Green roof temperature

This summer, Paul Ellis, of Montgomery Blair HS will be measuring the temperature above the experimental roofs at UMD in order to determine how different roof treatments might affect the air entering hvac systems and thus the energy demands of these systems...
Here he is installing several temperature sensors at different heights above a platform planted in S. kamtschaticum:

More UMD research

Here's a view of an experiment comparing solar panel function with and without green roof supplementation... ala Scott Tjaden et al.