Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2
The Southern Ocean is highly under-sampled for the purpose of assessing total carbon uptake and its variability. Since this region dominates the mean global ocean sink for anthropogenic carbon, understanding temporal change is critical. Underway measurements of p CO 2 collected as part of the Drake...
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Online Access: | https://doi.org/10.5194/bg-15-3841-2018 https://doaj.org/article/b1a01b716ed54dd8bd90e8331e1d2c1c |
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ftdoajarticles:oai:doaj.org/article:b1a01b716ed54dd8bd90e8331e1d2c1c 2023-05-15T16:02:23+02:00 Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2 A. R. Fay N. S. Lovenduski G. A. McKinley D. R. Munro C. Sweeney A. R. Gray P. Landschützer B. B. Stephens T. Takahashi N. Williams 2018-06-01T00:00:00Z https://doi.org/10.5194/bg-15-3841-2018 https://doaj.org/article/b1a01b716ed54dd8bd90e8331e1d2c1c EN eng Copernicus Publications https://www.biogeosciences.net/15/3841/2018/bg-15-3841-2018.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-15-3841-2018 1726-4170 1726-4189 https://doaj.org/article/b1a01b716ed54dd8bd90e8331e1d2c1c Biogeosciences, Vol 15, Pp 3841-3855 (2018) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/bg-15-3841-2018 2022-12-31T10:22:12Z The Southern Ocean is highly under-sampled for the purpose of assessing total carbon uptake and its variability. Since this region dominates the mean global ocean sink for anthropogenic carbon, understanding temporal change is critical. Underway measurements of p CO 2 collected as part of the Drake Passage Time-series (DPT) program that began in 2002 inform our understanding of seasonally changing air–sea gradients in p CO 2 , and by inference the carbon flux in this region. Here, we utilize available p CO 2 observations to evaluate how the seasonal cycle, interannual variability, and long-term trends in surface ocean p CO 2 in the Drake Passage region compare to that of the broader subpolar Southern Ocean. Our results indicate that the Drake Passage is representative of the broader region in both seasonality and long-term p CO 2 trends, as evident through the agreement of timing and amplitude of seasonal cycles as well as trend magnitudes both seasonally and annually. The high temporal density of sampling by the DPT is critical to constraining estimates of the seasonal cycle of surface p CO 2 in this region, as winter data remain sparse in areas outside of the Drake Passage. An increase in winter data would aid in reduction of uncertainty levels. On average over the period 2002–2016, data show that carbon uptake has strengthened with annual surface ocean p CO 2 trends in the Drake Passage and the broader subpolar Southern Ocean less than the global atmospheric trend. Analysis of spatial correlation shows Drake Passage p CO 2 to be representative of p CO 2 and its variability up to several hundred kilometers away from the region. We also compare DPT data from 2016 and 2017 to contemporaneous p CO 2 estimates from autonomous biogeochemical floats deployed as part of the Southern Ocean Carbon and Climate Observations and Modeling project (SOCCOM) so as to highlight the opportunity for evaluating data collected on autonomous observational platforms. Though SOCCOM floats sparsely sample the Drake Passage region for ... Article in Journal/Newspaper Drake Passage Southern Ocean Directory of Open Access Journals: DOAJ Articles Drake Passage Southern Ocean Biogeosciences 15 12 3841 3855 |
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Open Polar |
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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 A. R. Fay N. S. Lovenduski G. A. McKinley D. R. Munro C. Sweeney A. R. Gray P. Landschützer B. B. Stephens T. Takahashi N. Williams Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2 |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
The Southern Ocean is highly under-sampled for the purpose of assessing total carbon uptake and its variability. Since this region dominates the mean global ocean sink for anthropogenic carbon, understanding temporal change is critical. Underway measurements of p CO 2 collected as part of the Drake Passage Time-series (DPT) program that began in 2002 inform our understanding of seasonally changing air–sea gradients in p CO 2 , and by inference the carbon flux in this region. Here, we utilize available p CO 2 observations to evaluate how the seasonal cycle, interannual variability, and long-term trends in surface ocean p CO 2 in the Drake Passage region compare to that of the broader subpolar Southern Ocean. Our results indicate that the Drake Passage is representative of the broader region in both seasonality and long-term p CO 2 trends, as evident through the agreement of timing and amplitude of seasonal cycles as well as trend magnitudes both seasonally and annually. The high temporal density of sampling by the DPT is critical to constraining estimates of the seasonal cycle of surface p CO 2 in this region, as winter data remain sparse in areas outside of the Drake Passage. An increase in winter data would aid in reduction of uncertainty levels. On average over the period 2002–2016, data show that carbon uptake has strengthened with annual surface ocean p CO 2 trends in the Drake Passage and the broader subpolar Southern Ocean less than the global atmospheric trend. Analysis of spatial correlation shows Drake Passage p CO 2 to be representative of p CO 2 and its variability up to several hundred kilometers away from the region. We also compare DPT data from 2016 and 2017 to contemporaneous p CO 2 estimates from autonomous biogeochemical floats deployed as part of the Southern Ocean Carbon and Climate Observations and Modeling project (SOCCOM) so as to highlight the opportunity for evaluating data collected on autonomous observational platforms. Though SOCCOM floats sparsely sample the Drake Passage region for ... |
format |
Article in Journal/Newspaper |
author |
A. R. Fay N. S. Lovenduski G. A. McKinley D. R. Munro C. Sweeney A. R. Gray P. Landschützer B. B. Stephens T. Takahashi N. Williams |
author_facet |
A. R. Fay N. S. Lovenduski G. A. McKinley D. R. Munro C. Sweeney A. R. Gray P. Landschützer B. B. Stephens T. Takahashi N. Williams |
author_sort |
A. R. Fay |
title |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2 |
title_short |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2 |
title_full |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2 |
title_fullStr |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2 |
title_full_unstemmed |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean p CO 2 |
title_sort |
utilizing the drake passage time-series to understand variability and change in subpolar southern ocean p co 2 |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-15-3841-2018 https://doaj.org/article/b1a01b716ed54dd8bd90e8331e1d2c1c |
geographic |
Drake Passage Southern Ocean |
geographic_facet |
Drake Passage Southern Ocean |
genre |
Drake Passage Southern Ocean |
genre_facet |
Drake Passage Southern Ocean |
op_source |
Biogeosciences, Vol 15, Pp 3841-3855 (2018) |
op_relation |
https://www.biogeosciences.net/15/3841/2018/bg-15-3841-2018.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-15-3841-2018 1726-4170 1726-4189 https://doaj.org/article/b1a01b716ed54dd8bd90e8331e1d2c1c |
op_doi |
https://doi.org/10.5194/bg-15-3841-2018 |
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Biogeosciences |
container_volume |
15 |
container_issue |
12 |
container_start_page |
3841 |
op_container_end_page |
3855 |
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