Your Objective

Use pH with depth data to determine if there are relationships over time across different regions of the ocean.

Zoom to:

Data Tips

When the site loads, you are able to see pH data data from all of January 2016 from the Coastal Endurance (Oregon Offshore) and Cabled (Oregon Shallow Slope) Arrays both off of Oregon. 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 these graphs?
  • What is the first month and year there are data for each graph?
  • What is the last month and year there are data for each graph?
  • What is the overall range of pH data you are able to observe in these graph?
Interpretation Questions
  • What similarities and differences did you find in patterns of pH with depth over time between Coastal Offshore and Shallow Slope locations in temperate North Pacific Ocean locations?
  • What other questions do you have about variations in patterns of pH with depth over time and space from these data?

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 instruments:

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.

Finished the activity? Please take our quick Student Survey