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°39S, 8°15W) during a recent summer measurement campaign. Minima and maxima occurred in the early morning/early evening respectively, with the amplitude of the cycle around 40% o...
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ftawi:oai:epic.awi.de:3328 2023-09-05T13:13:46+02:00 Investigating possible causes of the observed diurnal variability in Antarctic NOy Weller, Rolf Jones, A. E. Wolff, E. W. Minikin, A. Anderson, P. S. König-Langlo, Gert Schrems, Otto 1999 https://epic.awi.de/id/eprint/3328/ https://hdl.handle.net/10013/epic.13911 unknown Weller, R. orcid:0000-0003-4880-5572 , Jones, A. E. , Wolff, E. W. , Minikin, A. , Anderson, P. S. , König-Langlo, G. and Schrems, O. (1999) Investigating possible causes of the observed diurnal variability in Antarctic NOy , Geophysical Research Letters, 26 (18), pp. 2853-2856 . hdl:10013/epic.13911 EPIC3Geophysical Research Letters, 26(18), pp. 2853-2856 Article isiRev 1999 ftawi 2023-08-22T19:43:59Z The occurence of a diurnal variability in measured total oxidised nitrogen (NOy) was observed at Neumayer, Antarctica, (70°39S, 8°15W) during a recent summer measurement campaign. Minima and maxima 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 snow-pack. 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Neumayer The Antarctic |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
The occurence of a diurnal variability in measured total oxidised nitrogen (NOy) was observed at Neumayer, Antarctica, (70°39S, 8°15W) during a recent summer measurement campaign. Minima and maxima 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 snow-pack. 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, Rolf Jones, A. E. Wolff, E. W. Minikin, A. Anderson, P. S. König-Langlo, Gert Schrems, Otto |
spellingShingle |
Weller, Rolf Jones, A. E. Wolff, E. W. Minikin, A. Anderson, P. S. König-Langlo, Gert Schrems, Otto Investigating possible causes of the observed diurnal variability in Antarctic NOy |
author_facet |
Weller, Rolf Jones, A. E. Wolff, E. W. Minikin, A. Anderson, P. S. König-Langlo, Gert Schrems, Otto |
author_sort |
Weller, Rolf |
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 |
publishDate |
1999 |
url |
https://epic.awi.de/id/eprint/3328/ https://hdl.handle.net/10013/epic.13911 |
geographic |
Antarctic Neumayer The Antarctic |
geographic_facet |
Antarctic Neumayer The Antarctic |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_source |
EPIC3Geophysical Research Letters, 26(18), pp. 2853-2856 |
op_relation |
Weller, R. orcid:0000-0003-4880-5572 , Jones, A. E. , Wolff, E. W. , Minikin, A. , Anderson, P. S. , König-Langlo, G. and Schrems, O. (1999) Investigating possible causes of the observed diurnal variability in Antarctic NOy , Geophysical Research Letters, 26 (18), pp. 2853-2856 . hdl:10013/epic.13911 |
_version_ |
1776204927551406080 |