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=2385261) |
CTD Sensor | APEX-SBE-41 (serial number=3305) |
CTD Sampling Mode | Burst Sampler |
Controller Board | APF 9 |
Additional Sensors/Software | None |
Park Depth | 1000 m |
Profile Depth | 2000 m |
Launch Date | 17-11-2007 |
Number of D-moded Profiles | 81 |
Calibration Date | 29-07-2010 |
Pressure Drift | Surface Pressure Offset corrected |
Salinity Drift | No salinity drift detected |
This float was located in the central Indian Ocean in an area bounded by 92 to 101 ºE and 18 to 22 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.
Surface temperatures generally varied between 22.5 and 26.5 ºC and surface salinities from 34.6 to 35.3.
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 a wide spread in the profiles at depth and multiple fresher intrusions 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.
The profiles for this float are right in the middle of the envelope of profiles of neighbouring floats.
There were inversions in profiles; 36,60,67,69. These were not significant and were not flagged.
Salt hooks were located in profiles; 3,5,6,8,10,19. The two last values of profile 5 were flagged as QC 4 for both T & S.
Profiles 38, 39, 40 and 41 were prematurely shortened, not sure why but there appears to be no bad data.
The plot below shows the analysis of salinity drift using the WJO/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 theta surface of 2.5 degrees C.
This float is very close to climatologies.
The plots below show the raw float salinity data (solid blue line) compared to neighbouring argo floats (coloured symbols) on a potential temperature surface of 2.6 degrees C. The locality map shows the location of the profiles for this float and for neighbouring floats.
There is lots of variation in salinity on theta levels in this region. It looks as if the float has crossed over a front multiple times but is 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 29-07-2010