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Comparison of Minimum Sea Ice Between 2005 and 2007 - Split Screen
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. The 2007 Arctic summer sea ice has reached the lowest extent of perennial ice cover on record - nearly 25% less than the previous low set in 2005. The area of the perennial ice has been steadily decreasing since the satellite record began in 1979, at a rate of about 10% per decade. But the 2007 minimum, reached on September 14, is far below the previous record made in 2005 and is about 38% lower than the climatological average. Such a dramatic loss has implications for ecology, climate and industry.

This animation compares the difference between the perennial sea ice minimum extent on September 21, 2005 and September 14, 2007. With a split screen, the area of the melted region is compared with the size of the state of California.


This animation shows a two zooms on a split screen: one to the United States and the other to the Arctic. The Arctic shows the 2005 sea ice minimum extent and fades to show the 2007 minimum extent. The state of California is placed in the melt region as a comparison of the area of the region.    This animation shows a two zooms on a split screen: one to the United States and the other to the Arctic. The Arctic shows the 2005 sea ice minimum extent and fades to show the 2007 minimum extent. The state of California is placed in the melt region as a comparison of the area of the region.
Duration: 20.0 seconds
Available formats:
  320x180     PNG           240 KB
  160x80       PNG           60 KB
  80x40         PNG           15 KB
  640x360 (30 fps) MPEG-4   1 MB
  1280x720 (30 fps) MPEG-4   8 MB
  1280x720 (30 fps) Frames (Composite)
  1280x720 (60 fps) Frames (Composite)
  512x288 (30 fps) MPEG-1   3 MB
  1280x720 (30 fps) MPEG-2   13 MB
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This is the background frame of the above animation without any text, state line or California overlay.    This is the background frame of the above animation without any text, state line or California overlay.

Available formats:
  320x180     PNG           237 KB
  1280x720 (30 fps) Frames (Background)
  1280x720 (60 fps) Frames (Background)
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This contains only the overlay of the first movie consisting of text, state lines and California with a transparent background.    This contains only the overlay of the first movie consisting of text, state lines and California with a transparent background.

Available formats:
  320x180     PNG           6 KB
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  1280x720 (60 fps) Frames (Overlay)
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This image shows the 2005 minimum sea ice and compares its area to that of the state of California.    This image shows the 2005 minimum sea ice and compares its area to that of the state of California.

Available formats:
  3840 x 2160     TIFF 18 MB
  320 x 180         PNG 241 KB


This image shows the 2005 minimum sea ice (in orange) compared to the 2007 minimum sea ice (in white). The difference in the minimum ice extent between 2005 and 2007 vastly exceeds the area of the state of California.    This image shows the 2005 minimum sea ice (in orange) compared to the 2007 minimum sea ice (in white). The difference in the minimum ice extent between 2005 and 2007 vastly exceeds the area of the state of California.

Available formats:
  3840 x 2160     TIFF 18 MB
  320 x 180         PNG 243 KB


This image shows the 2005 minimum sea ice (in orange) compared to the 2007 minimum sea ice (in white). A green region the size of the state of California is overlain on the melted area to serve as a reference.    This image shows the 2005 minimum sea ice (in orange) compared to the 2007 minimum sea ice (in white). A green region the size of the state of California is overlain on the melted area to serve as a reference.

Available formats:
  3840 x 2160     TIFF 18 MB
  320 x 180         PNG 244 KB

Animation Number:3470
Animators:Cindy Starr (SVS) (Lead)
 Greg Shirah (SVS)
Completed:2007-09-28
Scientist:Josefino Comiso (NASA/GSFC)
Instrument:DMSP/SSMI
Data set:Comiso's September Minimum Sea Ice Concentration
Data Collected:2005-09-21 and 2007-09-14
Keywords:
DLESE >> Cryology
SVS >> HDTV
GCMD >> EARTH SCIENCE >> Cryosphere
GCMD >> EARTH SCIENCE >> Cryosphere >> Sea Ice
GCMD >> EARTH SCIENCE >> Cryosphere >> Snow/Ice
GCMD >> EARTH SCIENCE >> Hydrosphere >> Snow/Ice
GCMD >> EARTH SCIENCE >> Oceans >> Sea Ice
GCMD >> EARTH SCIENCE >> Cryosphere >> Sea Ice >> Ice Extent
GCMD >> EARTH SCIENCE >> Cryosphere >> Sea Ice >> Pack Ice
GCMD >> EARTH SCIENCE >> Cryosphere >> Sea Ice >> Sea Ice Concentration
GCMD >> EARTH SCIENCE >> Cryosphere >> Snow/Ice >> Freeze/Thaw
GCMD >> EARTH SCIENCE >> Cryosphere >> Snow/Ice >> Ice Extent
GCMD >> EARTH SCIENCE >> Cryosphere >> Snow/Ice >> Ice Growth/Melt
GCMD >> EARTH SCIENCE >> Hydrosphere >> Snow/Ice >> Ice Extent
GCMD >> EARTH SCIENCE >> Oceans >> Sea Ice >> Ice Extent
GCMD >> EARTH SCIENCE >> Oceans >> Sea Ice >> Ice Growth/Melt
GCMD >> EARTH SCIENCE >> Oceans >> Sea Ice >> Pack Ice
SVS >> iPod
 
 
Please give credit for this item to
NASA/Goddard Space Flight Center Scientific Visualization Studio
The Blue Marble data is courtesy of Reto Stockli (NASA/GSFC).


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