North America Phenology Campaign - North America
North American Phenology Campaign
HOw to partIcipate
New to GLOBE? Learn about the Green-Down and Green-Up protocols
One option is to complete the eTrainings for specific Tree and Shrub Green-Down (fall) and Green-Up protocols, listed on the Biosphere eTraining page.
Gather your materials
- Find data sheets on the Green-Up / Green-Down protocol page.
- Green-Down: Find and print a GLOBE Plant Color Guide or use the built in guide in the GLOBE Observer app.
- Green-Up: Use a ruler to measure your growing leaves in millimeters.
Collect your data
Measure leaf color change or growth twice a week by following the four quick steps on the Tutorials page or read the Green-Down or Green-Up Protocol for details.
Enter your data
Use the GLOBE Observer app or paper data sheets and Desktop Data Entry to share your data to the public database.
Educator Resources
Green-Down sequence
Navigate the phenology campaign using a sequence of six short activities to guide you through the fall. The guides include age-appropriate activities and data sheets.
- K-8 Educators GLOBE Green-Down Sequence (for grades K-8, ages 5 -13)
- 9-12 Educators GLOBE Green-Down Sequence (for grades 9-12, ages 14 -18)
Learn about the vernal window
The vernal window occurs during the transition from winter to spring. It can be calculated as the number of days between when snowpack disappears and when the forest canopy closes. The length of the vernal window is different at different latitudes and elevations.
- Watch a webinar and find resources from Dr. Elizabeth Burakowski, Research Assistant Professor at the University of New Hampshire
- Calculate the vernal window in three easy steps (pdf)