globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-18-4791-2014
Scopus记录号: 2-s2.0-84915819060
论文题名:
High-resolution land surface modeling utilizing remote sensing parameters and the Noah UCM: A case study in the Los Angeles Basin
作者: Vahmani P; , Hogue T; S
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期:12
起始页码: 4791
结束页码: 4806
语种: 英语
Scopus关键词: Atmospheric temperature ; Information management ; Land use ; Plants (botany) ; Rain ; Surface measurement ; Urban planning ; California irrigation management information systems ; Impervious surface area ; In-situ measurement ; Land surface modeling ; Land surface temperature ; Measured parameters ; Seasonal fluctuations ; Vegetation fractions ; Remote sensing ; data set ; evapotranspiration ; fractionation ; land surface ; Landsat ; MODIS ; numerical model ; parameterization ; pixel ; remote sensing ; resolution ; satellite imagery ; spatial distribution ; California ; Los Angeles Basin ; United States
英文摘要: In the current work we investigate the utility of remote-sensing-based surface parameters in the Noah UCM (urban canopy model) over a highly developed urban area. Landsat and fused Landsat-MODIS data are utilized to generate high-resolution (30 m) monthly spatial maps of green vegetation fraction (GVF), impervious surface area (ISA), albedo, leaf area index (LAI), and emissivity in the Los Angeles metropolitan area. The gridded remotely sensed parameter data sets are directly substituted for the land-use/lookuptable- based values in the Noah-UCM modeling framework. Model performance in reproducing ET (evapotranspiration) and LST (land surface temperature) fields is evaluated utilizing Landsat-based LST and ET estimates from CIMIS (California Irrigation Management Information System) stations as well as in situ measurements. Our assessment shows that the large deviations between the spatial distributions and seasonal fluctuations of the default and measured parameter sets lead to significant errors in the model predictions of monthly ET fields (RMSE D 22:06mmmonth-1). Results indicate that implemented satellite-derived parameter maps, particularly GVF, enhance the capability of the Noah UCM to reproduce observed ET patterns over vegetated areas in the urban domains (RMSED 11:77mmmonth-1). GVF plays the most significant role in reproducing the observed ET fields, likely due to the interaction with other parameters in the model. Our analysis also shows that remotely sensed GVF and ISA improve the model's capability to predict the LST differences between fully vegetated pixels and highly developed areas. © Author(s) 2014. CC Attribution 3.0 License.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78062
Appears in Collections:气候变化事实与影响

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作者单位: University of California, Los Angeles, CA, United States; Colorado School of Mines, Golden, CO, United States

Recommended Citation:
Vahmani P,, Hogue T,S. High-resolution land surface modeling utilizing remote sensing parameters and the Noah UCM: A case study in the Los Angeles Basin[J]. Hydrology and Earth System Sciences,2014-01-01,18(12)
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