An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
 Image Number K9961-1 |
Rick Edwards (left), University of Arizona graduate student, and David Goodrich download data from a meteorology/flux system, which measures the amount of water and carbon exchanged among vegetation, soil, and atmosphere.
Photo by Peggy Greb.
