|
Collection:
|
|
NASA Scientific Visualization Studio Collection
Collection
NASA Scientific Visualization Studio Collection
Collection
|
|
Title:
|
|
2007 Arctic Sea Ice from AMSR-E with Greenland in Foreground
Title
2007 Arctic Sea Ice from AMSR-E with Greenland in Foreground
Title
|
|
Instrument:
|
|
Aqua/AMSR-E
Instrument
Aqua/AMSR-E
Instrument
|
|
Description:
|
|
This image shows the previous record minimum sea ice which occurred on September 21, 2005.
Description
This image shows the previous record minimum sea ice which occurred on September 21, 2005.
Description
|
|
Abstract:
|
|
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.
The AMSR-E instrument on the Aqua satellite acquires high resolution measurements of the 89 GHz brightness temperature near the poles. Because this is a passive microwave sensor which is not so sensitive to atmospheric effects, this sensor is able to observe the entire polar region every day, even through clouds and snowfall. This animation progresses at a rate of six frames per day from January 1, 2007 through the minimum extent which occurred on September 14, 2007. The false color of the sea ice, derived from the AMSR-E 6.25 km 89 GHz brightness temperature, highlights the fissures or divergence areas in the sea ice cover by warm brightness temperatures (in blue) while cold brightness temperatures, shown in brighter white, represent consolidated sea ice. The sea ice edge is defined by the 15% ice concentration contour in the three-day moving average of the AMSR-E 12.5 km sea ice concentration data while ice extent is the sum of all pixels with at least 15% ice.
Abstract
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.
The AMSR-E instrument on the Aqua satellite acquires high resolution measurements of the 89 GHz brightness temperature near the poles. Because this is a passive microwave sensor which is not so sensitive to atmospheric effects, this sensor is able to observe the entire polar region every day, even through clouds and snowfall. This animation progresses at a rate of six frames per day from January 1, 2007 through the minimum extent which occurred on September 14, 2007. The false color of the sea ice, derived from the AMSR-E 6.25 km 89 GHz brightness temperature, highlights the fissures or divergence areas in the sea ice cover by warm brightness temperatures (in blue) while cold brightness temperatures, shown in brighter white, represent consolidated sea ice. The sea ice edge is defined by the 15% ice concentration contour in the three-day moving average of the AMSR-E 12.5 km sea ice concentration data while ice extent is the sum of all pixels with at least 15% ice.
Abstract
|
|
Completed:
|
|
2007-09-25
Completed
2007-09-25
Completed
|
|
Credit:
|
|
*Please give credit for this visualization to*
NASA/Goddard Space Flight Center Scientific Visualization Studio
Credit
*Please give credit for this visualization to*
NASA/Goddard Space Flight Center Scientific Visualization Studio
Credit
|
|
Studio:
|
|
SVS
|
|
Animator:
|
|
Cindy Starr (Lead)
Animator
Cindy Starr (Lead)
Animator
|
|
Scientist:
|
|
Josefino Comiso (NASA/GSFC)
Scientist
Josefino Comiso (NASA/GSFC)
Scientist
|
|
Data Collected:
|
|
2007-01-01 through 2007-09-14
Data_Collected
2007-01-01 through 2007-09-14
Data Collected
|
|
Keywords:
|
|
DLESE
|
|
Keywords:
|
|
SVS
|
|
Keywords:
|
|
GCMD
|
|
Keywords:
|
|
HDTV
|
|
Keywords:
|
|
EARTH SCIENCE
Keywords
EARTH SCIENCE
Keywords
|
|
Keywords:
|
|
Cryology
Keywords
Cryology
Keywords
|
|
Keywords:
|
|
Oceans
|
|
Keywords:
|
|
Sea Ice
Keywords
Sea Ice
Keywords
|
|
Keywords:
|
|
Cryosphere
Keywords
Cryosphere
Keywords
|
|
Keywords:
|
|
Ice Extent
Keywords
Ice Extent
Keywords
|
|
Keywords:
|
|
Sea Ice Concentration
Keywords
Sea Ice Concentration
Keywords
|
|
Keywords:
|
|
Sea Ice Motion
Keywords
Sea Ice Motion
Keywords
|
|
Keywords:
|
|
Snow/Ice
Keywords
Snow/Ice
Keywords
|
|
Keywords:
|
|
Ice Growth/Melt
Keywords
Ice Growth/Melt
Keywords
|
|
Keywords:
|
|
Hydrosphere
Keywords
Hydrosphere
Keywords
|
|
Keywords:
|
|
Ice Motion
Keywords
Ice Motion
Keywords
|
|
Keywords:
|
|
Ice Floes
Keywords
Ice Floes
Keywords
|
|
Keywords:
|
|
iPod
|
|
Keywords:
|
|
Snow/Ice Temperature
Keywords
Snow/Ice Temperature
Keywords
|
|
facet_where:
|
|
Greenland
facet_where
Greenland
facet_where
|
|
facet_where:
|
|
Goddard Space Flight Center (GSFC)
facet_where
Goddard Space Flight Center (GSFC)
facet_where
|
|
facet_when:
|
|
2005
facet_when
2005
facet_when
|
|
facet_when:
|
|
1979
facet_when
1979
facet_when
|
|
facet_when:
|
|
September 21, 2005
facet_when
September 21, 2005
facet_when
|
|
facet_when:
|
|
January 1, 2007
facet_when
January 1, 2007
facet_when
|
|
facet_when:
|
|
September 14, 2007
facet_when
September 14, 2007
facet_when
|
|
facet_what:
|
|
Earth
facet_what
Earth
facet_what
|
|
facet_what:
|
|
Aqua
facet_what
Aqua
facet_what
|
|
facet_what:
|
|
Polar
facet_what
Polar
facet_what
|
|
facet_what:
|
|
CONTOUR
facet_what
CONTOUR
facet_what
|
|
facet_what:
|
|
sea ice
facet_what
sea ice
facet_what
|
|
facet_what:
|
|
Arctic
facet_what
Arctic
facet_what
|
|
facet_when_year:
|
|
2005
facet_when_year
2005
facet_when_year
|
|
facet_when_year:
|
|
1979
facet_when_year
1979
facet_when_year
|
|
facet_when_year:
|
|
2007
facet_when_year
2007
facet_when_year
|
|
Animation Number:
|
|
3466
Animation_Number
3466
Animation Number
|
|
UID:
|
|
SPD-SCIVS-http://svs .gsfc.nasa.gov/vis/a 000000/a003400/a0034 66/seaIce_09_21_2005 _r1.1578-IMAGE
UID
SPD-SCIVS-http://svs .gsfc.nasa.gov/vis/a 000000/a003400/a0034 66/seaIce_09_21_2005 _r1.1578-IMAGE
UID
|
|
original url:
|
original_url
original url
|
