Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model
The Arctic, though geographically remote, interests scientists because of the air-sea interactions that govern the composition of the atmosphere (Knepp et al. 2010). These interactions are strongly influenced by sea ice. Arctic sea ice extent is decreasing and at an accelerated rate. Between 1979 an...
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Language: | English |
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ftfloridasu:oai:diginole.lib.fsu.edu:fsu_667651 2024-06-09T07:43:10+00:00 Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model Confer, Kaitlyn (authoraut) Holmes, Christopher (authoraut) 2019-04-26 1 online resource computer https://diginole.lib.fsu.edu/islandora/object/fsu%3A667651/datastream/TN/view/Evaluating%20and%20Improving%20Arctic%20Ozone%20Chemistry%20in%20an%20Atmospheric%20Model.jpg English eng eng fsu:667651 (IID) FSU_libsubv1_scholarship_submission_1556311545_bedb643f https://diginole.lib.fsu.edu/islandora/object/fsu%3A667651/datastream/TN/view/Evaluating%20and%20Improving%20Arctic%20Ozone%20Chemistry%20in%20an%20Atmospheric%20Model.jpg Text bachelor thesis 2019 ftfloridasu 2024-05-10T08:08:13Z The Arctic, though geographically remote, interests scientists because of the air-sea interactions that govern the composition of the atmosphere (Knepp et al. 2010). These interactions are strongly influenced by sea ice. Arctic sea ice extent is decreasing and at an accelerated rate. Between 1979 and 2006, it is estimated the sea ice extent at the end of the melting season decreased 9.1% per decade (Stroeve et al. 2007). These changes have large implications for global temperature, air-sea exchange fluxes, and atmospheric chemistry. Sea ice is a source of reactive halogens, particularly bromine radicals and changes to sea ice can therefore impact tropospheric ozone concentrations. We see these changes most abundantly during the springtime when reactive halogens like bromine monoxide (BrO) deplete ozone to near-zero levels. Ozone is the primary precursor to the atmospheric oxidizing agent – the hydroxyl radical (OH) – which removes harmful pollutants from the air. Thus, the loss of ozone can affect the oxidation capacity of the atmosphere. As climate changes, it is important to understand and predict the effects of changing sea ice on Arctic atmospheric chemistry. In this work, we assess the ability of a current global model, GEOS-Chem, to predict ozone and BrO concentrations over the Arctic Ocean compared to a new dataset of ozone and BrO concentrations collected over Arctic sea ice. We quantify the performance of two model versions and discuss the processes that might further improve the model. Keywords: Atmospheric chemistry Bachelor Thesis Arctic Arctic Ocean Sea ice Florida State University: DigiNole Commons Arctic Arctic Ocean |
institution |
Open Polar |
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Florida State University: DigiNole Commons |
op_collection_id |
ftfloridasu |
language |
English |
description |
The Arctic, though geographically remote, interests scientists because of the air-sea interactions that govern the composition of the atmosphere (Knepp et al. 2010). These interactions are strongly influenced by sea ice. Arctic sea ice extent is decreasing and at an accelerated rate. Between 1979 and 2006, it is estimated the sea ice extent at the end of the melting season decreased 9.1% per decade (Stroeve et al. 2007). These changes have large implications for global temperature, air-sea exchange fluxes, and atmospheric chemistry. Sea ice is a source of reactive halogens, particularly bromine radicals and changes to sea ice can therefore impact tropospheric ozone concentrations. We see these changes most abundantly during the springtime when reactive halogens like bromine monoxide (BrO) deplete ozone to near-zero levels. Ozone is the primary precursor to the atmospheric oxidizing agent – the hydroxyl radical (OH) – which removes harmful pollutants from the air. Thus, the loss of ozone can affect the oxidation capacity of the atmosphere. As climate changes, it is important to understand and predict the effects of changing sea ice on Arctic atmospheric chemistry. In this work, we assess the ability of a current global model, GEOS-Chem, to predict ozone and BrO concentrations over the Arctic Ocean compared to a new dataset of ozone and BrO concentrations collected over Arctic sea ice. We quantify the performance of two model versions and discuss the processes that might further improve the model. Keywords: Atmospheric chemistry |
author2 |
Confer, Kaitlyn (authoraut) Holmes, Christopher (authoraut) |
format |
Bachelor Thesis |
title |
Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model |
spellingShingle |
Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model |
title_short |
Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model |
title_full |
Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model |
title_fullStr |
Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model |
title_full_unstemmed |
Evaluating and Improving Arctic Ozone Chemistry in an Atmospheric Model |
title_sort |
evaluating and improving arctic ozone chemistry in an atmospheric model |
publishDate |
2019 |
url |
https://diginole.lib.fsu.edu/islandora/object/fsu%3A667651/datastream/TN/view/Evaluating%20and%20Improving%20Arctic%20Ozone%20Chemistry%20in%20an%20Atmospheric%20Model.jpg |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_relation |
fsu:667651 (IID) FSU_libsubv1_scholarship_submission_1556311545_bedb643f https://diginole.lib.fsu.edu/islandora/object/fsu%3A667651/datastream/TN/view/Evaluating%20and%20Improving%20Arctic%20Ozone%20Chemistry%20in%20an%20Atmospheric%20Model.jpg |
_version_ |
1801371923136905216 |