Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean
Melissa Chierici
(1)
,
Agneta Fransson
(1)
,
Bruno Lansard
(2, 3, 4)
,
Lisa Miller
(5)
,
Alfonso Mucci
(2)
,
Elizabeth Shadwick
(6)
,
Helmuth Thomas
(6)
,
J.-É. Tremblay
(7)
,
Tim Papakyriakou
(8)
1
GU -
Göteborgs Universitet = University of Gothenburg
2 GEOTOP - Centre de recherche sur la dynamique du système Terre
3 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
4 OCEANIS - Océan et Interfaces
5 British Columbia
6 DO - Department of Oceanography [Halifax]
7 ULaval - Université Laval [Québec]
8 Centre for Earth Observation Science [Winnipeg]
2 GEOTOP - Centre de recherche sur la dynamique du système Terre
3 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
4 OCEANIS - Océan et Interfaces
5 British Columbia
6 DO - Department of Oceanography [Halifax]
7 ULaval - Université Laval [Québec]
8 Centre for Earth Observation Science [Winnipeg]
Résumé
[1] We report on measurements across an annual cycle of carbon dioxide system parameters in the polar mixed layer (PML) of the circumpolar flaw lead in the Amundsen Gulf, Arctic Ocean. From these and other properties (nitrate, S, T) of the PML, we found that biological processes (photosynthesis and respiration) accounted for about 50% of the monthly variations in the carbonate ion concentration, [CO 3 2À ] and W, the saturation state of these waters with respect to calcite (W Ca) and aragonite (W Ar). Vertical mixing and salinity changes had equal impacts over the annual cycle. The impact of sea ice meltwater resulted in decreasing W values in summer, but most of this change was offset by the W increase as a result of CO 2 drawdown during biological photosynthesis.
Format du dépôt | Fichier |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean
|
Résumé |
en
[1] We report on measurements across an annual cycle of carbon dioxide system parameters in the polar mixed layer (PML) of the circumpolar flaw lead in the Amundsen Gulf, Arctic Ocean. From these and other properties (nitrate, S, T) of the PML, we found that biological processes (photosynthesis and respiration) accounted for about 50% of the monthly variations in the carbonate ion concentration, [CO 3 2À ] and W, the saturation state of these waters with respect to calcite (W Ca) and aragonite (W Ar). Vertical mixing and salinity changes had equal impacts over the annual cycle. The impact of sea ice meltwater resulted in decreasing W values in summer, but most of this change was offset by the W increase as a result of CO 2 drawdown during biological photosynthesis.
|
Auteur(s) |
Melissa Chierici
1
, Agneta Fransson
1
, Bruno Lansard
2, 3, 4
, Lisa Miller
5
, Alfonso Mucci
2
, Elizabeth Shadwick
6
, Helmuth Thomas
6
, J.-É. Tremblay
7
, Tim Papakyriakou
8
1
GU -
Göteborgs Universitet = University of Gothenburg
( 302859 )
- Box 100, SE-405 30 Göteborg
- Suède
2
GEOTOP -
Centre de recherche sur la dynamique du système Terre
( 320713 )
- Université du Québec à Montréal 201, Président-Kennedy Ave. 7th floor, room PK-7150 Montréal QC H2X 3Y7 Canada
- Canada
3
LSCE -
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
( 518 )
- Bât. 12,
avenue de la Terrasse,
F-91198 GIF-SUR-YVETTE CEDEX
- France
4
OCEANIS -
Océan et Interfaces
( 1007945 )
- LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin.
- France
5
British Columbia
( 303127 )
- Canada
6
DO -
Department of Oceanography [Halifax]
( 27273 )
- 1355 Oxford Street, PO BOX 15000, Halifax, Nova Scotia, Canada, B3H 4R2
- Canada
7
ULaval -
Université Laval [Québec]
( 93488 )
- 2325, rue de l'Université Québec G1V 0A6
- Canada
8
Centre for Earth Observation Science [Winnipeg]
( 419613 )
- University of Manitoba, Department of Environment and Geography, Winnipeg, MB R3T 2N2
- Canada
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2011
|
Volume |
116
|
Page/Identifiant |
0 - 09
|
Domaine(s) |
|
DOI | 10.1029/2011JC007184 |
Origine :
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