气候变化领域集成服务门户(CCPortal): Convective precipitation trends in the Spanish Mediterranean region

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DOI	10.1016/j.atmosres.2021.105581
	Convective precipitation trends in the Spanish Mediterranean region
	Llasat M.C.; del Moral A.; Cortès M.; Rigo T.
发表日期	2021
ISSN	0169-8095
卷号	257
英文摘要	This paper aims to analyse the distribution and temporal evolution of convective precipitation in the Mediterranean region of Spain. To accomplish this goal, we used 148 sets of 5-min rainfall rate data from the 1989–2015 period. The selected regions were the Júcar Hydrographic Confederation (CHJ) and the Internal Basins of Catalonia (CIC), which cover most of the autonomous communities of Catalonia and the Valencian Community (east Spain). The average 5-min intensity threshold of 35 mm/h and the β parameter, defined as the ratio between convective precipitation versus total precipitation in any period, were used to characterise convective precipitation. Convective episodes were categorised as “very convective”, “moderately convective”, and “slightly convective” based on the β value. After quality control, the series of 129 stations were clustered into homogeneous precipitation zones that also include β as one of the variables of characterisation. The results show that convective precipitation can contribute to total annual precipitation by up to 16% on average, but it is generated by a very small percentage of convective events (between 3% and 6% across all the stations) in comparison with the total number of rainfall episodes. In this sense, moderately convective events are the most common, with a predominantly unimodal monthly distribution of β, with summer the most convective season. Trends show a significant increase in precipitation, convective precipitation, and convective episodes in the CHJ. On the other hand, a positive trend of convective events is predominant in the CIC region, despite an overall precipitation decrease in the analysed period. These results are relevant given that extreme daily rainfall does not show a positive or significant trend, and they are in line with the impact of climate change on increased atmospheric instability and water vapour in the atmosphere. They highlight the need to work with sub-daily precipitation series in the case of the Mediterranean, which is mainly affected by flash floods. © 2021 Elsevier B.V.
英文关键词	Climate change; Convective precipitation; Flash floods; Heavy rainfalls; Mediterranean region
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236766
作者单位	GAMA, Department of Applied Physics, University of Barcelona, Barcelona, Spain; Meteorological Service of Catalonia, Barcelona, Spain; AEMET, Barcelona, Spain
推荐引用方式 GB/T 7714	Llasat M.C.,del Moral A.,Cortès M.,et al. Convective precipitation trends in the Spanish Mediterranean region[J],2021,257.
APA	Llasat M.C.,del Moral A.,Cortès M.,&Rigo T..(2021).Convective precipitation trends in the Spanish Mediterranean region.Atmospheric Research,257.
MLA	Llasat M.C.,et al."Convective precipitation trends in the Spanish Mediterranean region".Atmospheric Research 257(2021).