DOI: 10.1002/joc.5528
论文题名: A 12-year radar-based climatology of daily and sub-daily extreme precipitation over the Swiss Alps
作者: Panziera L. ; Gabella M. ; Germann U. ; Martius O.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 10 起始页码: 3749
结束页码: 3769
语种: 英语
英文关键词: alpine climatology
; extreme precipitation
; sub-daily rainfall
; weather radar
Scopus关键词: Climatology
; Meteorological radar
; Radar measurement
; Rain gages
; Accumulation time
; Daily precipitations
; Daily rainfall
; Extreme precipitation
; High spatial resolution
; Intense rainfalls
; Precipitation map
; Surrounding regions
; Rain
; alpine environment
; extreme event
; precipitation (climatology)
; radar
; rainfall
; raingauge
; Alps
; Lake Maggiore
; Switzerland
英文摘要: The characterization of the alpine extreme precipitation is the basis to study the projected changes in frequency and intensity of heavy rainfall and is needed to improve the resilience of communities to high-impact weather. Climatological features of extreme daily and sub-daily precipitation are documented here for the Swiss Alps and surrounding regions at a high spatial resolution (1 km2). The basis is 12 years of data from rain gauges and CombiPrecip, a rainfall field produced by locally adjusting the radar precipitation map to the values measured by rain gauges. The agreement between rain gauges and CombiPrecip concerning both the timing and the magnitude of the extreme events is quantified by cross-validation; overall, it increases with diminishing the severity of the extremes and increasing accumulation time. If the extremes represent on average the 10 most intense rainfall accumulations per year, in general 50–65% of rain gauges extremes are extremes also for CombiPrecip, 40–50% of CombiPrecip extremes are not extremes according to rain gauges, and CombiPrecip extremes are till 7% lower than rain gauges extremes. The maps presented in this paper show that both daily and sub-daily extremes are more intense along the alpine slopes compared to the crest of the Alps in all seasons, with the Lago Maggiore region showing the largest values. The fraction of yearly rainfall due to extremes is generally smaller in the Alps than in flat terrain. Extreme 1-hr precipitation is more clustered in time in the inner Alps, but is less frequent, and exhibits a strong diurnal cycle in summer. The paper also shows that sub-daily and daily extremes occur essentially over the same 24-hr period. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116831
Appears in Collections: 气候减缓与适应
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作者单位: Oeschger Centre for Climate Change Research, Institute of Geography, University of Bern, Switzerland; MeteoSwiss, Locarno Monti, Switzerland
Recommended Citation:
Panziera L.,Gabella M.,Germann U.,et al. A 12-year radar-based climatology of daily and sub-daily extreme precipitation over the Swiss Alps[J]. International Journal of Climatology,2018-01-01,38(10)