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Surface water fCO2 algorithms for the high-latitude Pacific sector of the Southern Ocean
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2012 (English)In: Remote Sensing of Environment, ISSN 0034-4257, E-ISSN 1879-0704, Vol. 119, 184-196 p.Article in journal (Refereed) Published
Abstract [en]

The feasibility of using remotely sensed data jointly with shipboard measurements to estimate the carbon dioxide fugacity in the surface water (fCO2sw) of the Pacific sector of the Southern Polar Ocean (S > 60°S) is evaluated using a data set obtained during austral summer 2006. A comparison between remotely sensed chlorophyll a (chl a) and sea-surface temperature (SST) with in-situ measurements, reveals the largest bias in areas with rapid and large concentration changes such as at the ice edge, the polar front and in the Ross Sea Polynya. The correlation between fCO2sw and SST, chl a, biological productivity estimates and mixed layer depth (MLD) are evaluated, and single and multiple regression methods are used to develop fCO2sw algorithms. Single regressions between the study parameters and fCO2sw show that most of the fCO2sw variability is explained by chl a. The Multi-Parameter Linear regressions were used to create fCO2sw algorithms derived from field measurements, and using solely remote-sensing products. Based on the best fits from the two data sets fCO2sw estimates have a root means square deviation of ± 14 Όatm and coefficient of determination of 0.82. The addition of satellite derived estimates of biological productivity in the algorithm does not significantly improve the fit. We use the algorithm with remotely sensed chl a and SST data to produce an fCO2sw map for the entire high-latitude Southern Ocean south of 55°S. We analyze and discuss the seasonal and spatial robustness of the algorithm based on the remotely sensed data and compare with climatologic fCO2sw data.

Place, publisher, year, edition, pages
2012. Vol. 119, 184-196 p.
Keyword [en]
Seasonal ice zone, Oceanic CO2 uptake, Seasonal variability, Validation of satellite data, Biological CO2 drawdown, Western Antarctica, Polar Oceans
National Category
Natural Sciences
Research subject
SWEDARP 2006/07, Oden Southern Ocean 2006/07
Identifiers
URN: urn:nbn:se:polar:diva-2185DOI: 10.1016/j.rse.2011.12.020OAI: oai:DiVA.org:polar-2185DiVA: diva2:854846
Available from: 2015-09-18 Created: 2015-09-18 Last updated: 2016-11-21

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Publisher's full texthttp://www.sciencedirect.com/science/article/pii/S0034425712000089
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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • text
  • asciidoc
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