Float WMO_ID: 5901151

Float WMO_ID: 5901151




Table of Contents

  1. Float Information
  2. Float Location
  3. Surface Pressure
  4. Potential Temperature-Salinity Plot
  5. Temperature-Salinity Comparison with Nearby Floats
  6. Inversions
  7. Salt Hooks
  8. Parameter Sections and Initial QC Notes
  9. WJO/OW Results
  10. Anomaly Plot
  11. Comparison with Nearby Argo
  12. Salinity Drift Assessment
  13. Float Summary



Section 1: Float Information

The table below provides basic information about the float, including primary sensors, mission parameters and current status of profiles.


Institute CSIRO
Principal InvestigatorSusan Wijffels
Pressure SensorDruck (serial number=7849)
CTD SensorAPEX-SBE-41 (serial number=2236)
CTD Sampling ModeBurst Sampler
Controller BoardAPF 8
Additional Sensors/SoftwareThis float has ice detection software
Park Depth1000 m
Profile Depth2000 m
Launch Date08-01-2006
Number of D-moded Profiles185
Calibration Date09-08-2011
Pressure DriftSurface Pressure Offset unknown and uncorrectable from profile 1 onwards, TNDP float, QC=2, serial number < 2324175
Salinity DriftNo salinity drift detected

























Section 2: Float Location

Float trajectory and location plot

This float was located in the Southern Ocean in an area bounded by 80 to 155 ºE and 52 to 62 º S.


Section 3: Reported Surface Pressure

The surface pressure for this float is shown in the plot below.


Surface Pressure plot


Section 4: Potential Temperature-Salinity Plot

Potential Temperature-Salinity (a), Location (b, Max Temperature (c) and Sea Surface Salinity (d) plots located below.

Potential Temperature-Salinity, Location and Max Temperature and Sea Surface Salinity plots

The plot below shows the potential-temperature/salinity relationship for the deepest theta levels where the relationship between the two parameters should show the least variation.

Potential Temperature-Salinity deepest theta levels plot

Section 5: Temperature-Salinity Comparison with Nearby Floats

The two plots below show a). the location of this float (black circles) in relation to the position of other nearby argo floats (coloured circles) and b). The potential-temperature/salinity curve for this float (in black) compared to nearby argo floats (coloured).

Potential Temperature-Salinity nearby comparison plot

The potential-temperature/salinity relation for the deepest theta levels for this float (in black) and nearby argo floats (coloured) is displayed below.


Potential Temperature-Salinity nearby deep comparison plot

Section 6: Inversions

There were non significant inversions in profiles; 7,38,76,115,145,150,151,152,153,178,183 which were not flagged. The inversion in pf 64 at 35 m was flagged as QC=4 for both T & S.


Section 7: Salt Hooks

Salt hooks were located in profiles; 1,2,3,5,7,9,11,13,14,17,18,22,25,26,29,32,34,36,38,40,42,44,46,48,50,52,54,58,60,62,64,68,70,72,74,76,78,79,84,85,87,89,93,95,97,99,101,103,105,107,109,111,113,115,117,119,121,123,125,127,129,131,135,136,138,141,142,144,148,150,152,154,156,158,160,162,164,166,168,170,172,174,178,180,183,185. These were flagged as QC 4 for both T & S.


Section 8: Parameter Sections and Initial QC Notes

There were no missing profiles.


Float trajectory overlayed on bathymetry
Float trajectory and bathymetry plot




















Potential temperature section with time, (left) surface to 2000m and (right) surface to 500m

Potential Temperature Plot - Full Depth Range Potential Temperature Plot - Surface to 500m

Salinity section with time, (left) surface to 2000m and (right) surface to 500m

Salinity Plot - Full Depth Range Salinity Plot - Surface to 500m

Potential density section with time, (left) surface to 2000m and (right) surface to 500m

Potential Density Plot - Full Depth Range Potential Density Plot - Surface to 500m

Section 9: WJO/OW Results

The plot below shows the analysis of salinity drift using the WJO/OW software.


WJO/OW plot

This float requires no correction.


Section 10: Anomaly Plots

The four plots below show the salinity anomalies on theta surfaces compared to (a) the Gouretski and Kolterman climatology, (b) the CARS (CSIRO Atlas of Regional Seas)/WOA (World Ocean Atlas) climatology, (c) the anomalies within the float series itself, (i.e. the salinity anomaly of each profile from the mean profile average for the float and (d) the raw float salinity compared to the CARS and G&K climatological salinity on a deep theta surface.


Anomaly Plot

This float is fine compared to climatologies.


Section 11: Comparison with Nearby Argo

The plots below show the raw float salinity data (solid blue line) compared to neighbouring argo floats (coloured symbols) on a deep potential temperature surface. The locality map shows the location of the profiles for this float and for neighbouring floats.


Nearby Argo Comparison Plot Nearby Argo Location Plot

This float is in the middle to upper spectrum of the neighbouring float envelope. Looks fine for now.


Section 12: Salinity Drift Assessment

This float required no salinity drift correction.



Section 13: Float Summary

The plot below summarises the QC flags and salinity differences for the raw and adjusted salinity fields in the final delayed mode files submitted to the GDAC.

Final Check Plot