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=6922) |
CTD Sensor | APEX-SBE-41 (serial number=1988) |
CTD Sampling Mode | Burst Sampler |
Controller Board | APF 8 |
Additional Sensors/Software | Ice detection software and an Oxygen Optode 3830 (serial number=504) |
Park Depth | 1000 m |
Profile Depth | 2000 m |
Launch Date | 12-01-2005 |
Number of D-moded Profiles | 59 |
Calibration Date | 07-12-2010 |
Pressure Drift | Surface Pressure Offset corrected |
Salinity Drift | No salinity drift detected |
This float was located in the Southern Ocean, close to the Antarctic coast, in an area bounded by 115 to 1601 ºE and 60 to 65 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; 8,35,36,40,41. None of these were significant and therefore were not flagged.
Salt hooks were located in profiles; 3,5,7,8,12,14,16,18,34,38,40,42,46,48,49. These were flagged as QC 4 for both T & S.
This is an ice float. There are numerous missing profiles. Several profiles have missing data or are shortened. A few near bottom values were flagged as QC4.
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 close to climatology for most of the series then shows a step fresh offset that may be real. Comparison with more extensive background climatological data shows that this float is within the general spread of data so no salinity correction applied for now.
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.
The float appears to be close to neighbouring floats from pf 1 to 47 after which there is a 0.01 fresh offset, however there are at least 6 other floats that show similarly fresh data at this point so this may be real.
This float required no salinity drift correction - review next time round.
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 07-12-2010