Fog - low stratus (FLS) regimes on Corsica with wind and PBLH as key drivers

Fog - low stratus (FLS) regimes on Corsica with wind and PBLH as key drivers
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雾 - 科西嘉岛的低层云 (FLS) 状态,风和 PBLH 是主要驱动因素

DOI:
10.1016/j.atmosres.2021.105731
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发表时间:
2021
影响因子:
5.5
通讯作者:
Bendix
Bendix
中科院分区:
地球科学1区
文献类型:
--
作者:
Trachte;Bräuning;Häusser;Huneau;Juhlke;Santoni;Szymczak;van Geldern;Bendix

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法属地中海的科西嘉岛今天已经面临缺水的明显趋势,不仅导致社会经济问题,而且还导致生态问题。一个潜在的,但不是很普遍的水源是近地云的存在,主要是雾。在这项研究中,我们调查了科西嘉岛的雾-低层(FLS)频率,该频率来自Meteosat第二代SEVIRI数据集,其中雾和低层之间的区分几乎是不可用的遥感数据。研究了FLS频率与不同局地风的相互作用及其对ERA5再分析(欧洲中期天气预报中心,ECMWF)获得的行星边界层高度(PBLH)的依赖关系。结果表明:沿海地区日出时形成辐射FLS, PBLH较低;另一方面,在日落时,在岛屿内部,由于当地产生和相关的水汽输送,形成了最大的平流FLS。在岛的东侧,由于频繁的背风情况,FLS频率全年较低。由于西风减少了天气水汽输送,这种情况得到了加强,因此西风暴露的斜坡受益于FLS形成的水汽输入。
The French Mediterranean island of Corsica is already today confronted with a clear tendency towards water shortage, leading not only to socio-economical, but also to ecological problems. A potential, but not very widespread source of water is the presence of near-ground clouds, mostly fog. In this study, we investigate fog-low stratus (FLS) frequencies in Corsica, derived from a data set of Meteosat Second Generation SEVIRI, whereby a distinction between fog and low stratus is hardly feasible using remote sensing data. The FLS frequency was studied with respect to its interaction with distinct locally-generated wind and its dependence on the planetary boundary layer height (PBLH) obtained by ERA5 reanalysis (the fifth generation of the European Centre for Medium-Range Weather Forecasts, ECMWF). Results show that radiation FLS is formed in coastal areas at sunrise, with low PBLH. On the other hand, in the interior of the island at sunset, a maximum of advection FLS is formed, fostered by locally-generated and related transport of moisture. On the east side of the island, FLS frequency is lower throughout the year due to frequent lee situations. This situation is reinforced by reduced synoptic moisture transport by westerly winds, so that westerly exposed slopes benefit from moisture input by FLS formation.
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发表时间: 2011
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发表时间: 2018-01-01
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作者:
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发表时间: 2006
期刊:
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DOI: 10.1002/qj.2941
发表时间: 2017-01-01
影响因子: 8.9
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Egli, S.;Thies, B.;Bendix, J.
通讯作者: Bendix, J.
DOI: 10.1016/bs.agph.2015.01.001
发表时间: 2015
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