Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties
The accuracy of space-based nitrogen dioxide (NO 2 ) retrievals from solar backscatter radiances critically depends on a priori knowledge of the vertical profiles of NO 2 and aerosol optical properties. This information is used to calculate an air mass factor (AMF), which accounts for atmospheric sc...
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ftdoajarticles:oai:doaj.org/article:c960631b2d0b4827831f89452e4ae5b5 2023-05-15T15:18:04+02:00 Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties N. Bousserez 2014-10-01T00:00:00Z https://doi.org/10.5194/amt-7-3431-2014 https://doaj.org/article/c960631b2d0b4827831f89452e4ae5b5 EN eng Copernicus Publications http://www.atmos-meas-tech.net/7/3431/2014/amt-7-3431-2014.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 1867-1381 1867-8548 doi:10.5194/amt-7-3431-2014 https://doaj.org/article/c960631b2d0b4827831f89452e4ae5b5 Atmospheric Measurement Techniques, Vol 7, Iss 10, Pp 3431-3444 (2014) Environmental engineering TA170-171 Earthwork. Foundations TA715-787 article 2014 ftdoajarticles https://doi.org/10.5194/amt-7-3431-2014 2022-12-31T14:41:36Z The accuracy of space-based nitrogen dioxide (NO 2 ) retrievals from solar backscatter radiances critically depends on a priori knowledge of the vertical profiles of NO 2 and aerosol optical properties. This information is used to calculate an air mass factor (AMF), which accounts for atmospheric scattering and is used to convert the measured line-of-sight "slant" columns into vertical columns. In this study we investigate the impact of biomass burning emissions on the AMF in order to quantify NO 2 retrieval errors in the Ozone Monitoring Instrument (OMI) products over these sources. Sensitivity analyses are conducted using the Linearized Discrete Ordinate Radiative Transfer (LIDORT) model. The NO 2 and aerosol profiles are obtained from a 3-D chemistry-transport model (GEOS-Chem), which uses the Fire Locating and Monitoring of Burning Emissions (FLAMBE) daily biomass burning emission inventory. Aircraft in situ data collected during two field campaigns, the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) and the Dust and Biomass-burning Experiment (DABEX), are used to evaluate the modeled aerosol optical properties and NO 2 profiles over Canadian boreal fires and West African savanna fires, respectively. Over both domains, the effect of biomass burning emissions on the AMF through the modified NO 2 shape factor can be as high as −60%. A sensitivity analysis also revealed that the effect of aerosol and shape factor perturbations on the AMF is very sensitive to surface reflectance and clouds. As an illustration, the aerosol correction can range from −20 to +100% for different surface reflectances, while the shape factor correction varies from −70 to −20%. Although previous studies have shown that in clear-sky conditions the effect of aerosols on the AMF was in part implicitly accounted for by the modified cloud parameters, here it is suggested that when clouds are present above a surface layer of scattering aerosols, an explicit aerosol correction would be beneficial to ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Atmospheric Measurement Techniques 7 10 3431 3444 |
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Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
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Environmental engineering TA170-171 Earthwork. Foundations TA715-787 N. Bousserez Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties |
topic_facet |
Environmental engineering TA170-171 Earthwork. Foundations TA715-787 |
description |
The accuracy of space-based nitrogen dioxide (NO 2 ) retrievals from solar backscatter radiances critically depends on a priori knowledge of the vertical profiles of NO 2 and aerosol optical properties. This information is used to calculate an air mass factor (AMF), which accounts for atmospheric scattering and is used to convert the measured line-of-sight "slant" columns into vertical columns. In this study we investigate the impact of biomass burning emissions on the AMF in order to quantify NO 2 retrieval errors in the Ozone Monitoring Instrument (OMI) products over these sources. Sensitivity analyses are conducted using the Linearized Discrete Ordinate Radiative Transfer (LIDORT) model. The NO 2 and aerosol profiles are obtained from a 3-D chemistry-transport model (GEOS-Chem), which uses the Fire Locating and Monitoring of Burning Emissions (FLAMBE) daily biomass burning emission inventory. Aircraft in situ data collected during two field campaigns, the Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) and the Dust and Biomass-burning Experiment (DABEX), are used to evaluate the modeled aerosol optical properties and NO 2 profiles over Canadian boreal fires and West African savanna fires, respectively. Over both domains, the effect of biomass burning emissions on the AMF through the modified NO 2 shape factor can be as high as −60%. A sensitivity analysis also revealed that the effect of aerosol and shape factor perturbations on the AMF is very sensitive to surface reflectance and clouds. As an illustration, the aerosol correction can range from −20 to +100% for different surface reflectances, while the shape factor correction varies from −70 to −20%. Although previous studies have shown that in clear-sky conditions the effect of aerosols on the AMF was in part implicitly accounted for by the modified cloud parameters, here it is suggested that when clouds are present above a surface layer of scattering aerosols, an explicit aerosol correction would be beneficial to ... |
format |
Article in Journal/Newspaper |
author |
N. Bousserez |
author_facet |
N. Bousserez |
author_sort |
N. Bousserez |
title |
Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties |
title_short |
Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties |
title_full |
Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties |
title_fullStr |
Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties |
title_full_unstemmed |
Space-based retrieval of NO 2 over biomass burning regions: quantifying and reducing uncertainties |
title_sort |
space-based retrieval of no 2 over biomass burning regions: quantifying and reducing uncertainties |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/amt-7-3431-2014 https://doaj.org/article/c960631b2d0b4827831f89452e4ae5b5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Measurement Techniques, Vol 7, Iss 10, Pp 3431-3444 (2014) |
op_relation |
http://www.atmos-meas-tech.net/7/3431/2014/amt-7-3431-2014.pdf https://doaj.org/toc/1867-1381 https://doaj.org/toc/1867-8548 1867-1381 1867-8548 doi:10.5194/amt-7-3431-2014 https://doaj.org/article/c960631b2d0b4827831f89452e4ae5b5 |
op_doi |
https://doi.org/10.5194/amt-7-3431-2014 |
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Atmospheric Measurement Techniques |
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7 |
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10 |
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3431 |
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3444 |
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