WMO ID: 5900648 ( FirstDate: 21Sep2004 LastDate: 05Sep2007 ) WJO average calib. result at θ=2.2°C
deltaS/sigma=2.2 Drift_Obs_Sal=0.010 deltaS=0.008 calS_err=0.004

Legend of symbols used in Figure 1&2
Triangles represent the locations of the "nearby" shipboard CTDs(conducted within 10 days of float measurements), and squares and stars show DM and RT data of "nearby" float measurements (from GDAC). Colors mean the distance of the nearby measurements from the float observations. Red: within 50 km, yellow: within the ellipse of meridionally 125km and zonally 250km radii, and blue: within the ellipse of meridionally 250km and zonally 500km radii. 
Figure2
Locations of float measurements (diamonds). Their colors represent the number of measurement cycle (see the right legend), and the latest position is shown by the solid circle. Dots mean historical data used for WJO salinity calibration and the coast line and seadepth of 1000m, 2000m and 4000m are also shown by solid and yellow lines. 
Figure 1 (below)
Results of salinity calibrations by WJO, BS, and OW methods on 5 cold isothermal surfaces. Blue stars mean float salinities interpolated on the surfaces. The calibrated salinities (with calibration errors) by WJO, BS, and OW are shown by the belts of green (thick white is the optimal value), cyan (black), and yellow (brawn), respectively. Vertical bars by red, pink, and orange represent the local climatological references and their errors estimated by WJO, BS and OW, respectively. The large red and orange circles show the shipboard CTDs obtained at deployments, recoveries, etc. of the float, and red/orange means CTD data with/without watersampling for calibrations.

Figure11 
Figure3
Time series of adjusting factors (and their errors) for float conductivity estimated by the WJO (green), BS (cyan) and OW (brawn) method, respectively. Vertical solid lines mean the discontinuity sections of the adjusting factor estimated by WJO.

Figure12 
Figure4
Anomalies of float salinity from the median of float salinities on isotherms (float  median).

Figure13 
Figure5
Anomalies of float salinity from the historical references of WJO on isotherms (float  ref.).

Figure14 
Figure6
Time series of the minimum error of salinity reference estimated by the WJO (green), BS (cyan) and OW (brawn) method, respectively.

Figure15

Figure7
Statistic indexes of salinity calibration results by WJO on the specified isotherm. Upper panel: Red: Difference between the float salinity and the climatological reference for each cycle. Green: Difference between the uncalibrated and the calibrated salinities. Blue: Change of float salinity from the first measurement for each cycle. Lower panel: The ratio of the absolute salinity difference between the WJO calibrated and the uncalibrated data and the calibration salinity error for each cycle (triangle) and its average until the cycle (circle).

Figure8
Raw float measurements with local climatologies (by WJO: circles with horizontal bars). Color means cycle number (see right legend). 
Figure9
Calibrated float measurements with local climatologies (by WJO: circles with horizontal bars). Color means cycle number (see right legend).

Figure10
TS diagram of the calibrated float data (black) with the nearby CTDs and floats in colder region. Red horizontal bars represent the local climatologies and their errors (on the preset isotherms) estimated by WJO. Red, yellow and cyan dots represent the nearby float data and their color means horizontal distance from the float measurements (same as Figure 1). CTD data are shown by blue triangles, which are interpolated on the preset isotherms of WJO.

Figure11
TS diagram of the calibrated float data (black) with the nearby CTDs and floats. Red horizontal bars represent the local climatologies and their errors (on the preset isotherms) estimated by WJO. Red, yellow and cyan dots represent the nearby float data and their color means horizontal distance from the float measurements (same as Figure 1). CTD data are shown by blue triangles, which are interpolated on the preset isotherms of WJO.
