Two decades of inorganic carbon dynamics along the West Antarctic Peninsula
We present 20 years of seawater inorganic carbon measurements collected along the western shelf and slope of the Antarctic Peninsula. Water column observations from summertime cruises and seasonal surface underway pCO2 measurements provide unique insights into the spatial, seasonal, and interannual...
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Copernicus Publications
2015
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00014650 2023-05-15T13:41:02+02:00 Two decades of inorganic carbon dynamics along the West Antarctic Peninsula Hauri, C. Doney, S. C. Takahashi, T. Erickson, M. Jiang, G. Ducklow, H. W. 2015-11 electronic https://doi.org/10.5194/bg-12-6761-2015 https://noa.gwlb.de/receive/cop_mods_00014650 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00014605/bg-12-6761-2015.pdf https://bg.copernicus.org/articles/12/6761/2015/bg-12-6761-2015.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-12-6761-2015 https://noa.gwlb.de/receive/cop_mods_00014650 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00014605/bg-12-6761-2015.pdf https://bg.copernicus.org/articles/12/6761/2015/bg-12-6761-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/bg-12-6761-2015 2022-02-08T22:55:00Z We present 20 years of seawater inorganic carbon measurements collected along the western shelf and slope of the Antarctic Peninsula. Water column observations from summertime cruises and seasonal surface underway pCO2 measurements provide unique insights into the spatial, seasonal, and interannual variability in this dynamic system. Discrete measurements from depths > 2000 m align well with World Ocean Circulation Experiment observations across the time series and underline the consistency of the data set. Surface total alkalinity and dissolved inorganic carbon data showed large spatial gradients, with a concomitant wide range of Ωarag (< 1 up to 3.9). This spatial variability was mainly driven by increasing influence of biological productivity towards the southern end of the sampling grid and meltwater input along the coast towards the northern end. Large inorganic carbon drawdown through biological production in summer caused high near-shore Ωarag despite glacial and sea-ice meltwater input. In support of previous studies, we observed Redfield behavior of regional C / N nutrient utilization, while the C / P (80.5 ± 2.5) and N / P (11.7 ± 0.3) molar ratios were significantly lower than the Redfield elemental stoichiometric values. Seasonal salinity-based predictions of Ωarag suggest that surface waters remained mostly supersaturated with regard to aragonite throughout the study. However, more than 20 % of the predictions for winters and springs between 1999 and 2013 resulted in Ωarag < 1.2. Such low levels of Ωarag may have implications for important organisms such as pteropods. Even though we did not detect any statistically significant long-term trends, the combination of on\-going ocean acidification and freshwater input may soon induce more unfavorable conditions than the ecosystem experiences today. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ocean acidification Sea ice Niedersächsisches Online-Archiv NOA Antarctic Antarctic Peninsula The Antarctic Western Shelf ENVELOPE(164.448,164.448,-77.780,-77.780) Biogeosciences 12 22 6761 6779 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Hauri, C. Doney, S. C. Takahashi, T. Erickson, M. Jiang, G. Ducklow, H. W. Two decades of inorganic carbon dynamics along the West Antarctic Peninsula |
topic_facet |
article Verlagsveröffentlichung |
description |
We present 20 years of seawater inorganic carbon measurements collected along the western shelf and slope of the Antarctic Peninsula. Water column observations from summertime cruises and seasonal surface underway pCO2 measurements provide unique insights into the spatial, seasonal, and interannual variability in this dynamic system. Discrete measurements from depths > 2000 m align well with World Ocean Circulation Experiment observations across the time series and underline the consistency of the data set. Surface total alkalinity and dissolved inorganic carbon data showed large spatial gradients, with a concomitant wide range of Ωarag (< 1 up to 3.9). This spatial variability was mainly driven by increasing influence of biological productivity towards the southern end of the sampling grid and meltwater input along the coast towards the northern end. Large inorganic carbon drawdown through biological production in summer caused high near-shore Ωarag despite glacial and sea-ice meltwater input. In support of previous studies, we observed Redfield behavior of regional C / N nutrient utilization, while the C / P (80.5 ± 2.5) and N / P (11.7 ± 0.3) molar ratios were significantly lower than the Redfield elemental stoichiometric values. Seasonal salinity-based predictions of Ωarag suggest that surface waters remained mostly supersaturated with regard to aragonite throughout the study. However, more than 20 % of the predictions for winters and springs between 1999 and 2013 resulted in Ωarag < 1.2. Such low levels of Ωarag may have implications for important organisms such as pteropods. Even though we did not detect any statistically significant long-term trends, the combination of on\-going ocean acidification and freshwater input may soon induce more unfavorable conditions than the ecosystem experiences today. |
format |
Article in Journal/Newspaper |
author |
Hauri, C. Doney, S. C. Takahashi, T. Erickson, M. Jiang, G. Ducklow, H. W. |
author_facet |
Hauri, C. Doney, S. C. Takahashi, T. Erickson, M. Jiang, G. Ducklow, H. W. |
author_sort |
Hauri, C. |
title |
Two decades of inorganic carbon dynamics along the West Antarctic Peninsula |
title_short |
Two decades of inorganic carbon dynamics along the West Antarctic Peninsula |
title_full |
Two decades of inorganic carbon dynamics along the West Antarctic Peninsula |
title_fullStr |
Two decades of inorganic carbon dynamics along the West Antarctic Peninsula |
title_full_unstemmed |
Two decades of inorganic carbon dynamics along the West Antarctic Peninsula |
title_sort |
two decades of inorganic carbon dynamics along the west antarctic peninsula |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/bg-12-6761-2015 https://noa.gwlb.de/receive/cop_mods_00014650 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00014605/bg-12-6761-2015.pdf https://bg.copernicus.org/articles/12/6761/2015/bg-12-6761-2015.pdf |
long_lat |
ENVELOPE(164.448,164.448,-77.780,-77.780) |
geographic |
Antarctic Antarctic Peninsula The Antarctic Western Shelf |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic Western Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Ocean acidification Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ocean acidification Sea ice |
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-12-6761-2015 https://noa.gwlb.de/receive/cop_mods_00014650 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00014605/bg-12-6761-2015.pdf https://bg.copernicus.org/articles/12/6761/2015/bg-12-6761-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-12-6761-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
22 |
container_start_page |
6761 |
op_container_end_page |
6779 |
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1766145046760914944 |