ctd 93aug 23aug93-23sep93 Selected temperature vertical profiles. depth (m) temperature (degC) conductivity (degC) potential temperature The stations are separated by 5km. The profile measurements are reduced to one observation per meter. The CTD system on the Polar Duke is a SeaBird SBE9 with a pumped salinity sensor. SeaBird software is used to reduce the raw observations to useable units. The programs used with the parameters as suggested in the software manual include: DATCNV, SPLIT,WILDEDIT, FILTER, ALIGNCTD, CELLTM, LOOPEDIT,BINAVG, DERIVE. Calibration files are specific to a dataset. The complete binary and .cnv files are saved. Only the downcast is reduced to bin averaged values. An 11 meter depth window is used on the buoyency frequency calculation. Selected casts during night time operations. The salinity cell often had ice crystals in it which caused the conductivity to be lower than it should be. The ice typically melted somewhere between 80 and 120 m and salinity could be taken to be reliable after that depth. temperature, potential temperature, ctd There are converted files produced by the seabird postprocessing software and standard depth files created by spline interpolation of the temperature to one meter depths and to standard depths. ODU online lter ~lter/lterdata/93aug/ctd/evt* John Klinck John Klinck John Klinck Raw data logged electronically. John Klinck John Klinck Jan97 SeaBird CTD conductivity, temperature, depth recorder operating manual. serial number 195125-0913; SeaBird (206)643-9954. SeaBird Data Acquisition Software Version 4.015/4.022 Salinity samples are taken near the bottom in deep water to calibrate the salinity sensor. The ctd was calibrated in 1992. Bottle salinities are determined by the AutoSal at Palmer Station. Salinity samples were taken at a limited number of stations. Core measurments available after two years. Citation acknowledgement: "Data from the Palmer LTER data archive were supported by Office of Polar Programs, NSF (OPP-9011927)."