DOI: 10.1007/s00382-015-2628-8
Scopus记录号: 2-s2.0-84957428432
论文题名: Potential negative effects of groundwater dynamics on dry season convection in the Amazon River basin
作者: Lin Y.-H. ; Lo M.-H. ; Chou C.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-03-04 起始页码: 1001
结束页码: 1013
语种: 英语
英文关键词: Amazon River basin
; Groundwater
; Moist static energy
英文摘要: Adding a groundwater component to land surface models affects modeled precipitation. The additional water supply from the subsurface contributes to increased water vapor in the atmosphere, resulting in modifications of atmospheric convection. This study focuses on how groundwater dynamics affect atmospheric convection in the Amazon River basin (ARB) during July, typically the driest month. Coupled groundwater–land–atmosphere model simulations show that groundwater storage increases evapotranspiration rates (latent heat fluxes) and lowers surface temperatures, which increases the surface pressure gradient and thus, anomalous surface divergence. Therefore, the convection over the Southern Hemispheric ARB during the dry season becomes weaker when groundwater dynamics are included in the model. Additionally, the changes in atmospheric vertical water vapor advection are associated with decreases in precipitation that results from downwelling transport anomalies. The results of this study highlight the importance of subsurface hydrological processes in the Amazon climate system, with implications for precipitation changes during the dry season, observed in most current climate models. © 2015, The Author(s). 资助项目: NTU, National Taiwan University
; NTU, National Taiwan University
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53837
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan; Research Center for Environment Changes, Academia Sinica, Taipei, Taiwan
Recommended Citation:
Lin Y.-H.,Lo M.-H.,Chou C.. Potential negative effects of groundwater dynamics on dry season convection in the Amazon River basin[J]. Climate Dynamics,2016-01-01,46(2017-03-04)