20 Years of Changing Seasons: 'It's like watching the Earth breathe'

NASA captured two decades of the earth's seasonal changes and used the data to create a remarkable time lapse video. (Video credit: AP/YouTube)

NASA captured two decades of the earth's changing seasons and condensed it into about a 2-minute time lapse video that is dazzling people across the globe.

"It's like watching the Earth breathe. It's really remarkable," said NASA oceanographer Jeremy Werdell, who took part in the project.

The project used data from September 1997 to September of this year, which Werdell said will be useful resources for policymakers and many others.

On the sea side, Werdell was struck by "this hugely productive bloom of biology" that exploded in the Pacific along the equator from 1997 to 1998 — when a water-warming El Nino merged into cooling La Nina. This algae bloom is evident by a line of bright green. In considerably smaller Lake Erie, more and more contaminating algae blooms are apparent — appearing red and yellow.

Werdell said the visualization shows spring coming earlier and autumn lasting longer in the Northern Hemisphere. Also noticeable to him is the Arctic ice caps receding over time — and, though less obvious, the Antarctic, too.

Click the video above to watch Earth's seasons come to life.