380 research outputs found
Profiling of fine- and coarse-mode particles with LIRIC (LIdar/Radiometer Inversion Code)
No full textThe paper investigates numerical procedures that allow determining the dependence
on altitude of aerosol properties from multi wavelength elastic lidar signals. In particular,
the potential of the LIdar/Radiometer Inversion Code (LIRIC) to retrieve the ver-
5 tical profiles of fine and coarse-mode particles by combining 3-wavelength lidar measurements
and collocated AERONET (AErosol RObotic NETwork) sun/sky photometer
measurements is investigated
Lidar Characterization of vulcanic dust performed by the European Aerosol Research Lidar Network (EARLINET Project) during Etna's eruption
No full textLidar Characterization of vulcanic dust performed by the European Aerosol Research Lidar Network (EARLINET Project) during Etna's eruption
No full textVolcanic dust characterization by EARLINET during Etna's eruptions in 2001-2002 RID F-8484-2011 RID A-7951-2010 RID A-7535-2008
No full textLidar measurements were performed in the framework of the EARLINET project during the last eruptions
(July–August 2001 and November 2002) of the Etna volcano. Both aerosol backscattering and extinction coefficients show
the presence of remarkable aerosol layers in central and especially in southern Europe during the Etna eruptions periods.
The aerosol layer altitudes ranged from 1 to 6 km. Back-trajectory, lidar ratio and backscatter related Angstrom coefficient
analyses show that most of the aerosol layers originated from the Etna eruption and were made of sulfates and small
absorbing volcanic ash. Thanks to the EARLINET network, the space and temporal distributions of volcanic aerosol have
been studied over continental scale
Four-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET
No full textThe eruption of the Icelandic volcano Eyjafjallajökull in April–May 2010 represents a "natural experiment" to study the impact of volcanic emissions on a continental scale. For the first time, quantitative data about the presence, altitude, and layering of the volcanic cloud, in conjunction with optical information, are available for most parts of Europe derived from the observations by the European Aerosol Research Lidar NETwork (EARLINET). Based on multi-wavelength Raman lidar systems, EARLINET is the only instrument worldwide that is able to provide dense time series of high-quality optical data to be used for aerosol typing and for the retrieval of particle microphysical properties as a function of altitude. In this work we show the four-dimensional (4-D) distribution of the Eyjafjallajökull volcanic cloud in the troposphere over Europe as observed by EARLINET during the entire volcanic event (15 April–26 May 2010). All optical properties directly measured (backscatter, extinction, and particle linear depolarization ratio) are stored in the EARLINET database available at http://www.earlinet.org. A specific relational database providing the volcanic mask over Europe, realized ad hoc for this specific event, has been developed and is available on request at http://www.earlinet.org. During the first days after the eruption, volcanic particles were detected over Central Europe within a wide range of altitudes, from the upper troposphere down to the local planetary boundary layer (PBL). After 19 April 2010, volcanic particles were detected over southern and south-eastern Europe. During the first half of May (5–15 May), material emitted by the Eyjafjallajökull volcano was detected over Spain and Portugal and then over the Mediterranean and the Balkans. The last observations of the event were recorded until 25 May in Central Europe and in the Eastern Mediterranean area. The 4-D distribution of volcanic aerosol layering and optical properties on European scale reported here provides an unprecedented data set for evaluating satellite data and aerosol dispersion models for this kind of volcanic events
Volcanic dust characterization by EARLINET during Etna's eruptions in 2001-2002
No full textLidar measurements were performed in the framework of the EARLINET project during the last eruptions (July–August 2001 and November 2002) of the Etna volcano. Both aerosol backscattering and extinction coefficients show the presence of remarkable aerosol layers in central and especially in southern Europe during the Etna eruptions periods.
The aerosol layer altitudes ranged from 1 to 6 km. Back-trajectory, lidar ratio and backscatter related Angstrom coefficient analyses show that most of the aerosol layers originated from the Etna eruption and were made of sulfates and small absorbing volcanic ash. Thanks to the EARLINET network, the space and temporal distributions of volcanic aerosol have
been studied over continental scale
Two years of continuum observations of saharan dust events over the european continent using a coordinated lidar network in the frame of the EARLINET project
No full textReview and Revised Paper
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