Troubleshooting

Q&A: Identifying Data Types

Posted on 04.28.2021

unlabled data from a HydroCAT-EP multiparameter probe

The data above came from a HydroCAT-EP multiparameter CTD in a shallow embayment from April - November. Can you correctly label the 4 plots shown above? The HydroCAT-EP measures the following parameters:

  • Temperature
  • Conductivity
  • Pressure
  • Dissolved oxygen
  • pH
  • Chlorophyll
  • Turbidity

Hint: this area is subject to periods of eutrophication during the late summer/early fall.

Time series of temperature, chlorophyll, dissolved oxygen, and pH in a shallow embayment

From top to bottom, the plots contain:

  • Temperature (°C)
  • Chlorophyll (µg/L)
  • Dissolved Oxygen (mg/L)
  • pH

Chlorophyll and dissolved oxygen are monitored closely at this site, as nitrate loading from a nearby harbor contributes to low dissolved oxygen conditions. Multiparameter instruments like the HydroCAT-EP help to catch these events and tie each parameter into a broader context.

Q&A: Measurements Along the Tidal Cycle
Troubleshooting
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Q&A: Measurements Along the Tidal Cycle
Zooming in shows salinity and dissolved oxygen are fluctuating heavily alongside the tidal cycle. Can you determine what is causing this?
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Q&A: Identifying Data Types
Troubleshooting
04.28.21
Q&A: Identifying Data Types
Can you correctly label the 4 plots shown above? Hint: this area is subject to periods of eutrophication during the late summer/early fall.
Learn More
Q&A: Negative Oxygen Values
Troubleshooting
02.23.21
Q&A: Negative Oxygen Values
Dissolved oxygen should not be negative. Can you determine the error that created the unusual oxygen profile above?
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