C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos
The equilibrium partitioning of formaldehyde (HCHO) between air and snow was studied in a series of laboratory experiments conducted at 51C, 151C, and 351C, in order to understand how partitioning of HCHO between air and polar snow varies with temperature, and thus seasonally on the ice sheet. Measu...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.2412 |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.579.2412 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.579.2412 2023-05-15T16:29:09+02:00 C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos John F. Burkhart Manuel A. Hutterli Roger C. Bales The Pennsylvania State University CiteSeerX Archives http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.2412 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.2412 Metadata may be used without restrictions as long as the oai identifier remains attached to it. https://eng.ucmerced.edu/people/rbales/CV/PubsJ/76/ text ftciteseerx 2016-01-08T12:54:04Z The equilibrium partitioning of formaldehyde (HCHO) between air and snow was studied in a series of laboratory experiments conducted at 51C, 151C, and 351C, in order to understand how partitioning of HCHO between air and polar snow varies with temperature, and thus seasonally on the ice sheet. Measured partitioning coefficients were 56, 93, and 245mol l1 atm1 for 51C, 151C and 351C, respectively, showing a similar trend as the values previously estimated from field observations. Estimates of the pseudo-first-order rate coefficient for air–snow exchange for the same three temperatures were 4.1 104, 1.1 104, and 1.1 105 s1, respectively. This implies a time scale for air–snow equilibration of the order of hours to days for HCHO accumulated at or near the ice–air interface on snow grains. Comparing the current laboratory partitioning coefficients with those estimated from measurements of air and freshly fallen snow in Greenland during summer demonstrates that the snow is supersaturated and should degas HCHO to the surrounding air. During this degassing, polar snow should be a significant source of HCHO to the lower Text Greenland Ice Sheet Unknown Greenland |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
The equilibrium partitioning of formaldehyde (HCHO) between air and snow was studied in a series of laboratory experiments conducted at 51C, 151C, and 351C, in order to understand how partitioning of HCHO between air and polar snow varies with temperature, and thus seasonally on the ice sheet. Measured partitioning coefficients were 56, 93, and 245mol l1 atm1 for 51C, 151C and 351C, respectively, showing a similar trend as the values previously estimated from field observations. Estimates of the pseudo-first-order rate coefficient for air–snow exchange for the same three temperatures were 4.1 104, 1.1 104, and 1.1 105 s1, respectively. This implies a time scale for air–snow equilibration of the order of hours to days for HCHO accumulated at or near the ice–air interface on snow grains. Comparing the current laboratory partitioning coefficients with those estimated from measurements of air and freshly fallen snow in Greenland during summer demonstrates that the snow is supersaturated and should degas HCHO to the surrounding air. During this degassing, polar snow should be a significant source of HCHO to the lower |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
John F. Burkhart Manuel A. Hutterli Roger C. Bales |
spellingShingle |
John F. Burkhart Manuel A. Hutterli Roger C. Bales C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos |
author_facet |
John F. Burkhart Manuel A. Hutterli Roger C. Bales |
author_sort |
John F. Burkhart |
title |
C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos |
title_short |
C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos |
title_full |
C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos |
title_fullStr |
C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos |
title_full_unstemmed |
C.: Partitioning of formaldehyde between air and ice at −35◦C to −5◦C, Atmos |
title_sort |
c.: partitioning of formaldehyde between air and ice at −35◦c to −5◦c, atmos |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.2412 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
https://eng.ucmerced.edu/people/rbales/CV/PubsJ/76/ |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.2412 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766018840341250048 |