干旱区生态环境知识资源中心(Arid): Global observed and modelled impacts of irrigation on surface temperature

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DOI	10.1002/joc.5973
	Global observed and modelled impacts of irrigation on surface temperature
	Chen, Liang 1,2; Dirmeyer, Paul A.1
通讯作者	Chen, Liang
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2019
卷号	39 期号:5 页码:2587-2600
英文摘要	Agricultural irrigation has significant potential for altering local climate by reducing soil albedo, increasing evapotranspiration, and enabling greater leaf area. Numerous studies using regional or global climate models have demonstrated the cooling effects of irrigation on mean and extreme temperature, especially over regions where irrigation is extensive. However, these model-based results have not been well validated due to the limitations of observational data sets. In this study, multiple satellite-based products, including the Moderate Resolution Imaging Spectroradiometer (MODIS) and Soil Moisture Active Passive (SMAP) data sets, are used to isolate and quantify the local impacts of irrigation on surface climate over irrigated regions, which are derived from the Global Map of Irrigation Areas (GMIA). The relationships among soil moisture, albedo, evapotranspiration, and surface temperature are explored. Strong evaporative cooling by irrigation lowers daytime surface temperature over arid and semi-arid regions, such as California's Central Valley, the Great Plains, central Asia, and northwestern India. However, the cooling effects are less evident in areas of eastern China and the Lower Mississippi River Basin despite extensive irrigation over these regions. Results are also compared with irrigation experiments using the Community Earth System Model (CESM) to assess the model's ability to represent land-atmosphere interactions in regards to irrigation. CESM greatly underestimates the surface temperature response to irrigation. The comparison between the offline and coupled simulations suggests that the irrigation-induced cooling can be regulated by the interactions between land surface and atmosphere, and amplified signals are found over the hot spot regions. Meanwhile, model resolution can also influence the magnitude of the local cooling by irrigation.
英文关键词	CESM evaporative cooling irrigation land surface temperature
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000467048900006
WOS关键词	SOIL-MOISTURE ; CHLOROPHYLL FLUORESCENCE ; EMPIRICAL-EVIDENCE ; LAND MANAGEMENT ; COVER CHANGE ; FEEDBACKS ; WATER ; PRECIPITATION ; ATMOSPHERE ; CALIFORNIA
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216379
作者单位	1.George Mason Univ, Ctr Ocean Land Atmosphere Studies, Fairfax, VA 22030 USA; 2.Univ Illinois, Prairie Res Inst, Illinois State Water Survey, Climate & Atmospher Sci Sect, M-C 674, Champaign, IL 61820 USA
推荐引用方式 GB/T 7714	Chen, Liang,Dirmeyer, Paul A.. Global observed and modelled impacts of irrigation on surface temperature[J],2019,39(5):2587-2600.
APA	Chen, Liang,&Dirmeyer, Paul A..(2019).Global observed and modelled impacts of irrigation on surface temperature.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(5),2587-2600.
MLA	Chen, Liang,et al."Global observed and modelled impacts of irrigation on surface temperature".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.5(2019):2587-2600.