Fig. 6.
Average absolute changes for simulated hourly O3 (ppb) between a) March 15 – April 15, b) April 15 – May 15, c) May 15 – June 15, d) June 15 – July 15, e) July 15 – August 15, and f) August 15 – September 15.
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.