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GEOPHYSICAL RESEARCH LETTERS,
VOL. 36,
L24601,
6 PP., 2009
doi:10.1029/2009GL040778
A novel method for determination of aragonite saturation state on the continental shelf of central Oregon using multi-parameter relationships with hydrographic data
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Northwest Fisheries Science Center, NMFS, Newport, Oregon, USA
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, USA
School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, South Korea
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Cooperative Institute for Marine Resources Studies, Oregon State University, Newport, Oregon, USA
We developed a multiple linear regression model to robustly determine aragonite saturation state (Ωarag) from observations of temperature and oxygen (R2 = 0.987, RMS error 0.053), using data collected in the Pacific Northwest region in late May 2007. The seasonal evolution of Ωarag near central Oregon was evaluated by applying the regression model to a monthly (winter)/bi-weekly (summer) water-column hydrographic time-series collected over the shelf and slope in 2007. The Ωarag predicted by the regression model was less than 1, the thermodynamic calcification/dissolution threshold, over shelf/slope bottom waters throughout the entire 2007 upwelling season (May–November), with the Ωarag = 1 horizon shoaling to 30 m by late summer. The persistence of water with Ωarag < 1 on the continental shelf has not been previously noted and could have notable ecological consequences for benthic and pelagic calcifying organisms such as mussels, oysters, abalone, echinoderms, and pteropods.
Received 3 September 2009; accepted 23 November 2009; published 31 December 2009.
Citation: (2009), A novel method for determination of aragonite saturation state on the continental shelf of central Oregon using multi-parameter relationships with hydrographic data, Geophys. Res. Lett., 36, L24601, doi:10.1029/2009GL040778.
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