Document Type



Virginia Institute of Marine Science

Publication Date


Data Access

Data files available below.


These are discrete observations of total dissolved inorganic carbon (DIC) and alkalinity (TA), and associated computed CO2-system parameters, from samples collected throughout the Chesapeake Bay mainstem between 2016 and 2018. Samples were collected on board the R/V Kerhin in Maryland and the R/V Fay Slover in Virginia at a subset of fixed stations in collaboration with the Chesapeake Bay Water Quality Monitoring Program. Samples were analyzed following standard procedures at the Virginia Institute of Marine Science. The DIC and TA data were then used to compute the remaining CO2-system parameters (pH, CO2 partial pressure (pCO2), and carbonate saturation state). A detailed description of sample collection and analytical methods is given Friedman et al., 2019.


There is one comma separated file (csv) per cruise; the name of each file refers to the cruise number assigned by the Chesapeake Bay Monitoring Program. Each variable is structured with rows matching the depth variable, and columns matching the station variable. Where data is unavailable for a particular station and/or depth, the entry is ‘NaN’. Variable names are in the first row; units are given in the second row. The table below lists all variables: variables appended with ‘CBP’ were measured by the Chesapeake Bay Monitoring Program and the data was obtained from their online data repository; variables appended by ‘VIMS’ were measured, or calculated, at the Virginia Institute of Marine Science (VIMS).



CO2-system; Chesapeake Bay Mainstem; Dissolved Inorganic Carbon; alkalinity; pH; CO2 partial pressure; carbonate saturation state; Water Quality; Chesapeake Bay Water Quality Monitoring Program

Associated Publications

Friedman, J.R., Shadwick, E.H., Friedrichs, M.A.M., Najjar, R.G., De Meo, O.A., Da, F., and Smith, J.L. (2020). Seasonal variability of the CO2-system in a large coastal plain estuary, JGR Oceans v.125(1), e2019JC015609. DOI:. 10.1029/2019JC015609


This research was funded by the National Science Foundation (grant #OCE-1537013 and OCE-1536996) and supported by the Chesapeake Bay Monitoring Program, the Virginia Department of Environmental Quality (VA DEQ), Old Dominion University, and the Maryland Department of Natural Resources (MD DNR). (230 kB)
Cruise files

Included in

Oceanography Commons