Modelling chemistry over the Dead Sea: bromine and ozone chemistry
Measurements of O<sub>3</sub> and BrO concentrations over the Dead Sea indicate that Ozone Depletion Events (ODEs), widely known to happen in polar regions, are also occuring over the Dead Sea due to the very high bromine content of the Dead Sea water. However, we show th...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2009-07-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/9/5057/2009/acp-9-5057-2009.pdf |
| _version_ | 1819039452334391296 |
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| author | R. von Glasow L. Smoydzin |
| author_facet | R. von Glasow L. Smoydzin |
| author_sort | R. von Glasow |
| collection | DOAJ |
| description | Measurements of O<sub>3</sub> and BrO concentrations over the Dead Sea indicate that Ozone Depletion Events (ODEs), widely known to happen in polar regions, are also occuring over the Dead Sea due to the very high bromine content of the Dead Sea water. However, we show that BrO and O<sub>3</sub> levels as they are detected cannot solely be explained by high Br<sup>&minus;</sup> levels in the Dead Sea water and the release of gas phase halogen species out of sea borne aerosol particles and their conversion to reactive halogen species. It is likely that other sources for reactive halogen compounds are needed to explain the observed concentrations for BrO and O<sub>3</sub>. To explain the chemical mechanism taking place over the Dead Sea leading to BrO levels of several pmol/mol we used the one-dimensional model MISTRA which calculates microphysics, meteorology, gas and aerosol phase chemistry. We performed pseudo Lagrangian studies by letting the model column first move over the desert which surrounds the Dead Sea region and then let it move over the Dead Sea itself. To include an additional source for gas phase halogen compounds, gas exchange between the Dead Sea water and the atmosphere is treated explicitly. Model calculations indicate that this process has to be included to explain the measurements. |
| first_indexed | 2024-12-21T08:53:26Z |
| format | Article |
| id | doaj.art-664fb0f11f494879821831488d29fde6 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-21T08:53:26Z |
| publishDate | 2009-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-664fb0f11f494879821831488d29fde62022-12-21T19:09:38ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242009-07-0191450575072Modelling chemistry over the Dead Sea: bromine and ozone chemistryR. von GlasowL. SmoydzinMeasurements of O<sub>3</sub> and BrO concentrations over the Dead Sea indicate that Ozone Depletion Events (ODEs), widely known to happen in polar regions, are also occuring over the Dead Sea due to the very high bromine content of the Dead Sea water. However, we show that BrO and O<sub>3</sub> levels as they are detected cannot solely be explained by high Br<sup>&minus;</sup> levels in the Dead Sea water and the release of gas phase halogen species out of sea borne aerosol particles and their conversion to reactive halogen species. It is likely that other sources for reactive halogen compounds are needed to explain the observed concentrations for BrO and O<sub>3</sub>. To explain the chemical mechanism taking place over the Dead Sea leading to BrO levels of several pmol/mol we used the one-dimensional model MISTRA which calculates microphysics, meteorology, gas and aerosol phase chemistry. We performed pseudo Lagrangian studies by letting the model column first move over the desert which surrounds the Dead Sea region and then let it move over the Dead Sea itself. To include an additional source for gas phase halogen compounds, gas exchange between the Dead Sea water and the atmosphere is treated explicitly. Model calculations indicate that this process has to be included to explain the measurements.http://www.atmos-chem-phys.net/9/5057/2009/acp-9-5057-2009.pdf |
| spellingShingle | R. von Glasow L. Smoydzin Modelling chemistry over the Dead Sea: bromine and ozone chemistry Atmospheric Chemistry and Physics |
| title | Modelling chemistry over the Dead Sea: bromine and ozone chemistry |
| title_full | Modelling chemistry over the Dead Sea: bromine and ozone chemistry |
| title_fullStr | Modelling chemistry over the Dead Sea: bromine and ozone chemistry |
| title_full_unstemmed | Modelling chemistry over the Dead Sea: bromine and ozone chemistry |
| title_short | Modelling chemistry over the Dead Sea: bromine and ozone chemistry |
| title_sort | modelling chemistry over the dead sea bromine and ozone chemistry |
| url | http://www.atmos-chem-phys.net/9/5057/2009/acp-9-5057-2009.pdf |
| work_keys_str_mv | AT rvonglasow modellingchemistryoverthedeadseabromineandozonechemistry AT lsmoydzin modellingchemistryoverthedeadseabromineandozonechemistry |