Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland
Concentrations and fluxes of NOy (total reactive nitrogen), ozone concentrations and fluxes of sensible heat, water vapor, and momentum were measured from May 1 to July 20, 1995 at Summit, Greenland. Median NOy concentrations declined from 947 ppt in May to 444 ppt by July. NOy fluxes were observed...
Published in: | Journal of Geophysical Research: Atmospheres |
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1999
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Online Access: | http://nrs.harvard.edu/urn-3:HUL.InstRepos:14061855 https://doi.org/10.1029/1999JD900192 |
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ftharvardudash:oai:dash.harvard.edu:1/14061855 2023-05-15T15:09:22+02:00 Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland Munger, J. William Jacob, Daniel James Fan, S.-M. Colman, A. S. Dibb, J. E. 1999 application/pdf http://nrs.harvard.edu/urn-3:HUL.InstRepos:14061855 https://doi.org/10.1029/1999JD900192 en_US eng Wiley-Blackwell doi:10.1029/1999JD900192 http://atmos.seas.harvard.edu/people/staff/jwm/summit_fnoy.pdf Journal of Geophysical Research Munger, J. W., D. J. Jacob, S.-M. Fan, A. S. Colman, and J. E. Dibb. 1999. “Concentrations and Snow-Atmosphere Fluxes of Reactive Nitrogen at Summit, Greenland.” Journal of Geophysical Research 104 (D11): 13721. doi:10.1029/1999jd900192. 0148-0227 http://nrs.harvard.edu/urn-3:HUL.InstRepos:14061855 Journal Article 1999 ftharvardudash https://doi.org/10.1029/1999JD900192 https://doi.org/10.1029/1999jd900192 2022-04-05T06:46:44Z Concentrations and fluxes of NOy (total reactive nitrogen), ozone concentrations and fluxes of sensible heat, water vapor, and momentum were measured from May 1 to July 20, 1995 at Summit, Greenland. Median NOy concentrations declined from 947 ppt in May to 444 ppt by July. NOy fluxes were observed into and out of the snow, but the magnitudes were usually below 1 μmol m−2 h−1 because of the low HNO3 concentration and weak turbulence over the snow surface. Some of the highest observed fluxes may be due to temporary storage by equilibrium sorption of peroxyacetylnitrate (PAN) or other organic nitrogen species on ice surfaces in the upper snowpack. Sublimation of snow at the surface or during blowing snow events is associated with efflux of NOy from the snowpack. Because the NOy fluxes during summer at Summit are bidirectional and small in magnitude, the net result of turbulent NOy exchange is insignificant compared to the 2 μmol m−2 d−1 mean input from fresh snow during the summer months. If the arctic NOy reservoir is predominantly PAN (or compounds with similar properties), thermal dissociation of this NOy is sufficient to support the observed flux of nitrate in fresh snow. Very low HNO3 concentrations in the surface layer (1% of total NOy) reflect the poor ventilation of the surface layer over the snowpack combined with the relatively rapid uptake of HNO3 by fog, falling snow, and direct deposition to the snowpack. Engineering and Applied Sciences Version of Record Article in Journal/Newspaper Arctic Greenland Harvard University: DASH - Digital Access to Scholarship at Harvard Arctic Greenland Journal of Geophysical Research: Atmospheres 104 D11 13721 13734 |
institution |
Open Polar |
collection |
Harvard University: DASH - Digital Access to Scholarship at Harvard |
op_collection_id |
ftharvardudash |
language |
English |
description |
Concentrations and fluxes of NOy (total reactive nitrogen), ozone concentrations and fluxes of sensible heat, water vapor, and momentum were measured from May 1 to July 20, 1995 at Summit, Greenland. Median NOy concentrations declined from 947 ppt in May to 444 ppt by July. NOy fluxes were observed into and out of the snow, but the magnitudes were usually below 1 μmol m−2 h−1 because of the low HNO3 concentration and weak turbulence over the snow surface. Some of the highest observed fluxes may be due to temporary storage by equilibrium sorption of peroxyacetylnitrate (PAN) or other organic nitrogen species on ice surfaces in the upper snowpack. Sublimation of snow at the surface or during blowing snow events is associated with efflux of NOy from the snowpack. Because the NOy fluxes during summer at Summit are bidirectional and small in magnitude, the net result of turbulent NOy exchange is insignificant compared to the 2 μmol m−2 d−1 mean input from fresh snow during the summer months. If the arctic NOy reservoir is predominantly PAN (or compounds with similar properties), thermal dissociation of this NOy is sufficient to support the observed flux of nitrate in fresh snow. Very low HNO3 concentrations in the surface layer (1% of total NOy) reflect the poor ventilation of the surface layer over the snowpack combined with the relatively rapid uptake of HNO3 by fog, falling snow, and direct deposition to the snowpack. Engineering and Applied Sciences Version of Record |
format |
Article in Journal/Newspaper |
author |
Munger, J. William Jacob, Daniel James Fan, S.-M. Colman, A. S. Dibb, J. E. |
spellingShingle |
Munger, J. William Jacob, Daniel James Fan, S.-M. Colman, A. S. Dibb, J. E. Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland |
author_facet |
Munger, J. William Jacob, Daniel James Fan, S.-M. Colman, A. S. Dibb, J. E. |
author_sort |
Munger, J. William |
title |
Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland |
title_short |
Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland |
title_full |
Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland |
title_fullStr |
Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland |
title_full_unstemmed |
Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland |
title_sort |
concentrations and snow-atmosphere fluxes of reactive nitrogen at summit, greenland |
publisher |
Wiley-Blackwell |
publishDate |
1999 |
url |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:14061855 https://doi.org/10.1029/1999JD900192 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_relation |
doi:10.1029/1999JD900192 http://atmos.seas.harvard.edu/people/staff/jwm/summit_fnoy.pdf Journal of Geophysical Research Munger, J. W., D. J. Jacob, S.-M. Fan, A. S. Colman, and J. E. Dibb. 1999. “Concentrations and Snow-Atmosphere Fluxes of Reactive Nitrogen at Summit, Greenland.” Journal of Geophysical Research 104 (D11): 13721. doi:10.1029/1999jd900192. 0148-0227 http://nrs.harvard.edu/urn-3:HUL.InstRepos:14061855 |
op_doi |
https://doi.org/10.1029/1999JD900192 https://doi.org/10.1029/1999jd900192 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
104 |
container_issue |
D11 |
container_start_page |
13721 |
op_container_end_page |
13734 |
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1766340572869558272 |