Eastern Geographic Science Center



Dr. John W. Jones
Research Geographer

Dr. Jones and team member repair and test one of the weather stations.
Team members must visit weather stations
regularly for maintance and data download.

What types of instruments do you use near the ground?

The weather sensors we place under the forest cover can measure air temperature, soil temperature at two depths, relative humidity, wind speed, incoming and outgoing solar radiation as well as precipitation. Air temperature, soil temperature and relative humidity are measured at all sites. For two of our sites, all types of measurements are made, transmitted, and displayed in real-time.

When visiting the sites, we take “fish-eye” photographs that we analyze and compare with satellite measurements.

At select locations above the forest canopy, we install video cameras (called “Phenocams”) that record changes in phenology for a subset of the forest on a daily basis. These images are also displayed in real-time via the internet and compared against the measurements we make using satellite imagery.

View the animation showing ground-up view of the leaf color change in the spring and in the fall of 2012, in Reston, Virginia.


     fisheye photo bullet   What is phenology?

     fisheye photo bullet   What types of instruments do you use near the ground?

    fisheye photo bullet   What measurements are made by satellite?

    fisheye photo bullet   Phenology Home
Photo taken of canopy from the ground.
A view from underneath the
tree canopy. Top to bottom:
March 7, April 25, and October
19, 2012.

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