Estimating Total Alkalinity in the Washington State Coastal Zone: Complexities and Surprising Utility for Ocean Acidification Research

Fassbender, Andrea J.; Alin, Simone R.; Feely, Richard A.; Sutton, Adrienne J.; Newton, Jan A.; Byrne, Robert H.

doi:10.1007/s12237-016-0168-z

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Estimating Total Alkalinity in the Washington State Coastal Zone: Complexities and Surprising Utility for Ocean Acidification Research

2017
By Fassbender, Andrea J. ; Alin, Simone R. ; Feely, Richard A. ; ...
Source: Estuaries and Coasts, 40(2), 404-418.

[PDF-2.63 MB]

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Journal Title:

Estuaries and Coasts
Personal Author:

Fassbender, Andrea J. ; Alin, Simone R. ; Feely, Richard A. ; Sutton, Adrienne J. ; Newton, Jan A. ; ... More +

Fassbender, Andrea J. ; Alin, Simone R. ; Feely, Richard A. ; Sutton, Adrienne J. ; Newton, Jan A. ; Byrne, Robert H. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory) ; JISAO (Joint Institute for the Study of the Atmosphere and Ocean)

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory) ; JISAO (Joint Institute for the Study of the Atmosphere and Ocean) Less -
Description:

Evidence of ocean acidification (OA) throughout the global ocean has galvanized some coastal communities to evaluate carbonate chemistry variations closer to home. An impediment to doing this effectively is that, often, only one carbonate system parameter is measured at a time, while two are required to fully constrain the inorganic carbon chemistry of seawater. In order to leverage the abundant single-carbonate-parameter datasets in Washington State for more rigorous OA research, we have characterized an empirical relationship between total alkalinity (TA) and salinity (TA = 47.7 x S + 647; 1 sigma = +/- 17 mu mol kg(-1)) for regional surface waters (<= 25 m) that is robust in the salinity range from 20 to 35 for all seasons. The relationship was evaluated using 5 years of 3-h contemporaneous observations of salinity, carbon dioxide partial pressure (pCO(2)), and pH from a surface mooring on the outer coast of Washington. In situ pCO(2) observations and salinity-based estimates of TA were used to calculate pH for comparison with in situ pH measurements. On average, the calculated pH values were 0.02 units lower than the measured pH values across multiple pH sensor deployments and showed extremely high fidelity in tracking the measured high-frequency pH variations. Our results indicate that the TA-salinity relationship will be a useful tool for expanding single-carbonate-parameter datasets in Washington State and quality controlling dual pCO(2)-pH time series.
Source:

Estuaries and Coasts, 40(2), 404-418.
DOI:

https://doi.org/10.1007/s12237-016-0168-z
Document Type:

Journal Article
Funding:

Grant no. NA11NOS0120036
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Accepted Manuscript
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Submitted
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urn:sha256:f759a8cf216d09da4aa576ee5f16717a9cb75188e4cac091538e5aa997b95fe1
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https://repository.library.noaa.gov/view/noaa/16499/noaa_16499_DS1.pdf
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Estimating Total Alkalinity in the Washington State Coastal Zone: Complexities and Surprising Utility for Ocean Acidification Research

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