The potential of elastic and polarization lidars to retrieve extinction profiles
<p>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 nigh...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2020-02-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/13/893/2020/amt-13-893-2020.pdf |
| _version_ | 1828450755742269440 |
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| author | E. Giannakaki E. Giannakaki P. Kokkalis P. Kokkalis E. Marinou E. Marinou N. S. Bartsotas V. Amiridis A. Ansmann M. Komppula |
| author_facet | E. Giannakaki E. Giannakaki P. Kokkalis P. Kokkalis E. Marinou E. Marinou N. S. Bartsotas V. Amiridis A. Ansmann M. Komppula |
| author_sort | E. Giannakaki |
| collection | DOAJ |
| description | <p>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 <span class="inline-formula">nm</span> 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.</p> |
| first_indexed | 2024-12-10T23:27:43Z |
| format | Article |
| id | doaj.art-136bd650236848fb828804f59e223aba |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-12-10T23:27:43Z |
| publishDate | 2020-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-136bd650236848fb828804f59e223aba2022-12-22T01:29:32ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482020-02-011389390510.5194/amt-13-893-2020The potential of elastic and polarization lidars to retrieve extinction profilesE. Giannakaki0E. Giannakaki1P. Kokkalis2P. Kokkalis3E. Marinou4E. Marinou5N. S. Bartsotas6V. Amiridis7A. Ansmann8M. Komppula9Department of Environmental Physics and Meteorology, University of Athens, Athens 15784, GreeceFinnish Meteorological Institute, Atmospheric Research Centre of Eastern Finland, Kuopio, 70211, FinlandPhysics Department, Faculty of Science, Kuwait University, Kuwait City, KuwaitInstitute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens 15236, GreeceInstitute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens 15236, GreeceInstitute of Atmospheric Physics, German Aerospace Center (DLR), 82234 Oberpfaffenhofen, GermanyAtmospheric Modeling and Weather Forecasting Group, Department of Physics, National and Kapodistrian University of Athens, Athens, GreeceInstitute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens 15236, GreeceLeibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, GermanyFinnish Meteorological Institute, Atmospheric Research Centre of Eastern Finland, Kuopio, 70211, Finland<p>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 <span class="inline-formula">nm</span> 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.</p>https://www.atmos-meas-tech.net/13/893/2020/amt-13-893-2020.pdf |
| spellingShingle | E. Giannakaki E. Giannakaki P. Kokkalis P. Kokkalis E. Marinou E. Marinou N. S. Bartsotas V. Amiridis A. Ansmann M. Komppula The potential of elastic and polarization lidars to retrieve extinction profiles Atmospheric Measurement Techniques |
| title | The potential of elastic and polarization lidars to retrieve extinction profiles |
| title_full | The potential of elastic and polarization lidars to retrieve extinction profiles |
| title_fullStr | The potential of elastic and polarization lidars to retrieve extinction profiles |
| title_full_unstemmed | The potential of elastic and polarization lidars to retrieve extinction profiles |
| title_short | The potential of elastic and polarization lidars to retrieve extinction profiles |
| title_sort | potential of elastic and polarization lidars to retrieve extinction profiles |
| url | https://www.atmos-meas-tech.net/13/893/2020/amt-13-893-2020.pdf |
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