EARLINET observations of the Eyjafjallajökull ash plume over Greece

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dc.contributor.author Balis, D en
dc.contributor.author Giannakaki, E en
dc.contributor.author Mamouri, RE en
dc.contributor.author Kokkalis, P en
dc.contributor.author Papayannis, A en
dc.contributor.author Tsaknakis, G en
dc.date.accessioned 2014-03-01T02:52:39Z
dc.date.available 2014-03-01T02:52:39Z
dc.date.issued 2010 en
dc.identifier.issn 0277786X en
dc.identifier.uri http://hdl.handle.net/123456789/35977
dc.subject Aerosols en
dc.subject EARLINET en
dc.subject Eyjafjallajökull en
dc.subject Iceland en
dc.subject Raman lidar en
dc.subject.other Aerosol layers en
dc.subject.other Ash aerosol en
dc.subject.other Ash layer en
dc.subject.other Ash plumes en
dc.subject.other Central Europe en
dc.subject.other Complicated structures en
dc.subject.other EARLINET en
dc.subject.other Ground level en
dc.subject.other Icelands en
dc.subject.other Lidar measurements en
dc.subject.other Multiwavelength en
dc.subject.other Northern Italy en
dc.subject.other Raman LIDAR en
dc.subject.other Raman lidar system en
dc.subject.other Saharan dust en
dc.subject.other Southern Italy en
dc.subject.other Thessaloniki en
dc.subject.other Thin layers en
dc.subject.other Two layers en
dc.subject.other Variable thickness en
dc.subject.other Volcanic ash en
dc.subject.other Volcanic eruptions en
dc.subject.other Atmospheric aerosols en
dc.subject.other Atmospherics en
dc.subject.other Clouds en
dc.subject.other Optical properties en
dc.subject.other Optical radar en
dc.subject.other Remote sensing en
dc.subject.other Thin films en
dc.subject.other Volcanoes en
dc.title EARLINET observations of the Eyjafjallajökull ash plume over Greece en
heal.type conferenceItem en
heal.identifier.primary 10.1117/12.882450 en
heal.identifier.secondary http://dx.doi.org/10.1117/12.882450 en
heal.publicationDate 2010 en
heal.abstract The arrival of the volcanic ash plume of the Eyjafjallajökull eruption was observed over Greece almost one week after its major eruption (on April 14, 2010) with two multi-wavelength Raman lidar systems, members of the EARLINET network. Intensive lidar measurements were performed throughout the event over Thessaloniki and Athens to derive the optical properties of the ash aerosols in the troposphere. During April 21, 2010 two layers of volcanic ash were present over Thessaloniki, one around 2.5 and one around 5 km height after circulating over central Europe. The first layer was persistent but with variable thickness, while the thin layer observed at 5 km height disappeared after some hours. Later on and at higher altitudes thin layers of ash were observed between 5 and 8 km, directly associated with the volcanic eruption. The observed layer at around and 3 km was persistently observed till April 28. The volcanic ash was observed over Athens, after passing over Southern Italy, during April and May 2010, in two height regions: between 6-10 km height and between 4 km and the ground level. We found that this was directly linked to the maximum height of the emitted volcanic ash. The most intensive period for ash presence over Athens was between April 21 and 23. In most cases, ash layers were very well stratified in the form of filaments starting around 3-4 km down to 1.5 km height. Mixing of ash with locally produced aerosols was frequently observed during the measuring period resulting to enhanced PM10 concentrations at ground level. Volcanic ash was also observed during May 10-11 and 17-19, 2010, after being transported over Spain and Northern Italy. Both over Athens and Thessaloniki Saharan dust particles were mixed with volcanic ones on certain days of May 2010, which resulted to more complicated structures of the aerosol layers observed over Greece. en
heal.journalName Proceedings of SPIE - The International Society for Optical Engineering en
dc.identifier.doi 10.1117/12.882450 en
dc.identifier.volume 7827 en
dc.identifier.spage xlviii en
dc.identifier.epage lv en

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