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.
SeaWiFS-derived chlorophyll concentration for February, 1998 (A) and overlaid with SST and SSH data for 1997–1998 (B) [NASA Goddard Space Flight Center; (http://daac.gsfc.nasa.gov); ref 11]. Chlorophyll a concentration drops to zero because of missing data in May and June, 1998.
