Figure 1. Mean stratospheric contribution to US surface ozone during April–May.
The 23-year climatology of O3Strat from the model surface level is shown. Black filled circles denote locations of 22 surface ozone monitoring sites.
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.