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Space Observation of Carbon Dioxide Partial Pressure
We have developed and validated a statistical model to estimate the partial
pressure (or fugacity) of carbon dioxide at sea surface from space-based
observations of sea surface temperature, chlorophyll, and salinity. More than
a quarter million in situ measurements coincident with satellite data were
compiled to train and validate the model. Details can be found in
Liu and Xie (2014).
The outputs are found to be sensitive to variability from intra-seasonal to
inter-annual and from equatorial to high-latitude oceans. They can capture known
phenomena, such as, annual spring bloom at high latitudes, inter-annual episode
of El Nino, and westward propagation of tropical instability waves.
The feasibility of using a single algorithm to map the partial pressure over
global oceans for all seasons is demonstrated.
The figures show collocated pCO2s measurements with satellite observations
during 2002-2010 (top), and bin-averaged pCO2s from model versus observed pCO2s
(bottom).
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