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=10496) |
CTD Sensor | APEX-SBE-41 (serial number=2934) |
CTD Sampling Mode | Burst Sampler |
Controller Board | APF 8 |
Additional Sensors/Software | None |
Park Depth | 1000 m |
Profile Depth | 2000 m |
Launch Date | 29-11-2006 |
Number of D-moded Profiles | 118 |
Calibration Date | 16-08-2010 |
Pressure Drift | Surface Pressure Offset corrected |
Salinity Drift | No salinity drift detected |
This float was deployed in the Southern Ocean to the south of Tasmania, in a region bounded by 138 to 153 ºE and 43 to 51 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 8 and 18 ºC and surface salinities from 34.3 to 34.7.
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.
There is large variability at depth in these profiles but this looks reasonable.
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 is extremely high variability in the deep salinity structure between neighbouring floats (about 0.06 psu). The range in salinity for this float is about 0.02 psu. Even though the profiles cover such a huge spread this is reasonable given the distance covered. Compared to neighbouring profiles, these look reasonable.
There were inversions in profiles; 75,98,109. These were not significant and were not flagged.
Salt hooks were located in profiles; 2,3,5,7,9,10,12,14,16,18,23,25,28,30,32,33,36,38,40,43,44,46,49,51,53,57,60,61,64,66,67,69,71,73,75,77,79,81,83,85,87,88,90,92,95,97,98,101,103,105,107,109,111,113,116. These were flagged as QC 4 for both T & S.
The float may have grounded on profile 31 and the bottom value was flagged as QC=4 for both T & S. A spike was flagged in the mixed layer of profile 41 as QC=4 for both T & S.
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.
This float is very close to CARS new 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.
This float is in the middle of the argo envelope and looks fine.
This float required no salinity drift correction.
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 16-08-2010