Coccolithophores and calcite saturation state in the Baltic and Black Seas
International audience The Baltic and Black Seas are both brackish, that is to say both have salinities intermediate between freshwater and seawater. The coccolithophore Emiliania huxleyi is abundant in one, the Black Sea, but absent from the other, the Baltic Sea. Here we present summertime coccoli...
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ftinsu:oai:HAL:hal-00297924v1 2023-11-12T04:23:55+01:00 Coccolithophores and calcite saturation state in the Baltic and Black Seas Tyrrell, T. Schneider, B. Charalampopoulou, A. Riebesell, U. National Oceanography Centre Southampton (NOC) University of Southampton Leibniz-Institut für Ostseeforschung Warnemünde (IOW) Leibniz Association Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) 2007-10-10 https://hal.science/hal-00297924 https://hal.science/hal-00297924/document https://hal.science/hal-00297924/file/bgd-4-3581-2007.pdf en eng HAL CCSD European Geosciences Union hal-00297924 https://hal.science/hal-00297924 https://hal.science/hal-00297924/document https://hal.science/hal-00297924/file/bgd-4-3581-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-00297924 Biogeosciences Discussions, 2007, 4 (5), pp.3581-3605 [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 2007 ftinsu 2023-10-25T16:28:21Z International audience The Baltic and Black Seas are both brackish, that is to say both have salinities intermediate between freshwater and seawater. The coccolithophore Emiliania huxleyi is abundant in one, the Black Sea, but absent from the other, the Baltic Sea. Here we present summertime coccolithophore measurements confirming this difference, as well as data on the calcium carbonate saturation state of the Baltic Sea. We find that the Baltic Sea becomes undersaturated (or nearly so) in winter, with respect to both the aragonite and calcite mineral forms of CaCO 3 . Data for the Black Sea are more limited, but it appears to remain strongly supersaturated year-round. The absence of E. huxleyi from the Baltic Sea could therefore potentially be explained by dissolution of their coccoliths in winter, suggesting that minimum annual (wintertime) saturation states could be most important in determining future ocean acidification impacts. In addition to this potential importance of winter saturation state, alternative explanations are also possible, either related to differences in salinity or else to differences in silicate concentrations. Article in Journal/Newspaper Ocean acidification Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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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 Tyrrell, T. Schneider, B. Charalampopoulou, A. Riebesell, U. Coccolithophores and calcite saturation state in the Baltic and Black Seas |
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 The Baltic and Black Seas are both brackish, that is to say both have salinities intermediate between freshwater and seawater. The coccolithophore Emiliania huxleyi is abundant in one, the Black Sea, but absent from the other, the Baltic Sea. Here we present summertime coccolithophore measurements confirming this difference, as well as data on the calcium carbonate saturation state of the Baltic Sea. We find that the Baltic Sea becomes undersaturated (or nearly so) in winter, with respect to both the aragonite and calcite mineral forms of CaCO 3 . Data for the Black Sea are more limited, but it appears to remain strongly supersaturated year-round. The absence of E. huxleyi from the Baltic Sea could therefore potentially be explained by dissolution of their coccoliths in winter, suggesting that minimum annual (wintertime) saturation states could be most important in determining future ocean acidification impacts. In addition to this potential importance of winter saturation state, alternative explanations are also possible, either related to differences in salinity or else to differences in silicate concentrations. |
author2 |
National Oceanography Centre Southampton (NOC) University of Southampton Leibniz-Institut für Ostseeforschung Warnemünde (IOW) Leibniz Association Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) |
format |
Article in Journal/Newspaper |
author |
Tyrrell, T. Schneider, B. Charalampopoulou, A. Riebesell, U. |
author_facet |
Tyrrell, T. Schneider, B. Charalampopoulou, A. Riebesell, U. |
author_sort |
Tyrrell, T. |
title |
Coccolithophores and calcite saturation state in the Baltic and Black Seas |
title_short |
Coccolithophores and calcite saturation state in the Baltic and Black Seas |
title_full |
Coccolithophores and calcite saturation state in the Baltic and Black Seas |
title_fullStr |
Coccolithophores and calcite saturation state in the Baltic and Black Seas |
title_full_unstemmed |
Coccolithophores and calcite saturation state in the Baltic and Black Seas |
title_sort |
coccolithophores and calcite saturation state in the baltic and black seas |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00297924 https://hal.science/hal-00297924/document https://hal.science/hal-00297924/file/bgd-4-3581-2007.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-00297924 Biogeosciences Discussions, 2007, 4 (5), pp.3581-3605 |
op_relation |
hal-00297924 https://hal.science/hal-00297924 https://hal.science/hal-00297924/document https://hal.science/hal-00297924/file/bgd-4-3581-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782338535378911232 |