Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACE
<p>The Saharan Aerosol Long-Range Transport and Aerosol–Cloud-Interaction Experiment (SALTRACE) was devoted to the investigation of Saharan dust properties over the Caribbean. The campaign took place in June–July 2013. A wide set of ground-based and airborne aerosol instrumentation was deploye...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-12-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/19/14571/2019/acp-19-14571-2019.pdf |
| _version_ | 1819130545739661312 |
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| author | C. Toledano B. Torres C. Velasco-Merino D. Althausen S. Groß M. Wiegner B. Weinzierl J. Gasteiger A. Ansmann R. González D. Mateos D. Farrel T. Müller M. Haarig V. E. Cachorro |
| author_facet | C. Toledano B. Torres C. Velasco-Merino D. Althausen S. Groß M. Wiegner B. Weinzierl J. Gasteiger A. Ansmann R. González D. Mateos D. Farrel T. Müller M. Haarig V. E. Cachorro |
| author_sort | C. Toledano |
| collection | DOAJ |
| description | <p>The Saharan Aerosol Long-Range Transport and Aerosol–Cloud-Interaction Experiment (SALTRACE) was devoted to the investigation of Saharan dust properties over the Caribbean. The campaign took place in June–July 2013. A wide set of ground-based and airborne aerosol instrumentation was deployed at the island of Barbados for a comprehensive experiment. Several sun photometers performed measurements during this campaign: two AERONET (Aerosol Robotic Network) Cimel sun photometers and the Sun and Sky Automatic Radiometer (SSARA). The sun photometers were co-located with the ground-based multi-wavelength lidars BERTHA (Backscatter Extinction lidar Ratio Temperature Humidity profiling Apparatus) and POLIS (Portable Lidar System). Aerosol properties derived from direct sun and sky radiance observations are analyzed, and a comparison with the co-located lidar and in situ data is provided. The time series of aerosol optical depth (AOD) allows identifying successive dust events with short periods in between in which the marine background conditions were observed. The moderate aerosol optical depth in the range of 0.3 to 0.6 was found during the dust periods. The sun photometer infrared channel at the 1640 nm wavelength was used in the retrieval to investigate possible improvements to aerosol size retrievals, and it was expected to have a larger sensitivity to coarse particles. The comparison between column (aerosol optical depth) and surface (dust concentration) data demonstrates the connection between the Saharan Air Layer and the boundary layer in the Caribbean region, as is shown by the synchronized detection of the successive dust events in both datasets. However the differences of size distributions derived from sun photometer data and in situ observations reveal the difficulties in carrying out a column closure study.</p> |
| first_indexed | 2024-12-22T09:01:19Z |
| format | Article |
| id | doaj.art-0094f36ee15044b39b187269d7153efa |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-22T09:01:19Z |
| publishDate | 2019-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-0094f36ee15044b39b187269d7153efa2022-12-21T18:31:43ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242019-12-0119145711458310.5194/acp-19-14571-2019Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACEC. Toledano0B. Torres1C. Velasco-Merino2D. Althausen3S. Groß4M. Wiegner5B. Weinzierl6J. Gasteiger7A. Ansmann8R. González9D. Mateos10D. Farrel11T. Müller12M. Haarig13V. E. Cachorro14Atmospheric Optics Group, University of Valladolid, Valladolid, SpainLaboratory of Atmospheric Optics, University of Lille, Villeneuve-d'Ascq, FranceAtmospheric Optics Group, University of Valladolid, Valladolid, SpainLeibniz Institute for Tropospheric Research, Leipzig, GermanyInstitute of Atmospheric Physics, German Aerospace Center, Oberpfaffenhofen, GermanyMeteorological Institute Munich, Ludwig-Maximilians-Universität München, Munich, GermanyAerosol Physics and Environmental Physics, University of Vienna, Vienna, AustriaAerosol Physics and Environmental Physics, University of Vienna, Vienna, AustriaLeibniz Institute for Tropospheric Research, Leipzig, GermanyAtmospheric Optics Group, University of Valladolid, Valladolid, SpainAtmospheric Optics Group, University of Valladolid, Valladolid, SpainCaribbean Institute for Meteorology and Hydrology, Bridgetown, BarbadosLeibniz Institute for Tropospheric Research, Leipzig, GermanyLeibniz Institute for Tropospheric Research, Leipzig, GermanyAtmospheric Optics Group, University of Valladolid, Valladolid, Spain<p>The Saharan Aerosol Long-Range Transport and Aerosol–Cloud-Interaction Experiment (SALTRACE) was devoted to the investigation of Saharan dust properties over the Caribbean. The campaign took place in June–July 2013. A wide set of ground-based and airborne aerosol instrumentation was deployed at the island of Barbados for a comprehensive experiment. Several sun photometers performed measurements during this campaign: two AERONET (Aerosol Robotic Network) Cimel sun photometers and the Sun and Sky Automatic Radiometer (SSARA). The sun photometers were co-located with the ground-based multi-wavelength lidars BERTHA (Backscatter Extinction lidar Ratio Temperature Humidity profiling Apparatus) and POLIS (Portable Lidar System). Aerosol properties derived from direct sun and sky radiance observations are analyzed, and a comparison with the co-located lidar and in situ data is provided. The time series of aerosol optical depth (AOD) allows identifying successive dust events with short periods in between in which the marine background conditions were observed. The moderate aerosol optical depth in the range of 0.3 to 0.6 was found during the dust periods. The sun photometer infrared channel at the 1640 nm wavelength was used in the retrieval to investigate possible improvements to aerosol size retrievals, and it was expected to have a larger sensitivity to coarse particles. The comparison between column (aerosol optical depth) and surface (dust concentration) data demonstrates the connection between the Saharan Air Layer and the boundary layer in the Caribbean region, as is shown by the synchronized detection of the successive dust events in both datasets. However the differences of size distributions derived from sun photometer data and in situ observations reveal the difficulties in carrying out a column closure study.</p>https://www.atmos-chem-phys.net/19/14571/2019/acp-19-14571-2019.pdf |
| spellingShingle | C. Toledano B. Torres C. Velasco-Merino D. Althausen S. Groß M. Wiegner B. Weinzierl J. Gasteiger A. Ansmann R. González D. Mateos D. Farrel T. Müller M. Haarig V. E. Cachorro Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACE Atmospheric Chemistry and Physics |
| title | Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACE |
| title_full | Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACE |
| title_fullStr | Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACE |
| title_full_unstemmed | Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACE |
| title_short | Sun photometer retrievals of Saharan dust properties over Barbados during SALTRACE |
| title_sort | sun photometer retrievals of saharan dust properties over barbados during saltrace |
| url | https://www.atmos-chem-phys.net/19/14571/2019/acp-19-14571-2019.pdf |
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