Arid
DOI10.1007/s12040-017-0885-0
Spatial and decadal variations in satellite-based terrestrial evapotranspiration and drought over Inner Mongolia Autonomous Region of China during 1982-2009
Zhang, Zhaolu1; Kang, Hui2; Yao, Yunjun3; Fadhil, Ayad M.4; Zhang, Yuhu5; Jia, Kun3
通讯作者Yao, Yunjun
来源期刊JOURNAL OF EARTH SYSTEM SCIENCE
ISSN2347-4327
EISSN0973-774X
出版年2017
卷号126期号:8
英文摘要

Evapotranspiration (ET) plays an important role in exchange of water budget and carbon cycles over the Inner Mongolia autonomous region of China (IMARC). However, the spatial and decadal variations in terrestrial ET and drought over the IMARC in the past was calculated by only using sparse meteorological point-based data which remain quite uncertain. In this study, by combining satellite and meteorology datasets, a satellite-based semi-empirical Penman ET (SEMI-PM) algorithm is used to estimate regional ET and evaporative wet index (EWI) calculated by the ratio of ET and potential ET (PET) over the IMARC. Validation result shows that the square of the correlation coefficients (R-2) for the four sites varies from 0.45 to 0.84 and the root-mean-square error (RMSE) is < 0.78 mm. We found that the ET has decreased on an average of 4.8 mm per decade (p = 0.10) over the entire IMARC during 1982-2009 and the EWI has decreased on an average of 1.1% per decade (p = 0.08) during the study period. Importantly, the patterns of monthly EWI anomalies have a good spatial and temporal correlation with the Palmer Drought Severity Index (PDSI) anomalies from 1982 to 2009, indicating EWI can be used to monitor regional surface drought with high spatial resolution. In high-latitude ecosystems of northeast region of the IMARC, both air temperature (T-a) and incident solar radiation (R-s) are the most important parameters in determining ET. However, in semiarid and arid areas of the central and southwest regions of the IMARC, both relative humidity (RH) and normalized difference vegetation index (NDVI) are the most important factors controlling annual variation of ET.


英文关键词Terrestrial evapotranspiration evaporative wet index inner Mongolia autonomous region surface drought
类型Article
语种英语
国家Peoples R China ; Iraq
收录类别SCI-E
WOS记录号WOS:000422757000001
WOS关键词LATENT-HEAT FLUX ; NET PRIMARY PRODUCTION ; SOIL-MOISTURE ; LAND ; MODIS ; EVAPORATION ; STEPPE ; VARIABILITY ; ECOSYSTEMS ; DATASET
WOS类目Geosciences, Multidisciplinary ; Multidisciplinary Sciences
WOS研究方向Geology ; Science & Technology - Other Topics
来源机构北京师范大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/200317
作者单位1.Shandong Univ Technol, Sch Resources & Environm Engn, Zibo 255000, Shandong, Peoples R China;
2.China Mobile Grp Beijing Co Ltd, Beijing 100027, Peoples R China;
3.Beijing Normal Univ, Fac Geog Sci, State Key Lab Remote Sensing Sci, Beijing 100875, Peoples R China;
4.Univ Kufa, Earth Sci Dept, Fac Sci, Najaf 34003, Iraq;
5.Capital Normal Univ, Coll Resource Environm & Tourism, Beijing 100048, Peoples R China
推荐引用方式
GB/T 7714
Zhang, Zhaolu,Kang, Hui,Yao, Yunjun,et al. Spatial and decadal variations in satellite-based terrestrial evapotranspiration and drought over Inner Mongolia Autonomous Region of China during 1982-2009[J]. 北京师范大学,2017,126(8).
APA Zhang, Zhaolu,Kang, Hui,Yao, Yunjun,Fadhil, Ayad M.,Zhang, Yuhu,&Jia, Kun.(2017).Spatial and decadal variations in satellite-based terrestrial evapotranspiration and drought over Inner Mongolia Autonomous Region of China during 1982-2009.JOURNAL OF EARTH SYSTEM SCIENCE,126(8).
MLA Zhang, Zhaolu,et al."Spatial and decadal variations in satellite-based terrestrial evapotranspiration and drought over Inner Mongolia Autonomous Region of China during 1982-2009".JOURNAL OF EARTH SYSTEM SCIENCE 126.8(2017).
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