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Ocean surface acidity and carbon dioxide (CO2) fugacity (assumed to be the same as partial pressure) at sea (fCO2sea) are critical in quantifying the ocean as the source and sink of the greenhouse gas and the characterization of ocean dynamics and biogeochemistry. We developed and validated a statistical model to estimate fCO2sea using over 200,000 coincident in situ and satellite data in the past. Similarly, we have, recently, trained a statistical model to estimate acidity in the form of pH value, using 20,000 of coincident in situ and satellite data. Decade long estimations of fCO2sea over the global oceans and acidity over the tropical oceans have been produced from spacebased measurements of sea surface temperature, salinity, and chlorophyll. Their temporal-spatial variations, the relation between them, and their relations with ocean dynamics and biogeochemistry are being studied. Their changes in geographical distribution during the recent El Nino/Southern Oscillation and Northern Pacific warming anomaly are revealed. The distinction of climate processes from ocean biogeochemistry is elaborated through the variability of the two parameters.


Liu, W. T., Jet Propulsion Lab., USA,

Xie, X., Jet Propulsion Lab., USA,


Oral presentation

Session #:056
Date: 03/01/2017
Time: 10:00
Location: 305 A/B

Presentation is given by student: No