Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-16845-2018 |
Impact of upstream moisture structure on a back-building convective precipitation system in south-eastern France during HyMeX IOP13 | |
Lee, Keun-Ok1; Flamant, Cyrille2,3; Duffourg, Fanny4,5; Ducrocq, Veronique4,5; Chaboureau, Jean-Pierre1 | |
2018-11-29 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:23页码:16845-16862 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | The present study examines the impact of the environmental moisture structure in the lower troposphere (below 2 km above sea level, a.s.l.) on the precipitation development, observed in southern France during Intensive Observation Period (IOP) 13 of the first Special Observation Period of the Hydrological cycle in the Mediterranean Experiment (HyMeX SOP-1), through a series of sensitivity experiments using the non-hydrostatic mesoscale atmospheric numerical model (Meso-NH). The control simulation (CNTL) and all the other 12 sensitivity experiments examined in this study succeed in reproducing a heavy precipitation event (HPE) in the coastal mountainous region of Var in south-eastern France as observed. The sensitivity experiments are designed to investigate the response of the HPE to the variability of the water vapour content upstream in the moist marine atmospheric boundary layer (MABL) and the drier air above. The comparisons between CNTL and the 12 sensitivity experiments show how the life cycle of precipitation associated with the HPE, but also the upstream flow (over the sea), is modified, even for moisture content changes of only 1 g kg(-1) below 2 km a.s.l. Within the low-level wind convergence between southerlies and south-westerlies, a small increase of moisture content in the MABL prolongs moderate precipitation (>= 5 mm in 15 min) and enlarges the area of weak precipitation (>= 1 mm in 15 min). The moistening in the 12 km a.s.l. layer, just above the MABL, prolongs the duration of moderate precipitation, for a similar total precipitation amount as in CNTL. The drier MABL and 1-2 km a.s.l. layer shorten the lifetime of precipitation and reduce the total precipitation amount with respect to CNTL. We also found that the moisture in the MABL has a stronger impact on producing enhanced precipitation (both in terms of amount and intensity) than the moisture just above (1-2 km a.s.l.). Also, it is worth noting that adding moisture in the MABL does not necessarily lead to enhanced precipitation amount. In moistening the MABL, the duration of moderate precipitation increases with increasing moisture as does the area covered by weak precipitation, while the area covered by the intense precipitation (>= 30 mm) decreases. Despite a simplified moisture-profile modification approach, this study suggests that moisture structure in the lower troposphere is key for accurate prediction at short-term range of the timing and location of precipitation in the coastal mountainous region in southern France. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451580600002 |
WOS关键词 | HEAVY PRECIPITATION ; NUMERICAL SIMULATIONS ; MESOSCALE ; EVENTS ; INITIATION ; PATTERNS ; RAINFALL ; MODEL ; PARAMETERIZATION ; MAINTENANCE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/17305 |
专题 | 地球科学 |
作者单位 | 1.Univ Toulouse, CNRS, Lab Aerol, UPS, Toulouse, France; 2.Sorbonne Univ, CNRS, LATMOS IPSL, Paris, France; 3.Univ Paris Saclay, Paris, France; 4.Univ Toulouse, CNRM, Meteo France, Toulouse, France; 5.CNRS, UMR3589, Toulouse, France |
推荐引用方式 GB/T 7714 | Lee, Keun-Ok,Flamant, Cyrille,Duffourg, Fanny,et al. Impact of upstream moisture structure on a back-building convective precipitation system in south-eastern France during HyMeX IOP13[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(23):16845-16862. |
APA | Lee, Keun-Ok,Flamant, Cyrille,Duffourg, Fanny,Ducrocq, Veronique,&Chaboureau, Jean-Pierre.(2018).Impact of upstream moisture structure on a back-building convective precipitation system in south-eastern France during HyMeX IOP13.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(23),16845-16862. |
MLA | Lee, Keun-Ok,et al."Impact of upstream moisture structure on a back-building convective precipitation system in south-eastern France during HyMeX IOP13".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.23(2018):16845-16862. |
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