DOI: 10.1175/JCLI-D-12-00730.1
Scopus记录号: 2-s2.0-84888046348
论文题名: Regional-scale rainy season onset detection: A new approach based on multivariate analysis
作者: Boyard-Micheau J. ; Camberlin P. ; Philippon N. ; Moron V.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 22 起始页码: 8916
结束页码: 8928
语种: 英语
Scopus关键词: Agroclimatology
; Climatic conditions
; Crucial parameters
; Interannual variability
; Intraseasonal variability
; Multi variate analysis
; Onset detection
; Rainfall thresholds
; Climate change
; Crops
; Principal component analysis
; Rain
; Parameterization
; annual variation
; climatology
; multivariate analysis
; parameterization
; precipitation assessment
; principal component analysis
; rainfall
; regional climate
; seasonal variation
英文摘要: In agroclimatology, the rainy season onset and cessation dates are often defined from a combination of several empirical rainfall thresholds. For example, the onset may be the first wet day of N consecutive days receiving at least P millimeters without a dry spell lasting n days and receiving less than p millimeters in the following C days. These thresholds are parameterized empirically in order to fit the requirements of a given crop and to account for local-scale climatic conditions. Such local-scale agroclimatic definition is rigid because each threshold may not be necessarily transposable to other crops and other climate environments. A new approach is developed to define onset/cessation dates and monitor their interannual variability at the regional scale. This new approach is less sensitive to parameterization and local-scale contingencies but still has some significance at the local scale. The approach considers multiple combinations of rainfall thresholds in a principal component analysis so that a robust signal across space and parameters is extracted. The regionalscale onset/cessation date is unequally influenced by input rainfall parameters used for the definition of the local rainy season onset. It appears that P is a crucial parameter to define onset, C plays a significant role at most stations, and N seems to be of marginal influence. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51542
Appears in Collections: 气候变化事实与影响
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作者单位: Centre de Recherches de Climatologie, Biogéosciences, UMR6282, CNRS/Université de Bourgogne, Dijon, France; CEREGE, UMR7330, Aix-Marseille Université and CNRS, Aix-en-Provence, France; International Research Institute for Climate and Society, Columbia University, New York, NY, United States
Recommended Citation:
Boyard-Micheau J.,Camberlin P.,Philippon N.,et al. Regional-scale rainy season onset detection: A new approach based on multivariate analysis[J]. Journal of Climate,2013-01-01,26(22)