Effects of a groundwater scheme on the simulation of soil moisture and evapotranspiration over southern South America
Effects of a groundwater scheme on the simulation of soil moisture and evapotranspiration over southern South America
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DOI：
10.1175/jhm-d-16-0051.1
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发表时间：
2016-11
影响因子：
3.8
通讯作者：
J. A. Martinez;F. Dominguez;G. Miguez-Macho
中科院分区：
文献类型：
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作者：
J. A. Martinez;F. Dominguez;G. Miguez-Macho
摘要利用Noah-MP陆面模式模拟了南美洲南部地下水动态对水储量和蒸散量的影响。该模型运行有三种不同的配置：一个包括Miguez-Macho和风扇地下水计划，另一个简单的地下水模型（SIMGM），和其他自由排水在土柱底部。第一个目标是使用大陆尺度（20公里）区域气候模型模拟的典型网格尺寸评估地下水方案的影响。的相位和幅度的波动，在亚马逊河南部的陆地水存储与地下水计划之一得到改善。在地下水位接近陆地表面的地区，包括亚马孙西部和南部以及拉普拉塔盆地，土壤表层2米的水分增加。这导致ET在南部的拉普拉塔基地的增加。
AbstractThe effects of groundwater dynamics on the representation of water storage and evapotranspiration (ET) over southern South America are studied from simulations with the Noah-MP land surface model. The model is run with three different configurations: one including the Miguez-Macho and Fan groundwater scheme, another with the Simple Groundwater Model (SIMGM), and the other with free drainage at the bottom of the soil column. The first objective is to assess the effects of the groundwater schemes using a grid size typical of regional climate model simulations at the continental scale (20 km). The phase and amplitude of the fluctuations in the terrestrial water storage over the southern Amazon are improved with one of the groundwater schemes. An increase in the moisture in the top 2 m of the soil is found in those regions where the water table is closer to the land surface, including the western and southern Amazon and the La Plata basin. This induces an increase in ET over the southern La Plata basi...