DOI: 10.5194/hess-20-2001-2016
Scopus记录号: 2-s2.0-84969847875
论文题名: Combined measurement and modeling of the hydrological impact of hydraulic redistribution using CLM4.5 at eight AmeriFlux sites
作者: Fu C ; , Wang G ; , Goulden M ; L ; , Scott R ; L ; , Bible K ; , Cardon Z ; G
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 5 起始页码: 2004
结束页码: 2018
语种: 英语
Scopus关键词: Budget control
; Drought
; Ecology
; Ecosystems
; Evapotranspiration
; Moisture
; Soil moisture
; Soils
; Surface measurement
; Surface waters
; Vegetation
; Combined measurements
; Community land models
; Hydrological impacts
; Land surface models
; Soil moisture dynamics
; Soil-moisture limits
; Southern California
; Vegetation condition
; Climate models
; Bowen ratio
; ecosystem modeling
; energy budget
; evapotranspiration
; hybrid
; hydraulic property
; hydrological modeling
; land surface
; soil moisture
; surface water
; temperature gradient
; vegetation
; Arizona
; California
; Santa Rita Experimental Range
; United States
; Washington [United States]
; Wind River
; Wyoming
; Prosopis
英文摘要: Effects of hydraulic redistribution (HR) on hydrological, biogeochemical, and ecological processes have been demonstrated in the field, but the current generation of standard earth system models does not include a representation of HR. Though recent studies have examined the effect of incorporating HR into land surface models, few (if any) have done cross-site comparisons for contrasting climate regimes and multiple vegetation types via the integration of measurement and modeling. Here, we incorporated the HR scheme of Ryel et al. (2002) into the NCAR Community Land Model Version 4.5 (CLM4.5), and examined the ability of the resulting hybrid model to capture the magnitude of HR flux and/or soil moisture dynamics from which HR can be directly inferred, to assess the impact of HR on land surface water and energy budgets, and to explore how the impact may depend on climate regimes and vegetation conditions. Eight AmeriFlux sites with contrasting climate regimes and multiple vegetation types were studied, including the Wind River Crane site in Washington State, the Santa Rita Mesquite savanna site in southern Arizona, and six sites along the Southern California Climate Gradient. HR flux, evapotranspiration (ET), and soil moisture were properly simulated in the present study, even in the face of various uncertainties. Our cross-ecosystem comparison showed that the timing, magnitude, and direction (upward or downward) of HR vary across ecosystems, and incorporation of HR into CLM4.5 improved the modelmeasurement matches of evapotranspiration, Bowen ratio, and soil moisture particularly during dry seasons. Our results also reveal that HR has important hydrological impact in ecosystems that have a pronounced dry season but are not overall so dry that sparse vegetation and very low soil moisture limit HR. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78840
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Center for Environmental Science and Engineering, University of Connecticut, Storrs, CT, United States; Department of Earth System Science, University of California, Irvine, CA, United States; Southwest Watershed Research Center, Agricultural Research Service, USDA, Tucson, AZ, United States; Wind River Canopy Crane Research Facility, School of Environmental and Forest Sciences, University of Washington, Carson, WA, United States; Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA, United States
Recommended Citation:
Fu C,, Wang G,, Goulden M,et al. Combined measurement and modeling of the hydrological impact of hydraulic redistribution using CLM4.5 at eight AmeriFlux sites[J]. Hydrology and Earth System Sciences,2016-01-01,20(5)