Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic
We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons using observations from the open subpolar North Atlantic [sNA] and to a lesser extent a 3-D biogeochemical model. The sNA is particularly well suited for observation-based detections of in situ,...
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ftdoajarticles:oai:doaj.org/article:f7865a57f7dc4f4cb202bdf99a19d6fc 2023-05-15T17:28:31+02:00 Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic K. Friis R. G. Najjar M. J. Follows S. Dutkiewicz A. Körtzinger K. M. Johnson 2007-01-01T00:00:00Z https://doaj.org/article/f7865a57f7dc4f4cb202bdf99a19d6fc EN eng Copernicus Publications http://www.biogeosciences.net/4/205/2007/bg-4-205-2007.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/f7865a57f7dc4f4cb202bdf99a19d6fc Biogeosciences, Vol 4, Iss 2, Pp 205-213 (2007) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2007 ftdoajarticles 2022-12-31T06:03:26Z We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons using observations from the open subpolar North Atlantic [sNA] and to a lesser extent a 3-D biogeochemical model. The sNA is particularly well suited for observation-based detections of in situ, i.e. shallow-depth CaCO 3 dissolution [SDCCD] as it is a region of high CaCO 3 production, deep CaCO 3 saturation horizons, and precisely-defined pre-formed alkalinity. Based on the analysis of a comprehensive alkalinity data set we find that SDCCD does not appear to be a significant process in the open sNA. The results from the model support the observational findings by indicating that there is not a significant need of SDCCD to explain observed patterns of alkalinity in the North Atlantic. Instead our investigation points to the importance of mixing processes for the redistribution of alkalinity from dissolution of CaCO 3 from below its saturation horizons. However, mixing has recently been neglected for a number of studies that called for SDCCD in the sNA and on global scale. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles |
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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 K. Friis R. G. Najjar M. J. Follows S. Dutkiewicz A. Körtzinger K. M. Johnson Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons using observations from the open subpolar North Atlantic [sNA] and to a lesser extent a 3-D biogeochemical model. The sNA is particularly well suited for observation-based detections of in situ, i.e. shallow-depth CaCO 3 dissolution [SDCCD] as it is a region of high CaCO 3 production, deep CaCO 3 saturation horizons, and precisely-defined pre-formed alkalinity. Based on the analysis of a comprehensive alkalinity data set we find that SDCCD does not appear to be a significant process in the open sNA. The results from the model support the observational findings by indicating that there is not a significant need of SDCCD to explain observed patterns of alkalinity in the North Atlantic. Instead our investigation points to the importance of mixing processes for the redistribution of alkalinity from dissolution of CaCO 3 from below its saturation horizons. However, mixing has recently been neglected for a number of studies that called for SDCCD in the sNA and on global scale. |
format |
Article in Journal/Newspaper |
author |
K. Friis R. G. Najjar M. J. Follows S. Dutkiewicz A. Körtzinger K. M. Johnson |
author_facet |
K. Friis R. G. Najjar M. J. Follows S. Dutkiewicz A. Körtzinger K. M. Johnson |
author_sort |
K. Friis |
title |
Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic |
title_short |
Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic |
title_full |
Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic |
title_fullStr |
Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic |
title_full_unstemmed |
Dissolution of calcium carbonate: observations and model results in the subpolar North Atlantic |
title_sort |
dissolution of calcium carbonate: observations and model results in the subpolar north atlantic |
publisher |
Copernicus Publications |
publishDate |
2007 |
url |
https://doaj.org/article/f7865a57f7dc4f4cb202bdf99a19d6fc |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Biogeosciences, Vol 4, Iss 2, Pp 205-213 (2007) |
op_relation |
http://www.biogeosciences.net/4/205/2007/bg-4-205-2007.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/f7865a57f7dc4f4cb202bdf99a19d6fc |
_version_ |
1766121249046528000 |