DOI: 10.1016/j.gloplacha.2016.07.011
论文题名: The spatiotemporal patterns of rainfall erosivity in Yunnan Province, southwest China: An analysis of empirical orthogonal functions
作者: Duan X. ; Gu Z. ; Li Y. ; Xu H.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2016
卷: 144 起始页码: 82
结束页码: 93
语种: 英语
英文关键词: Climate change
; Rainfall erosivity
; Soil erosion
; Spatiotemporal patterns
; Yunnan Province
Scopus关键词: Climate change
; Erosion
; Rain
; Soils
; Daily rainfall records
; Empirical Orthogonal Function
; Meteorological observation stations
; Rainfall erosivity
; Soil erosion
; Spatio-temporal variation
; Spatiotemporal patterns
; Yunnan province
; Orthogonal functions
; climate change
; complex terrain
; empirical analysis
; erosivity
; mathematical analysis
; rainfall
; seasonal variation
; soil erosion
; spatial distribution
; spatiotemporal analysis
; trend analysis
; China
; Yunnan
英文摘要: Rainfall erosivity (R) influences the formation mechanisms and succession processes of soil erosion. Knowing of the R factor facilitates the prediction of soil erosion and of the impact of climate change on erosion. However, defining of the R factor is challenging because its spatiotemporal variation can be complex. We combined the Empirical Orthogonal Function (EOF), North criteria, and Mann-Kendall test (M-K) to investigate the spatiotemporal patterns of the R factor for a study area in a typical mountain plateau region of Yunnan Province (YP), China. Daily rainfall records from 1960 to 2012 were collected from 115 national meteorological observation stations in YP. Based on the daily rainfall erosivity estimating model, we determined that the average annual R factor was 4383.85 MJ·mm·ha− 1·h− 1, the seasonal R factor exhibited an order of summer > autumn > spring > winter, and the summer R was significantly higher than winter R. The spatiotemporal variation of the R factor was complex and did not reveal a uniform pattern. The spatial distribution revealed that the annual and seasonal R factors in the west were higher than those in the east, and R in the south were higher than those in the north. The temporal trends of annual, summer, and autumn R factors had decreasing trends from 1960 to 2012. On the contrary, the spring and winter R factors showed an increasing trend. The EOF analysis identified two typical spatiotemporal patterns of the annual R factor in YP, and three for spring, summer, autumn, and winter R factors. These patterns represented the influence of the monsoon, circulation systems, and complex terrain conditions on the rainfall in the YP. © 2016 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979523564&doi=10.1016%2fj.gloplacha.2016.07.011&partnerID=40&md5=1cfb2537ed63aee6c97ad5481cf6212d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11642
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: Institute of International Rivers and Eco–security, Yunnan University, Kunming, China
Recommended Citation:
Duan X.,Gu Z.,Li Y.,et al. The spatiotemporal patterns of rainfall erosivity in Yunnan Province, southwest China: An analysis of empirical orthogonal functions[J]. Global and Planetary Change,2016-01-01,144.