DOI: 10.1016/j.atmosres.2019.01.011
Scopus记录号: 2-s2.0-85059934086
论文题名: Implementation and evaluation of a convective/stratiform precipitation scheme in Attica region, Greece
作者: Feloni E.G. ; Baltas E.A. ; Nastos P.T. ; Matsangouras I.T.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 220 起始页码: 109
结束页码: 119
语种: 英语
英文关键词: Attica region
; Convective precipitation
; Precipitation classification
; Rain rate
; Stratiform precipitation
; Verification measures
Scopus关键词: Classification (of information)
; Rain gages
; Surface analysis
; Attica region
; Classification approach
; Classification technique
; Climatological analysis
; Convective precipitation
; Morphological characteristic
; Rain rates
; Stratiform precipitation
; Rain
; climate classification
; convective system
; precipitation (climatology)
; precipitation intensity
; rainfall
; regional climate
; thunderstorm
; trend analysis
; Attica
; Greece
英文摘要: Attica, which is the region with the largest population in Greece, suffers from numerous high rainfall intensity events inducing flash floods and, consequently, significant damages in the urbanized areas. High rainfall intensities are frequently connected with convection, a quiet often phenomenon during either the transitional seasons or the late summer thunderstorms. The objective of this paper is to implement and evaluate a stratiform-convective classification technique for the rainfall events occurred in Attica during the period 2005–2016. As this methodology requires only the precipitation records, the satisfactory evaluation of this classification approach allows further applications, such as, a climatological analysis regarding convective and stratiform trends in the study area and generally in Greece. Particularly, the rain gauge stations’ records used correspond to 10-minute time series from 32 rainfall stations for the same period, and these data are analyzed and processed in order to fit a suitable exponential curve describing the stratiform component. A critical annual threshold of rainfall intensity in mm/6h is then calculated, separating the prevailing convective and stratiform regime above and below this value, respectively. The analysis is performed in three individual subareas of Attica region demarcated initially according to their morphological characteristics and subsequently by checking the cross-correlation for each pair of stations. This critical intensity threshold is determined for each year separately, in order to illustrate the uncertainty and the difficulty in identifying a standard threshold, as it is related to the annual behavior of precipitation. Using this threshold, a total of about 180 six-hour case events is detected as purely convective cases, however this number ranges for each subarea. For these cases, a further analysis is performed with the aim of verifying their convective character. Verification includes time-accurate lightning data, surface synoptic observations from the Hellenic National Meteorological Service and six-hour surface analysis charts from UK MetOffice. Findings, which are presented via indicative verification indices, show in general encouraging performance, considering the highly variable nature of convective precipitation which poses considerable problems in its identification with quite simple techniques. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122303
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Water Resources and Environmental Engineering, School of Civil Engineering, National Technical University of Athens, Heroon Polytechniou 9, Zografou, Athens, 15780, Greece; Laboratory of Climatology and Atmospheric Environment, Faculty of Geology and Geoenvironment, University of Athens, University Campus, Athens, 157 84, Greece; Department of Satellites and Radars, Hellenic National Meteorological Service, Athens, Greece
Recommended Citation:
Feloni E.G.,Baltas E.A.,Nastos P.T.,et al. Implementation and evaluation of a convective/stratiform precipitation scheme in Attica region, Greece[J]. Atmospheric Research,2019-01-01,220