Your Objective

Use pH data from the surface down to 200m from the North Pacific Ocean to look if there are patterns over a year.

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Data Tips

When the site loads, you are able to see pH data from all of January 2016 from the Oregon Offshore Profile Mooring in the Coastal Endurance Array. You can interact with the data by:

As a note, the color denotes the time of year the pH data are from (light purple/pink are from January through blue/dark purple from December).

Questions for Thought

Orientation Questions
  • Across what time periods are you able to observe pH data in this graph?
  • What is the first month and year there are data?
  • What is the last month and year there are data?
  • What is the overall range of pH data you are able to observe in this graph?
Interpretation Questions
  • What changes or patterns did you observe in pH with depth over this time period in the Northern Pacific Ocean?
  • When did you see these changes or patterns?
  • What questions do you still have about changes in pH from the surface to down in the water column over time?

Background Information

Click on the images below to learn more about where and how the dataset above was collected.

Dataset Information

The data for this activity was obtained from the following profiling pH instrument:

Download this Dataset

The above datasets were downloaded from the OOI data portal. Complete profiles of the instrument were identified and the profile closest to midnight (GMT) each day was saved. This reduced the overall temporal resolution (and size) of the final dataset but it preserved the raw variability exhibited in individual profiles and measurements.

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