------------------------------------------------------------------------ ------------------------------------------------------------------------ Hydrology Data Processing Notes -------------------------------------- Cruise SS 11/95 19 March, 1997 - 27 March, 1997 Data processing completed by Rebecca Deed 13/11/96 to 22/11/96 ------- -------------------------------------- Principal Investigator Dr. Bronte Tilbrook and Brian Griffiths, CSIRO Division of Marine Research, Hobart, Tasmania. Summary Following are details of the hydrology processing done for SS9511. See Table 1 for specific edits. Hydrochemists on the voyage were Mark Rayner and David Terhell. 105 CTD stations were completed, from which 468 salinity, 464 oxygen and approximately 500 nutrient samples were analysed (see Hydrochemist's report for more details). The processing was performed by Gary Critchley and Rebecca Deed. It was begun on 13/11/96 and finished on 22/11/96. The navigation data etc was trasferred from the S9511.STA file produced during CTD calibration to the hydrology .DAT files. The sample depths, CTD salinity and CTD temperature data were transferred to the hydrology .DAT files from the HISTCAL.LIS file produced during CTD calibration. During processing, corrections to the data were made as listed in Table 1. Stations which contained no hydrology data and for which the .DAT files were deleted were: 5, 10, 15, 19, 20, 21, 22, 29, 31, 32, 34, 36, 40, 41, 44, 46, 47, 48, 49, 52, 57, 59, 62, 63, 64, 66, 73, 76, 79, 80, 99 and 104. Data from stations 4 and 56 were deleted due to incorrect firing of bottles during the cast at station 4 and problems with merging of data during the CTD processing for station 56. Data from stations 92 and 93 were deleted since no CTD data was recorded for these casts and correct depths could not be determined (especially given the variation between depths recorded on CTD sheets and actual CTD sample burst depths found with other stations). The data was archived on 26/11/96 and all files copied to tape on 27/11/96. ------- ----------------------- Table 1. Data Correction Details StationRP* NBN* Comments Action 3 12 3 Malfunctioned thermometer Delete temperature data. data entered. 4 Merging problems Delete entire station data. encountered during CTD processing. 6 8 5 Dubious analytical value Delete DO value. for DO. 8 4 44 Dubious analytical value Delete DO value. for DO. 8 3 117 Salinity difference = Sample taken on a steep 0.011. gradient. Accept value. 9 6 11 Incorrect salinity value Enter correct value entered 9 1 119 Salinity difference = Sample taken on a steep -0.012. gradient. Accept value. 9 Incorrect temperature data Enter correct value entered. 9 Thermometer data only read Delete second readings. once, but entered twice. 9 DO values don't agree with Accept DO values since sensor on CTD. fouling of sensor suspected. 11 4 44 Phosphate data suspect. Delete phosphate value. 11 3 117 Phosphate data suspect. Delete phosphate value. 12 DO values don't agree with Accept DO values since sensor on CTD. fouling of sensor suspected. 13 5 8 Dubious analytical value Delete DO value. for DO. 13 4 44 Salinity difference = Sample taken on a steep 0.011 gradient. Accept value. 13 2 75 Salinity difference = Although sample was taken on 0.020 a slight gradient, the difference is too large. Delete salinity value. 17 12 3 Thermometer #1 malfunction Delete temperature data for #1. 17 8 11 Dubious analytical value Delete DO value. for DO. 17 1 115 Bottle leak suspected. Delete all results for RP1 18 7 14 Salinity sample taken from Move salinity value to RP6 RP6 and correct sal sheets and bottle log. This leaves no salinity sample at RP7. 18 6 88 Salinity sample taken from Delete salinity value RP5 18 2 75 Salinity difference = Although sample was taken on -0.018. a gradient, the difference is too large. Delete salinity value. 23 9 92 Incorrect salinity value Enter correct value entered 23 3 119 Salinity difference = Although sample was taken on 0.035. a gradient, the difference is too large. Delete salinity result. 24 12 3 Malfunction of Delete temperature data. thermometer. 24 8 44 Salinity difference = Sample taken on a steep -0.011. gradient. Accept value. 24 2 75 Salinity difference = No gradient present. Delete -0.021. salinity result. Bad sample or analysis 24 Phosphate data not in .DAT Calculate sample file because of manual concentrations and enter into measurements. .DAT file. 25 10 5 Salinity difference = Sample taken on a steep 0.014. gradient. Accept value. 26 10 5 Salinity difference = Sample taken on a steep 0.013. gradient. Accept value. 27 10 5 Salinity difference = Sample taken on a steep 0.010. gradient. Accept value. 28 12 3 Salinity difference = Sample taken on a steep -0.014. gradient. Accept value. 28 Phosphate data not in .DAT Calculate sample file because of manual concentrations and enter into measurements. .DAT file. 30 8 119 Niskin fired at RP7. Change depth. 30 7 8 Niskin fired at RP6 Change depth to 0.1m (double fire). shallower than RP6. 30 5 115 Nutrient sample taken from Delete nutrient data for RP5 RP4. and adjust bottle log. 30 4 117 Dubious analytical value Delete DO value. for DO. 30 2 75 No salinity sample. Bottle number deleted from bottle log and salinity sheets 30 1 118 No burst data Interpolate depth from other sample depths 33 2 75 Salinity difference = Sample taken on a steep 0.011 gradient. Accept value. 33 Phosphate data not in .DAT Calculate sample file because of manual concentrations and enter into measurements. .DAT file. 35 10 14 No burst data Interpolate depth from other sample depths 35 8 10 No burst data Interpolate depth from other sample depths 35 Phosphate data not in .DAT Calculate sample file because of manual concentrations and enter into measurements. .DAT file. 35 Thermometer data only read Delete second readings. once, but entered twice. 35 Extra lot of sample burst Delete from .CAL file data @ 67.23m 37 1 6 No burst data Interpolate depth from other sample depths 38 10 5 Salinity difference = Sample taken on a steep 0.010 gradient. Accept value. 38 7 10 No burst data Interpolate depth from other sample depths 38 1 6 Niskin fired at RP2 Change depth at RP1 to be (double fire). 0.1m deeper than RP2 38 1 6 Salinity difference = Sample taken on a steep 0.011 gradient. Accept value. 39 Phosphate data not in .DAT Calculate sample file because of manual concentrations and enter into measurements. .DAT file. 42 12 3 Thermometer #1 malfunction Delete temperature data for #1. 42 8 14 DO value looks Accept value as on a steep questionable. gradient. 42 8 14 Salinity difference = Accept value as on a steep 0.013 gradient. 42 Phosphate data not in .DAT Calculate sample file because of manual concentrations and enter into measurements. .DAT file. 43 12 3 Salinity difference = Sample taken on a steep 0.017 gradient. Accept value. 43 3 10 Salinity difference = No gradient present. Delete -0.062 salinity result. Bad sample or analysis 43 Salinity bottle numbers Alter bottle log to reflect incorrect compared to salinity sheets salinity sheets 50 8 6 Salinity difference = Sample taken on a steep 0.020 gradient. Accept value. 50 6 911 Salinity difference = Sample taken on a steep 0.012 gradient. Accept value. 50 Nutrient results look Accept values due to water different. masses. 51 9 15 Salinity difference = No gradient present. Delete -0.018 salinity result. Bad sample or analysis 51 5 14 Dubious analytical value Delete DO value. for DO. 51 3 44 Incorrect salinity value Enter correct value entered 53 Nutrient results look Accept values due to water different. masses. 54 12 3 Salinity difference = Sample taken on a steep -0.019 gradient. Accept value. 54 10 9 No burst data Interpolate depth from other sample depths 54 4 118 Nitrate result dubious. Bad analysis. Delete nitrate value. 54 1 96 No burst data Interpolate depth from other sample depths 56 Merging problems Delete entire station data. encountered during CTD processing. 58 10 14 Salinity difference = Delete salinity value as no 0.012 gradient present. 60 8 96 Phosphate result dubious. Bad analysis. Delete phosphate value. 65 11 11 Salinity difference = Although sample was taken on 0.060 a slight gradient, the difference is too large. Delete salinity value. 65 10 9 Salinity difference = Sample taken on a steep 0.015 gradient. Accept value. 65 1 20 No burst data Interpolate depth from other sample depths 67 12 3 Salinity difference = Sample taken on a steep -0.015 gradient. Accept value. 67 10 9 Salinity difference = Sample taken on a steep -0.013 gradient. Accept value. 67 Nutrient results look Accept values due to water different. masses. 68 12 14 Salinity difference = Sample taken on a steep 0.016 gradient. Accept value. 68 7 96 Salinity difference = Sample taken on a steep 0.011 gradient. Accept value. 69 11 3 Salinity of ~-800 was Delete salinity result. found 69 10 8 Salinity difference = No gradient present. Delete -0.016 salinity result. Bad sample or analysis 69 Nutrient results look Accept values due to water different. masses. 70 12 3 No burst data Interpolate depth from other sample depths 70 3 119 Salinity sample taken from Move salinity value to RP2 RP2 and correct sal sheets and bottle log. This leave no salinity sample for RP3. 70 2 75 Thermometer #1 malfunction Delete temperature data for #1. 70 2 75 Salinity sample taken from Delete salinity value RP1 70 1 911 No burst data Interpolate depth from other sample depths 71 3 119 No burst data Interpolate depth from other sample depths 71 2 75 No burst data Interpolate depth from other sample depths 71 1 911 No burst data Interpolate depth from other sample depths 72 8 44 Salinity difference = Sample taken on a steep -0.016 gradient. Accept value. 72 1 911 No burst data Interpolate depth from other sample depths 74 4 8 Salinity sample taken from Delete salinity result at RP5. RP4. Adjust bottle log. 74 2 75 Salinity difference = Sample taken on a steep 0.014 gradient. Accept value. 78 4 8 Nutrient sample taken from Delete nutrient data from RP2. RP4. 81 2 14 No burst data Interpolate depth from other sample depths 86 1 6 Salinity difference = Sample taken on a steep 0.027 gradient. Accept value. 87 1 6 No burst data No other sample depths to interpolate depth from. Retain pressure recorded on CTD sheets. 88 1 6 Salinity difference = Sample taken on a steep 0.012 gradient. Accept value. 89 1 6 Salinity difference = No gradient present. Suspect -0.020 data. Delete salinity value. 91 12 3 Salinity difference = Sample taken on a steep -0.013 gradient. Accept value. 92 No CTD data Delete station, no way of determining depths 93 No CTD data Delete station, no way of determining depths 94 4 20 Salinity difference = Sample taken on a steep -0.013 gradient. Accept value. 94 3 14 Salinity sample taken from Delete salinity result at RP2. RP3. Adjust bottle log. 94 1 11 No burst data Interpolate depth from other sample depths 95 12 3 Salinity difference = Sample taken on a steep -0.012 gradient. Accept value. 95 7 9 Salinity difference = Sample taken on a steep 0.011 gradient. Accept value. 95 5 6 Salinity difference = Sample taken on a steep 0.016 gradient. Accept value. 95 1 11 No burst data Interpolate depth from other sample depths 96 12 3 Salinity difference = Sample taken on a steep 0.012 gradient. Accept value. 96 10 96 Salinity difference = Sample taken on a steep 0.015 gradient. Accept value. 96 7 9 Salinity difference = Sample taken on a steep 0.032 gradient. Accept value. 96 4 20 Salinity difference = Sample taken on a steep 0.026 gradient. Accept value. 96 3 14 Salinity difference = Sample taken on a steep 0.018 gradient. Accept value. 96 2 8 Salinity difference = Sample taken on a steep 0.018 gradient. Accept value. 96 1 11 Salinity difference = Sample taken on a steep 0.019 gradient. Accept value. 97 6 10 Salinity difference = Sample taken on a steep 0.012 gradient. Accept value. 97 5 118 Salinity difference = Sample taken on a steep 0.010 gradient. Accept value. 97 4 20 Salinity difference = Sample taken on a steep 0.011 gradient. Accept value. 98 1 11 No burst data Interpolate depth from other sample depths 100 1 119 No burst data Interpolate depth from other sample depths 101 10 20 Phosphate value dubious. Delete phosphate value. 102 1 20 No burst data Interpolate depth from other sample depths 103 1 20 Salinity difference = Sample taken on a steep -0.013 gradient. Accept value. 105 11 44 No burst data Interpolate depth from other sample depths 105 DO values don't agree with Accept DO values since sensor on CTD. fouling of sensor suspected. *RP = Rosette Position *NBN = Niskin bottle number [Back to text] ------- -------- [Back to top] ------------------------------------------------------------------------ Created by Rebecca Cowley on 6 May 1998. Informal enquiries and further details may be obtained by contacting: Rebecca.Cowley@marine.csiro.au ------------------------------------------------------------------------ ------------------------------------------------------------------------