干旱区生态环境知识资源中心(Arid): 基于涡动相关仪验证的SEBS模型对黑河中游地表蒸散发的估算研究

Arid

	基于涡动相关仪验证的SEBS模型对黑河中游地表蒸散发的估算研究
其他题名	Estimating the evapotranspiration in the middle reaches of the Heihe River by SEBS model based on the eddy covariance system
	吴雪娇; 周剑; 李妍; 潘晓多; 周彦召
来源期刊	冰川冻土
ISSN	1000-0240
出版年	2014
卷号	36 期号:6 页码:1538-1547
中文摘要	在我国西北干旱和半干旱地区, 农业收获主要依靠灌溉保证, 灌溉绿洲的蒸散发(ET)是当地水资源的主要消耗. 通过遥感估算区域灌溉绿洲的ET对于地区合理利用水资源极其重要, 利用MODIS/Terra 影像, 基于物理过程的地表能量平衡模型(SEBS), 结合WRF模式输出的气候驱动数据和地面观测数据来估算黑河中游地区的地表通量和日蒸散发(ET_(daily)). 估算的ET用不同下垫面的涡动相关仪观测数据进行验证, 结果显示: SEBS模型估算的不同下垫面的ET_(daily)具有很好的拟合效果(R~2 = 0.96, P<0.001), 在灌溉绿洲估算的ET_(daily)比实测值偏高, 说明干旱、半干旱地区灌溉绿洲土壤水分胁迫是影响ET的主要因素. 模型估算绿洲作物生长期间的ET_(daily)和实测的ET_(daily)平均相对误差为12.5%, 精度在观测的能量不闭合误差以内且精度比戈壁和沙漠地区高.
英文摘要	Irrigated oasis is the primary water consumer in semi-arid and arid regions of Northwest China. Correctly estimating the evapotranspiration (ET) of irrigation oasis through remote sensing is of prime importance for studying the water resources in this region. The Surface Energy Balance System (SEBS) model based on physical processes has been developed to estimate the land surface fluxes by using remotely sensed data and available meteorological observations. In this study, together with MODIS/Terra images, in combination of climate forcing data derived from Weather Research and Forecasting (WRF) model, the SEBS model was utilized to estimate the evapotranspiration and other surface fluxes over the middle reaches of the Heihe River, Northwest China. The estimated daily evapotranspiration (ET_(daily)) was validated by using measurement of ET with eddy covariance (EC) system in different landscapes (oasis, gobi, and desert). The results show that the estimated ET_(daily) agrees with the measured ET_(daily) very well (R~2=0.96, P<0.001), and the estimated ET_(daily) is a little higher than that measured in irrigation oasis, demonstrating soil water stress is the primary factor affecting ET on irrigation oasis in semi-arid and arid regions. The mean error is 0.76 between estimated ET_(daily) and measured ET_(daily) in irrigation oasis during crop growth period, with mean relative error of 12.5%, which is better than that in gobi and desert regions.
中文关键词	蒸散发 ; 地表通量 ; 空间异质性 ; 黑河中游
英文关键词	MODIS MODIS evapotranspiration surface flux spatial heterogeneity middle reaches of the Heihe River
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:5331911
来源机构	中国科学院西北生态环境资源研究院 ; 兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230809
作者单位	吴雪娇, 中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国.; 周剑, 中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国.; 潘晓多, 中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国.; 周彦召, 中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国.; 李妍, 兰州大学信息科学与工程学院, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	吴雪娇,周剑,李妍,等. 基于涡动相关仪验证的SEBS模型对黑河中游地表蒸散发的估算研究[J]. 中国科学院西北生态环境资源研究院, 兰州大学,2014,36(6):1538-1547.
APA	吴雪娇,周剑,李妍,潘晓多,&周彦召.(2014).基于涡动相关仪验证的SEBS模型对黑河中游地表蒸散发的估算研究.冰川冻土,36(6),1538-1547.
MLA	吴雪娇,et al."基于涡动相关仪验证的SEBS模型对黑河中游地表蒸散发的估算研究".冰川冻土 36.6(2014):1538-1547.