An official website of the United States government
Here’s how you know
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.
This site is currently in beta, and your feedback is helping shape its ongoing development.
This data archive contains gridded and regionally averaged records of North American climate and soil moisture as well as the 1,498 tree-ring width index (RWI) chronologies used for gridded...