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Title: Aerosol optical properties variability during biomass burning events observed by the eole-aias depolarization lidars over Athens, Greece (2007-2016)
Authors: Mylonaki, Maria 
Papayannis, Alexandros 
Mamouri, Rodanthi-Elisavet 
Argyrouli, Athina 
Kokkalis, Panagiotis 
Tsaknakis, Georgios 
Soupiona, Ourania 
Keywords: Lidar ratio;Biomass;Aerosol;Atmospheric emissions
Category: Earth and Related Environmental Sciences
Field: Natural Sciences
Issue Date: 13-Apr-2018
Publisher: EDP Sciences
Source: EPJ Web of Conferences, 2018, Volume 176, Article number 05022
Abstract: The EOLE multi-wavelength aerosol Ramandepolarization lidar, and the AIAS depolarization lidar, in synergy with a sun photometer (CIMEL), were used, in the period 2007-2016, to provide the vertical profiles of the aerosol optical properties over Athens, Greece. More than 30 biomass burning events (fresh and aged smoke particles) were observed, with smoke layers between 1.5 up to 4-5 km height, while their duration ranged from 1-3 days. Lidar ratio (LR) values ranged from 40-105 sr (at 355 nm) and from 40-100 sr (at 532 nm), while the linear particle depolarization ratio (LPDR) at both 355 and 532 nm, remained <7%. The extinction-related Ångström exponent (AEa) at 355 nm/532 nm) ranged from 0.3 to 2.1. Additionally, a case of a near-range transport of biomass burning aerosols arriving over Athens up to 4 km height, between 27 and 28 June 2016, was studied. For this case, we found LRs of the order of 70±5 sr (355 nm) and 65±15 sr (532 nm) and AEa(355 nm/532 nm) around 1.
Description: Presented at 28th International Laser Radar Conference, 2017, Bucharest, Romania, 25-30 June
ISSN: 21016275
Rights: © The Authors, published by EDP Sciences, 2018.
Type: Article
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