Our Earth's Fever Thermometer - First Day Cover, USA

First day cover from the USA for the "Global: Ocean Surface Temperature" stamp issue. The stamp was canceled with the colored first day cancellation in Washington, DC April 22, 2014.
The fever thermometer of our earth. The US Post has come up with a special motif - a computer animation showing the surface temperature of our oceans and their currents - a visual processing by the US Institute for Oceanic and Atmospheric Climate Research - a successful edition.