Each unit is deployed for two weeks at a time, and cleaned three times weekly during warm weather and once or twice weekly during cold weather. At the end of each deployment, the unit is replaced with another unit and brought back to the lab where the data is downloaded to a personal computer. The unit is then cleaned, checked, and recalibrated in preparation for redeployment. The raw data is organized and run through a series of programs to obtain daily and weekly averages. Where N is the number of usable data points.
Salinity is computed from the conductivity data with corrections for temperature.
Despite frequent cleanings and recalibration, some sensor drift will occur, mostly due to the fouling that occurs in estuarine waters. Although the data have been edited to exclude obviously bad data points, there is no guarantee that they are completely free of errors. Please use caution when analyzing these data and call any discrepancies to my attention. The dissolved oxygen probes, in particular, have been recording data that is highly variable and often seems suspect. Although every effort has been made to edit these data, some of the remaining data could be erroneous.