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 grey rectangle, enlarged in the succeeding image, delimitates the area for which NAO index, SST and Chl a have been provided.
