Exploring Data Through Interactive Visualizations
Below is an interactive data visualization of the evapotranspiration (ET) of a beaver-dammed landscape in the Domeland Wilderness of Sequoia National Forest, CA.
About the data:
The visualization includes a satellite image of the dammed area, and three data layers:
- pre-drought daily ET (May): yellow (0 mm/day) -> blue (8 mm/day) color scale
- during drought daily ET (late July): yellow (0 mm/day) -> blue (8 mm/day) color scale
- difference in daily ET between the two: red (-4 mm/day, lower ET during drought) -> blue (+4 mm/day, higher ET during drought) color scale
Two pieces of additional information are also associated with the raster data cells:
- presence of beaver: yes or no
- topographic zone: hillslope or riparian
To interact with the data:
- click the layer name in the legend to turn layers on an off
- hover your mouse over cells (on computers) or tap cells (on mobile devices) to view numeric data for a given cell and beaver presence + topographic zone. *note only the top-most active layer will display its value in the hover box
- use the toolbar on the right to pan, zoom, and save png images
Explore the data visualization to answer the following questions:
- What kinds of cells have the highest ET? What characteristics do they have in common?
- How does beaver damming impact ET? Do places influenced by beaver have higher or lower ET than areas without beaver? Does that relationship stay the same or change during drought?
- Does beaver damming benefit or harm ecosystem ET in arid landscapes? How do you know?
- What additional data would you need to be sure that the ET signal you see is coming from plants and not open water?
The Tale of Sir Dayta Simmilatio: An Educational Choose-Your Own Adventure Story
This choose-your-own adventure story, The Tale of Sir Dayta Simmilatio, is designed to introduce the concept of Ensemble Kalman Filter (EnKF) data assimilation in a fun, non-technical manner. It was written by me (Emily Fairfax), and illustrated by my brother, Shepard Fairfax. It can be printed out or run as a powerpoint.
Our hero, Sir Dayta Simmilatio, embarks on a journey to protect the town of Cobble from the wicked snow beast Swee. He is given advice and help by several others along the way – but who can he trust?
If you would like a version with higher resolution images for projecting on a large screen, just send me a note on my “contact me” page.