ctd 9495pal 08nov94-27feb95 CTD (conductivity, temperature, depth) profiles in the Palmer Basin sampling grid. depth(m) temperature(degC) salinity() flag depth-from pressure(db) in saltwater at 64.75S latitude. salinity-from conductivity and temperature using IPTS-68 Twice a week when possible. The Seabird CTD (SEACAT SBE 19-03; sn 195125-0913) was profiled free-fall from surface to near bottom from a rubber zodiac. SeaSoft software on the pc was used to collect the data. The instrument samples at a rate of 2 Hz. With a lowering rate of ~.5m/sec, there are approximately 4 samples per meter. The SeaSoft program datcnv produces ascii converted files in the field. Alignment values of c0=-.30 and dnt=-.30sec were used. The loopedit process (default minimum=.2m/sec) flags wild values defined as outside two standard deviations on the first pass or 20 standard deviation on the second pass. The celltm default values (alpha=.03; 1/beta=9.0) correct for thermostatic anomoly. Prelimanary plots were generated on site using the plotting option of the SeaSoft seasave program. These plots are stored with the cast card information binders at CRSEO and SIO. At the end of field work, converted files are transfered to unix platforms for susequent processing including despiking where threshold values include (cond co=.01; temp to=.05; trans xm=.54; fluor fl=.15). Salinity is calculated using IPTS68 temperature values. A moving average (9pt) is applied and values recalculated for each scan. Seasonal coverage of Palmer Basin by sampling twice a week on a stations A through H sequence where all stations are within the 2mile safe boating limit. Data was recorded continuously during the profile so the up and down casts are recorded into the same file Surface water samples were usually taken for cholorophyll analysis. The ctd/optics zodiac (ROZE) was usually accompanied by another zodiac from which 3 to 6 water samples were taken from the water column for chlorophyll, hplc pigment and nutrient analysis. In addition a surface water sample for chlorophyll was usually taken from the ROZE. ctd, temperature, salinity ascii pc floppy online lter ~lter/9495pal/ctd/ts/* Raymond C. Smith Karen S. Baker Janice Jones Janice Jones Phil Handley Janice Jones Phil Handley 20dec96 Conductivity, temperature, depth recorder operating manual. SEACAT SBE 19-03, Sea-Bird Electronics, 1808-136th Place NE, Bellevue, Wash. 98005 CTD Data Acquisition Software, Seasoft version 3.5a. Sea-Bird Electronics, 1808-136th Place NE, Bellevue, Wash. 98005 CTD Data Acquisition Software, Seasoft version 4.006, Sea-Bird Electronics, 1808-136th Place NE, Bellevue, Wash. 98005 Smith, RC, JL Jones, LB Quetin, RR Ross, KS Baker, WA Kozlowski, M Vernet, WR Fraser, 1996. Palmer LTER: Annual Season Sampling on Station. Antarctic Journal of the United States (accepted). Smith, RC, LB Quetin, JL Jones, DM Menzies, 1996. Palmer LTER: Small Boat Design for Water Column Sampling. Antarctic Journal of the United States (accepted). Data spikes marked from Seasoft processing with flag=-999. Data inspected visually by plot. Core measurments available two years after the season. Citation acknowledgement: "Data from the Palmer LTER data archive were supported by Office of Polar Programs, NSF (OPP-9011927)."