These data were collected by the University of Montana and Montana
State University to support the Upper Clark Fork River restoration
monitoring project supported by the US NSF Long Term Research in
Environmental Biology (LTREB) program. The original analytical intent
for these data was to assess the response of river metabolic regime to
the floodplain restoration via inference of whole-ecosystem metabolism
from the daily variation in carbon dioxide concentrations. Data are
primarily measurements of dissolved carbon dioxide, pH, electrical
conductivity, and temperature in well-mixed river thalweg water.
Additional miscellaneous data were collected for quality control. Data
are from late in the 2017 field season. Data were collected on the
Upper Clark Fork River (USGS HUC 17010201) at the Galen and Racetrack
sites northeast of Anaconda, Montana, USA. High frequency carbon
dioxide and pH data were collected using field deployments SAMI
sensors from Sunburst Sensors (Missoula, Montana, USA). Electrical
conductivity data was collected with a HOBO sensor from Onset Computer
Corporation (Bourne, Massachusetts, USA).