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CD Organization
This report is divided into seven sections: Acronyms and Abbreviations, 
Disc Contents, Instrument, Methods, Data, Federal Geographic Data 
Committee (FGDC) Metadata, and Trackline. Links at the top and bottom of 
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contained on this disc.

As part of the USGS Climate Change project “Monitoring and modeling of 
Florida Shelf carbonate saturation state and calcification rates: setting 
a baseline for response of ocean acidification on marine habitats” and 
Coastal and Marine Geology Program project ‘Response of Florida Shelf 
Ecosystems to Climate Change’ (PI: Dr. Lisa Robbins), data on surface 
ocean carbonate chemistry were collected along transects on the shallow 
inner west Florida shelf. Through a partnership with the University of 
South Florida (Dr. Robert Byrne), ships have been outfitted with flow-
through instrumentation, specifically the MICA (Multiparameter Inorganic 
Carbon Analyzer) instrumentation (Wang et al., 2007) developed by Dr. 
Robert Byrne and engineers from SRI and the University of South Florida 
College of Marine Science Center for Ocean Technology (more info). The 
system consists of three seawater channels (surface sea water pCO2, TCO2, 
and pH) and an air channel (atmospheric pCO2). All measurements (four 
channels) are based on the same spectrophotometric principles. The system 
can operate continuously with a sampling frequency of ~7 per hour. For 
each sample, all four parameters are measured and recorded 
simultaneously. Conductivity-Temperature-Depth (CTD) measurements were 
performed concurrently. Total alkalinity was sampled at discrete 
stations, providing another level of data robustness. These are critical 
parameters for calculating saturation state and thus calcification 
potential of marine organisms. The data collected will allow USGS, NOAA, 
and USF to map variations in ocean chemistry including carbonate 
saturation states along designated tracks. The USGS is also partnering 
with NOAA and NASA for the modeling of saturation state data.