Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ...
Tropospheric reactive bromine (Bry) influences the oxidation capacity of the atmosphere by acting as a sink for ozone and nitrogen oxides. Aerosol acidity plays a crucial role in Bry abundances through acid-catalyzed debromination from sea-salt-aerosol, the largest global source. Bromine concentrati...
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Online Access: | https://dx.doi.org/10.5061/dryad.pk0p2ngw5 https://datadryad.org/stash/dataset/doi:10.5061/dryad.pk0p2ngw5 |
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ftdatacite:10.5061/dryad.pk0p2ngw5 2024-06-09T07:44:25+00:00 Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ... Zhai, Shuting Alexander, Becky 2023 https://dx.doi.org/10.5061/dryad.pk0p2ngw5 https://datadryad.org/stash/dataset/doi:10.5061/dryad.pk0p2ngw5 en eng Dryad Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 FOS Earth and related environmental sciences GEOS-Chem Ice cores historical simulations global chemistry halogen chemistry Dataset dataset 2023 ftdatacite https://doi.org/10.5061/dryad.pk0p2ngw5 2024-05-13T11:16:38Z Tropospheric reactive bromine (Bry) influences the oxidation capacity of the atmosphere by acting as a sink for ozone and nitrogen oxides. Aerosol acidity plays a crucial role in Bry abundances through acid-catalyzed debromination from sea-salt-aerosol, the largest global source. Bromine concentrations in a Russian Arctic ice-core, Akademii Nauk, show a 3.5-fold increase from pre-industrial (PI) to the 1970s (peak acidity, PA), and decreased by half to 1999 (present day, PD). Ice-core acidity mirrors this trend, showing robust correlation with bromine, especially after 1940 (r=0.9). Model simulations considering anthropogenic emission changes alone show that atmospheric acidity is the main driver of Bry changes, consistent with the observed relationship between acidity and bromine. The influence of atmospheric acidity and Bry should be considered in interpretation of ice-core bromine trends. ... : We use a global 3D chemical transport model GEOS-Chem (version 11-02d, https://github.com/geoschem/geos-chem/tree/v11-02d-prelim) for historical simulations. The model is driven by MERRA-2 assimilated meteorological fields from the Goddard Earth Observing System (GEOS) (Gelaro et al., 2017), and contains detailed HOx-NOx-VOC-ozone-halogen-aerosol tropospheric chemistry (Wang et al., 2021) and fully coupled stratospheric chemistry (Eastham et al., 2014). Details of the modeled bromine chemistry are shown in Fig. S1‒S3. Sea-salt-aerosol debromination occurs in both open ocean (Jaeglé et al., 2011) and blowing snow (Huang & Jaeglé, 2017) sourced sea-salt-aerosol. Following Zhai et al. (2023), ozone dry deposition velocity onto snow and ice is updated to 0.01 cm s−1, consistent with observations (Simpson et al., 2007). Snowpack bromine emissions (Swanson et al., 2022; Zhai et al., 2023) are not included in the model. Model simulations are performed under three anthropogenic emission scenarios: pre-industrial ... Dataset Arctic ice core DataCite Metadata Store (German National Library of Science and Technology) Arctic Merra ENVELOPE(12.615,12.615,65.816,65.816) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
FOS Earth and related environmental sciences GEOS-Chem Ice cores historical simulations global chemistry halogen chemistry |
spellingShingle |
FOS Earth and related environmental sciences GEOS-Chem Ice cores historical simulations global chemistry halogen chemistry Zhai, Shuting Alexander, Becky Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ... |
topic_facet |
FOS Earth and related environmental sciences GEOS-Chem Ice cores historical simulations global chemistry halogen chemistry |
description |
Tropospheric reactive bromine (Bry) influences the oxidation capacity of the atmosphere by acting as a sink for ozone and nitrogen oxides. Aerosol acidity plays a crucial role in Bry abundances through acid-catalyzed debromination from sea-salt-aerosol, the largest global source. Bromine concentrations in a Russian Arctic ice-core, Akademii Nauk, show a 3.5-fold increase from pre-industrial (PI) to the 1970s (peak acidity, PA), and decreased by half to 1999 (present day, PD). Ice-core acidity mirrors this trend, showing robust correlation with bromine, especially after 1940 (r=0.9). Model simulations considering anthropogenic emission changes alone show that atmospheric acidity is the main driver of Bry changes, consistent with the observed relationship between acidity and bromine. The influence of atmospheric acidity and Bry should be considered in interpretation of ice-core bromine trends. ... : We use a global 3D chemical transport model GEOS-Chem (version 11-02d, https://github.com/geoschem/geos-chem/tree/v11-02d-prelim) for historical simulations. The model is driven by MERRA-2 assimilated meteorological fields from the Goddard Earth Observing System (GEOS) (Gelaro et al., 2017), and contains detailed HOx-NOx-VOC-ozone-halogen-aerosol tropospheric chemistry (Wang et al., 2021) and fully coupled stratospheric chemistry (Eastham et al., 2014). Details of the modeled bromine chemistry are shown in Fig. S1‒S3. Sea-salt-aerosol debromination occurs in both open ocean (Jaeglé et al., 2011) and blowing snow (Huang & Jaeglé, 2017) sourced sea-salt-aerosol. Following Zhai et al. (2023), ozone dry deposition velocity onto snow and ice is updated to 0.01 cm s−1, consistent with observations (Simpson et al., 2007). Snowpack bromine emissions (Swanson et al., 2022; Zhai et al., 2023) are not included in the model. Model simulations are performed under three anthropogenic emission scenarios: pre-industrial ... |
format |
Dataset |
author |
Zhai, Shuting Alexander, Becky |
author_facet |
Zhai, Shuting Alexander, Becky |
author_sort |
Zhai, Shuting |
title |
Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ... |
title_short |
Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ... |
title_full |
Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ... |
title_fullStr |
Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ... |
title_full_unstemmed |
Data to support: Anthropogenic influence on tropospheric reactive bromine since the pre-industrial: Implications for ice-core bromine trends ... |
title_sort |
data to support: anthropogenic influence on tropospheric reactive bromine since the pre-industrial: implications for ice-core bromine trends ... |
publisher |
Dryad |
publishDate |
2023 |
url |
https://dx.doi.org/10.5061/dryad.pk0p2ngw5 https://datadryad.org/stash/dataset/doi:10.5061/dryad.pk0p2ngw5 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Arctic Merra |
geographic_facet |
Arctic Merra |
genre |
Arctic ice core |
genre_facet |
Arctic ice core |
op_rights |
Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 |
op_doi |
https://doi.org/10.5061/dryad.pk0p2ngw5 |
_version_ |
1801373161232531456 |