Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3058-y |
Atmospheric conditions associated with heavy precipitation events in comparison to seasonal means in the western mediterranean region | |
Khodayar, Samiro; Kalthoff, Norbert; Kottmeier, Christoph | |
2018-08-01 | |
发表期刊 | CLIMATE DYNAMICS
![]() |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51期号:3页码:951-967 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | The autumn atmospheric conditions associated with Heavy Precipitation Events (HPEs) in the western mediterranean region and differences with respect to the seasonal-mean conditions are investigated. Seasonal high-resolution simulations from the regional climate model COSMO-CLM covering the autumn periods of 2011 and 2012 are used. Atmospheric conditions at five different subdomains surrounding the western Mediterranean are considered, namely France, Italy (North and South), Spain, and North Africa. During HPEs, moisture and instability sources are located generally upstream of the target area over the sea, being transported by fast low-level winds towards the HPE areas. Concentration of high humidity over land and initiation of convection are highly related to the orography in the area. Stronger convective precipitation events occur at mid-level elevations rather than at higher altitudes. The significant increase in atmospheric moisture and instability, identified prior to HPEs, builds up in two different time lengths: atmospheric moisture increase could be traced back to at least 6-24 h before the initiation stage of the event, whereas an increase of Convective Available Potential Energy (CAPE) is detected in the hours prior to the event during the mature stage. The most intense HPEs are in general associated with higher values of integrated water vapour, CAPE, and low-level and mid-tropospheric wind speed. During HPEs in all subdomains, the dominant precipitation peak occurs between 1200 and 1800 UTC suggesting that convective precipitation prevails in most HPEs. The diurnal cycle of integrated water vapour during the mature stage of HPEs shows that the atmosphere remains wetter than average for most of the period and that only a decrease is seen after the afternoon precipitation peak. Negligible CAPE characterizes mean-seasonal conditions while the classical diurnal cycle with the peak in the early afternoon and much higher mean values occur during HPE events. Despite significant differences in the precipitation distribution and characteristics of the investigated subdomains, similar mechanisms are identified in relation to HPE environments and considerable contrasts compared to the mean-seasonal conditions. |
英文关键词 | Heavy precipitation events Mediterranean region HyMeX Seasonal conditions Atmospheric water vapour |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439141800012 |
WOS关键词 | OROGRAPHIC PRECIPITATION ; EXTREME PRECIPITATION ; NUMERICAL SIMULATIONS ; CONVECTIVE SYSTEMS ; SOUTHERN FRANCE ; PIEDMONT FLOOD ; CLIMATE MODEL ; RAINFALL ; CLASSIFICATION ; PREDICTABILITY |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36047 |
专题 | 气候变化 |
作者单位 | KIT, Inst Meteorol & Climate Res IMK TRO, Postfach 3640, D-76021 Karlsruhe, Germany |
推荐引用方式 GB/T 7714 | Khodayar, Samiro,Kalthoff, Norbert,Kottmeier, Christoph. Atmospheric conditions associated with heavy precipitation events in comparison to seasonal means in the western mediterranean region[J]. CLIMATE DYNAMICS,2018,51(3):951-967. |
APA | Khodayar, Samiro,Kalthoff, Norbert,&Kottmeier, Christoph.(2018).Atmospheric conditions associated with heavy precipitation events in comparison to seasonal means in the western mediterranean region.CLIMATE DYNAMICS,51(3),951-967. |
MLA | Khodayar, Samiro,et al."Atmospheric conditions associated with heavy precipitation events in comparison to seasonal means in the western mediterranean region".CLIMATE DYNAMICS 51.3(2018):951-967. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论