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North America Phenology Campaign

North American Phenology Campaign

The North American Phenology Campaign focuses on monitoring and reporting plant phenology data and contributes to GLOBE's long-term environmental record. In this campaign, students will observe and report plant green-down and green-up, have opportunities to meet scientists, and share the results of their investigations. Register at any time for the Phenology Campaign through the link below!
Fall Dates: September to December      Spring Dates: February to June

Share your Green-Up research!

Share the results of your Green-up measurements through this Share Out Form! There are three ways to share:
  1. Help us visualize how different parts of North America experience the vernal window (see section below)
  2. Create a video of your experience and research*
  3. Share a Green-up story
*One video will be chosen from the submitted videos to represent North America in the Europe and Eurasia "Our Spring with Trees" phenology wrap-up event on Monday, June 2. The chosen school or organization does not need to be present on June 2.

Video tips:
  • Please do not use copyrighted images, video or music.
  • If using a phone for filming, hold it in landscape mode.
  • Count to three before and after you start talking to create buffer time.
  • Introduce yourself, your school, and location at the beginning of the video.
  • What is the key message that you want your peers to take away?

What to expect

  • Webinars for learners and educators
  • Resources that support the content
  • Information about phenology-related opportunities
  • Sharing opportunities
  • Certificates for active schools/organizations

Get started

New to GLOBE? Complete GLOBE eTraining

Complete the eTrainings for:

Find the Protocols

Measure leaf color change in the fall and budburst in the spring by following the steps
in the Green-Down and Green-Up Protocols.

Check out our Tutorials page for help with collecting GLOBE phenology measurements.

*The GLOBE European Phenology Campaign has done a great job of sharing activity reports from their participants. See example videos, slideshows, and other reports from students in the European Phenology Campaign Padlet.

New This spriNG! Calculate your vernal window 

The vernal window is 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.
. 
  • Use these simple instructions (PDF) to calculate your vernal window length.
  • Share your vernal window length on this form to help us visualize how different parts of North America experience the vernal window.
  • Learn more about why scientists are studying the vernal window from our latest webinar! 

Earn a virtual badge!

The 30 Years of GLOBE Campaign encourages participants to consider the environmental changes emerging in their local ecosystems through collecting and analyzing GLOBE data and exploring GLOBE learning activities.

By participating in the 2025 North American Phenology Campaign you can earn a "30 Years of GLOBE Badge." Fill out the 30 Years of GLOBE Campaign Participation Form to receive your badge!

Questions?

If you have any questions as you set up your site, select your trees, start to enter data, or anything else, please email us at usglobeoffice@gmail.com.