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=7726) |
CTD Sensor | APEX-SBE-41 (serial number=2166) |
CTD Sampling Mode | Burst Sampler |
Controller Board | APF 8 |
Additional Sensors/Software | None |
Park Depth | 1000 m |
Profile Depth | 2000 m |
Launch Date | 09-03-2007 |
Number of D-moded Profiles | 106 |
Calibration Date | 13-08-2010 |
Pressure Drift | Surface Pressure Offset corrected |
Salinity Drift | No salinity drift detected |
This float was deployed in the Indian Ocean, in between Indonesia and W.A., in a region bounded by 113 to 118 ºE and 16.5 to 19.5 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 24 and 31 ºC and surface salinities from 34.2 to 35.1.
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 reasonably distributed throughout the water column with most variability occurring in the upper water column. The deep profiles for this float are tightly distributed with the exception of profile 1 which suffers from 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.
There are very few neighbouring floats to compare this one to, but with the exception of the TBTO profiles this float compares well with the other two floats.
There were inversions in profiles; 5 (surface, not significant), 10 (surface, not significant), 12 (surface, not significant), 51 (surface, not significant), 82 (ns), 116 (ns).
Salt hooks were located in profiles; 3,5,8,10,12,14,18,19,20,22,24,26,31,39,40,41,42,43,44,45,46,52,53,54,55,56,57,59,61,62,64. These were flagged as QC 4 for both T & S.
The float grounded on multiple profiles. Bad bottom values were flagged in profiles 9, 27-38 and 47-51.
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 float suffers from TBTO for the first profile. The float is close to climatologies for the first 60 profiles or so after which it is salt offset by about 0.008 from both climatologies.
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.
There is about a 0.06 spread in the data. Difficult to determine if this float is drifting salty at end of the record but leave as is for now.
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 13-08-2010