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.
Seasonal global tropical SST anomalies for September to November 2006 expressed in degrees Celsius with respect to the 1982–2006 base mean period. Positive anomalies in the equatorial eastern-central Pacific Ocean are a manifestation of the 2006–2007 warm ENSO event.