Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic
Airborne lidar and in-situ measurements of the aerosol properties were conducted between Svalbard Island and Scandinavia in April 2008. Evidence of aerosol transport from Europe and Asia is given. The analysis of the aerosol optical properties based on a multiwavelength lidar (355, 532, 1064 nm) inc...
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ftcopernicus:oai:publications.copernicus.org:acp2485 2023-05-15T15:03:41+02:00 Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic Villiers, R. A. Ancellet, G. Pelon, J. Quennehen, B. Schwarzenboeck, A. Gayet, J. F. Law, K. S. 2018-01-15 application/pdf https://doi.org/10.5194/acp-10-5011-2010 https://www.atmos-chem-phys.net/10/5011/2010/ eng eng doi:10.5194/acp-10-5011-2010 https://www.atmos-chem-phys.net/10/5011/2010/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-10-5011-2010 2019-12-24T09:57:23Z Airborne lidar and in-situ measurements of the aerosol properties were conducted between Svalbard Island and Scandinavia in April 2008. Evidence of aerosol transport from Europe and Asia is given. The analysis of the aerosol optical properties based on a multiwavelength lidar (355, 532, 1064 nm) including volume depolarization at 355 nm aims at distinguishing the role of the different aerosol sources (Siberian wild fires, Eastern Asia and European anthropogenic emissions). Combining, first aircraft measurements, second FLEXPART simulations with a calculation of the PBL air fraction originating from the three different mid-latitude source regions, and third level-2 CALIPSO data products (i.e. backscatter coefficient 532 nm,volume depolarization and color ratio between 1064 and 532 nm in aerosol layers) along the transport pathways, appears a valuable approach to identify the role of the different aerosol sources even after a transport time larger than 4 days. Optical depth of the aerosol layers are always rather small (<4%) while transported over the Arctic and ratio of the total attenuated backscatter (i.e. including molecular contribution) provide more stable result than conventional aerosol backscatter ratio. Above Asia, CALIPSO data indicate more depolarization (up to 15%) and largest color ratio (>0.5) for the northeastern Asia emissions (i.e. an expected mixture of Asian pollution and dust), while low depolarization together with smaller and quasi constant color ratio (≈0.3) are observed for the Siberian biomass burning emissions. A similar difference is visible between two layers observed by the aircraft above Scandinavia. The analysis of the time evolution of the aerosol optical properties revealed by CALIPSO between Asia and Scandinavia shows a gradual decrease of the aerosol backscatter, depolarization ratio and color ratio which suggests the removal of the largest particles in the accumulation mode. A similar study conducted for a European plume has shown aerosol optical properties intermediate between the two Asian sources with color ratio never exceeding 0.4 and moderate depolarization ratio being always less than 8%, i.e. less aerosol from the accumulation mode. Text Arctic Svalbard Copernicus Publications: E-Journals Arctic Svalbard Atmospheric Chemistry and Physics 10 11 5011 5030 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Airborne lidar and in-situ measurements of the aerosol properties were conducted between Svalbard Island and Scandinavia in April 2008. Evidence of aerosol transport from Europe and Asia is given. The analysis of the aerosol optical properties based on a multiwavelength lidar (355, 532, 1064 nm) including volume depolarization at 355 nm aims at distinguishing the role of the different aerosol sources (Siberian wild fires, Eastern Asia and European anthropogenic emissions). Combining, first aircraft measurements, second FLEXPART simulations with a calculation of the PBL air fraction originating from the three different mid-latitude source regions, and third level-2 CALIPSO data products (i.e. backscatter coefficient 532 nm,volume depolarization and color ratio between 1064 and 532 nm in aerosol layers) along the transport pathways, appears a valuable approach to identify the role of the different aerosol sources even after a transport time larger than 4 days. Optical depth of the aerosol layers are always rather small (<4%) while transported over the Arctic and ratio of the total attenuated backscatter (i.e. including molecular contribution) provide more stable result than conventional aerosol backscatter ratio. Above Asia, CALIPSO data indicate more depolarization (up to 15%) and largest color ratio (>0.5) for the northeastern Asia emissions (i.e. an expected mixture of Asian pollution and dust), while low depolarization together with smaller and quasi constant color ratio (≈0.3) are observed for the Siberian biomass burning emissions. A similar difference is visible between two layers observed by the aircraft above Scandinavia. The analysis of the time evolution of the aerosol optical properties revealed by CALIPSO between Asia and Scandinavia shows a gradual decrease of the aerosol backscatter, depolarization ratio and color ratio which suggests the removal of the largest particles in the accumulation mode. A similar study conducted for a European plume has shown aerosol optical properties intermediate between the two Asian sources with color ratio never exceeding 0.4 and moderate depolarization ratio being always less than 8%, i.e. less aerosol from the accumulation mode. |
format |
Text |
author |
Villiers, R. A. Ancellet, G. Pelon, J. Quennehen, B. Schwarzenboeck, A. Gayet, J. F. Law, K. S. |
spellingShingle |
Villiers, R. A. Ancellet, G. Pelon, J. Quennehen, B. Schwarzenboeck, A. Gayet, J. F. Law, K. S. Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic |
author_facet |
Villiers, R. A. Ancellet, G. Pelon, J. Quennehen, B. Schwarzenboeck, A. Gayet, J. F. Law, K. S. |
author_sort |
Villiers, R. A. |
title |
Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic |
title_short |
Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic |
title_full |
Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic |
title_fullStr |
Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic |
title_full_unstemmed |
Airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the Arctic |
title_sort |
airborne measurements of aerosol optical properties related to early spring transport of mid-latitude sources into the arctic |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-10-5011-2010 https://www.atmos-chem-phys.net/10/5011/2010/ |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Svalbard |
genre_facet |
Arctic Svalbard |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-10-5011-2010 https://www.atmos-chem-phys.net/10/5011/2010/ |
op_doi |
https://doi.org/10.5194/acp-10-5011-2010 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
10 |
container_issue |
11 |
container_start_page |
5011 |
op_container_end_page |
5030 |
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1766335541434908672 |