Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration
International audience We report airborne differential optical absorption spectroscopy (DOAS) measurements of aerosol extinction and NO 2 tropospheric profiles performed off the North coast of Norway in April 2008. The DOAS instrument was installed on the Safire ATR-42 aircraft during the POLARCAT-F...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , , , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://hal.science/hal-00590730 https://hal.science/hal-00590730/document https://hal.science/hal-00590730/file/acp-11-9219-2011.pdf https://doi.org/10.5194/acp-11-9219-2011 |
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ftclermontuniv:oai:HAL:hal-00590730v1 |
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openpolar |
institution |
Open Polar |
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HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) |
op_collection_id |
ftclermontuniv |
language |
English |
topic |
DOAS instrument Differential Optical Absorption Spectroscopy Troposphere POLARCAT Azote Dioxide Arctic [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
DOAS instrument Differential Optical Absorption Spectroscopy Troposphere POLARCAT Azote Dioxide Arctic [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Merlaud, A. van Roozendael, M. Theys, N. Fayt, C. Hermans, C. Quennehen, Boris Schwarzenboeck, Alfons Ancellet, Gérard Pommier, Matthieu Pelon, Jacques Burkhart, J. Stohl, A. de Mazière, M. Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration |
topic_facet |
DOAS instrument Differential Optical Absorption Spectroscopy Troposphere POLARCAT Azote Dioxide Arctic [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience We report airborne differential optical absorption spectroscopy (DOAS) measurements of aerosol extinction and NO 2 tropospheric profiles performed off the North coast of Norway in April 2008. The DOAS instrument was installed on the Safire ATR-42 aircraft during the POLARCAT-France spring campaign and recorded scattered light spectra in near-limb geometry using a scanning telescope. We use O 4 slant column measurements to derive the aerosol extinction at 360 nm. Regularization is based on the maximum a posteriori solution, for which we compare a linear and a logarithmic approach. The latter inherently constrains the solution to positive values and yields aerosol extinction profiles more consistent with independently measured size distributions. Two soundings are presented, performed on 8 April 2008 above 71° N, 22° E and on 9 April 2008 above 70° N, 17.8° E. The first profile shows aerosol extinction and NO 2 in the marine boundary layer with respective values of 0.04±0.005 km −1 and 1.9±0.3 × 109 molec cm −3 . A second extinction layer of 0.01±0.003 km −1 is found at 4 km altitude. During the second sounding, clouds prevented us to retrieve profile parts under 3 km altitude but a layer with enhanced extinction (0.025±0.005 km −1 ) and NO 2 (1.95±0.2 × 109 molec cm −3 ) is clearly detected at 4 km altitude. From CO and ozone in-situ measurements complemented by back-trajectories, we interpret the measurements in the free troposphere as, for the first sounding, a mix between stratospheric and polluted air from Northern Europe and for the second sounding, polluted air from Central Europe containing NO 2 . Considering the boundary layer measurements of the first flight, modeled source regions indicate closer sources, especially the Kola Peninsula smelters, which can explain the NO 2 enhancement not correlated with a CO increase at the same altitude. |
author2 |
Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB) Laboratoire de météorologie physique (LaMP) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Air Research (NILU) |
format |
Article in Journal/Newspaper |
author |
Merlaud, A. van Roozendael, M. Theys, N. Fayt, C. Hermans, C. Quennehen, Boris Schwarzenboeck, Alfons Ancellet, Gérard Pommier, Matthieu Pelon, Jacques Burkhart, J. Stohl, A. de Mazière, M. |
author_facet |
Merlaud, A. van Roozendael, M. Theys, N. Fayt, C. Hermans, C. Quennehen, Boris Schwarzenboeck, Alfons Ancellet, Gérard Pommier, Matthieu Pelon, Jacques Burkhart, J. Stohl, A. de Mazière, M. |
author_sort |
Merlaud, A. |
title |
Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration |
title_short |
Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration |
title_full |
Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration |
title_fullStr |
Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration |
title_full_unstemmed |
Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration |
title_sort |
airborne doas measurements in arctic: vertical distributions of aerosol extinction coefficient and no 2 concentration |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00590730 https://hal.science/hal-00590730/document https://hal.science/hal-00590730/file/acp-11-9219-2011.pdf https://doi.org/10.5194/acp-11-9219-2011 |
genre |
Arctic kola peninsula |
genre_facet |
Arctic kola peninsula |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00590730 Atmospheric Chemistry and Physics, 2011, 11 (17), pp.9219-9236. ⟨10.5194/acp-11-9219-2011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-11-9219-2011 hal-00590730 https://hal.science/hal-00590730 https://hal.science/hal-00590730/document https://hal.science/hal-00590730/file/acp-11-9219-2011.pdf doi:10.5194/acp-11-9219-2011 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-11-9219-2011 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
11 |
container_issue |
17 |
container_start_page |
9219 |
op_container_end_page |
9236 |
_version_ |
1799475198693474304 |
spelling |
ftclermontuniv:oai:HAL:hal-00590730v1 2024-05-19T07:36:09+00:00 Airborne DOAS measurements in Arctic: vertical distributions of aerosol extinction coefficient and NO 2 concentration Merlaud, A. van Roozendael, M. Theys, N. Fayt, C. Hermans, C. Quennehen, Boris Schwarzenboeck, Alfons Ancellet, Gérard Pommier, Matthieu Pelon, Jacques Burkhart, J. Stohl, A. de Mazière, M. Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB) Laboratoire de météorologie physique (LaMP) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Air Research (NILU) 2011 https://hal.science/hal-00590730 https://hal.science/hal-00590730/document https://hal.science/hal-00590730/file/acp-11-9219-2011.pdf https://doi.org/10.5194/acp-11-9219-2011 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-11-9219-2011 hal-00590730 https://hal.science/hal-00590730 https://hal.science/hal-00590730/document https://hal.science/hal-00590730/file/acp-11-9219-2011.pdf doi:10.5194/acp-11-9219-2011 info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00590730 Atmospheric Chemistry and Physics, 2011, 11 (17), pp.9219-9236. ⟨10.5194/acp-11-9219-2011⟩ DOAS instrument Differential Optical Absorption Spectroscopy Troposphere POLARCAT Azote Dioxide Arctic [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2011 ftclermontuniv https://doi.org/10.5194/acp-11-9219-2011 2024-04-21T23:43:19Z International audience We report airborne differential optical absorption spectroscopy (DOAS) measurements of aerosol extinction and NO 2 tropospheric profiles performed off the North coast of Norway in April 2008. The DOAS instrument was installed on the Safire ATR-42 aircraft during the POLARCAT-France spring campaign and recorded scattered light spectra in near-limb geometry using a scanning telescope. We use O 4 slant column measurements to derive the aerosol extinction at 360 nm. Regularization is based on the maximum a posteriori solution, for which we compare a linear and a logarithmic approach. The latter inherently constrains the solution to positive values and yields aerosol extinction profiles more consistent with independently measured size distributions. Two soundings are presented, performed on 8 April 2008 above 71° N, 22° E and on 9 April 2008 above 70° N, 17.8° E. The first profile shows aerosol extinction and NO 2 in the marine boundary layer with respective values of 0.04±0.005 km −1 and 1.9±0.3 × 109 molec cm −3 . A second extinction layer of 0.01±0.003 km −1 is found at 4 km altitude. During the second sounding, clouds prevented us to retrieve profile parts under 3 km altitude but a layer with enhanced extinction (0.025±0.005 km −1 ) and NO 2 (1.95±0.2 × 109 molec cm −3 ) is clearly detected at 4 km altitude. From CO and ozone in-situ measurements complemented by back-trajectories, we interpret the measurements in the free troposphere as, for the first sounding, a mix between stratospheric and polluted air from Northern Europe and for the second sounding, polluted air from Central Europe containing NO 2 . Considering the boundary layer measurements of the first flight, modeled source regions indicate closer sources, especially the Kola Peninsula smelters, which can explain the NO 2 enhancement not correlated with a CO increase at the same altitude. Article in Journal/Newspaper Arctic kola peninsula HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne) Atmospheric Chemistry and Physics 11 17 9219 9236 |