Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves
In the summer of 2005, we sampled surface water and measured pH and total alkalinity (A T ) underway aboard IB Oden along the Northwest Passage from Cape Farewell (South Greenland) to the Chukchi Sea. We investigated the variability of carbonate system parameters, focusing particularly on carbonate...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2009
|
Subjects: | |
Online Access: | https://doaj.org/article/a5123d14e3024794b65a55cf343f4628 |
id |
ftdoajarticles:oai:doaj.org/article:a5123d14e3024794b65a55cf343f4628 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:a5123d14e3024794b65a55cf343f4628 2023-05-15T13:24:41+02:00 Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves A. Fransson M. Chierici 2009-11-01T00:00:00Z https://doaj.org/article/a5123d14e3024794b65a55cf343f4628 EN eng Copernicus Publications http://www.biogeosciences.net/6/2421/2009/bg-6-2421-2009.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/a5123d14e3024794b65a55cf343f4628 Biogeosciences, Vol 6, Iss 11, Pp 2421-2431 (2009) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2009 ftdoajarticles 2022-12-31T01:52:56Z In the summer of 2005, we sampled surface water and measured pH and total alkalinity (A T ) underway aboard IB Oden along the Northwest Passage from Cape Farewell (South Greenland) to the Chukchi Sea. We investigated the variability of carbonate system parameters, focusing particularly on carbonate concentration [CO 3 2− ] and calcium carbonate saturation states, as related to freshwater addition, biological processes and physical upwelling. Measurements on A T , pH at 15°C, salinity (S) and sea surface temperature (SST), were used to calculate total dissolved inorganic carbon (C T ), [CO 3 2− ] and the saturation of aragonite (ΩAr) and calcite (ΩCa) in the surface water. The same parameters were measured in the water column of the Bering Strait. Some surface waters in the Canadian Arctic Archipelago (CAA) and on the Mackenzie shelf (MS) were found to be undersaturated with respect to aragonite (ΩAr<1). In these areas, surface water was low in A T and C T (<1500 μmol kg −1 ) relative to seawater and showed low [CO 3 2− ]. The low saturation states were probably due to the likely the effect of dilution due to freshwater addition by sea ice melt (CAA) and river runoff (MS). High A T and C T and low pH, corresponded with the lowest [CO 3 2− ], ΩAr and ΩCa, observed near Cape Bathurst and along the South Chukchi Peninsula. This was linked to the physical upwelling of subsurface water with elevated CO 2 . The highest surface ΩAr and ΩCa of 3.0 and 4.5, respectively, were found on the Chukchi Sea shelf and in the cold water north of Wrangel Island, which is heavily influenced by high CO 2 drawdown and lower C T from intense biological production. In the western Bering Strait, the cold and saline Anadyr Current carries water that is enriched in A T and C T from enhanced organic matter remineralization, resulting in the lowest ΩAr (~1.2) of the area. Article in Journal/Newspaper Anadyr Anadyr' Arctic Archipelago Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Cape Bathurst Cape Farewell Chukchi Chukchi Peninsula Chukchi Sea Greenland Mackenzie Shelf Northwest passage Sea ice Wrangel Island Directory of Open Access Journals: DOAJ Articles Anadyr ENVELOPE(177.510,177.510,64.734,64.734) Anadyr’ ENVELOPE(176.233,176.233,64.882,64.882) Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Cape Bathurst ENVELOPE(-128.068,-128.068,70.579,70.579) Chukchi Sea Greenland Northwest Passage Wrangel Island ENVELOPE(-179.385,-179.385,71.244,71.244) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 A. Fransson M. Chierici Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
In the summer of 2005, we sampled surface water and measured pH and total alkalinity (A T ) underway aboard IB Oden along the Northwest Passage from Cape Farewell (South Greenland) to the Chukchi Sea. We investigated the variability of carbonate system parameters, focusing particularly on carbonate concentration [CO 3 2− ] and calcium carbonate saturation states, as related to freshwater addition, biological processes and physical upwelling. Measurements on A T , pH at 15°C, salinity (S) and sea surface temperature (SST), were used to calculate total dissolved inorganic carbon (C T ), [CO 3 2− ] and the saturation of aragonite (ΩAr) and calcite (ΩCa) in the surface water. The same parameters were measured in the water column of the Bering Strait. Some surface waters in the Canadian Arctic Archipelago (CAA) and on the Mackenzie shelf (MS) were found to be undersaturated with respect to aragonite (ΩAr<1). In these areas, surface water was low in A T and C T (<1500 μmol kg −1 ) relative to seawater and showed low [CO 3 2− ]. The low saturation states were probably due to the likely the effect of dilution due to freshwater addition by sea ice melt (CAA) and river runoff (MS). High A T and C T and low pH, corresponded with the lowest [CO 3 2− ], ΩAr and ΩCa, observed near Cape Bathurst and along the South Chukchi Peninsula. This was linked to the physical upwelling of subsurface water with elevated CO 2 . The highest surface ΩAr and ΩCa of 3.0 and 4.5, respectively, were found on the Chukchi Sea shelf and in the cold water north of Wrangel Island, which is heavily influenced by high CO 2 drawdown and lower C T from intense biological production. In the western Bering Strait, the cold and saline Anadyr Current carries water that is enriched in A T and C T from enhanced organic matter remineralization, resulting in the lowest ΩAr (~1.2) of the area. |
format |
Article in Journal/Newspaper |
author |
A. Fransson M. Chierici |
author_facet |
A. Fransson M. Chierici |
author_sort |
A. Fransson |
title |
Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves |
title_short |
Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves |
title_full |
Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves |
title_fullStr |
Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves |
title_full_unstemmed |
Calcium carbonate saturation in the surface water of the Arctic Ocean: undersaturation in freshwater influenced shelves |
title_sort |
calcium carbonate saturation in the surface water of the arctic ocean: undersaturation in freshwater influenced shelves |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doaj.org/article/a5123d14e3024794b65a55cf343f4628 |
long_lat |
ENVELOPE(177.510,177.510,64.734,64.734) ENVELOPE(176.233,176.233,64.882,64.882) ENVELOPE(-128.068,-128.068,70.579,70.579) ENVELOPE(-179.385,-179.385,71.244,71.244) |
geographic |
Anadyr Anadyr’ Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Cape Bathurst Chukchi Sea Greenland Northwest Passage Wrangel Island |
geographic_facet |
Anadyr Anadyr’ Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Cape Bathurst Chukchi Sea Greenland Northwest Passage Wrangel Island |
genre |
Anadyr Anadyr' Arctic Archipelago Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Cape Bathurst Cape Farewell Chukchi Chukchi Peninsula Chukchi Sea Greenland Mackenzie Shelf Northwest passage Sea ice Wrangel Island |
genre_facet |
Anadyr Anadyr' Arctic Archipelago Arctic Arctic Ocean Bering Strait Canadian Arctic Archipelago Cape Bathurst Cape Farewell Chukchi Chukchi Peninsula Chukchi Sea Greenland Mackenzie Shelf Northwest passage Sea ice Wrangel Island |
op_source |
Biogeosciences, Vol 6, Iss 11, Pp 2421-2431 (2009) |
op_relation |
http://www.biogeosciences.net/6/2421/2009/bg-6-2421-2009.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/a5123d14e3024794b65a55cf343f4628 |
_version_ |
1766380874266312704 |