Daily Snow and Sea Ice Temperature over North America
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This animation shows the global advance and retreat of daily snow cover along with daily sea ice surface temperature over North America from September 2002 through May 2003. The snow cover was measured by the MODIS instrument on the Terra satellite, while the sea ice surface temperature was measured by the MODIS instrument on the Aqua satellite. Since these instruments cannot take measurements through clouds, in cloud-covered regions or areas with suspect data quality, the prior day's value is retained until a valid data reading is obtained. This visualization designates an area as covered by snow when the instrument takes a valid measurement showing greater than ~50% snow coverage in that area. This area is assumed to be snow covered until the instrument takes a valid measurement showing less than 40% snow coverage in that same area. A color bar indicates the sea ice surface temperature values. The satellite instruments are unable to collect data through darkness. The region in polar darkness is shown as a gray cap over the pole that grows and shrinks seasonally. A date slider indicates the progression of time. SeaWiFS Land Reflectance shows the seasonal changes in land cover.
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This animation shows the daily advance and retreat of snow cover, and sea ice surface temperature over North America during the winter of
2002-2003.
Duration: 56.0 seconds
Available formats:
512x288 (30 fps)
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320x180
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720x480 (29.97 fps)
MPEG-2
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1280x720 (30 fps)
Multiplexed
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123 MB
1280x720 (30 fps)
Frames (TimeBarOverlay)
1280x720 (30 fps)
Frames (NAmerSnowIce)
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This image shows the snow cover and sea ice surface
temperature over North America on February 9, 2003.
Available formats:
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This color bar shows the colors used to represent the sea ice surface temperature. The coldest water is shown in light blue.
The warmest sea ice is shown in shades of pink. As the sea ice surface temperatures cool below -15 degrees Celsius, the color is shown in shades of purple. The sea ice surface below -28 degrees Celsius is shown in shades of blue-grey.
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| Animation Number: | 2983 |
| Animators: | Cindy Starr (SVS) (Lead) |
| | Greg Shirah (SVS) |
| | Marte Newcombe (SVS) |
| Completed: | 2004-09-10 |
| Scientists: | Dorothy Hall (NASA/GSFC) |
| | George Riggs (SSAI) |
| Instruments: | Aqua/MODIS
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| | SeaStar/SeaWiFS |
| | Terra/MODIS |
| Data sets: | MODIS/Terra Snow Cover Daily L3 Global 0.05Deg CMG (MOD10C1)
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| | MODIS/Aqua Sea Ice Extent and Ice Surface Temperature Daily L3 Global 4km EASE-Grid Day (MYD29E1D) |
| | SeaWiFS Monthly Land Reflectance |
| Data Collected: | 2002/07/01 - 2003/05/31, 2000/05/01 - 2000/10/31 |
| Series: | Modis Daily Snow and Sea Ice Temperature 2002-2003 |
| Goddard TV Tape: | G2007-002HD -- NASA’s HD Blue Marble Resource Tape |
Keywords:
DLESE
>> Cryology
SVS
>> HDTV
SVS
>> Snow Cover
SVS
>> Sea Ice Surface Temperature
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Please give credit for this item to
NASA/Goddard Space Flight Center,
Scientific Visualization Studio,
The SeaWiFS Project and GeoEye.
NOTE: All SeaWiFS images and data presented on this web site are for research and educational use only. All commercial use of SeaWiFS data must be coordinated with GeoEye (http://www.geoeye.com).
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