DOI: 10.1002/2016JD025426
论文题名: Studying the influence of groundwater representations on land surface-atmosphere feedbacks during the European heat wave in 2003
作者: Keune J. ; Gasper F. ; Goergen K. ; Hense A. ; Shrestha P. ; Sulis M. ; Kollet S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 22 起始页码: 301
结束页码: 325
语种: 英语
英文关键词: 3-D groundwater
; groundwater parameterization
; heat wave
; land-atmosphere interactions
; statistical analysis
Scopus关键词: experimental study
; groundwater-surface water interaction
; heat wave
; hydrological cycle
; parameterization
; regional climate
; shallow water
; soil moisture
; soil-vegetation interaction
; three-dimensional modeling
; uncertainty analysis
; variance analysis
; water table
; Europe
英文摘要: The impact of 3D groundwater dynamics as part of the hydrologic cycle is rarely considered in regional climate simulation experiments. However, there exists a spatial and temporal connection between groundwater and soil moisture near the land surface, which can influence the land surface-atmosphere feedbacks during heat waves. This study assesses the sensitivity of bedrock-to-atmosphere simulations to groundwater representations at the continental scale during the European heat wave 2003 using an integrated fully coupled soil-vegetation-atmosphere model. The analysis is based on the comparison of two groundwater configurations: (1) 3D physics-based variably saturated groundwater dynamics and (2) a 1D free drainage (FD) approach. Furthermore, two different subsurface hydrofacies distributions (HFD) account for the uncertainty of the subsurface hydraulic characteristics, and ensemble simulations address the uncertainty arising from different surface-subsurface initial conditions. The results show that the groundwater representation significantly impacts land surface-atmosphere processes. Differences between the two groundwater configurations follow subsurface patterns, and the largest differences are observed for shallow water table depths. While the physics-based setup is less sensitive to the HFD, the parameterized FD simulations are highly sensitive to the hydraulic characteristics of the subsurface. An analysis of variance shows that both, the groundwater configuration and the HFD, induce variability across all compartments with decreasing impact from the subsurface to the atmosphere, while the initial condition has only a minor impact. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62810
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Agrosphere (IBG-3), Research Centre Jülich GmbH, Jülich, Germany; Meteorological Institute, University of Bonn, Bonn, Germany; Centre for High-Performance Scientific Computing in Terrestrial Systems, ABC/J Geoverbund, Jülich, Germany
Recommended Citation:
Keune J.,Gasper F.,Goergen K.,et al. Studying the influence of groundwater representations on land surface-atmosphere feedbacks during the European heat wave in 2003[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(22)