{"id":3280,"date":"2021-03-29T11:54:48","date_gmt":"2021-03-29T11:54:48","guid":{"rendered":"https:\/\/www.icterra.pt\/?p=3280"},"modified":"2021-03-29T12:00:47","modified_gmt":"2021-03-29T12:00:47","slug":"characterization-of-forest-fire-and-saharan-desert-dust-aerosols-over-south-western-europe-using-a-multi-wavelength-raman-lidar-and-sun-photometer","status":"publish","type":"post","link":"https:\/\/www.icterra.pt\/legacy\/index.php\/2021\/03\/29\/characterization-of-forest-fire-and-saharan-desert-dust-aerosols-over-south-western-europe-using-a-multi-wavelength-raman-lidar-and-sun-photometer\/","title":{"rendered":"Characterization of forest fire and Saharan desert dust aerosols over south-western Europe using a multi-wavelength Raman lidar and Sun-photometer"},"content":{"rendered":"

Salgueiro, V., M. J. Costa, J. L. Guerrero-Rascado, F. T. Couto, D. Bortoli, 2021: Characterization of forest fire and Saharan desert dust aerosols over South-western Europe using a multi-wavelength Raman lidar and Sun-photometer. Atmospheric Environment, 118346.<\/span><\/p>\n

In the morning of 21 July 2019, a dense forest fire smoke plume was detected over \u00c9vora (Portugal) in the lower troposphere. Around 13:00 UTC, a Sahara dust layer was detected by\u00a0lidar<\/a>\u00a0between 3000 and 4000\u00a0m height above sea level. In this work results of these events using an EARLINET Raman lidar and\u00a0AERONET<\/a>\u00a0Sun-photometer measurements are reported and discussed: the dense smoke layer, the mixing of smoke with dust and the lofted dust layer that crossed \u00c9vora. During the morning, in-situ hourly mean black carbon concentration reached a maximum of 6.28\u00a0\u00b1\u00a00.73\u00a0\u03bcgm\u22123<\/sup>. The AERONET fine mode aerosol optical depth at 500\u00a0nm reached 0.77 and the \u00c5ngstr\u00f6m exponent at 440\u2013870\u00a0nm varied between 1.45 and 1.82, indicating the presence of fine smoke particles in the atmospheric column. In the beginning of the afternoon, the lidar profiles indicated the presence of a smoke layer followed by two thin layers of pollution mixed with dust and a lofted dust layer. The smoke particles caused low particle linear\u00a0depolarization<\/a>\u00a0ratios at 532\u00a0nm with mean value of 0.059\u00a0\u00b1\u00a00.002 in the smoke layer. In contrast, the lofted dust layer caused mean particle linear depolarization ratio at 532\u00a0nm of 0.26\u00a0\u00b1\u00a00.01. Mass concentrations were in the order of 22\u201329\u00a0\u03bcg\u00a0m\u22123<\/sup>\u00a0in the smoke layer and 60\u2013178\u00a0\u03bcg\u00a0m\u22123<\/sup>\u00a0in the lofted dust layer. During the afternoon and at night, mixing dust layers were identified by using lidar data. In the afternoon, two aerosol layers exhibited mean particle linear depolarization ratios at 532\u00a0nm of 0.23\u00a0\u00b1\u00a00.01 and 0.25\u00a0\u00b1<\/strong>\u00a00.01 with the dust dominating the extinction and mass concentration in both aerosol layers. Mass concentrations of dust were in the order of 101\u2013266\u00a0\u03bcg\u00a0m\u22123<\/sup>\u00a0and 159\u2013195\u00a0\u03bcg\u00a0m\u22123<\/sup>. At night, the particle linear depolarization ratio presented low variability across the identified layer with mean value of 0.20\u00a0\u00b1\u00a00.01. The \u00c5ngstr\u00f6m exponents were low, the mean lidar ratios were 50\u00a0\u00b1\u00a06 sr (355\u00a0nm) and 42\u00a0\u00b1\u00a04 sr (532\u00a0nm) and the aerosol optical depth was 0.32 (355\u00a0nm) and 0.30 (532\u00a0nm). Mass concentrations ranged in 10\u201328\u00a0\u03bcg\u00a0m\u22123<\/sup>\u00a0for non-dust and in 77\u2013186\u00a0\u03bcg\u00a0m\u22123<\/sup> for dust. Read the full article<\/a>.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Salgueiro, V., M. J. Costa, J. L. Guerrero-Rascado, F. T. Couto, D. Bortoli, 2021: Characterization of forest fire and Saharan desert dust aerosols over South-western Europe using a multi-wavelength Raman lidar and Sun-photometer. Atmospheric Environment, 118346. In the morning of 21 July 2019, a dense forest fire smoke plume was detected over \u00c9vora (Portugal) in […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[481,480,479,476,478,477],"_links":{"self":[{"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/posts\/3280"}],"collection":[{"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/comments?post=3280"}],"version-history":[{"count":2,"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/posts\/3280\/revisions"}],"predecessor-version":[{"id":3282,"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/posts\/3280\/revisions\/3282"}],"wp:attachment":[{"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/media?parent=3280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/categories?post=3280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.icterra.pt\/legacy\/index.php\/wp-json\/wp\/v2\/tags?post=3280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}