Investigating possible causes of the observed diurnal variability in Antarctic NOy
The occurence of a diurnal variability in measured total oxidised nitrogen (NOy) was observed at Neumayer, Antarctica, (70 degrees 39'8, 8 degrees 15'W) during a recent summer measurement campaign. Minima and maxims occurred in the early morning/early evening respectively, with the amplitu...
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ftnerc:oai:nora.nerc.ac.uk:10157 2023-05-15T13:45:10+02:00 Investigating possible causes of the observed diurnal variability in Antarctic NOy Weller, R. Minikin, A. Konig-langlo, G. Schrems, O. Jones, A.E. Wolff, E.W. Anderson, P.S. 1999-09 http://nora.nerc.ac.uk/id/eprint/10157/ https://agupubs.onlinelibrary.wiley.com/doi/10.1029/1999GL900608 unknown American Geophysical Union Weller, R.; Minikin, A.; Konig-langlo, G.; Schrems, O.; Jones, A.E. orcid:0000-0002-2040-4841 Wolff, E.W.; Anderson, P.S. 1999 Investigating possible causes of the observed diurnal variability in Antarctic NOy. Geophysical Research Letters, 26 (18). 2853-2856. https://doi.org/10.1029/1999GL900608 <https://doi.org/10.1029/1999GL900608> Meteorology and Climatology Atmospheric Sciences Publication - Article PeerReviewed 1999 ftnerc https://doi.org/10.1029/1999GL900608 2023-02-04T19:26:32Z The occurence of a diurnal variability in measured total oxidised nitrogen (NOy) was observed at Neumayer, Antarctica, (70 degrees 39'8, 8 degrees 15'W) during a recent summer measurement campaign. Minima and maxims occurred in the early morning/early evening respectively, with the amplitude of the cycle around 40% of the daily mean NOy values. Given that this campaign was the first to attempt NOy measurements on the Antarctic continent, it is not presently clear whether this is an Antarctic-wide phenomenon, or local to Neumayer. A similar cycle was observed for HNO3, although HNO3 concentrations and fluctuations are too small to account for all of the NOy variability. In this paper we investigate possible mechanisms that might cause such diurnal signals, focussing on the influence of local meteorology and also of the snowpack. Exchange processes at the air/snow interface appear to dominate the observed NOy variability, although an influence from the changing surface inversion strength exists. These findings have important implications in understanding and hence correctly interpreting ice core nitrate data. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Neumayer Geophysical Research Letters 26 18 2853 2856 |
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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 Weller, R. Minikin, A. Konig-langlo, G. Schrems, O. Jones, A.E. Wolff, E.W. Anderson, P.S. Investigating possible causes of the observed diurnal variability in Antarctic NOy |
topic_facet |
Meteorology and Climatology Atmospheric Sciences |
description |
The occurence of a diurnal variability in measured total oxidised nitrogen (NOy) was observed at Neumayer, Antarctica, (70 degrees 39'8, 8 degrees 15'W) during a recent summer measurement campaign. Minima and maxims occurred in the early morning/early evening respectively, with the amplitude of the cycle around 40% of the daily mean NOy values. Given that this campaign was the first to attempt NOy measurements on the Antarctic continent, it is not presently clear whether this is an Antarctic-wide phenomenon, or local to Neumayer. A similar cycle was observed for HNO3, although HNO3 concentrations and fluctuations are too small to account for all of the NOy variability. In this paper we investigate possible mechanisms that might cause such diurnal signals, focussing on the influence of local meteorology and also of the snowpack. Exchange processes at the air/snow interface appear to dominate the observed NOy variability, although an influence from the changing surface inversion strength exists. These findings have important implications in understanding and hence correctly interpreting ice core nitrate data. |
format |
Article in Journal/Newspaper |
author |
Weller, R. Minikin, A. Konig-langlo, G. Schrems, O. Jones, A.E. Wolff, E.W. Anderson, P.S. |
author_facet |
Weller, R. Minikin, A. Konig-langlo, G. Schrems, O. Jones, A.E. Wolff, E.W. Anderson, P.S. |
author_sort |
Weller, R. |
title |
Investigating possible causes of the observed diurnal variability in Antarctic NOy |
title_short |
Investigating possible causes of the observed diurnal variability in Antarctic NOy |
title_full |
Investigating possible causes of the observed diurnal variability in Antarctic NOy |
title_fullStr |
Investigating possible causes of the observed diurnal variability in Antarctic NOy |
title_full_unstemmed |
Investigating possible causes of the observed diurnal variability in Antarctic NOy |
title_sort |
investigating possible causes of the observed diurnal variability in antarctic noy |
publisher |
American Geophysical Union |
publishDate |
1999 |
url |
http://nora.nerc.ac.uk/id/eprint/10157/ https://agupubs.onlinelibrary.wiley.com/doi/10.1029/1999GL900608 |
geographic |
Antarctic The Antarctic Neumayer |
geographic_facet |
Antarctic The Antarctic Neumayer |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_relation |
Weller, R.; Minikin, A.; Konig-langlo, G.; Schrems, O.; Jones, A.E. orcid:0000-0002-2040-4841 Wolff, E.W.; Anderson, P.S. 1999 Investigating possible causes of the observed diurnal variability in Antarctic NOy. Geophysical Research Letters, 26 (18). 2853-2856. https://doi.org/10.1029/1999GL900608 <https://doi.org/10.1029/1999GL900608> |
op_doi |
https://doi.org/10.1029/1999GL900608 |
container_title |
Geophysical Research Letters |
container_volume |
26 |
container_issue |
18 |
container_start_page |
2853 |
op_container_end_page |
2856 |
_version_ |
1766214015958122496 |