Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008
During the 2008 International Polar Year, the POLARCAT (Polar Study using Aircraft, Remote Sensing, Surface Measurements, and Models of Climate Chemistry, Aerosols, and Transport) campaign, conducted in summer over Greenland and Canada, produced a large number of measurements from three aircraft and...
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ftdoajarticles:oai:doaj.org/article:8aafcfc32f434abdb6e1ac6515f80ecc 2023-05-15T15:18:17+02:00 Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008 G. Ancellet N. Daskalakis J. C. Raut D. Tarasick J. Hair B. Quennehen F. Ravetta H. Schlager A. J. Weinheimer A. M. Thompson B. Johnson J. L. Thomas K. S. Law 2016-10-01T00:00:00Z https://doi.org/10.5194/acp-16-13341-2016 https://doaj.org/article/8aafcfc32f434abdb6e1ac6515f80ecc EN eng Copernicus Publications https://www.atmos-chem-phys.net/16/13341/2016/acp-16-13341-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-13341-2016 1680-7316 1680-7324 https://doaj.org/article/8aafcfc32f434abdb6e1ac6515f80ecc Atmospheric Chemistry and Physics, Vol 16, Pp 13341-13358 (2016) Physics QC1-999 Chemistry QD1-999 article 2016 ftdoajarticles https://doi.org/10.5194/acp-16-13341-2016 2022-12-31T00:38:12Z During the 2008 International Polar Year, the POLARCAT (Polar Study using Aircraft, Remote Sensing, Surface Measurements, and Models of Climate Chemistry, Aerosols, and Transport) campaign, conducted in summer over Greenland and Canada, produced a large number of measurements from three aircraft and seven ozonesonde stations. Here we present an observation-integrated analysis based on three different types of O 3 measurements: airborne lidar, airborne UV absorption or chemiluminescence measurement, and intensified electrochemical concentration cell (ECC) ozonesonde profiles. Discussion of the latitudinal and vertical variability of tropospheric ozone north of 55° N during this period is performed with the aid of a regional model (WFR-Chem). The model is able to reproduce the O 3 latitudinal and vertical variability but with a negative O 3 bias of 6–15 ppbv in the free troposphere above 4 km, especially over Canada. For Canada, large average CO concentrations in the free troposphere above 4 km ( > 130 ppbv) and the weak correlation (< 30 %) of O 3 and PV suggest that stratosphere–troposphere exchange (STE) is not the major contributor to average tropospheric ozone at latitudes less than 70° N, due to the fact that local biomass burning (BB) emissions were significant during the 2008 summer period. Conversely, significant STE is found over Greenland according to the better O 3 vs. PV correlation ( > 40 %) and the higher values of the 75th PV percentile. It is related to the persistence of cyclonic activity during the summer over Baffin Bay. Using differences between average concentration above Northern and Southern Canada, a weak negative latitudinal summer ozone gradient of −6 to −8 ppbv is found in the mid-troposphere between 4 and 8 km. This is attributed to an efficient O 3 photochemical production from BB emissions at latitudes less than 65° N, while the STE contribution is more homogeneous in the latitude range 55–70° N. A positive ozone latitudinal gradient of 12 ppbv is observed in the same ... Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Greenland International Polar Year Directory of Open Access Journals: DOAJ Articles Arctic Baffin Bay Canada Greenland Atmospheric Chemistry and Physics 16 20 13341 13358 |
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 G. Ancellet N. Daskalakis J. C. Raut D. Tarasick J. Hair B. Quennehen F. Ravetta H. Schlager A. J. Weinheimer A. M. Thompson B. Johnson J. L. Thomas K. S. Law Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
During the 2008 International Polar Year, the POLARCAT (Polar Study using Aircraft, Remote Sensing, Surface Measurements, and Models of Climate Chemistry, Aerosols, and Transport) campaign, conducted in summer over Greenland and Canada, produced a large number of measurements from three aircraft and seven ozonesonde stations. Here we present an observation-integrated analysis based on three different types of O 3 measurements: airborne lidar, airborne UV absorption or chemiluminescence measurement, and intensified electrochemical concentration cell (ECC) ozonesonde profiles. Discussion of the latitudinal and vertical variability of tropospheric ozone north of 55° N during this period is performed with the aid of a regional model (WFR-Chem). The model is able to reproduce the O 3 latitudinal and vertical variability but with a negative O 3 bias of 6–15 ppbv in the free troposphere above 4 km, especially over Canada. For Canada, large average CO concentrations in the free troposphere above 4 km ( > 130 ppbv) and the weak correlation (< 30 %) of O 3 and PV suggest that stratosphere–troposphere exchange (STE) is not the major contributor to average tropospheric ozone at latitudes less than 70° N, due to the fact that local biomass burning (BB) emissions were significant during the 2008 summer period. Conversely, significant STE is found over Greenland according to the better O 3 vs. PV correlation ( > 40 %) and the higher values of the 75th PV percentile. It is related to the persistence of cyclonic activity during the summer over Baffin Bay. Using differences between average concentration above Northern and Southern Canada, a weak negative latitudinal summer ozone gradient of −6 to −8 ppbv is found in the mid-troposphere between 4 and 8 km. This is attributed to an efficient O 3 photochemical production from BB emissions at latitudes less than 65° N, while the STE contribution is more homogeneous in the latitude range 55–70° N. A positive ozone latitudinal gradient of 12 ppbv is observed in the same ... |
format |
Article in Journal/Newspaper |
author |
G. Ancellet N. Daskalakis J. C. Raut D. Tarasick J. Hair B. Quennehen F. Ravetta H. Schlager A. J. Weinheimer A. M. Thompson B. Johnson J. L. Thomas K. S. Law |
author_facet |
G. Ancellet N. Daskalakis J. C. Raut D. Tarasick J. Hair B. Quennehen F. Ravetta H. Schlager A. J. Weinheimer A. M. Thompson B. Johnson J. L. Thomas K. S. Law |
author_sort |
G. Ancellet |
title |
Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
title_short |
Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
title_full |
Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
title_fullStr |
Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
title_full_unstemmed |
Analysis of the latitudinal variability of tropospheric ozone in the Arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
title_sort |
analysis of the latitudinal variability of tropospheric ozone in the arctic using the large number of aircraft and ozonesonde observations in early summer 2008 |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-13341-2016 https://doaj.org/article/8aafcfc32f434abdb6e1ac6515f80ecc |
geographic |
Arctic Baffin Bay Canada Greenland |
geographic_facet |
Arctic Baffin Bay Canada Greenland |
genre |
Arctic Baffin Bay Baffin Bay Baffin Greenland International Polar Year |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Greenland International Polar Year |
op_source |
Atmospheric Chemistry and Physics, Vol 16, Pp 13341-13358 (2016) |
op_relation |
https://www.atmos-chem-phys.net/16/13341/2016/acp-16-13341-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-13341-2016 1680-7316 1680-7324 https://doaj.org/article/8aafcfc32f434abdb6e1ac6515f80ecc |
op_doi |
https://doi.org/10.5194/acp-16-13341-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
20 |
container_start_page |
13341 |
op_container_end_page |
13358 |
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1766348483924590592 |