Detection and use of three signatures of soil-limited evaporation
Detection and use of three signatures of soil-limited evaporation
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DOI：
10.1016/s0034-4257(98)00076-5
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发表时间：
1999-01-01
影响因子：
13.5
通讯作者：
Salvucci, GD
中科院分区：
文献类型：
--
作者：
Amano, E;Salvucci, GD
从大气限制到土壤限制蒸发的转变表现在地表温度和湿度的增加，以及近地表水分含量的稳定。从地面和卫星遥感测量数据可以不同程度地推断出这些变化。在1987年和1989年第一次国际卫星陆地表面气候学项目实地试验期间，对一个蒸发模型（为裸土条件导出）进行了三次风暴间期间的测试，该模型取决于降雨和这种过渡之间的时间（t（d））。一般来说，根据对蒸发量、地表温度和表层土壤湿度的空间平均地面测量值计算的t（d）与根据模型对实测蒸发率的最佳拟合估计的t（d）相差2至4天。对于干燥下来跨越1987年9月中旬至10月中旬，从地球静止业务环境卫星（GOES）数据估计的白天和夜间温度差异产生了类似的过渡时间。植被对模型实用性和从遥感确定t（d）的能力的影响进行了讨论的背景下，密集和稀疏植被的网站内的FIFE实验区。(C)Elsevier Science Inc.，1998.
The transition from atmosphere-limited to soil-limited evaporation is manifested in increasing surface temperature and albedo, as well as a steadying of near-surface moisture content. Each of these changes can be inferred to varying degree from ground-based and satellite-based remote sensing measurements. An evaporation model (derived for bare soil conditions) that depends on the time (t(d)) between rainfall and this transition was tested on three interstorm periods during the first International Satellite Land Surface Climatology Project field experiment in 1987 and 1989. In general, t(d) calculated from spatially averaged ground-based measurements of albedo, surface temperature, and surface soil moisture fell within 2 to 4 days of the t(d) estimated from the best fit of the model to the measured evaporation rates. For the dry down spanning mid-September to mid-October 1987, albedo and daytime temperature differences estimated from geostationary operational environmental satellite (GOES) data yielded similar transition times. The effects of vegetation on model utility and on the ability to determine t(d) from remote sensing are discussed in the context of densely and sparsely vegetated sites within the FIFE experimental area. (C) Elsevier Science Inc., 1998.