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=2465225) |
CTD Sensor | APEX-SBE-41 (serial number=3590) |
CTD Sampling Mode | Burst Sampler |
Controller Board | APF 8 |
Additional Sensors/Software | None |
Park Depth | 1000 m |
Profile Depth | 2000 m |
Launch Date | 29-07-2008 |
Number of D-moded Profiles | 54 |
Calibration Date | 22-07-2010 |
Pressure Drift | Surface Pressure Offset corrected for profiles 1 and 2, surface Pressure Offset unknown and uncorrectible for profile 3 onwards, TNDP float, pressure error increased to 10 db |
Salinity Drift | No salinity drift detected |
This float was located in the Indian Ocean, east of Madagascar, in an area bounded by 59 to 67 ºE and 24 to 29 º S.
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.
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 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.
There were inversions in profiles 65,66,67,68,70,72 when the float grounded.
Salt hooks were located in profiles; 1,2,3,4,5,6,8,12,14,16,17,20,23,25,27,29,31,34,36,37,39,42,44,46,48,50,54. These were flagged as QC 4 for both T & S.
Multiple bad data and missing data from profile 61 when the float grounded.
The plot below shows the analysis of salinity drift using the OW software.
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.
This float is very close to climatology at the start of the record but is potentially salty offset by 0.01 at the end of life.
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.
This float is comparable to nearby Argo data, not many floats to compare it to.
At this stage, the float requires no salinity drift correction as it is within the 0.01 error bounds.
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 15-07-2013