Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2
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 pCO(2) collected as part of the Drake...
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ftncar:oai:drupal-site.org:articles_21764 2023-07-30T04:03:12+02:00 Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2 Fay, Amanda R. (author) Lovenduski, Nicole S. (author) McKinley, Galen A. (author) Munro, David R. (author) Sweeney, Colm (author) Gray, Alison R. (author) Landschützer, Peter (author) Stephens, Britton B. (author) Takahashi, Taro (author) Williams, Nancy (author) 2018-06-25 https://doi.org/10.5194/bg-15-3841-2018 en eng Biogeosciences--Biogeosciences--1726-4189 SOCCOM float data - Snapshot 2018-03-06. In Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Float Data Archive--10.6075/J0PG1PX7 A 30 years observation-based global monthly gridded sea surface pCO2 product from 1982 through 2011--10.3334/CDIAC/OTG.SPCO2_1982_2011_ETH_SOMFFN articles:21764 ark:/85065/d7nv9n2t doi:10.5194/bg-15-3841-2018 Copyright 2018 Author(s). This work is licensed under a Creative Commons Attribution 4.0 International license. article Text 2018 ftncar https://doi.org/10.5194/bg-15-3841-2018 2023-07-17T18:25:15Z 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 pCO(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 pCO(2), and by inference the carbon flux in this region. Here, we utilize available pCO(2) observations to evaluate how the seasonal cycle, interannual variability, and long-term trends in surface ocean pCO(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 pCO(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 pCO(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 pCO(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 pCO(2) to be representative of pCO(2) and its variability up to several hundred kilometers away from the region. We also compare DPT data from 2016 and 2017 to contemporaneous pCO(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 OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Southern Ocean Drake Passage Biogeosciences 15 12 3841 3855 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
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 pCO(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 pCO(2), and by inference the carbon flux in this region. Here, we utilize available pCO(2) observations to evaluate how the seasonal cycle, interannual variability, and long-term trends in surface ocean pCO(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 pCO(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 pCO(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 pCO(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 pCO(2) to be representative of pCO(2) and its variability up to several hundred kilometers away from the region. We also compare DPT data from 2016 and 2017 to contemporaneous pCO(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 ... |
author2 |
Fay, Amanda R. (author) Lovenduski, Nicole S. (author) McKinley, Galen A. (author) Munro, David R. (author) Sweeney, Colm (author) Gray, Alison R. (author) Landschützer, Peter (author) Stephens, Britton B. (author) Takahashi, Taro (author) Williams, Nancy (author) |
format |
Article in Journal/Newspaper |
title |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2 |
spellingShingle |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2 |
title_short |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2 |
title_full |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2 |
title_fullStr |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2 |
title_full_unstemmed |
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2 |
title_sort |
utilizing the drake passage time-series to understand variability and change in subpolar southern ocean pco2 |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-15-3841-2018 |
geographic |
Southern Ocean Drake Passage |
geographic_facet |
Southern Ocean Drake Passage |
genre |
Drake Passage Southern Ocean |
genre_facet |
Drake Passage Southern Ocean |
op_relation |
Biogeosciences--Biogeosciences--1726-4189 SOCCOM float data - Snapshot 2018-03-06. In Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Float Data Archive--10.6075/J0PG1PX7 A 30 years observation-based global monthly gridded sea surface pCO2 product from 1982 through 2011--10.3334/CDIAC/OTG.SPCO2_1982_2011_ETH_SOMFFN articles:21764 ark:/85065/d7nv9n2t doi:10.5194/bg-15-3841-2018 |
op_rights |
Copyright 2018 Author(s). This work is licensed under a Creative Commons Attribution 4.0 International license. |
op_doi |
https://doi.org/10.5194/bg-15-3841-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
12 |
container_start_page |
3841 |
op_container_end_page |
3855 |
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1772814148527194112 |