Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region
Of the reactive halogens, those containing reactive bromine are of particular scientific interest as they play a key role in the chemistry and oxidising capacity of the polar troposphere (Simpson et al., 2015). In early spring, bromine molecules (as Br2) are rapidly released from the sea ice via het...
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ftunivwollongong:oai:ro.uow.edu.au:theses1-2207 2023-05-15T13:43:25+02:00 Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region Page, Neil 2021-01-01T08:00:00Z application/pdf https://ro.uow.edu.au/theses1/1208 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2207&context=theses1 unknown School of Earth, Atmospheric and Life Sciences https://ro.uow.edu.au/theses1/1208 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2207&context=theses1 University of Wollongong Thesis Collection 2017+ Antarctica atmospheric bromine mercury sea ice text 2021 ftunivwollongong 2022-01-17T23:24:38Z Of the reactive halogens, those containing reactive bromine are of particular scientific interest as they play a key role in the chemistry and oxidising capacity of the polar troposphere (Simpson et al., 2015). In early spring, bromine molecules (as Br2) are rapidly released from the sea ice via heterogenous reactions on sea salt surfaces, both in the sea ice itself and on blowing snow (Simpson et al., 2015; Huang et al., 2018; Peterson et al., 2019). This rapid bromine release can initiate a chemical reaction, known as a bromine explosion, which oxidises gaseous elemental mercury, resulting in the subsequent deposition of toxic water-soluble mercury into the polar environment (Prados-Roman et al., 2018). However, reactive bromine and mercury measurements in coastal Antarctica are mostly limited to a handful of short-term campaigns, limiting current understanding of the sources and drivers controlling variability. To further investigate these processes, observations of bromine monoxide (BrO) were acquired via Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) during six resupply voyages of the Aurora Australis to the coast of east Antarctica during the CAMMPCAN 2017-19 campaign, along with in situ measurements of gaseous elemental mercury (Hg0) and reactive mercury (RM). These were analysed along with meteorological measurements from the Aurora Australis, satellite observations of sea ice cover and modelled air mass back trajectories. Text Antarc* Antarctic Antarctica aurora australis East Antarctica Sea ice Southern Ocean University of Wollongong, Australia: Research Online Antarctic East Antarctica Southern Ocean |
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University of Wollongong, Australia: Research Online |
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Antarctica atmospheric bromine mercury sea ice |
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Antarctica atmospheric bromine mercury sea ice Page, Neil Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region |
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Antarctica atmospheric bromine mercury sea ice |
description |
Of the reactive halogens, those containing reactive bromine are of particular scientific interest as they play a key role in the chemistry and oxidising capacity of the polar troposphere (Simpson et al., 2015). In early spring, bromine molecules (as Br2) are rapidly released from the sea ice via heterogenous reactions on sea salt surfaces, both in the sea ice itself and on blowing snow (Simpson et al., 2015; Huang et al., 2018; Peterson et al., 2019). This rapid bromine release can initiate a chemical reaction, known as a bromine explosion, which oxidises gaseous elemental mercury, resulting in the subsequent deposition of toxic water-soluble mercury into the polar environment (Prados-Roman et al., 2018). However, reactive bromine and mercury measurements in coastal Antarctica are mostly limited to a handful of short-term campaigns, limiting current understanding of the sources and drivers controlling variability. To further investigate these processes, observations of bromine monoxide (BrO) were acquired via Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) during six resupply voyages of the Aurora Australis to the coast of east Antarctica during the CAMMPCAN 2017-19 campaign, along with in situ measurements of gaseous elemental mercury (Hg0) and reactive mercury (RM). These were analysed along with meteorological measurements from the Aurora Australis, satellite observations of sea ice cover and modelled air mass back trajectories. |
format |
Text |
author |
Page, Neil |
author_facet |
Page, Neil |
author_sort |
Page, Neil |
title |
Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region |
title_short |
Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region |
title_full |
Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region |
title_fullStr |
Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region |
title_full_unstemmed |
Improving our understanding of atmospheric mercury and bromine over the Southern Ocean and Antarctic sea-ice region |
title_sort |
improving our understanding of atmospheric mercury and bromine over the southern ocean and antarctic sea-ice region |
publisher |
School of Earth, Atmospheric and Life Sciences |
publishDate |
2021 |
url |
https://ro.uow.edu.au/theses1/1208 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2207&context=theses1 |
geographic |
Antarctic East Antarctica Southern Ocean |
geographic_facet |
Antarctic East Antarctica Southern Ocean |
genre |
Antarc* Antarctic Antarctica aurora australis East Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica aurora australis East Antarctica Sea ice Southern Ocean |
op_source |
University of Wollongong Thesis Collection 2017+ |
op_relation |
https://ro.uow.edu.au/theses1/1208 https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2207&context=theses1 |
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1766188864381124608 |