Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE
Within the framework of the Network for Detection of Atmospheric Composition Change (NDACC), regular ground-based Fourier transform infrared (FTIR) measurements of many species are performed at several locations. Inversion schemes provide vertical profile information and characterization of the retr...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00048665 2023-05-15T17:04:22+02:00 Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE Vigouroux, C. De Mazière, M. Errera, Q. Chabrillat, S. Mahieu, E. Duchatelet, P. Wood, S. Smale, D. Mikuteit, S. Blumenstock, T. Hase, F. Jones, N. 2007-01 electronic https://doi.org/10.5194/acp-7-377-2007 https://noa.gwlb.de/receive/cop_mods_00048665 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048285/acp-7-377-2007.pdf https://acp.copernicus.org/articles/7/377/2007/acp-7-377-2007.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-7-377-2007 https://noa.gwlb.de/receive/cop_mods_00048665 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048285/acp-7-377-2007.pdf https://acp.copernicus.org/articles/7/377/2007/acp-7-377-2007.pdf https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2007 ftnonlinearchiv https://doi.org/10.5194/acp-7-377-2007 2022-02-08T22:37:53Z Within the framework of the Network for Detection of Atmospheric Composition Change (NDACC), regular ground-based Fourier transform infrared (FTIR) measurements of many species are performed at several locations. Inversion schemes provide vertical profile information and characterization of the retrieved products which are therefore relevant for contributing to the validation of MIPAS profiles in the stratosphere and upper troposphere. We have focused on the species HNO3 and N2O at 5 NDACC-sites distributed in both hemispheres, i.e., Jungfraujoch (46.5° N) and Kiruna (68° N) for the northern hemisphere, and Wollongong (34° S), Lauder (45° S) and Arrival Heights (78° S) for the southern hemisphere. These ground-based data have been compared with MIPAS offline profiles (v4.61) for the year 2003, collocated within 1000 km around the stations, in the lower to middle stratosphere. To get around the spatial collocation problem, comparisons have also been made between the same ground-based FTIR data and the corresponding profiles resulting from the stratospheric 4D-VAR data assimilation system BASCOE constrained by MIPAS data. This paper discusses the results of the comparisons and the usefullness of using BASCOE profiles as proxies for MIPAS data. It shows good agreement between MIPAS and FTIR N2O partial columns: the biases are below 5% for all the stations and the standard deviations are below 7% for the three mid-latitude stations, and below 10% for the high latitude ones. The comparisons with BASCOE partial columns give standard deviations below 4% for the mid-latitude stations to less than 8% for the high latitude ones. After making some corrections to take into account the known bias due to the use of different spectroscopic parameters, the comparisons of HNO3 partial columns show biases below 3% and standard deviations below 15% for all the stations except Arrival Heights (bias of 5%, standard deviation of 21%). The results for this species, which has a larger spatial variability, highlight the necessity of defining appropriate collocation criteria and of accounting for the spread of the observed airmasses. BASCOE appears to have more deficiencies in producing proxies of MIPAS HNO3 profiles compared to N2O, but the obtained standard deviation of less than 10% between BASCOE and FTIR is reasonable. Similar results on profiles comparisons are also shown in the paper, in addition to partial column ones. Article in Journal/Newspaper Kiruna Niedersächsisches Online-Archiv NOA Arrival Heights ENVELOPE(166.650,166.650,-77.817,-77.817) Kiruna Atmospheric Chemistry and Physics 7 2 377 396 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Vigouroux, C. De Mazière, M. Errera, Q. Chabrillat, S. Mahieu, E. Duchatelet, P. Wood, S. Smale, D. Mikuteit, S. Blumenstock, T. Hase, F. Jones, N. Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE |
topic_facet |
article Verlagsveröffentlichung |
description |
Within the framework of the Network for Detection of Atmospheric Composition Change (NDACC), regular ground-based Fourier transform infrared (FTIR) measurements of many species are performed at several locations. Inversion schemes provide vertical profile information and characterization of the retrieved products which are therefore relevant for contributing to the validation of MIPAS profiles in the stratosphere and upper troposphere. We have focused on the species HNO3 and N2O at 5 NDACC-sites distributed in both hemispheres, i.e., Jungfraujoch (46.5° N) and Kiruna (68° N) for the northern hemisphere, and Wollongong (34° S), Lauder (45° S) and Arrival Heights (78° S) for the southern hemisphere. These ground-based data have been compared with MIPAS offline profiles (v4.61) for the year 2003, collocated within 1000 km around the stations, in the lower to middle stratosphere. To get around the spatial collocation problem, comparisons have also been made between the same ground-based FTIR data and the corresponding profiles resulting from the stratospheric 4D-VAR data assimilation system BASCOE constrained by MIPAS data. This paper discusses the results of the comparisons and the usefullness of using BASCOE profiles as proxies for MIPAS data. It shows good agreement between MIPAS and FTIR N2O partial columns: the biases are below 5% for all the stations and the standard deviations are below 7% for the three mid-latitude stations, and below 10% for the high latitude ones. The comparisons with BASCOE partial columns give standard deviations below 4% for the mid-latitude stations to less than 8% for the high latitude ones. After making some corrections to take into account the known bias due to the use of different spectroscopic parameters, the comparisons of HNO3 partial columns show biases below 3% and standard deviations below 15% for all the stations except Arrival Heights (bias of 5%, standard deviation of 21%). The results for this species, which has a larger spatial variability, highlight the necessity of defining appropriate collocation criteria and of accounting for the spread of the observed airmasses. BASCOE appears to have more deficiencies in producing proxies of MIPAS HNO3 profiles compared to N2O, but the obtained standard deviation of less than 10% between BASCOE and FTIR is reasonable. Similar results on profiles comparisons are also shown in the paper, in addition to partial column ones. |
format |
Article in Journal/Newspaper |
author |
Vigouroux, C. De Mazière, M. Errera, Q. Chabrillat, S. Mahieu, E. Duchatelet, P. Wood, S. Smale, D. Mikuteit, S. Blumenstock, T. Hase, F. Jones, N. |
author_facet |
Vigouroux, C. De Mazière, M. Errera, Q. Chabrillat, S. Mahieu, E. Duchatelet, P. Wood, S. Smale, D. Mikuteit, S. Blumenstock, T. Hase, F. Jones, N. |
author_sort |
Vigouroux, C. |
title |
Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE |
title_short |
Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE |
title_full |
Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE |
title_fullStr |
Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE |
title_full_unstemmed |
Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE |
title_sort |
comparisons between ground-based ftir and mipas n2o and hno3 profiles before and after assimilation in bascoe |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doi.org/10.5194/acp-7-377-2007 https://noa.gwlb.de/receive/cop_mods_00048665 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048285/acp-7-377-2007.pdf https://acp.copernicus.org/articles/7/377/2007/acp-7-377-2007.pdf |
long_lat |
ENVELOPE(166.650,166.650,-77.817,-77.817) |
geographic |
Arrival Heights Kiruna |
geographic_facet |
Arrival Heights Kiruna |
genre |
Kiruna |
genre_facet |
Kiruna |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-7-377-2007 https://noa.gwlb.de/receive/cop_mods_00048665 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00048285/acp-7-377-2007.pdf https://acp.copernicus.org/articles/7/377/2007/acp-7-377-2007.pdf |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-7-377-2007 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
7 |
container_issue |
2 |
container_start_page |
377 |
op_container_end_page |
396 |
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1766058452405190656 |