Measurements of pernitric acid at the South Pole during ISCAT 2000
The first measurements of pernitric acid at the South Pole were performed during the second Investigation of Sulfur Chemistry in the Antarctic Troposphere (ISCAT 2000). Observed HO2NO2 concentrations averaged 25 pptv. Simple steady-state calculations constrained by measurements show that the lifetim...
Main Authors: | , , , , , , , , , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
University of New Hampshire Scholars' Repository
2002
|
Subjects: | |
Online Access: | https://scholars.unh.edu/earthsci_facpub/143 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1142&context=earthsci_facpub |
id |
ftuninhampshire:oai:scholars.unh.edu:earthsci_facpub-1142 |
---|---|
record_format |
openpolar |
spelling |
ftuninhampshire:oai:scholars.unh.edu:earthsci_facpub-1142 2023-05-15T13:41:56+02:00 Measurements of pernitric acid at the South Pole during ISCAT 2000 Slusher, D Huey, L Gregory Tanner, D Chen, G Davis, D D Buhr, Martin Nowak, J Eisele, Fred Kosciuch, E Mauldin, R L Lefer, Barry Shetter, R E Dibb, Jack E. 2002-11-01T08:00:00Z application/pdf https://scholars.unh.edu/earthsci_facpub/143 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1142&context=earthsci_facpub unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/earthsci_facpub/143 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1142&context=earthsci_facpub Copyright 2002 by the American Geophysical Union. Earth Sciences Scholarship Atmospheric Sciences text 2002 ftuninhampshire 2023-01-30T21:34:20Z The first measurements of pernitric acid at the South Pole were performed during the second Investigation of Sulfur Chemistry in the Antarctic Troposphere (ISCAT 2000). Observed HO2NO2 concentrations averaged 25 pptv. Simple steady-state calculations constrained by measurements show that the lifetime of pernitric acid was largely controlled by dry deposition, with thermal decomposition becoming increasingly important at warmer temperatures. We determined that the pernitric acid equilibrium constant is less uncertain than indicated in the literature. One consequence of pernitric acid deposition to the snow surface is that it is an important sink for both NOx and HOx. Another is that the photochemistry of HO2NO2 in the Antarctic snowpack may be a NOx source in addition to nitrate photolysis. This might be one of the important differences in snow photochemistry between the South Pole and warmer polar sites. Text Antarc* Antarctic South pole South pole University of New Hampshire: Scholars Repository Antarctic The Antarctic South Pole |
institution |
Open Polar |
collection |
University of New Hampshire: Scholars Repository |
op_collection_id |
ftuninhampshire |
language |
unknown |
topic |
Atmospheric Sciences |
spellingShingle |
Atmospheric Sciences Slusher, D Huey, L Gregory Tanner, D Chen, G Davis, D D Buhr, Martin Nowak, J Eisele, Fred Kosciuch, E Mauldin, R L Lefer, Barry Shetter, R E Dibb, Jack E. Measurements of pernitric acid at the South Pole during ISCAT 2000 |
topic_facet |
Atmospheric Sciences |
description |
The first measurements of pernitric acid at the South Pole were performed during the second Investigation of Sulfur Chemistry in the Antarctic Troposphere (ISCAT 2000). Observed HO2NO2 concentrations averaged 25 pptv. Simple steady-state calculations constrained by measurements show that the lifetime of pernitric acid was largely controlled by dry deposition, with thermal decomposition becoming increasingly important at warmer temperatures. We determined that the pernitric acid equilibrium constant is less uncertain than indicated in the literature. One consequence of pernitric acid deposition to the snow surface is that it is an important sink for both NOx and HOx. Another is that the photochemistry of HO2NO2 in the Antarctic snowpack may be a NOx source in addition to nitrate photolysis. This might be one of the important differences in snow photochemistry between the South Pole and warmer polar sites. |
format |
Text |
author |
Slusher, D Huey, L Gregory Tanner, D Chen, G Davis, D D Buhr, Martin Nowak, J Eisele, Fred Kosciuch, E Mauldin, R L Lefer, Barry Shetter, R E Dibb, Jack E. |
author_facet |
Slusher, D Huey, L Gregory Tanner, D Chen, G Davis, D D Buhr, Martin Nowak, J Eisele, Fred Kosciuch, E Mauldin, R L Lefer, Barry Shetter, R E Dibb, Jack E. |
author_sort |
Slusher, D |
title |
Measurements of pernitric acid at the South Pole during ISCAT 2000 |
title_short |
Measurements of pernitric acid at the South Pole during ISCAT 2000 |
title_full |
Measurements of pernitric acid at the South Pole during ISCAT 2000 |
title_fullStr |
Measurements of pernitric acid at the South Pole during ISCAT 2000 |
title_full_unstemmed |
Measurements of pernitric acid at the South Pole during ISCAT 2000 |
title_sort |
measurements of pernitric acid at the south pole during iscat 2000 |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2002 |
url |
https://scholars.unh.edu/earthsci_facpub/143 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1142&context=earthsci_facpub |
geographic |
Antarctic The Antarctic South Pole |
geographic_facet |
Antarctic The Antarctic South Pole |
genre |
Antarc* Antarctic South pole South pole |
genre_facet |
Antarc* Antarctic South pole South pole |
op_source |
Earth Sciences Scholarship |
op_relation |
https://scholars.unh.edu/earthsci_facpub/143 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1142&context=earthsci_facpub |
op_rights |
Copyright 2002 by the American Geophysical Union. |
_version_ |
1766160739328851968 |