Data Warts and Causes

1
Data Warts and Causes

• Pressure
• Temperature
• Salinity

2
Data Warts Causes Temperature

• Thermal mass errors.
• As the float ascends through temperature
  gradients, the cell corrupts the water
  temperature. The temperature corruption induces
  a conductivity error.

3
Data Warts Causes Temperature

• Salinity drifts caused by long-term temperature
  drifts?

4
Warts Causes Pressure

• Druck Snowflakes
• Internal shorts caused by conductive particles
  suspended in oil.
• Pressure samples are erratic or off-scale.

5
Warts Causes Pressure

• Druck Microleaks

6
Warts Causes Pressure

• APEXs with Apf8 controllers dont report negative
  surface pressure.

7
Warts Causes Salinity

• Salinity drifts high of correct.

8
Warts Causes Salinity

• Salinity drifts high toward correct.
• TBT contamination flushes out of the cell as the
  profile is collected.

9
Warts Causes Salinity

• Salinity jumps low of correct.

10
Warts Causes Salinity

• Salinity hooks.
• STP sample collected at the apogee of descent
  forms a high-of-correct hook with respect to
  shallower samples.

11
Warts Causes Salinity

• Salinity hooks.
• Ascent/descent asymmetry in Bernoulli flushing.
• Higher salinity water in cell carried from
  surface (or park level) to deep profile level.
• Incomplete flushing results in salinity that is
  high-of-correct by 0.005PSU.