Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion
Fourier transform infra-red (FTIR) measurements of stratospheric trace species have been made at a network of five ground-based sites from 79°N to 47°N during the Northern hemisphere winter of 1995/1996. This winter was extremely cold with temperatures below the threshold for type 1 polar stratosphe...
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ftorbi:oai:orbi.ulg.ac.be:2268/163570 2024-04-21T08:06:33+00:00 Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion Paton Walsh, C. Bell, W. Blumenstock, T. Chipperfield, M.P. Galle, B. Mellqvist, J. Notholt, Justus Zander, Rodolphe Demoulin, Philippe Mahieu, Emmanuel GIRPAS 1998 https://orbi.uliege.be/handle/2268/163570 https://orbi.uliege.be/bitstream/2268/163570/1/Paton%20Walsh%201997%20%28O3%20Schliersee%29%20-%20Measurements%20at%205%20FTIR%20European%20sites%20and%20comparison%20with%20a%203D%20CTM%20-%20Cl%20activation%20and%20O3%20depletion.PDF en eng https://orbi.uliege.be/handle/2268/163570 info:hdl:2268/163570 https://orbi.uliege.be/bitstream/2268/163570/1/Paton%20Walsh%201997%20%28O3%20Schliersee%29%20-%20Measurements%20at%205%20FTIR%20European%20sites%20and%20comparison%20with%20a%203D%20CTM%20-%20Cl%20activation%20and%20O3%20depletion.PDF open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess urn:isbn:92-828-2365-2 Polar stratospheric ozone 1997, 305-308 (1998); The Fourth European Symposium on Polar Stratospheric Ozone Research, Schliersee, Germany [DE], 22-26 September 1997 atmosphere stratospheric trace gases FTIR 3D chemical transport model SLIMCAT chlorine activation ozone depletion Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique conference paper http://purl.org/coar/resource_type/c_5794 info:eu-repo/semantics/conferenceObject 1998 ftorbi 2024-03-27T14:45:43Z Fourier transform infra-red (FTIR) measurements of stratospheric trace species have been made at a network of five ground-based sites from 79°N to 47°N during the Northern hemisphere winter of 1995/1996. This winter was extremely cold with temperatures below the threshold for type 1 polar stratospheric cloud (PSC) formation from mid December 1995 until early March 1996 when there was a rapid warming of the stratosphere. Over 25 days experienced temperatures low enough for ice cloud (PSC type 2) formation. Vertical columns values for HCl, ClONO2, HF and HNO3 have been derived from FTIR measurements at the following sites: Ny Alesund, Spitzbergen (79°N, 12°E); Kiruna, Sweden (67°N, 21°E); Harestua, Norway (60°N, 11°E); London, England (51°N, 0°E) and the Jungfraujoch, Switzerland (48°N, 8°E), with measurements of other stratospheric trace gases, including O3 and ClO available from some of the sites. All of these sites are equipped with high resolution Bruker 120HR or 120M spectrometers, recording atmospheric spectra in the mid infrared using the Sun as a source. These measurements have been used to provide both evidence of substantial activation within large areas of the polar vortex and a subsequent O3 depletion. The measurements suggest a well mixed central vortex area surrounded by a vortex edge that may be highly variable in composition. The measurements also provide evidence of substantial mixing of activated air from the edge of the polar vortex into middle latitudes. Comparison with the SLIMCAT 3D chemical transport model highlights the underestimation of ClONO2 concentrations in the model, with subsequent implications for underestimating O3 loss. Conference Object Kiruna Spitzbergen University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
atmosphere stratospheric trace gases FTIR 3D chemical transport model SLIMCAT chlorine activation ozone depletion Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
atmosphere stratospheric trace gases FTIR 3D chemical transport model SLIMCAT chlorine activation ozone depletion Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Paton Walsh, C. Bell, W. Blumenstock, T. Chipperfield, M.P. Galle, B. Mellqvist, J. Notholt, Justus Zander, Rodolphe Demoulin, Philippe Mahieu, Emmanuel Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion |
topic_facet |
atmosphere stratospheric trace gases FTIR 3D chemical transport model SLIMCAT chlorine activation ozone depletion Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
Fourier transform infra-red (FTIR) measurements of stratospheric trace species have been made at a network of five ground-based sites from 79°N to 47°N during the Northern hemisphere winter of 1995/1996. This winter was extremely cold with temperatures below the threshold for type 1 polar stratospheric cloud (PSC) formation from mid December 1995 until early March 1996 when there was a rapid warming of the stratosphere. Over 25 days experienced temperatures low enough for ice cloud (PSC type 2) formation. Vertical columns values for HCl, ClONO2, HF and HNO3 have been derived from FTIR measurements at the following sites: Ny Alesund, Spitzbergen (79°N, 12°E); Kiruna, Sweden (67°N, 21°E); Harestua, Norway (60°N, 11°E); London, England (51°N, 0°E) and the Jungfraujoch, Switzerland (48°N, 8°E), with measurements of other stratospheric trace gases, including O3 and ClO available from some of the sites. All of these sites are equipped with high resolution Bruker 120HR or 120M spectrometers, recording atmospheric spectra in the mid infrared using the Sun as a source. These measurements have been used to provide both evidence of substantial activation within large areas of the polar vortex and a subsequent O3 depletion. The measurements suggest a well mixed central vortex area surrounded by a vortex edge that may be highly variable in composition. The measurements also provide evidence of substantial mixing of activated air from the edge of the polar vortex into middle latitudes. Comparison with the SLIMCAT 3D chemical transport model highlights the underestimation of ClONO2 concentrations in the model, with subsequent implications for underestimating O3 loss. |
author2 |
GIRPAS |
format |
Conference Object |
author |
Paton Walsh, C. Bell, W. Blumenstock, T. Chipperfield, M.P. Galle, B. Mellqvist, J. Notholt, Justus Zander, Rodolphe Demoulin, Philippe Mahieu, Emmanuel |
author_facet |
Paton Walsh, C. Bell, W. Blumenstock, T. Chipperfield, M.P. Galle, B. Mellqvist, J. Notholt, Justus Zander, Rodolphe Demoulin, Philippe Mahieu, Emmanuel |
author_sort |
Paton Walsh, C. |
title |
Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion |
title_short |
Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion |
title_full |
Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion |
title_fullStr |
Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion |
title_full_unstemmed |
Ground-based FTIR Measurements from a Series of European sites during the Winter of 1995/96 and a Comparison with a 3D Chemical Transport Model: Evidence of Chlorine Activation and Ozone depletion |
title_sort |
ground-based ftir measurements from a series of european sites during the winter of 1995/96 and a comparison with a 3d chemical transport model: evidence of chlorine activation and ozone depletion |
publishDate |
1998 |
url |
https://orbi.uliege.be/handle/2268/163570 https://orbi.uliege.be/bitstream/2268/163570/1/Paton%20Walsh%201997%20%28O3%20Schliersee%29%20-%20Measurements%20at%205%20FTIR%20European%20sites%20and%20comparison%20with%20a%203D%20CTM%20-%20Cl%20activation%20and%20O3%20depletion.PDF |
genre |
Kiruna Spitzbergen |
genre_facet |
Kiruna Spitzbergen |
op_source |
urn:isbn:92-828-2365-2 Polar stratospheric ozone 1997, 305-308 (1998); The Fourth European Symposium on Polar Stratospheric Ozone Research, Schliersee, Germany [DE], 22-26 September 1997 |
op_relation |
https://orbi.uliege.be/handle/2268/163570 info:hdl:2268/163570 https://orbi.uliege.be/bitstream/2268/163570/1/Paton%20Walsh%201997%20%28O3%20Schliersee%29%20-%20Measurements%20at%205%20FTIR%20European%20sites%20and%20comparison%20with%20a%203D%20CTM%20-%20Cl%20activation%20and%20O3%20depletion.PDF |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1796945956542873600 |