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.
The dashed black lines indicate lag-large standard error bars for correlation (i.e., 95% confidence bounds). Only lag distances with at least 1,000 paired landscapes are shown.
