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Air‐sea gas transfer in high Arctic fjords

Andersson, Andreas ; Falck, E. ; Sjöblom, A ; Kljun, Natascha LU ; Sahlee, E. ; Omar, A.M. and Rutgersson, A (2017) In Geophysical Research Letters 44. p.2519-2526
Abstract
In Arctic fjords and high‐latitude seas, strong surface cooling dominates during a large part of the year, generating water‐side convection (w* w) and enhanced turbulence in the water. These regions are key areas for the global carbon cycle; thus, a correct description of their air‐sea gas exchange is crucial. CO2 data were measured via the eddy covariance technique in marine Arctic conditions and reveal that water‐side convection has a major impact on the gas transfer velocity. This is observed even at wind speeds as high as 9 m s−1, where convective motions are generally thought to be suppressed by wind‐driven turbulence. The enhanced air‐sea transfer of CO2 caused by water‐side convection nearly doubled the CO2 uptake; after scaled to... (More)
In Arctic fjords and high‐latitude seas, strong surface cooling dominates during a large part of the year, generating water‐side convection (w* w) and enhanced turbulence in the water. These regions are key areas for the global carbon cycle; thus, a correct description of their air‐sea gas exchange is crucial. CO2 data were measured via the eddy covariance technique in marine Arctic conditions and reveal that water‐side convection has a major impact on the gas transfer velocity. This is observed even at wind speeds as high as 9 m s−1, where convective motions are generally thought to be suppressed by wind‐driven turbulence. The enhanced air‐sea transfer of CO2 caused by water‐side convection nearly doubled the CO2 uptake; after scaled to open‐sea conditions the contribution from w* w to the CO2 flux remained as high as 34%. This phenomenon is expected to be highly important for the total carbon uptake in marine Arctic areas. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Geophysical Research Letters
volume
44
pages
2519 - 2526
publisher
American Geophysical Union
external identifiers
  • scopus:85014550684
ISSN
1944-8007
DOI
10.1002/2016GL072373
language
English
LU publication?
no
id
b9368457-dfb6-4bbd-8aa7-ad7d2cb88ee7
date added to LUP
2018-04-16 15:02:22
date last changed
2020-02-12 09:24:54
@article{b9368457-dfb6-4bbd-8aa7-ad7d2cb88ee7,
  abstract     = {In Arctic fjords and high‐latitude seas, strong surface cooling dominates during a large part of the year, generating water‐side convection (w* w) and enhanced turbulence in the water. These regions are key areas for the global carbon cycle; thus, a correct description of their air‐sea gas exchange is crucial. CO2 data were measured via the eddy covariance technique in marine Arctic conditions and reveal that water‐side convection has a major impact on the gas transfer velocity. This is observed even at wind speeds as high as 9 m s−1, where convective motions are generally thought to be suppressed by wind‐driven turbulence. The enhanced air‐sea transfer of CO2 caused by water‐side convection nearly doubled the CO2 uptake; after scaled to open‐sea conditions the contribution from w* w to the CO2 flux remained as high as 34%. This phenomenon is expected to be highly important for the total carbon uptake in marine Arctic areas. },
  author       = {Andersson, Andreas and Falck, E. and Sjöblom, A and Kljun, Natascha and Sahlee, E. and Omar, A.M. and Rutgersson, A},
  issn         = {1944-8007},
  language     = {eng},
  month        = {01},
  pages        = {2519--2526},
  publisher    = {American Geophysical Union},
  series       = {Geophysical Research Letters},
  title        = {Air‐sea gas transfer in high Arctic fjords},
  url          = {http://dx.doi.org/10.1002/2016GL072373},
  doi          = {10.1002/2016GL072373},
  volume       = {44},
  year         = {2017},
}