DOI: 10.1016/j.atmosres.2018.12.016
Scopus记录号: 2-s2.0-85058633494
论文题名: Simulation of extreme heat events over the Valencia coastal region: Sensitivity to initial conditions and boundary layer parameterizations
作者: Gómez I. ; Niclòs R. ; Estrela M.J. ; Caselles V. ; Barberà M.J.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 218 起始页码: 315
结束页码: 334
语种: 英语
英文关键词: Boundary layer parameterizations
; Extreme heat
; Mesoscale modelling
; Model initialization
; PBL parameterization schemes
; Summer temperatures
Scopus关键词: Atmospheric boundary layer
; Atmospheric movements
; Coastal zones
; Parameterization
; Weather forecasting
; Mesoscale modelling
; Meteorological condition
; Model initialization
; PBL parameterization
; Planetary boundary layers
; Regional atmospheric modeling systems
; Sensitivity to initial conditions
; Summer temperature
; Atmospheric temperature
; atmospheric modeling
; boundary layer
; coastal zone
; extreme event
; parameterization
; sea breeze
; summer
; temperature effect
; Comunidad Valencia
; Spain
英文摘要: The Valencia coastal region (Western Mediterranean) is especially sensitive to extreme heat events, where they are really common. However, due to its geophysical characteristics and climatic conditions, the incidence of high and extreme temperatures may still be modulated over this area by means of sea breeze circulations, defining a Sea Breeze Convergence Zone (SBCZ) due to the meet and interaction of these mesoscale conditions and Western synoptic-scale wind regimes. A proper definition of this convergence zone is of significant importance over the study area for the simulation and forecast of intense-heat meteorological events. This study analyses a week period in August 2010 over this area, which alternates the presence of meteorological conditions prone to high and extreme temperatures with sea breeze conditions that temper these extreme temperatures. The simulations have been performed using the mesoscale model Regional Atmospheric Modeling System (RAMS). The analysis focuses on the ability of different initial conditions and technical features and two widely used planetary boundary layer parameterizations to forecast and reproduce the observed high and extreme temperatures, as well as to properly capture the main associated atmospheric patterns. It has been found that an increased horizontal resolution in the initial atmospheric fields produces a better representation of the regional and local wind flows simulated by the mesoscale model, leading to an accurate characterization of the temperature fields when these wind circulations dominate over the area of study. However, no significant differences are obtained within the intense-heat situations, associated with atmospheric synoptic-scale forcings. Regarding PBL parameterizations, the local PBL scheme tends to underestimate the daytime temperatures, while the non-local scheme produces higher temperatures than the local scheme, skilfully reproducing the observations. Additionally, the non-local scheme overestimates temperatures at night-time, but it suitably captures the observed high minimum temperatures produced by the Western synoptic conditions. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122334
Appears in Collections: 气候变化事实与影响
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作者单位: Earth Physics and Thermodynamics Department, Faculty of Physics, University of Valencia, Doctor Moliner, 50, Burjassot, Valencia 46100, Spain; Environment and Earth Sciences Department, Faculty of Sciences, University of Alicante, Section 99, Alicante, E-03080, Spain; Geography Department, Faculty of Geography and History, University of Valencia, Avda. Blasco Ibáñez, 28, Valencia, 46010, Spain
Recommended Citation:
Gómez I.,Niclòs R.,Estrela M.J.,et al. Simulation of extreme heat events over the Valencia coastal region: Sensitivity to initial conditions and boundary layer parameterizations[J]. Atmospheric Research,2019-01-01,218