DOI: 10.1002/joc.5467
论文题名: Cold-air pool evolution in a wide Pyrenean valley
作者: Conangla L. ; Cuxart J. ; Jiménez M.A. ; Martínez-Villagrasa D. ; Miró J.R. ; Tabarelli D. ; Zardi D.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 6 起始页码: 2852
结束页码: 2865
语种: 英语
英文关键词: cold-air pool
; drainage flow
; mesoscale simulation
; Pyrenean wide valley
; stable boundary layer
; turbulence
Scopus关键词: Atmospheric thermodynamics
; Boundary layers
; Drainage
; Lakes
; Turbulence
; Cold air pools
; Drainage flows
; Mesoscale simulation
; Pyrenean wide valley
; Stable boundary layer
; Landforms
; boundary layer
; cold air
; cold pool
; drainage
; mesoscale meteorology
; mountain region
; turbulence
; valley
; Pyrenees
英文摘要: This study on cold-air pool formation in the wide Cerdanya Valley in the Pyrenees mountain range was conducted using available observational information from September 2010 to August 2014. Cold-air pools occur during almost 60% of the nights, mainly during winter. Cold pools develop even under significant synoptic pressure gradients. Additionally, drainage currents transporting air down-valley occur most of the nights. In particular one representative cold-air pool event has been analysed in detail by a high-resolution mesoscale simulation, combined with an analysis of data from both ground-based stations and satellites. Radiative processes dominate the evolution of cold-air pools, together with turbulence in the lowest layers, while drainage flows down from the high mountains mainly through the tributary valleys and from the valley sidewall slopes play a key role in bringing air to the pool. Cold pool formation begins approximately 1 hr after sunset, and it extends across most of the valley bottom, with a very strong thermal inversion close to the surface that has a depth of up to 100 m in the lowest parts of the valley. Wind veers down-valley along the main axis 2–3 hr after sunset and the wind direction is approximately maintained until after sunrise. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116895
Appears in Collections: 气候减缓与适应
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作者单位: Department of Mining, Industrial and ICT Engineering, Polytechnic University of Catalonia, Manresa, Spain; Department of Physics, University of the Balearic Islands, Palma de Mallorca, Spain; Servei Meteorològic de Catalunya, Barcelona, Spain; Atmospheric Physics Group, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy
Recommended Citation:
Conangla L.,Cuxart J.,Jiménez M.A.,et al. Cold-air pool evolution in a wide Pyrenean valley[J]. International Journal of Climatology,2018-01-01,38(6)