The table below provides basic information about the float, including primary sensors, mission parameters and current status of profiles.
Institute | CSIRO |
Principal Investigator | Susan Wijffels |
Pressure Sensor | Druck (serial number=10450) |
CTD Sensor | APEX-SBE-41 (serial number=2924) |
CTD Sampling Mode | Burst Sampler |
Controller Board | APF 8 |
Additional Sensors/Software | None |
Park Depth | 1000 m |
Profile Depth | 2000 m |
Launch Date | 07-05-2007 |
Number of D-moded Profiles | 100 |
Calibration Date | 02-08-2010 |
Pressure Drift | Surface Pressure Offset corrected |
Salinity Drift | TBTO but otherwise no salinity drift detected |
This float was deployed in the G.A.B., Southern Ocean, to the south of Esperance, W.A., in a region bounded by 108 to 122 ºE and 33 to 38 ºS.
The surface pressure for this float is shown in the plot below.
Potential Temperature-Salinity (a), Location (b, Max Temperature (c) and Sea Surface Salinity (d) plots located below.
Surface temperatures generally varied between 13 and 21.5 ºC and surface salinities from 35.3 to 36.0.
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.
The profiles are generally well distributed, with the exception of the first few profiles which show signs of TBTO fouling.
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).
The potential-temperature/salinity relation for the deepest theta levels for this float (in black) and nearby argo floats (coloured) is displayed below.
With the exception of the TBTO affected profiles, the profiles for this float look fine.
There were inversions in profiles; 4(at 60m depth),5,8(surface),39(surface),43(surface),110,113,117. None of these were significant and they were not flagged.
Salthooks occurred in profiles; 2,4,10,12,14,16,18,20,39,40,41,42,43,46,47,48,49,50,51,52,53,54,55,56,57,58,60,68,69,74,76,78,80,83,86,88,90,91,93,95,98,100.
The float grounded on profiles; 21 to 38. A spike in profile 39 at 80 m was flagged as QC=4. All of profiles 27, 28, 29, 30, 31-36 were QC'd as bad (i.e QC=4) where the float grounded. The bottom of profiles 25, 26 and 44 were also QC'd as 4.
The plot below shows the analysis of salinity drift using the WJO/OW software.
This float requires no correction.
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.
The first couple of profiles are affected by TBTO. Float very close to climatology.
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.
Float very close to nearby argo.
This float required no salinity drift correction apart from a TBTO correction applied to the first two profiles.
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.
Created 03-08-2010