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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Online Access: | https://doi.org/10.5194/acp-16-13341-2016 |
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ftncar:oai:drupal-site.org:articles_18905 2023-09-05T13:17:45+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 Ancellet, Gerard (author) Daskalakis, Nikos (author) Raut, Jean Christophe (author) Tarasick, David (author) Hair, Jonathan (author) Quennehen, Boris (author) Ravetta, François (author) Schlager, Hans (author) Weinheimer, Andrew J. (author) Thompson, Anne M. (author) Johnson, Bryan (author) Thomas, Jennie L. (author) Law, Katharine S. (author) 2016-10-28 https://doi.org/10.5194/acp-16-13341-2016 en eng Atmospheric Chemistry and Physics--Atmos. Chem. Phys.--1680-7324 articles:18905 ark:/85065/d7765h1x doi:10.5194/acp-16-13341-2016 Copyright Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License. article Text 2016 ftncar https://doi.org/10.5194/acp-16-13341-2016 2023-08-14T18:43:38Z 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 O3 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 O3 latitudinal and vertical variability but with a negative O3 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 O3 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 O3 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 O3 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 altitude ... Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Greenland International Polar Year OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Baffin Bay Canada Greenland Atmospheric Chemistry and Physics 16 20 13341 13358 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
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 O3 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 O3 latitudinal and vertical variability but with a negative O3 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 O3 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 O3 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 O3 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 altitude ... |
author2 |
Ancellet, Gerard (author) Daskalakis, Nikos (author) Raut, Jean Christophe (author) Tarasick, David (author) Hair, Jonathan (author) Quennehen, Boris (author) Ravetta, François (author) Schlager, Hans (author) Weinheimer, Andrew J. (author) Thompson, Anne M. (author) Johnson, Bryan (author) Thomas, Jennie L. (author) Law, Katharine S. (author) |
format |
Article in Journal/Newspaper |
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 |
spellingShingle |
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 |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-13341-2016 |
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_relation |
Atmospheric Chemistry and Physics--Atmos. Chem. Phys.--1680-7324 articles:18905 ark:/85065/d7765h1x doi:10.5194/acp-16-13341-2016 |
op_rights |
Copyright Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License. |
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 |
_version_ |
1776198809849692160 |