Department of Civil and Environmental Engineering
University of Washington
T° Toolbox

Literature/References

Evergreen trees as radiation shields

Near-surface ground temperature

Guidelines for Sensor Deployment in TALL trees

Study Sites

EOFs

Mapping Cold-Air Pools


This site is designed for people studying processes related to temperature in complex terrain. Extensive site-specific studies have been carried out across the globe. Here we strive to collect that information in one place and provide a set of tools that can easily be downloaded and used by anyone.

Step-by-Step Guide to the pulley system:

1) Cut a slit in a tennis ball and fill it with beans and small rocks. Insert a screw approximately the length of the tennis ball's diameter into the tennis ball.

2) Buy a spool of nylon cord (several hundred feet -- twice the height desired in the tree times the number of trees).

3) Flake the nylon cord into a bag. This should be done by dropping the cord loosely into the bag one straight section at a time. This will prevent the cord from tangling during deployment.

4) Use a slip knot to tie the end of the nylon cord to the screw in the tennis ball.

5) Toss the tennis ball over a tree branch or use a launching device (we like the "Hyperdog Tennis Ball launcher") to get the tennis ball higher.

6) Remove the tennis ball from the nylon cord, attach the temperature sensor (we recommend using a key ring at the attachment point for ease in sensor replacement), cut the cord, and tie together the ends to create a loop of nylon cord.

7) Use this as a pulley to raise the temperature sensor high in the tree.

8) Secure the bottom of the nylon cord to a wood screw in the tree's trunk or to a low-lying branch.