Hutterli, Manuel A.; Röthlisberger, Regine; Bales, Roger C. (1999). Atmosphere-to-snow-to-firn transfer studies of HCHO at Summit, Greenland. Geophysical Research Letters, 26(12), pp. 1691-1694. American Geophysical Union 10.1029/1999GL900327
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Formaldehyde (HCHO) measurements in snow, firn, atmosphere, and air in the open pore space of the firn (firn air) at Summit, Greenland, in June 1996 show that the top snow layers are a HCHO source. HCHO concentrations in fresh snow are higher than those in equilibrium with atmospheric concentrations, resulting in HCHO degassing in the days to weeks following snowfall. Maximum HCHO concentrations in firn air were 1.5–2.2 ppbv, while the mean atmospheric HCHO concentration 1 m above the surface was 0.23 ppbv. Apparent HCHO fluxes out of the snow are a plausible explanation for the discrepancy between the 0.1 ppbv atmospheric concentration predicted by photochemical modeling and the measurements. HCHO in deeper firn is near equilibrium with the lower tropospheric HCHO concentration at the annual average temperature. Thus HCHO in ice may in fact be linearly related to multi-year average atmospheric concentrations through a temperature dependent partition coefficient.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Climate and Environmental Physics |
UniBE Contributor: |
Hutterli, Manuel |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0094-8276 |
Publisher: |
American Geophysical Union |
Language: |
English |
Submitter: |
BORIS Import 2 |
Date Deposited: |
07 Sep 2021 08:48 |
Last Modified: |
05 Dec 2022 15:52 |
Publisher DOI: |
10.1029/1999GL900327 |
BORIS DOI: |
10.48350/158792 |
URI: |
https://boris.unibe.ch/id/eprint/158792 |
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