Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica
Measured Fluxes of nitrous acid at Browning Pass, Antarctica were very low, despite conditions that are generally understood as favorable for HONO emissions, including: acidic snow surfaces, an abundance of NO3- anions in the snow surface, and abundant UV light for NO3- photolysis. Photochemical mod...
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ftholloway:oai:repository.royalholloway.ac.uk:3eca6ff1-1748-44a9-fabb-93a97461cda7/7 2023-05-15T13:59:32+02:00 Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica Beine, HJ Amoroso, A Domine, F King, Martin Nardino, M Ianniello, A France, JL 2006-1-1 application/pdf https://repository.royalholloway.ac.uk/items/3eca6ff1-1748-44a9-fabb-93a97461cda7/7/ eng eng file://localhost/Users/martin/Documents/Papers/2006/Beine/Atmos%20Chem%20Phys%202006%20Beine-1.pdf https://repository.royalholloway.ac.uk/items/3eca6ff1-1748-44a9-fabb-93a97461cda7/7/ Atmospheric Chemistry and Physics, 6 South-Pole Boundary-Layer Uv-Radiation Sea-Ice Nitrate Iscat 2000 Nitrogen-Dioxide Hydrogen-Peroxide Photolysis Fluxes Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion 2006 ftholloway 2022-09-26T12:24:13Z Measured Fluxes of nitrous acid at Browning Pass, Antarctica were very low, despite conditions that are generally understood as favorable for HONO emissions, including: acidic snow surfaces, an abundance of NO3- anions in the snow surface, and abundant UV light for NO3- photolysis. Photochemical modeling suggests noon time HONO fluxes of 5-10 nmol m(-2) h(-1); the measured fluxes, however, were close to zero throughout the campaign. The location and state of NO3- in snow is crucial to its reactivity. The analysis of soluble mineral ions in snow reveals that the NO3- ion is probably present in aged snows as NaNO3. This is peculiar to our study site, and we suggest that this may affect the photochemical reactivity of NO3-, by preventing the release of products, or providing a reactive medium for newly formed HONO. In fresh snow, the NO3- ion is probably present as dissolved or adsorbed HNO3 and yet, no HONO emissions were observed. We speculate that HONO formation from NO3- photolysis may involve electron transfer reactions of NO2 from photosensitized organics and that fresh snows at our site had insufficient concentrations of adequate organic compounds to favor this reaction. Article in Journal/Newspaper Antarc* Antarctica Sea ice South pole South pole Royal Holloway University of London: Royal Holloway Digital Repository Browning ENVELOPE(164.050,164.050,-74.617,-74.617) Browning Pass ENVELOPE(163.983,163.983,-74.600,-74.600) South Pole |
institution |
Open Polar |
collection |
Royal Holloway University of London: Royal Holloway Digital Repository |
op_collection_id |
ftholloway |
language |
English |
topic |
South-Pole Boundary-Layer Uv-Radiation Sea-Ice Nitrate Iscat 2000 Nitrogen-Dioxide Hydrogen-Peroxide Photolysis Fluxes Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry |
spellingShingle |
South-Pole Boundary-Layer Uv-Radiation Sea-Ice Nitrate Iscat 2000 Nitrogen-Dioxide Hydrogen-Peroxide Photolysis Fluxes Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry Beine, HJ Amoroso, A Domine, F King, Martin Nardino, M Ianniello, A France, JL Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica |
topic_facet |
South-Pole Boundary-Layer Uv-Radiation Sea-Ice Nitrate Iscat 2000 Nitrogen-Dioxide Hydrogen-Peroxide Photolysis Fluxes Faculty of Science\Earth Sciences Research Groups and Centres\Earth Sciences\Ancient and Modern Earth Systems Research Groups and Centres\Earth Sciences\Geochemistry |
description |
Measured Fluxes of nitrous acid at Browning Pass, Antarctica were very low, despite conditions that are generally understood as favorable for HONO emissions, including: acidic snow surfaces, an abundance of NO3- anions in the snow surface, and abundant UV light for NO3- photolysis. Photochemical modeling suggests noon time HONO fluxes of 5-10 nmol m(-2) h(-1); the measured fluxes, however, were close to zero throughout the campaign. The location and state of NO3- in snow is crucial to its reactivity. The analysis of soluble mineral ions in snow reveals that the NO3- ion is probably present in aged snows as NaNO3. This is peculiar to our study site, and we suggest that this may affect the photochemical reactivity of NO3-, by preventing the release of products, or providing a reactive medium for newly formed HONO. In fresh snow, the NO3- ion is probably present as dissolved or adsorbed HNO3 and yet, no HONO emissions were observed. We speculate that HONO formation from NO3- photolysis may involve electron transfer reactions of NO2 from photosensitized organics and that fresh snows at our site had insufficient concentrations of adequate organic compounds to favor this reaction. |
format |
Article in Journal/Newspaper |
author |
Beine, HJ Amoroso, A Domine, F King, Martin Nardino, M Ianniello, A France, JL |
author_facet |
Beine, HJ Amoroso, A Domine, F King, Martin Nardino, M Ianniello, A France, JL |
author_sort |
Beine, HJ |
title |
Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica |
title_short |
Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica |
title_full |
Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica |
title_fullStr |
Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica |
title_full_unstemmed |
Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica |
title_sort |
surprisingly small hono emissions from snow surfaces at browning pass, antarctica |
publishDate |
2006 |
url |
https://repository.royalholloway.ac.uk/items/3eca6ff1-1748-44a9-fabb-93a97461cda7/7/ |
long_lat |
ENVELOPE(164.050,164.050,-74.617,-74.617) ENVELOPE(163.983,163.983,-74.600,-74.600) |
geographic |
Browning Browning Pass South Pole |
geographic_facet |
Browning Browning Pass South Pole |
genre |
Antarc* Antarctica Sea ice South pole South pole |
genre_facet |
Antarc* Antarctica Sea ice South pole South pole |
op_source |
Atmospheric Chemistry and Physics, 6 |
op_relation |
file://localhost/Users/martin/Documents/Papers/2006/Beine/Atmos%20Chem%20Phys%202006%20Beine-1.pdf https://repository.royalholloway.ac.uk/items/3eca6ff1-1748-44a9-fabb-93a97461cda7/7/ |
_version_ |
1766268106560241664 |