globalchange  > 全球变化的国际研究计划
DOI: 10.1016/j.scitotenv.2019.04.365
WOS记录号: WOS:000468191200064
论文题名:
Detecting global irrigated areas by using satellite and reanalysis products
作者: Zohaib, Muhammad1; Kim, Hyunglok2; Choi, Minha1
通讯作者: Choi, Minha
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
ISSN: 0048-9697
EISSN: 1879-1026
出版年: 2019
卷: 677, 页码:679-691
语种: 英语
英文关键词: Soil moisture ; Remote sensing ; Land surface modeling ; Human alteration ; Land-atmosphere interaction, Irrigation ; Irrigation
WOS关键词: SOIL-MOISTURE RETRIEVALS ; SKIN TEMPERATURE ; WATER-RESOURCES ; SURFACE ALBEDO ; CLIMATE-CHANGE ; MODEL ; PRECIPITATION ; ASSIMILATION ; TRENDS ; MODIS
WOS学科分类: Environmental Sciences
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

Despite the importance of irrigation in meeting the world's food demand and as an essential human modification to water and energy cycles, the reliable extent and distribution of the global irrigated areas remain undefined. In this study, an intuitive method is proposed, based on the aftereffects of irrigation, to detect global irrigated areas by combining satellite and reanalysis datasets. The proposed methodology assumes that irrigation is an unmodeled land surface process, while satellite observations can effectively detect irrigation signals in near real-time. The spatial extents of irrigation were derived by calculating the difference between the remotely sensed and reanalysis datasets. To detect the irrigated areas, three irrigation-dependent variables, soil moisture (SM), land surface temperature (LST), and surface albedo (A(L)), were used. In the absence of reliable ground truths, the proposed irrigation map was compared to the commonly used global irrigation maps, namely Global Map of Irrigated areas, Global Irrigated Area Map, and recently developed Global Irrigated Areas by Meier et al. (2018). Individual detection by SM, LST, and A(L) has disarpandes in detecting irrigation signals in highly irrigated, urbanized, and semi-arid regions. However, by combining the individual detection maps, the proposed method showed reasonable agreement with the reference irrigated maps overlapping with approximately 70% of the irrigated areas. We believe that the proposed method, as stand-alone or in combination with the existing irrigation maps, will benefit the studies regarding water and energy balance closure in near-real time for large-scale land surface models by minimizing the uncertainties in model parameterization. (C) 2019 Elsevier B.V. All rights reserved.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/145357
Appears in Collections:全球变化的国际研究计划

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作者单位: 1.Sungkyunkwan Univ, Grad Sch Water Resources, Environm & Remote Sensing Lab, Suwon 440746, Gyeonggi Do, South Korea
2.Univ Virginia, Dept Engn Syst & Environm, Charlottesville, VA 22904 USA

Recommended Citation:
Zohaib, Muhammad,Kim, Hyunglok,Choi, Minha. Detecting global irrigated areas by using satellite and reanalysis products[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019-01-01,677:679-691
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