Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000
The major goal of the Tropospheric Ozone Production about the Spring Equinox (TOPSE) field campaign (2000) was to study the cause of the spring Arctic ozone maximum in the free troposphere. Sources for tropospheric ozone (O₃) are transport of O₃ from the stratosphere and in-situ photochemical produc...
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ftdatacite:10.5065/r9wc-7n77 2023-05-15T14:55:38+02:00 Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000 Zauscher, Melanie Flocke, Frank Stroud, Craig Weinheimer, Andrew Cantrell, Terri Worster, Cindy Munoz, Ernesto 2002 https://dx.doi.org/10.5065/r9wc-7n77 https://opensky.ucar.edu/islandora/object/manuscripts:545 unknown University Corporation For Atmospheric Research (UCAR) Troposphere Stratosphere Photochemical production Air mass trajectories Master mechanism Photochemistry manuscript Text article-journal ScholarlyArticle 2002 ftdatacite https://doi.org/10.5065/r9wc-7n77 2021-11-05T12:55:41Z The major goal of the Tropospheric Ozone Production about the Spring Equinox (TOPSE) field campaign (2000) was to study the cause of the spring Arctic ozone maximum in the free troposphere. Sources for tropospheric ozone (O₃) are transport of O₃ from the stratosphere and in-situ photochemical production. Peroxyacetyl Nitrate (PAN) can be used as a tropospheric indicator, since it is formed photochemically along with ozone and there are no sources of PAN in the stratosphere. This study focused on examining the evolution of O₃ and PAN along air mass trajectories, calculated using the HYSPLIT© model, from the source region of the air mass to the point of observation in the Arctic on board the C-130 aircraft. By step-wise “backwards” modeling along sections of the air mass trajectory, NCAR’s Master Mechanism could be utilized to estimate initial conditions in the source area, which were within the expectations for a typical urban air mass. The Master Mechanism was then used to model the photochemistry along the trajectory forward to the point of observation. The observed O₃ to PAN ratio and the modeled ratio were within 5%. Thus, it was concluded that the modeling approach was successful. Based on the evolution of the O₃ to PAN ratio from a city mix at the source to a value very close to that observed, it was also concluded that no stratospheric O₃ input was needed for the trajectory case studied. The comparison of more trajectories and source regions will help to further constrain the Arctic ozone budget. Text Arctic Tropospheric Ozone Production About the Spring Equinox DataCite Metadata Store (German National Library of Science and Technology) Arctic |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Troposphere Stratosphere Photochemical production Air mass trajectories Master mechanism Photochemistry |
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Troposphere Stratosphere Photochemical production Air mass trajectories Master mechanism Photochemistry Zauscher, Melanie Flocke, Frank Stroud, Craig Weinheimer, Andrew Cantrell, Terri Worster, Cindy Munoz, Ernesto Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000 |
topic_facet |
Troposphere Stratosphere Photochemical production Air mass trajectories Master mechanism Photochemistry |
description |
The major goal of the Tropospheric Ozone Production about the Spring Equinox (TOPSE) field campaign (2000) was to study the cause of the spring Arctic ozone maximum in the free troposphere. Sources for tropospheric ozone (O₃) are transport of O₃ from the stratosphere and in-situ photochemical production. Peroxyacetyl Nitrate (PAN) can be used as a tropospheric indicator, since it is formed photochemically along with ozone and there are no sources of PAN in the stratosphere. This study focused on examining the evolution of O₃ and PAN along air mass trajectories, calculated using the HYSPLIT© model, from the source region of the air mass to the point of observation in the Arctic on board the C-130 aircraft. By step-wise “backwards” modeling along sections of the air mass trajectory, NCAR’s Master Mechanism could be utilized to estimate initial conditions in the source area, which were within the expectations for a typical urban air mass. The Master Mechanism was then used to model the photochemistry along the trajectory forward to the point of observation. The observed O₃ to PAN ratio and the modeled ratio were within 5%. Thus, it was concluded that the modeling approach was successful. Based on the evolution of the O₃ to PAN ratio from a city mix at the source to a value very close to that observed, it was also concluded that no stratospheric O₃ input was needed for the trajectory case studied. The comparison of more trajectories and source regions will help to further constrain the Arctic ozone budget. |
format |
Text |
author |
Zauscher, Melanie Flocke, Frank Stroud, Craig Weinheimer, Andrew Cantrell, Terri Worster, Cindy Munoz, Ernesto |
author_facet |
Zauscher, Melanie Flocke, Frank Stroud, Craig Weinheimer, Andrew Cantrell, Terri Worster, Cindy Munoz, Ernesto |
author_sort |
Zauscher, Melanie |
title |
Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000 |
title_short |
Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000 |
title_full |
Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000 |
title_fullStr |
Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000 |
title_full_unstemmed |
Evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during TOPSE in Spring 2000 |
title_sort |
evolution of ozone and peroxyacetyl nitrate along air parcel trajectories sampled during topse in spring 2000 |
publisher |
University Corporation For Atmospheric Research (UCAR) |
publishDate |
2002 |
url |
https://dx.doi.org/10.5065/r9wc-7n77 https://opensky.ucar.edu/islandora/object/manuscripts:545 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tropospheric Ozone Production About the Spring Equinox |
genre_facet |
Arctic Tropospheric Ozone Production About the Spring Equinox |
op_doi |
https://doi.org/10.5065/r9wc-7n77 |
_version_ |
1766327661564526592 |