The potential of elastic and polarization lidars to retrieve extinction profiles
-
Published:2020-02-21
Issue:2
Volume:13
Page:893-905
-
ISSN:1867-8548
-
Container-title:Atmospheric Measurement Techniques
-
language:en
-
Short-container-title:Atmos. Meas. Tech.
Author:
Giannakaki Elina, Kokkalis Panos, Marinou EleniORCID, Bartsotas Nikolaos S., Amiridis VassilisORCID, Ansmann Albert, Komppula Mika
Abstract
Abstract. A new method, called ElEx (elastic extinction), is proposed for the estimation of extinction coefficient lidar profiles using only the information provided by the
elastic and polarization channels of a lidar system. The method is applicable to lidar measurements both during daytime and nighttime under
well-defined aerosol mixtures. ElEx uses the particle backscatter profiles at 532 nm and the vertically resolved particle linear
depolarization ratio measurements at the same wavelength. The particle linear depolarization ratio and the lidar ratio values of pure aerosol types
are also taken from literature. The total extinction profile is then estimated and compared well with Raman retrievals. In this study, ElEx was
applied in an aerosol mixture of marine and dust particles at Finokalia station during the CHARADMExp campaign. Any difference between ElEx and Raman
extinction profiles indicates that the nondust component could be probably attributed to polluted marine or polluted continental
aerosols. Comparison with sun photometer aerosol optical depth observations is performed as well during daytime. Differences in the total aerosol
optical depth are varying between 1.2 % and 72 %, and these differences are attributed to the limited ability of the lidar to correctly represent the aerosol
optical properties in the near range due to the overlap problem.
Funder
Academy of Finland
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference63 articles.
1. Althausen, D., Engelmann, R., Baars, H., Heese, B., Ansmann, A., and Müller, D.: Portable Raman lidar PollyXT for automated profiling
of aerosol backscatter, extinction, and depolarization, J. Atmos. Oceanic Technol., 26, 2366–2378, https://doi.org/10.1175/2009JTECHA1304.1, 2009. 2. Amiridis, V., Balis, D. S., Kazadzis, S., Bais, A., Giannakaki, E., Papayannis, A., and Zerefos, C.: Four-year aerosol observations with a
Raman lidar at Thessaloniki, Greece, in the framework of European Aerosol Research Lidar Network (EARLINET), J. Geophys. Res., 110, D21203,
https://doi.org/10.1029/2005JD006190, 2005. 3. Amiridis, V., Balis, D. S., Giannakaki, E., Stohl, A., Kazadzis, S., Koukouli, M. E., and Zanis, P.: Optical characteristics of biomass
burning aerosols over Southeastern Europe determined from UV-Raman lidar measurements, Atmos. Chem. Phys., 9, 2431–2440,
https://doi.org/10.5194/acp-9-2431-2009, 2009. 4. Ansmann, A., Wandinger, U., Riebesell, M., Weitkamp, C., and Michaelis, W.: Independent measurement of extinction and backscatter profiles
in cirrus clouds by using a combined Raman elastic-backscatter lidar, Appl. Opt., 31, 7113–7131, 1992. 5. Ansmann, A., Wagner, F., Althausen D., Müller, D., Herber, A., and Wandinger, U.: European pollution outbreaks during ACE 2: Lofted
aerosol plumes observed with Raman lidar at the Portuguese coast, J. Geophys. Res., 106, 20725–20733, 2001.
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|