Credit: NASA/SCIENCE PHOTO LIBRARY

Caption: 3-year moving averages for 1979-1981 to 2004-2006. Sea ice is frozen seawater floating on the surface of the ocean. Some sea ice is semi-permanent, persisting from year to year, and some is seasonal, melting and refreezing from season to season. The sea ice cover reaches its minimum extent at the end of each summer and the remaining ice is called the perennial ice cover. This animation shows a 3-year moving average of the perennial ice cover, or minimum sea ice concentration, for from 1979-1981 through 2004-2006. The area of the perennial ice has been steadily decreasing since the satellite record began in 1979, at a rate of about 10 per cent per decade. This decrease is evident in the animation shown here. Mastered from original, frame size 1440 x 1080.

Release details: Model release not required. Property release not required.

Keywords: 20 seconds or greater, arctic, change, color image, dataset, digitally generated image, discovery, earth observation, exploration, film, global warming, horizontal, ice, meteorology, no people, planet earth, polar climate, rotating, satellite view, sea ice minimum concentration, snow, sphere, spinning, time lapse, timelapse, zoom in

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Sea Ice Minimum Concentration

K001/0406 Rights Managed

Downloadable master

Duration: 00:00:22

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 760.3M

Original

Capture format: Digital Image Sequence

Frame size: 1440x1080

Codec: Photo - JPEG

Please contact Science Photo Library if you require the original, or other formats.

 

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