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Fisher discriminant analysis method applied in drought detection: an instance in an alpine meadow ecosystem

文献类型：期刊论文

作者Zhang, Tao4; Ji, Ximeng4; Tang, Yuanyuan4; Xu, Mingjie4; Zhang, Yangjian1,2,3; Zhao, Guang3; Chen, Ning5; Zhu, Juntao2,3; He, Yongtao1,3
刊名JOURNAL OF PLANT ECOLOGY
出版日期2022-10-01
卷号15期号:5页码:911-920
关键词soil water VPD GPP alpine meadow Tibetan Plateau
ISSN号1752-9921
DOI10.1093/jpe/rtac007
通讯作者Xu, Mingjie(xumj@syau.edu.cn) ; Zhang, Yangjian(zhangyj@igsnrr.ac.cn)
英文摘要Fisher discriminant analysis can comprehensively take multiple factors into consideration and effectively conduct separations between two classes. If it can be used to detect the occurrences of drought, drought can be detected more effectively and accurately. Based on 9-year carbon flux and corresponding meteorological data, soil water content (SWC) and vapor pressure deficit (VPD) were selected as the discriminant factors. Drought occurrences were detected by applying the Fisher discriminant analysis method in an alpine ecosystem in Tibet. Fisher discriminant analysis was successfully applied to detect drought occurrence in an alpine meadow ecosystem. The soil water deficit and atmospheric water deficit were comprehensively taken into consideration. Consequently, this method could detect the onset and end date of droughts more accurately and reasonably. Based on the characteristics of drought and non-drought samples, the discriminant equation was constructed as y = 24.46SWC - 4.60VPD. When y > 1, the days were distributed above the critical line. In addition, when y was greater than one for more than 10 days, it was labeled as one drought event. If the interval between two drought processes was less than 2 days, it was considered one drought event. With increasing the study period and continued accumulation of observation data, the discriminant equation could be further optimized in the future, resulting in more accurate drought detection.
WOS关键词3 GRASSLAND ECOSYSTEMS ; CARBON FLUXES ; AGRICULTURAL DROUGHT ; SOIL-WATER ; TEMPERATURE ; RESISTANCE ; DYNAMICS ; RESILIENCE ; CO2
资助项目National Natural Science Foundation of China[41725003] ; National Natural Science Foundation of China[31600362] ; National Natural Science Foundation of China[32061143037] ; National Key Research and Development Program of China[2017YFA0604801] ; China Postdoctoral Science Foundation[2018M631819] ; China Postdoctoral Science Foundation[2021M692230]
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Forestry
语种英语
WOS记录号WOS:000852303100004
出版者OXFORD UNIV PRESS
资助机构National Natural Science Foundation of China ; National Key Research and Development Program of China ; China Postdoctoral Science Foundation
源URL[http://ir.igsnrr.ac.cn/handle/311030/182838]  
专题中国科学院地理科学与资源研究所
通讯作者Xu, Mingjie; Zhang, Yangjian
作者单位1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
4.Shenyang Agr Univ, Coll Agron, Shenyang 110866, Peoples R China
5.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun 130102, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Tao,Ji, Ximeng,Tang, Yuanyuan,et al. Fisher discriminant analysis method applied in drought detection: an instance in an alpine meadow ecosystem[J]. JOURNAL OF PLANT ECOLOGY,2022,15(5):911-920.
APA Zhang, Tao.,Ji, Ximeng.,Tang, Yuanyuan.,Xu, Mingjie.,Zhang, Yangjian.,...&He, Yongtao.(2022).Fisher discriminant analysis method applied in drought detection: an instance in an alpine meadow ecosystem.JOURNAL OF PLANT ECOLOGY,15(5),911-920.
MLA Zhang, Tao,et al."Fisher discriminant analysis method applied in drought detection: an instance in an alpine meadow ecosystem".JOURNAL OF PLANT ECOLOGY 15.5(2022):911-920.

入库方式： OAI收割

来源：地理科学与资源研究所

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