Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99)
Because investigations of PAN at higher southern latitudes are very scarce, we measured surface PAN concentrations for the first time in Antarctica. During the Photochemical Experiment at Neumayer (PEAN'99) campaign mean surface PAN mixing ratios of 13 +/- 7 pptv and maximum values of 48 pptv w...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
PERGAMON-ELSEVIER SCIENCE LTD
2000
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/10153/ |
id |
ftnerc:oai:nora.nerc.ac.uk:10153 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:10153 2023-05-15T13:45:10+02:00 Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99) Jacobi, H.-W. Weller, R. Jones, A.E. Anderson, P.S. Schrems, O. 2000 http://nora.nerc.ac.uk/id/eprint/10153/ unknown PERGAMON-ELSEVIER SCIENCE LTD Jacobi, H.-W.; Weller, R.; Jones, A.E. orcid:0000-0002-2040-4841 Anderson, P.S.; Schrems, O. 2000 Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99). Atmospheric Environment, 34 (29-30). 5235-5247. Meteorology and Climatology Atmospheric Sciences Publication - Article PeerReviewed 2000 ftnerc 2023-02-04T19:26:32Z Because investigations of PAN at higher southern latitudes are very scarce, we measured surface PAN concentrations for the first time in Antarctica. During the Photochemical Experiment at Neumayer (PEAN'99) campaign mean surface PAN mixing ratios of 13 +/- 7 pptv and maximum values of 48 pptv were found. When these PAN mixing ratios were compared to the sum of NOx and inorganic nitrate they were found to be equal or higher. Low ambient air temperatures and low PAN concentrations caused a slow homogeneous PAN decomposition rate of approximately 5 x 10(-2) pptv h(-1) These slow decay rates were not sufficient to firmly establish the simultaneously observed NOx concentrations. In addition, low concentration ratios of [HNO3]/[NOx] imply that the photochemical production of NOx within the snow pack can influence surface NOx mixing ratios in Antarctica. Alternate measurements of PAN mixing ratios at two different heights above the snow surface were performed to derive fluxes between the lower troposphere and the underlying snow pack using calculated friction velocities. Most of the concentration differences were below the precision of the measurements. Therefore, only an upper limit for the PAN flux of +/- 1x10(13) molecules m(-2) s(-1) without a predominant direction can be estimated. However, PAN fluxes below this limit can still influence both the transfer of nitrogen compounds between atmosphere and ice, and the PAN budget in higher southern latitudes. (C) 2000 Elsevier Science Ltd. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Neumayer |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Meteorology and Climatology Atmospheric Sciences |
spellingShingle |
Meteorology and Climatology Atmospheric Sciences Jacobi, H.-W. Weller, R. Jones, A.E. Anderson, P.S. Schrems, O. Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99) |
topic_facet |
Meteorology and Climatology Atmospheric Sciences |
description |
Because investigations of PAN at higher southern latitudes are very scarce, we measured surface PAN concentrations for the first time in Antarctica. During the Photochemical Experiment at Neumayer (PEAN'99) campaign mean surface PAN mixing ratios of 13 +/- 7 pptv and maximum values of 48 pptv were found. When these PAN mixing ratios were compared to the sum of NOx and inorganic nitrate they were found to be equal or higher. Low ambient air temperatures and low PAN concentrations caused a slow homogeneous PAN decomposition rate of approximately 5 x 10(-2) pptv h(-1) These slow decay rates were not sufficient to firmly establish the simultaneously observed NOx concentrations. In addition, low concentration ratios of [HNO3]/[NOx] imply that the photochemical production of NOx within the snow pack can influence surface NOx mixing ratios in Antarctica. Alternate measurements of PAN mixing ratios at two different heights above the snow surface were performed to derive fluxes between the lower troposphere and the underlying snow pack using calculated friction velocities. Most of the concentration differences were below the precision of the measurements. Therefore, only an upper limit for the PAN flux of +/- 1x10(13) molecules m(-2) s(-1) without a predominant direction can be estimated. However, PAN fluxes below this limit can still influence both the transfer of nitrogen compounds between atmosphere and ice, and the PAN budget in higher southern latitudes. (C) 2000 Elsevier Science Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Jacobi, H.-W. Weller, R. Jones, A.E. Anderson, P.S. Schrems, O. |
author_facet |
Jacobi, H.-W. Weller, R. Jones, A.E. Anderson, P.S. Schrems, O. |
author_sort |
Jacobi, H.-W. |
title |
Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99) |
title_short |
Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99) |
title_full |
Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99) |
title_fullStr |
Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99) |
title_full_unstemmed |
Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99) |
title_sort |
peroxyacetyl nitrate (pan) concentrations in the antarctic troposphere measured during the photochemical experiment at neumayer (pean'99) |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2000 |
url |
http://nora.nerc.ac.uk/id/eprint/10153/ |
geographic |
Antarctic The Antarctic Neumayer |
geographic_facet |
Antarctic The Antarctic Neumayer |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Jacobi, H.-W.; Weller, R.; Jones, A.E. orcid:0000-0002-2040-4841 Anderson, P.S.; Schrems, O. 2000 Peroxyacetyl nitrate (PAN) concentrations in the Antarctic troposphere measured during the photochemical experiment at Neumayer (PEAN'99). Atmospheric Environment, 34 (29-30). 5235-5247. |
_version_ |
1766214009271353344 |