DOI: 10.1175/JCLI-D-15-0171.1
Scopus记录号: 2-s2.0-84946234193
论文题名: Global relationship between fronts and warm conveyor belts and the impact on extreme precipitation
作者: Catto J.L. ; Madonna E. ; Joos H. ; Rudeva I. ; Simmonds I.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 21 起始页码: 8411
结束页码: 8429
语种: 英语
Scopus关键词: Belt conveyors
; Conveyors
; Storms
; Era interims
; Extratropical cyclones
; Extreme precipitation
; Extreme precipitation events
; Midlatitudes
; Southern Hemisphere
; Thermal criterion
; Warm conveyor belts
; Precipitation (meteorology)
; atmospheric dynamics
; atmospheric front
; cyclone
; extreme event
; precipitation intensity
; Southern Hemisphere
; synoptic meteorology
; troposphere
; warm front
英文摘要: Extratropical cyclones are responsible for many extreme precipitation events in the midlatitudes. Warm conveyor belts (WCBs) and fronts are known to be related to the uplift and hence the precipitation within cyclones. The authors have investigated the link between WCBs and fronts and how such a link impacts the occurrence of extreme precipitation events. WCB trajectories have been calculated from the ERA-Interim dataset, and low-level (below 790 hPa) and midlevel (790-600 hPa) WCBs have been considered. These have been matched with objectively identified fronts (i.e., characterized by an overlap of WCB and front somewhere along the front). About 10% of cold fronts, 8% of warm fronts (identified using a thermal criterion), and 15% of wind fronts (identified using a wind shift method) are matched with WCBs, while up to 70% of WCBs are matched with fronts. Some WCBs, especially in the Southern Hemisphere, are not matched with either type of front (up to 70% east of Australia). The relationship between WCBs and fronts does not change much between the low levels and midlevels, indicating that the WCBs are already strongly associated with fronts during the lowest part of their ascent, although in the Southern Hemisphere the WCBs are more often related to warm fronts during their midtropospheric ascent. In parts of the midlatitudes, more than 60% of extreme precipitation events match either cold or warm fronts, and up to 90% of these have matched WCBs. Fronts associated with WCBs are found to be between 2 and 10 times more likely to produce extreme precipitation events than fronts without associated WCBs. © 2015 American Meteorological Society. 资助项目: SNF, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50499
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth, Atmosphere and Environment, Monash University, Melbourne, VIC, Australia; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; School of Earth Sciences, University of Melbourne, Melbourne, VIC, Australia
Recommended Citation:
Catto J.L.,Madonna E.,Joos H.,et al. Global relationship between fronts and warm conveyor belts and the impact on extreme precipitation[J]. Journal of Climate,2015-01-01,28(21)