This animation is a beauty shot of cloud model output over North America. The clouds are derived from the Goddard Earth Observing System Model, Version 5 (GEOS-5). GEOS-5 is a system of models integrated using the Earth System Modeling Framework and used to help refine atmospheric weather models.
The lighting of this scene is completely artistic and not scientifically accurate. If accurate lighting were used the diurnal effect would pulse across the globe approximately every 90 frames (3 seconds when played at 30 fps). The slow strobing would have been undesireable for the intended purpose of this animation, which is to highlight the cloud model output.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 184.108.40.206.0