Empirical algorithms are developed using high-quality GO-SHIP hydrographic measurements of commonly measured parameters (temperature, salinity, pressure, nitrate, and oxygen) that estimate pH in the Pacific sector of the Southern Ocean. The coefficients of determination, R-2, are 0.98 for pH from nitrate (pH(N)) and 0.97 for pH from oxygen (pH(Ox)) with RMS errors of 0.010 and 0.008, respectively. These algorithms are applied to Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) biogeochemical profiling floats, which include novel sensors (pH, nitrate, oxygen, fluorescence, and backscatter). These algorithms are used to estimate pH on floats with no pH sensors and to validate and adjust pH sensor data from floats with pH sensors. The adjusted float data provide, for the first time, seasonal cycles in surface pH on weekly resolution that range from 0.05 to 0.08 on weekly resolution for the Pacific sector of the Southern Ocean.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/614732 |
| Date | 16 April 2016 |
| Creators | Williams, N. L., Juranek, L. W., Johnson, K. S., Feely, R. A., Riser, S. C., Talley, L. D., Russell, J. L., Sarmiento, J. L., Wanninkhof, R. |
| Contributors | Univ Arizona, Dept Geosci, College of Earth, Ocean, and Atmospheric Sciences; Oregon State University; Corvallis Oregon USA, College of Earth, Ocean, and Atmospheric Sciences; Oregon State University; Corvallis Oregon USA, Monterey Bay Aquarium Research Institute; Moss Landing California USA, Pacific Marine Environmental Laboratory; National Oceanic and Atmospheric Administration; Seattle Washington USA, School of Oceanography; University of Washington; Seattle Washington USA, Scripps Institution of Oceanography; University of California, San Diego; La Jolla California USA, Department of Geosciences; University of Arizona; Tucson Arizona USA, Program in Atmospheric and Oceanic Sciences; Princeton University; Princeton New Jersey USA, Atlantic Oceanographic and Meteorological Laboratory; National Oceanic and Atmospheric Administration; Miami Florida USA |
| Publisher | AMER GEOPHYSICAL UNION |
| Source Sets | University of Arizona |
| Language | English |
| Detected Language | English |
| Type | Article |
| Rights | ©2016. American Geophysical Union. All Rights Reserved. |
| Relation | http://doi.wiley.com/10.1002/2016GL068539 |
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