Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean
Distribution of calcium carbonate saturation state (Ω) was observed in the Chukchi Sea in autumn 2012 and early summer 2013. Ω in bottom water ranged from 0.3 to 2.0 for aragonite and from 0.5 to 3.2 for calcite in 2012. In 2013, Ω in bottom water was 1.1–2.8 for aragonite and 1.7–4.4 for calcite. A...
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Copernicus Publications
2016
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00011165 2023-05-15T15:06:59+02:00 Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean Yamamoto-Kawai, Michiyo Mifune, Takahisa Kikuchi, Takashi Nishino, Shigeto 2016-11 electronic https://doi.org/10.5194/bg-13-6155-2016 https://noa.gwlb.de/receive/cop_mods_00011165 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011122/bg-13-6155-2016.pdf https://bg.copernicus.org/articles/13/6155/2016/bg-13-6155-2016.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-13-6155-2016 https://noa.gwlb.de/receive/cop_mods_00011165 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011122/bg-13-6155-2016.pdf https://bg.copernicus.org/articles/13/6155/2016/bg-13-6155-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/bg-13-6155-2016 2022-02-08T22:56:40Z Distribution of calcium carbonate saturation state (Ω) was observed in the Chukchi Sea in autumn 2012 and early summer 2013. Ω in bottom water ranged from 0.3 to 2.0 for aragonite and from 0.5 to 3.2 for calcite in 2012. In 2013, Ω in bottom water was 1.1–2.8 for aragonite and 1.7–4.4 for calcite. Aragonite and calcite undersaturation was found in high productivity regions in autumn 2012 but not in early summer 2013. Comparison with other parameters has indicated that biological processes – respiration and photosynthesis – are major factors controlling the regional and temporal variability of Ω. From these ship-based observations, we have obtained empirical equations to reconstruct Ω from temperature, salinity and apparent oxygen utilization. Using 2-year-round mooring data and these equations, we have reconstructed seasonal variation of Ω in bottom water in Hope Valley, a biological hotspot in the southern Chukchi Sea. Estimated Ω was high in spring and early summer, decreased in later summer, and remained relatively low in winter. Calculations indicated a possibility that bottom water could have been undersaturated for aragonite on an intermittent basis even in the pre-industrial period, and that anthropogenic CO2 has extended the period of aragonite undersaturation to more than 2-fold longer by now. Article in Journal/Newspaper Arctic Arctic Ocean Chukchi Chukchi Sea Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Chukchi Sea Hope Valley ENVELOPE(-171.000,-171.000,68.833,68.833) Biogeosciences 13 22 6155 6169 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Yamamoto-Kawai, Michiyo Mifune, Takahisa Kikuchi, Takashi Nishino, Shigeto Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean |
topic_facet |
article Verlagsveröffentlichung |
description |
Distribution of calcium carbonate saturation state (Ω) was observed in the Chukchi Sea in autumn 2012 and early summer 2013. Ω in bottom water ranged from 0.3 to 2.0 for aragonite and from 0.5 to 3.2 for calcite in 2012. In 2013, Ω in bottom water was 1.1–2.8 for aragonite and 1.7–4.4 for calcite. Aragonite and calcite undersaturation was found in high productivity regions in autumn 2012 but not in early summer 2013. Comparison with other parameters has indicated that biological processes – respiration and photosynthesis – are major factors controlling the regional and temporal variability of Ω. From these ship-based observations, we have obtained empirical equations to reconstruct Ω from temperature, salinity and apparent oxygen utilization. Using 2-year-round mooring data and these equations, we have reconstructed seasonal variation of Ω in bottom water in Hope Valley, a biological hotspot in the southern Chukchi Sea. Estimated Ω was high in spring and early summer, decreased in later summer, and remained relatively low in winter. Calculations indicated a possibility that bottom water could have been undersaturated for aragonite on an intermittent basis even in the pre-industrial period, and that anthropogenic CO2 has extended the period of aragonite undersaturation to more than 2-fold longer by now. |
format |
Article in Journal/Newspaper |
author |
Yamamoto-Kawai, Michiyo Mifune, Takahisa Kikuchi, Takashi Nishino, Shigeto |
author_facet |
Yamamoto-Kawai, Michiyo Mifune, Takahisa Kikuchi, Takashi Nishino, Shigeto |
author_sort |
Yamamoto-Kawai, Michiyo |
title |
Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean |
title_short |
Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean |
title_full |
Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean |
title_fullStr |
Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean |
title_full_unstemmed |
Seasonal variation of CaCO3 saturation state in bottom water of a biological hotspot in the Chukchi Sea, Arctic Ocean |
title_sort |
seasonal variation of caco3 saturation state in bottom water of a biological hotspot in the chukchi sea, arctic ocean |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/bg-13-6155-2016 https://noa.gwlb.de/receive/cop_mods_00011165 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011122/bg-13-6155-2016.pdf https://bg.copernicus.org/articles/13/6155/2016/bg-13-6155-2016.pdf |
long_lat |
ENVELOPE(-171.000,-171.000,68.833,68.833) |
geographic |
Arctic Arctic Ocean Chukchi Sea Hope Valley |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Hope Valley |
genre |
Arctic Arctic Ocean Chukchi Chukchi Sea |
genre_facet |
Arctic Arctic Ocean Chukchi Chukchi Sea |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-13-6155-2016 https://noa.gwlb.de/receive/cop_mods_00011165 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011122/bg-13-6155-2016.pdf https://bg.copernicus.org/articles/13/6155/2016/bg-13-6155-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-13-6155-2016 |
container_title |
Biogeosciences |
container_volume |
13 |
container_issue |
22 |
container_start_page |
6155 |
op_container_end_page |
6169 |
_version_ |
1766338574444134400 |