气候变化领域集成服务门户(CCPortal): EARLINET observations of Saharan dust intrusions over the northern Mediterranean region (2014-2017): Properties and impact on radiative forcing

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DOI	10.5194/acp-20-15147-2020
	EARLINET observations of Saharan dust intrusions over the northern Mediterranean region (2014-2017): Properties and impact on radiative forcing
	Soupiona O.; Papayannis A.; Kokkalis P.; Foskinis R.; Sánchez Hernández G.; Ortiz-Amezcua P.; Mylonaki M.; Papanikolaou C.-A.; Papagiannopoulos N.; Samaras S.; Groß S.; Mamouri R.-E.; Alados-Arboledas L.; Amodeo A.; Psiloglou B.
发表日期	2020
ISSN	1680-7316
起始页码	15147
结束页码	15166
卷号	20 期号:23
英文摘要	Remote sensing measurements of aerosols using depolarization Raman lidar systems from four EARLINET (European Aerosol Research Lidar Network) stations are used for a comprehensive analysis of Saharan dust events over the Mediterranean basin in the period 2014-2017. In this period, 51 dust events regarding the geometrical, optical and microphysical properties of dust were selected, classified and assessed according to their radiative forcing effect on the atmosphere. From west to east, the stations of Granada, Potenza, Athens and Limassol were selected as representative Mediterranean cities regularly affected by Saharan dust intrusions. Emphasis was given on lidar measurements in the visible (532nm) and specifically on the consistency of the particle linear depolarization ratio (δp532), the extinction-to-backscatter lidar ratio (LR532) and the aerosol optical thickness (AOT532) within the observed dust layers. We found mean δp532 values of 0.24±0.05, 0.26±0.06, 0.28±0.05 and 0.28±0.04, mean LR532 values of 52±8, 51±9, 52±9 and 49±6sr and mean AOT532 values of 0.40±0.31, 0.11±0.07, 0.12±0.10 and 0.32±0.17, for Granada, Potenza, Athens and Limassol, respectively. The mean layer thickness values were found to range from ∼1700 to ∼3400ma.s.l. Additionally, based also on a previous aerosol type classification scheme provided by airborne High Spectral Resolution Lidar (HSRL) observations and on air mass backward trajectory analysis, a clustering analysis was performed in order to identify the mixing state of the dusty layers over the studied area. Furthermore, a synergy of lidar measurements and modeling was used to analyze the solar and thermal radiative forcing of airborne dust in detail. In total, a cooling behavior in the solar range and a significantly lower heating behavior in the thermal range was estimated. Depending on the dust optical and geometrical properties, the load intensity and the solar zenith angle (SZA), the estimated solar radiative forcing values range from -59 to -22Wm-2 at the surface and from -24 to -1Wm-2 at the top of the atmosphere (TOA). Similarly, in the thermal spectral range these values range from +2 to +4Wm-2 for the surface and from +1 to +3Wm-2 for the TOA. Finally, the radiative forcing seems to be inversely proportional to the dust mixing ratio, since higher absolute values are estimated for less mixed dust layers. © Author(s) 2020
英文关键词	aerosol property; dust; geometry; lidar; mixing ratio; radiative forcing; zenith angle; Andalucia; Athens [Attica]; Attica; Basilicata; Cyprus; Granada [Andalucia]; Greece; Italy; Limassol; Potenza; Spain
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168908
作者单位	School of Applied Mathematics and Physical Sciences, Dept. of Physics, National Technical University of Athens, Athens, 15780, Greece; Department of Physics, Kuwait University, Safat, 13060, Kuwait; Department of Applied Physics, University of Granada, Granada, 18071, Spain; Andalusian Institute for Earth System Research, Granada, 18006, Spain; Consiglio Nazionale Delle Ricerche, Istituto di Metodologie per l'Analisi Ambientale, Tito Scalo, 85050, Italy; German Aerospace Center (DLR), German Remote Sensing Data Center (DFD), Wessling, Germany; Institute of Atmospheric Physics, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, 82234, Germany; Cyprus University of Technology, Dept. of Civil Engineering and Geomatics, Limassol, Cyprus; Eratosthenes Centre of Excellence, Limassol, Cyprus; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palaia Penteli, Athens, 15236, Greece
推荐引用方式 GB/T 7714	Soupiona O.,Papayannis A.,Kokkalis P.,et al. EARLINET observations of Saharan dust intrusions over the northern Mediterranean region (2014-2017): Properties and impact on radiative forcing[J],2020,20(23).
APA	Soupiona O..,Papayannis A..,Kokkalis P..,Foskinis R..,Sánchez Hernández G..,...&Psiloglou B..(2020).EARLINET observations of Saharan dust intrusions over the northern Mediterranean region (2014-2017): Properties and impact on radiative forcing.Atmospheric Chemistry and Physics,20(23).
MLA	Soupiona O.,et al."EARLINET observations of Saharan dust intrusions over the northern Mediterranean region (2014-2017): Properties and impact on radiative forcing".Atmospheric Chemistry and Physics 20.23(2020).