Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008)
Developing predictive capability for future atmospheric oxidation capacity requires a detailed analysis of model uncertainties and sensitivity of the modeled oxidation capacity to model input variables. Using oxidant mixing ratios modeled by the GEOS-Chem chemical transport model and measured on the...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2017
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-17-3769-2017 https://doaj.org/article/c817ecba48424239acfd8dbf484f9982 |
id |
ftdoajarticles:oai:doaj.org/article:c817ecba48424239acfd8dbf484f9982 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:c817ecba48424239acfd8dbf484f9982 2023-05-15T15:00:47+02:00 Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008) K. E. Christian W. H. Brune J. Mao 2017-03-01T00:00:00Z https://doi.org/10.5194/acp-17-3769-2017 https://doaj.org/article/c817ecba48424239acfd8dbf484f9982 EN eng Copernicus Publications http://www.atmos-chem-phys.net/17/3769/2017/acp-17-3769-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-17-3769-2017 https://doaj.org/article/c817ecba48424239acfd8dbf484f9982 Atmospheric Chemistry and Physics, Vol 17, Iss 5, Pp 3769-3784 (2017) Physics QC1-999 Chemistry QD1-999 article 2017 ftdoajarticles https://doi.org/10.5194/acp-17-3769-2017 2022-12-31T15:24:03Z Developing predictive capability for future atmospheric oxidation capacity requires a detailed analysis of model uncertainties and sensitivity of the modeled oxidation capacity to model input variables. Using oxidant mixing ratios modeled by the GEOS-Chem chemical transport model and measured on the NASA DC-8 aircraft, uncertainty and global sensitivity analyses were performed on the GEOS-Chem chemical transport model for the modeled oxidants hydroxyl (OH), hydroperoxyl (HO 2 ), and ozone (O 3 ). The sensitivity of modeled OH, HO 2 , and ozone to model inputs perturbed simultaneously within their respective uncertainties were found for the flight tracks of NASA's Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) A and B campaigns (2008) in the North American Arctic. For the spring deployment (ARCTAS-A), ozone was most sensitive to the photolysis rate of NO 2 , the NO 2 + OH reaction rate, and various emissions, including methyl bromoform (CHBr 3 ). OH and HO 2 were overwhelmingly sensitive to aerosol particle uptake of HO 2 with this one factor contributing upwards of 75 % of the uncertainty in HO 2 . For the summer deployment (ARCTAS-B), ozone was most sensitive to emission factors, such as soil NO x and isoprene. OH and HO 2 were most sensitive to biomass emissions and aerosol particle uptake of HO 2 . With modeled HO 2 showing a factor of 2 underestimation compared to measurements in the lowest 2 km of the troposphere, lower uptake rates ( γ HO 2 < 0. 055), regardless of whether or not the product of the uptake is H 2 O or H 2 O 2 , produced better agreement between modeled and measured HO 2 . Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Atmospheric Chemistry and Physics 17 5 3769 3784 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 K. E. Christian W. H. Brune J. Mao Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008) |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Developing predictive capability for future atmospheric oxidation capacity requires a detailed analysis of model uncertainties and sensitivity of the modeled oxidation capacity to model input variables. Using oxidant mixing ratios modeled by the GEOS-Chem chemical transport model and measured on the NASA DC-8 aircraft, uncertainty and global sensitivity analyses were performed on the GEOS-Chem chemical transport model for the modeled oxidants hydroxyl (OH), hydroperoxyl (HO 2 ), and ozone (O 3 ). The sensitivity of modeled OH, HO 2 , and ozone to model inputs perturbed simultaneously within their respective uncertainties were found for the flight tracks of NASA's Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) A and B campaigns (2008) in the North American Arctic. For the spring deployment (ARCTAS-A), ozone was most sensitive to the photolysis rate of NO 2 , the NO 2 + OH reaction rate, and various emissions, including methyl bromoform (CHBr 3 ). OH and HO 2 were overwhelmingly sensitive to aerosol particle uptake of HO 2 with this one factor contributing upwards of 75 % of the uncertainty in HO 2 . For the summer deployment (ARCTAS-B), ozone was most sensitive to emission factors, such as soil NO x and isoprene. OH and HO 2 were most sensitive to biomass emissions and aerosol particle uptake of HO 2 . With modeled HO 2 showing a factor of 2 underestimation compared to measurements in the lowest 2 km of the troposphere, lower uptake rates ( γ HO 2 < 0. 055), regardless of whether or not the product of the uptake is H 2 O or H 2 O 2 , produced better agreement between modeled and measured HO 2 . |
format |
Article in Journal/Newspaper |
author |
K. E. Christian W. H. Brune J. Mao |
author_facet |
K. E. Christian W. H. Brune J. Mao |
author_sort |
K. E. Christian |
title |
Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008) |
title_short |
Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008) |
title_full |
Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008) |
title_fullStr |
Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008) |
title_full_unstemmed |
Global sensitivity analysis of the GEOS-Chem chemical transport model: ozone and hydrogen oxides during ARCTAS (2008) |
title_sort |
global sensitivity analysis of the geos-chem chemical transport model: ozone and hydrogen oxides during arctas (2008) |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/acp-17-3769-2017 https://doaj.org/article/c817ecba48424239acfd8dbf484f9982 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 17, Iss 5, Pp 3769-3784 (2017) |
op_relation |
http://www.atmos-chem-phys.net/17/3769/2017/acp-17-3769-2017.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-17-3769-2017 https://doaj.org/article/c817ecba48424239acfd8dbf484f9982 |
op_doi |
https://doi.org/10.5194/acp-17-3769-2017 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
17 |
container_issue |
5 |
container_start_page |
3769 |
op_container_end_page |
3784 |
_version_ |
1766332852865073152 |