Skip to main content
U.S. flag

An official website of the United States government

Treeline Response to Climate: Up, Down, All Around

Treeline response to climate in the western U.S.: the big picture and the current picture, as well as 21st century projections.


Connie Millar
USDA Forest Service Pacific Southwest Research Station


Producer - Michael Furniss
Technical production - Jeffrey Guntle


A look at climate trends in the western U.S., including droughts, melting snowpack, glaciers, wildfire, forest densification and expansion, forest mortality, uphill migration, and changes in genetic diversity and adaptation.

Video Length


Publication Date

You should gain an understanding of:

The big picture of current climate changes in the western U.S. and 21st century projections.

Potential vegetation responses to climate changes.