Earth  ID: 2981

Global Daily Snow and Sea Ice Surface Temperature

This animation shows the global advance and retreat of daily snow cover along with daily sea ice surface temperature over the Northern Hemisphere 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.

Visualization Credits

Cindy Starr (GST): Lead Visualizer
Greg Shirah (NASA/GSFC): Animator
Marte Newcombe (GST): Animator
Dorothy Hall (NASA/GSFC): Scientist
George Riggs (SSAI): Scientist
Please give credit for this item to:
NASA/Goddard Space Flight Center, The SeaWiFS Project and GeoEye, Scientific Visualization Studio. 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 (NOTE: In January 2013, DigitalGlobe and GeoEye combined to become DigitalGlobe).

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Data Used:
Aqua/MODIS/Sea Ice Extent and Ice Surface Temperature Daily L3 Global 4km EASE-Grid Day (MYD29E1D) 2002/07/01 - 2003/05/31
SeaStar/SeaWiFS/Monthly Land Reflectance
Terra/MODIS/Snow Cover Daily L3 Global 0.05Deg CMG (MOD10C1) 2002/07/01 - 2003/05/31, 2000/05/01 - 2000/10/31
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

This item is part of this series:
Modis Daily Snow and Sea Ice Temperature 2002-2003

Goddard TV Tape:
G2007-002HD -- NASA's HD Blue Marble Resource Tape

DLESE >> Cryology
SVS >> Seasons
SVS >> Snow Cover
GCMD >> Earth Science >> Hydrosphere >> Snow/Ice >> Ice Growth/Melt
SVS >> Sea Ice Surface Temperature
SVS >> For Educators
SVS >> Hydrosphere >> Sea Ice
SVS >> Hydrosphere >> Snow/Ice
SVS >> Arctic Circle
SVS >> Arctic Circle >> Glaciers
SVS >> Seasons >> Vegetation
NASA Science >> Earth

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version