Dissolution of calcium carbonate: observations and model results in the North Atlantic
International audience We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons. The study relies on observations from the open subpolar North Atlantic [sNA] and on a 3-D biogeochemical model. The sNA is particularly well suited for observation-based...
Main Authors: | , , , , , |
---|---|
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
|
Subjects: | |
Online Access: | https://hal.science/hal-00297854 https://hal.science/hal-00297854/document https://hal.science/hal-00297854/file/bgd-3-1715-2006.pdf |
id |
ftinsu:oai:HAL:hal-00297854v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-00297854v1 2023-11-12T04:21:50+01:00 Dissolution of calcium carbonate: observations and model results in the North Atlantic Friis, K. Najjar, R. G. Follows, M. J. Dutkiewicz, S. Körtzinger, A. Johnson, K. M. PennState Meteorology Department Pennsylvania State University (Penn State) Penn State System-Penn State System Massachusetts Institute of Technology (MIT) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) 2006-10-18 https://hal.science/hal-00297854 https://hal.science/hal-00297854/document https://hal.science/hal-00297854/file/bgd-3-1715-2006.pdf en eng HAL CCSD European Geosciences Union hal-00297854 https://hal.science/hal-00297854 https://hal.science/hal-00297854/document https://hal.science/hal-00297854/file/bgd-3-1715-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-00297854 Biogeosciences Discussions, 2006, 3 (5), pp.1715-1738 [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2006 ftinsu 2023-10-25T16:28:26Z International audience We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons. The study relies on observations from the open subpolar North Atlantic [sNA] and on 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 and do not indicate 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 Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Friis, K. Najjar, R. G. Follows, M. J. Dutkiewicz, S. Körtzinger, A. Johnson, K. M. Dissolution of calcium carbonate: observations and model results in the North Atlantic |
topic_facet |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience We investigate the significance of in situ dissolution of calcium carbonate above its saturation horizons. The study relies on observations from the open subpolar North Atlantic [sNA] and on 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 and do not indicate 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. |
author2 |
PennState Meteorology Department Pennsylvania State University (Penn State) Penn State System-Penn State System Massachusetts Institute of Technology (MIT) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) |
format |
Article in Journal/Newspaper |
author |
Friis, K. Najjar, R. G. Follows, M. J. Dutkiewicz, S. Körtzinger, A. Johnson, K. M. |
author_facet |
Friis, K. Najjar, R. G. Follows, M. J. Dutkiewicz, S. Körtzinger, A. Johnson, K. M. |
author_sort |
Friis, K. |
title |
Dissolution of calcium carbonate: observations and model results in the North Atlantic |
title_short |
Dissolution of calcium carbonate: observations and model results in the North Atlantic |
title_full |
Dissolution of calcium carbonate: observations and model results in the North Atlantic |
title_fullStr |
Dissolution of calcium carbonate: observations and model results in the North Atlantic |
title_full_unstemmed |
Dissolution of calcium carbonate: observations and model results in the North Atlantic |
title_sort |
dissolution of calcium carbonate: observations and model results in the north atlantic |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00297854 https://hal.science/hal-00297854/document https://hal.science/hal-00297854/file/bgd-3-1715-2006.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-00297854 Biogeosciences Discussions, 2006, 3 (5), pp.1715-1738 |
op_relation |
hal-00297854 https://hal.science/hal-00297854 https://hal.science/hal-00297854/document https://hal.science/hal-00297854/file/bgd-3-1715-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782337079938646016 |