Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/8600
Title: Injection of mineral dust into the free troposphere during fire events observed with polarization lidar at Limassol, Cyprus
Authors: Nisantzi, Argyro 
Mamouri, Rodanthi-Elisavet 
Ansmann, Albert 
Hadjimitsis, Diofantos G. 
Major Field of Science: Engineering and Technology
Field Category: Environmental Engineering
Keywords: Soil dust;Troposphere;Fire events;Limassol;EARLINET polarization lidar;AERONET sun/sky photometer
Issue Date: 19-Nov-2014
Source: Atmospheric Chemistry and Physics,2014, vol. 14, no. 12, pp. 12155-12165
Volume: 14
Issue: 12
Start page: 12155
End page: 12165
Link: http://www.atmospheric-chemistry-and-physics.net/index.html
Project: ACTRIS PPP - Aerosols, Clouds and Trace gases Preparatory Phase Project 
Journal: Atmospheric Chemistry and Physics 
Abstract: Four-year observations (2010–2014) with EARLINET polarization lidar and AERONET sun/sky photometer at Limassol (34.7° N, 33° E), Cyprus, were used to study the soil dust content in lofted fire smoke plumes advected from Turkey. This first systematic attempt to characterize less than 3-day-old smoke plumes in terms of particle linear depolarization ratio (PDR), measured with lidar, contributes to the more general effort to properly describe the life cycle of free-tropospheric smoke–dust mixtures from the emission event to phases of long-range transport (> 4 days after emission). We found significant PDR differences with values from 9 to 18% in lofted aerosol layers when Turkish fires contributed to the aerosol burden and of 3–13 % when Turkish fires were absent. High Ångström exponents of 1.4–2.2 during all these events with lofted smoke layers, occurring between 1 and 3 km height, suggest the absence of a pronounced particle coarse mode. When plotted vs. travel time (spatial distance between Limassol and last fire area), PDR decreased strongly from initial values around 16–18% (1 day travel) to 4–8% after 4 days of travel caused by deposition processes. This behavior was found to be in close agreement with findings described in the literature. Computation of particle extinction coefficient and mass concentrations, derived from the lidar observations, separately for fine-mode dust, coarse-mode dust, and non-dust aerosol components show extinction-related dust fractions on the order of 10% (for PDR =4%, travel times > 4 days) and 50% (PDR =15%, 1 day travel time) and respective mass-related dust fractions of 25% (PDR =4%) to 80% (PDR =15%). Biomass burning should therefore be considered as another source of free tropospheric soil dust.
ISSN: 1680-7324
DOI: 10.5194/acp-14-12155-2014
Rights: © Copernicus
Type: Article
Affiliation : Cyprus University of Technology 
Leibniz Institute for Tropospheric Research 
Appears in Collections:Άρθρα/Articles

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