DOI: 10.1016/j.gloplacha.2015.01.009
论文题名: Long-term change of wet and dry climatic conditions in the southwest karst area of China
作者: Liu B. ; Chen C. ; Lian Y. ; Chen J. ; Chen X.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 127 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: Dry condition
; Karst area of southwest china
; Long-term change propertie
; Temperature
; Wet condition
Scopus关键词: Climatology
; Drought
; Temperature
; Average annual precipitation
; Daily precipitations
; Dry condition
; Long term change
; Southern Sichuan Province
; Southwest China
; Total precipitation
; Wet conditions
; Landforms
; climate conditions
; extreme event
; karst
; long-term change
; precipitation assessment
; seasonal variation
; spatiotemporal analysis
; temperature gradient
; wetting-drying cycle
; China
英文摘要: Using the daily precipitation and temperature data at 153 stations in the karst area of Southwest China from 1959 to 2009, the long-term change characteristics of wet and dry climatic conditions are analyzed by the Mann-Kendall test. This study shows that: 1) the annual average temperature has increased at 88% of the stations with an average rate of +. 0.16. °C/10-year. This increase rate is greater than +. 0.30. °C/10-year in the southeastern, northeastern, and western parts of the study region. Very warm days and abnormally warm days were seen increased at 47% and 63% of the stations, respectively. Very cool days and abnormally cool days in a year have reduced at respectively 94% and 95% of the stations; 2) no clear change trend was found for average annual precipitation over the entire area as a whole, but regional and seasonal changes were quite obvious. The annual total precipitation has decreased by - 22.5. mm/10-year in the central part but increased by +. 8.9. mm/10-year in the western part of the region, and summer and winter seemed to become wetter while spring and autumn became drier. Although the number of rainy days in a year has decreased at almost 53% of the total stations with an average rate of - 3.9. days/10-year over the entire area, the number of extremely heavy rainy days has increased by +. 0.2, +. 0.4 and +. 0.4. days/10-year in the southern Sichuan Province, the central part of Yunnan Province, and the northeastern Hubei Province, respectively; and 3) the extreme drought became more serious. The consecutive dry days has increased significantly at nearly 46% of the stations, especially in the western Guangxi Autonomous Region, the southern Guizhou Province, and the eastern Chongqing Municipality. The extreme drought remained at a high frequency at the beginning of the 21st century. It has shifted gradually from the eastern and western parts to the south-central part which is characterized by medium-high rocky desertification. Hopefully findings from this study will help for a better understanding of the impacts to some eminent geological hazards such as rocky desertification, increased frequency of drought and storms, and landslides in recent years. © 2015 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921871035&doi=10.1016%2fj.gloplacha.2015.01.009&partnerID=40&md5=238ea0eee72a5ef9ce75ec830668cfd9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11546
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Department of Water Resources and Environment, Sun Yat-sen University, Guangzhou, China
Recommended Citation:
Liu B.,Chen C.,Lian Y.,et al. Long-term change of wet and dry climatic conditions in the southwest karst area of China[J]. Global and Planetary Change,2015-01-01,127.