DOI: 10.1002/joc.5199
论文题名: A new precipitation and drought climatology based on weather patterns
作者: Richardson D. ; Fowler H.J. ; Kilsby C.G. ; Neal R.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 2 起始页码: 630
结束页码: 648
语种: 英语
英文关键词: climatology
; drought severity index
; Lamb weather types
; meteorological drought
; precipitation
; standardized precipitation index
; UK
; weather patterns
Scopus关键词: Binary alloys
; Classification (of information)
; Climatology
; Precipitation (chemical)
; Stream flow
; Drought severity
; Lamb weather types
; Meteorological drought
; Standardized precipitation index
; Weather patterns
; Drought
; atmospheric circulation
; climate classification
; climatology
; drought
; precipitation (climatology)
; regional pattern
; weather
; United Kingdom
英文摘要: Weather-pattern, or weather-type, classifications are a valuable tool in many applications as they characterize the broad-scale atmospheric circulation over a given region. This study analyses the aspects of regional UK precipitation and meteorological drought climatology with respect to a new set of objectively defined weather patterns. These new patterns are currently being used by the Met Office in several probabilistic forecasting applications driven by ensemble forecasting systems. Weather pattern definitions and daily occurrences are mapped to Lamb weather types (LWTs), and parallels between the two classifications are drawn. Daily precipitation distributions are associated with each weather pattern and LWT. Standardized precipitation index (SPI) and drought severity index (DSI) series are calculated for a range of aggregation periods and seasons. Monthly weather-pattern frequency anomalies are calculated for SPI wet and dry periods and for the 5% most intense DSI-based drought months. The new weather-pattern definitions and daily occurrences largely agree with their respective LWTs, allowing comparison between the two classifications. There is also broad agreement between weather pattern and LWT changes in frequencies. The new data set is shown to be adequate for precipitation-based analyses in the UK, although a smaller set of clustered weather patterns is not. Furthermore, intra-pattern precipitation variability is lower in the new classification compared to the LWTs, which is an advantage in this context. Six of the new weather patterns are associated with drought over the entire UK, with several other patterns linked to regional drought. It is demonstrated that the new data set of weather patterns offers a new opportunity for classification-based analyses in the UK. © 2017 The Authors. International Journal of Climatology published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117112
Appears in Collections: 气候减缓与适应
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作者单位: School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, United Kingdom; Department of Weather Science, Met Office, Exeter, United Kingdom
Recommended Citation:
Richardson D.,Fowler H.J.,Kilsby C.G.,et al. A new precipitation and drought climatology based on weather patterns[J]. International Journal of Climatology,2018-01-01,38(2)