Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland
Concentration measurements of nitric oxide (NO), nitrogen dioxide (NO 2), nitrous acid (HONO), nitric acid (HNO3), formaldehyde (HCHO), hydrogen peroxide (H2O2), formic acid (HCOOH) and acetic acid (CH3COOH) were performed in air filtered through the pore spaces of the surface snowpack (firn air) at...
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2004
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ftcdlib:oai:escholarship.org/ark:/13030/qt93h406w0 2023-05-15T16:27:18+02:00 Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland Jacobi, HW Bales, RC Honrath, RE Peterson, MC Dibb, JE Swanson, AL Albert, MR 1687 - 1697 2004-04-01 https://escholarship.org/uc/item/93h406w0 unknown eScholarship, University of California qt93h406w0 https://escholarship.org/uc/item/93h406w0 public Atmospheric Environment, vol 38, iss 12 trace gases air-snow exchange firn air polar atmospheric chemistry Greenland Meteorology & Atmospheric Sciences Environmental Engineering Atmospheric Sciences Statistics article 2004 ftcdlib 2021-06-20T14:23:24Z Concentration measurements of nitric oxide (NO), nitrogen dioxide (NO 2), nitrous acid (HONO), nitric acid (HNO3), formaldehyde (HCHO), hydrogen peroxide (H2O2), formic acid (HCOOH) and acetic acid (CH3COOH) were performed in air filtered through the pore spaces of the surface snowpack (firn air) at Summit, Greenland, in summer 2000. In general, firn air concentrations of NO, NO2, HONO, HCHO, HCOOH, and CH3COOH were enhanced compared to concentrations in the atmospheric boundary layer above the snow. Only HNO3 and H 2O2 normally exhibited lower concentrations in the firn air. In most cases differences were highest during the day and lowest during nighttime hours. Shading experiments showed a good agreement with a photochemical NOx source in the surface snow. Patterns of H 2O2, CH3COOH, and HNO3 observed within the surface snow-firn air system imply that the number of molecules in the snow greatly exceeded that in the firn air. Deduced partitioning indicates that the largest fractions of the acids were present at the ice grain-air interface. In all cases, the number of molecules located at the interface was significantly higher than the amount in the firn air. Therefore, snow surface area and surface coverage are important parameters, which must be considered for the interpretation of firn air concentrations. © 2004 Elsevier Ltd. All rights reserved. Article in Journal/Newspaper Greenland University of California: eScholarship Greenland |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
trace gases air-snow exchange firn air polar atmospheric chemistry Greenland Meteorology & Atmospheric Sciences Environmental Engineering Atmospheric Sciences Statistics |
spellingShingle |
trace gases air-snow exchange firn air polar atmospheric chemistry Greenland Meteorology & Atmospheric Sciences Environmental Engineering Atmospheric Sciences Statistics Jacobi, HW Bales, RC Honrath, RE Peterson, MC Dibb, JE Swanson, AL Albert, MR Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland |
topic_facet |
trace gases air-snow exchange firn air polar atmospheric chemistry Greenland Meteorology & Atmospheric Sciences Environmental Engineering Atmospheric Sciences Statistics |
description |
Concentration measurements of nitric oxide (NO), nitrogen dioxide (NO 2), nitrous acid (HONO), nitric acid (HNO3), formaldehyde (HCHO), hydrogen peroxide (H2O2), formic acid (HCOOH) and acetic acid (CH3COOH) were performed in air filtered through the pore spaces of the surface snowpack (firn air) at Summit, Greenland, in summer 2000. In general, firn air concentrations of NO, NO2, HONO, HCHO, HCOOH, and CH3COOH were enhanced compared to concentrations in the atmospheric boundary layer above the snow. Only HNO3 and H 2O2 normally exhibited lower concentrations in the firn air. In most cases differences were highest during the day and lowest during nighttime hours. Shading experiments showed a good agreement with a photochemical NOx source in the surface snow. Patterns of H 2O2, CH3COOH, and HNO3 observed within the surface snow-firn air system imply that the number of molecules in the snow greatly exceeded that in the firn air. Deduced partitioning indicates that the largest fractions of the acids were present at the ice grain-air interface. In all cases, the number of molecules located at the interface was significantly higher than the amount in the firn air. Therefore, snow surface area and surface coverage are important parameters, which must be considered for the interpretation of firn air concentrations. © 2004 Elsevier Ltd. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Jacobi, HW Bales, RC Honrath, RE Peterson, MC Dibb, JE Swanson, AL Albert, MR |
author_facet |
Jacobi, HW Bales, RC Honrath, RE Peterson, MC Dibb, JE Swanson, AL Albert, MR |
author_sort |
Jacobi, HW |
title |
Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland |
title_short |
Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland |
title_full |
Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland |
title_fullStr |
Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland |
title_full_unstemmed |
Reactive trace gases measured in the interstitial air of surface snow at Summit, Greenland |
title_sort |
reactive trace gases measured in the interstitial air of surface snow at summit, greenland |
publisher |
eScholarship, University of California |
publishDate |
2004 |
url |
https://escholarship.org/uc/item/93h406w0 |
op_coverage |
1687 - 1697 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Atmospheric Environment, vol 38, iss 12 |
op_relation |
qt93h406w0 https://escholarship.org/uc/item/93h406w0 |
op_rights |
public |
_version_ |
1766016428181291008 |