Optical properties and vertical extension of aged ash layers over the Eastern Mediterranean as observed by Raman lidars during the Eyjafjallajökull eruption in May 2010

Papayannis, A; Mamouri, RE; Amiridis, V; Giannakaki, E; Veselovskii, I; Kokkalis, P; Tsaknakis, G; Balis, D; Kristiansen, NI; Stohl, A; Korenskiy, M; Allakhverdiev, K; Huseyinoglu, MF; Baykara, T

dc.contributor.author	Papayannis, A	en
dc.contributor.author	Mamouri, RE	en
dc.contributor.author	Amiridis, V	en
dc.contributor.author	Giannakaki, E	en
dc.contributor.author	Veselovskii, I	en
dc.contributor.author	Kokkalis, P	en
dc.contributor.author	Tsaknakis, G	en
dc.contributor.author	Balis, D	en
dc.contributor.author	Kristiansen, NI	en
dc.contributor.author	Stohl, A	en
dc.contributor.author	Korenskiy, M	en
dc.contributor.author	Allakhverdiev, K	en
dc.contributor.author	Huseyinoglu, MF	en
dc.contributor.author	Baykara, T	en
dc.date.accessioned	2014-03-01T02:11:50Z
dc.date.available	2014-03-01T02:11:50Z
dc.date.issued	2012	en
dc.identifier.issn	13522310	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29960
dc.subject	BSC-DREAM8b	en
dc.subject	EARLINET	en
dc.subject	Eyjafjallajökull	en
dc.subject	FLEXPART	en
dc.subject	HYSPLIT	en
dc.subject	Optical properties of volcanic ash	en
dc.subject	Raman lidar	en
dc.subject.other	BSC-DREAM8b	en
dc.subject.other	EARLINET	en
dc.subject.other	FLEXPART	en
dc.subject.other	HYSPLIT	en
dc.subject.other	Raman LIDAR	en
dc.subject.other	Atmospheric aerosols	en
dc.subject.other	Computer simulation	en
dc.subject.other	Dust	en
dc.subject.other	Optical radar	en
dc.subject.other	Volcanoes	en
dc.subject.other	Optical properties	en
dc.subject.other	dust	en
dc.subject.other	geometry	en
dc.subject.other	lidar	en
dc.subject.other	measurement method	en
dc.subject.other	numerical model	en
dc.subject.other	optical depth	en
dc.subject.other	optical property	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	volcanic ash	en
dc.subject.other	volcanic eruption	en
dc.subject.other	aerosol	en
dc.subject.other	article	en
dc.subject.other	depolarization	en
dc.subject.other	Greece	en
dc.subject.other	mineral dust	en
dc.subject.other	optical depth	en
dc.subject.other	particle size	en
dc.subject.other	priority journal	en
dc.subject.other	remote sensing	en
dc.subject.other	Turkey (republic)	en
dc.subject.other	volcanic ash	en
dc.subject.other	volcano	en
dc.subject.other	Eyjafjallajokull	en
dc.subject.other	Greece	en
dc.subject.other	Iceland	en
dc.subject.other	Turkey	en
dc.subject.other	Thessaloniki	en
dc.title	Optical properties and vertical extension of aged ash layers over the Eastern Mediterranean as observed by Raman lidars during the Eyjafjallajökull eruption in May 2010	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.atmosenv.2011.08.037	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.atmosenv.2011.08.037	en
heal.publicationDate	2012	en
heal.abstract	The vertical extension and the optical properties of aged ash layers advected from the Eyjafjallajökull volcanic eruption over the Eastern Mediterranean (Greece and Turkey) are presented for the period May 10-21, 2010. Raman lidar observations performed at three stations of EARLINET (Athens, Thessaloniki and Istanbul), provided clear ash signatures within certain layers, although ash was sometimes mixed with mineral dust advected from the Saharan region. AERONET columnar measurements did not indicate the presence of ash over the area for that period, although they did for the dust particles. This was further investigated and confirmed by simulations of the ash trajectories by the FLEXPART model and the BSC-DREAM8b dust model. Good agreement was found between simulated and observed geometrical characteristics of the ash and dust layers, respectively. Ash particles were observed over the lidar stations after 6-7-days transport from the volcanic source at height ranges between approximately 1.5 and 6km. Mean ash particle layer thickness ranged between 1.5 and 2.5km and the corresponding aerosol optical depth (AOD) was of the order of 0.12-0.06 at 355nm and of 0.04-0.05 at 532nm. Inside the ash layers, the lidar ratios (LR) ranged between 55 and 67sr at 355nm and 76-89sr at 532nm, while the particle linear depolarization ratio ranged between 10 and 25%. © 2011 Elsevier Ltd.	en
heal.journalName	Atmospheric Environment	en
dc.identifier.doi	10.1016/j.atmosenv.2011.08.037	en
dc.identifier.volume	48	en
dc.identifier.spage	56	en
dc.identifier.epage	65	en