun set．It is usually not more than 40W／m and itvibrates fitfully，The diference of canopy surface temperature－air temperature reaches its toppest atsame time as the toppest of net radiation，The canopy resistance iS much small In the morning，andthen increases gradually in the afternoon，
出处
《中国农业气象》
CSCD
北大核心
1995年第6期1-4,38,共5页
Chinese Journal of Agrometeorology
关键词
平流
干旱模型
潜热
平流
温度
冠层阻力
麦田
：Advection- Aridity model Latent heat Cenvection Canopy surface temperature Canopy resistance
