GSTDTAP  > 气候变化
DOI10.1002/2017JD027366
Do Lateral Flows Matter for the Hyperresolution Land Surface Modeling?
Ji, Peng1,2; Yuan, Xing1; Liang, Xin-Zhong3,4
2017-11-27
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2017
卷号122期号:22
文章类型Article
语种英语
国家Peoples R China; USA
英文摘要

Hyperresolution land surface modeling provides an unprecedented opportunity to simulate locally relevant water and energy cycle, but lateral surface and/or subsurface flows that are essential at fine scale are often neglected by most one-dimensional land surface models (LSMs). To analyze effects of lateral flows across scales, a Conjunctive Surface-Subsurface Process model, which considers soil moisture-surface flow interaction and quasi-three-dimensional subsurface flow, is implemented over a mountainous HyperHydro test bed in southwestern USA at different resolutions. Validation over more than 70 International Soil Moisture Network stations shows that there are significant improvements in soil moisture simulations from 30km to 4km as finer soil property and precipitation data are used, with correlation increased by 5%-16% and error decreased by 5%. Lateral surface flow has a significant influence on surface soil moisture and ground evaporation even at coarse resolution. Effect of lateral subsurface flow on soil moisture is nontrivial at 1km or finer resolution especially over wet areas. At 100m resolution, topography-induced lateral subsurface flow causes drier peaks and wetter valleys, decreases latent heat by 8% at peaks, while increases it by 12% at valleys. Furthermore, influences of lateral subsurface flow on ground evaporation and vegetation transpiration are more significant during dry season due to a stronger coupling between soil moisture and evapotranspiration. Therefore, it is worthy to incorporate lateral flow processes in hyperresolution LSMs to better represent water and energy heterogeneity even with limited hyperresolution meteorological and surface data.


英文关键词lateral flow land surface model high resolution soil moisture surface flux
领域气候变化
收录类别SCI-E
WOS记录号WOS:000418084500010
WOS关键词GROUNDWATER-FLOW ; SUBSURFACE FLOW ; OVERLAND-FLOW ; REPRESENTATION ; HETEROGENEITY ; SIMULATIONS ; VARIABILITY ; CATCHMENT ; FRAMEWORK ; DYNAMICS
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/32409
专题气候变化
作者单位1.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm Temperate East Asia, Beijing, Peoples R China;
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China;
3.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA;
4.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA
推荐引用方式
GB/T 7714
Ji, Peng,Yuan, Xing,Liang, Xin-Zhong. Do Lateral Flows Matter for the Hyperresolution Land Surface Modeling?[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(22).
APA Ji, Peng,Yuan, Xing,&Liang, Xin-Zhong.(2017).Do Lateral Flows Matter for the Hyperresolution Land Surface Modeling?.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(22).
MLA Ji, Peng,et al."Do Lateral Flows Matter for the Hyperresolution Land Surface Modeling?".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.22(2017).
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