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Spatio-temporal variation of the wet-dry conditions from 1961 to 2015 in China
Yuan QuanZhi1,2; Wu ShaoHong3,4; Dai ErFu3,4; Zhao DongSheng3; Zhang XueRu5,6; Ren Ping1,2
2017-11-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume60Issue:11Pages:2041-2050
Corresponding AuthorWu ShaoHong(wush@igsnrr.ac.cn)
AbstractAs an important part of the regional environment, the wet-dry climate condition is determined by precipitation and potential evapotranspiration (expressed as ET (o)). Based on weather station data, this study first calculated ET (o) by using the FAO56 Penman-Monteith model. Then, the dryness index K (ratio of ET (o) to precipitation) was used to study the spatio-temporal variation of the wet-dry condition in China from 1961 to 2015; moreover, dominant climatic factors of the wet-dry condition change were discussed. The annual precipitation and ET (o) of the Qinling-Huaihe line were close to a balance (K approximate to 1.0). The annual precipitation in most areas exceeded the ET (o) in the south of this line and the east of Hengduan Mountains (K<1.0), where the climate is wet. Furthermore, the precipitation in the northwest inland areas of China, where the climate is dry, was markedly lower than ET (o) (K >= 4.0). The overall annual K of China fluctuated around the 55-year mean and its linear trend was not significant. However, a relatively wet period of about 10 yr (1987-1996) was recorded. The overall annual K of China showed strong cyclicality on the time scale of 3, 7-8, 11 and 26-28 yr, and regional differences of the annual K trends and cyclicality were large. The degrees of wetness in the Northwest China and western Qinghai-Tibet Plateau were substantially increased, whereas the degrees of dryness in the Yunnan-Guizhou Plateau, Sichuan Basin, and Loess Plateau were markedly increased. The linear trend of the annual K in most regions of China was not significant, and the annual K of most areas in China showed strong cyclicality on the 8-14 yr time scale. Precipitation was the dominant factor of wet-dry condition change in most areas, especially in North China, where the annual K change was highly correlated with precipitation.
KeywordWet-dry condition Climate dryness index Potential evapotranspiration Climate change China
DOI10.1007/s11430-017-9097-1
WOS KeywordCLIMATE-CHANGE ; LOESS PLATEAU ; EVAPOTRANSPIRATION ; ECOSYSTEM ; WATER
Indexed BySCI
Language英语
Funding ProjectKey Projects of National Natural Science Foundation of China[41530749] ; Youth Projects of National Natural Science Foundation of China[41501202] ; Youth Projects of National Natural Science Foundation of China[41701100] ; Science and Technology Project of Sichuan Provincial Department of Education[15ZB0023]
Funding OrganizationKey Projects of National Natural Science Foundation of China ; Youth Projects of National Natural Science Foundation of China ; Science and Technology Project of Sichuan Provincial Department of Education
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000413691300010
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/61104
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWu ShaoHong
Affiliation1.Sichuan Normal Univ, Key Lab Land Resources Evaluat & Monitoring South, Minist Educ, Chengdu 610068, Sichuan, Peoples R China
2.Sichuan Normal Univ, Inst Geog & Resources Sci, Chengdu 610101, Sichuan, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chongqing Jiaotong Univ, Coll Architecture & Urban Planning, Chongqing 400074, Peoples R China
6.Hebei Univ Econ & Business, Sch Publ Adm, Shijiazhuang 050061, Hebei, Peoples R China
Recommended Citation
GB/T 7714
Yuan QuanZhi,Wu ShaoHong,Dai ErFu,et al. Spatio-temporal variation of the wet-dry conditions from 1961 to 2015 in China[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(11):2041-2050.
APA Yuan QuanZhi,Wu ShaoHong,Dai ErFu,Zhao DongSheng,Zhang XueRu,&Ren Ping.(2017).Spatio-temporal variation of the wet-dry conditions from 1961 to 2015 in China.SCIENCE CHINA-EARTH SCIENCES,60(11),2041-2050.
MLA Yuan QuanZhi,et al."Spatio-temporal variation of the wet-dry conditions from 1961 to 2015 in China".SCIENCE CHINA-EARTH SCIENCES 60.11(2017):2041-2050.
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