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Snow Cover & Net Primary Productivity

Global Map Snow Cover Image 1 Global Map Snow Cover Image 2 Global Map Snow Cover Image 3 Global Map Snow Cover Image 4 Global Map Snow Cover Image 5 Global Map Snow Cover Image 6 Global Map Snow Cover Image 7 Global Map Snow Cover Image 8 Global Map Snow Cover Image 9 Global Map Snow Cover Image 10 Global Map Snow Cover Image 11 Global Map Snow Cover Image 12 Global Map Snow Cover Image 13 Global Map Snow Cover Image 14 Global Map Snow Cover Image 15 Global Map Snow Cover Image 16 Global Map Snow Cover Image 17 Global Map Snow Cover Image 18 Global Map Snow Cover Image 19 Global Map Snow Cover Image 20 Global Map Snow Cover Image 21 Global Map Snow Cover Image 22 Global Map Snow Cover Image 23 Global Map Snow Cover Image 24 Global Map Snow Cover Image 25 Global Map Snow Cover Image 26 Global Map Snow Cover Image 27 Global Map Snow Cover Image 28 Global Map Snow Cover Image 29 Global Map Snow Cover Image 30 Global Map Snow Cover Image 31 Global Map Snow Cover Image 32 Global Map Snow 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Snow Cover
Snow Cover Scale
Net Primary Productivity
Net Primary Productivity Scale
Global Map Net Primary Productivity Image 1 Global Map Net Primary Productivity Image 2 Global Map Net Primary Productivity Image 3 Global Map Net Primary Productivity Image 4 Global Map Net Primary Productivity Image 5 Global Map Net Primary Productivity Image 6 Global Map Net Primary Productivity Image 7 Global Map Net Primary Productivity Image 8 Global Map Net Primary Productivity Image 9 Global Map Net Primary Productivity Image 10 Global Map Net Primary Productivity Image 11 Global Map Net Primary Productivity Image 12 Global Map Net Primary Productivity Image 13 Global Map Net Primary Productivity Image 14 Global Map Net Primary Productivity Image 15 Global Map Net Primary Productivity Image 16 Global Map Net Primary Productivity Image 17 Global Map Net Primary Productivity Image 18 Global Map Net Primary Productivity Image 19 Global Map Net Primary Productivity Image 20 Global Map Net Primary Productivity Image 21 Global Map Net Primary Productivity Image 22 Global Map Net 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Global Map Net Primary Productivity Image 155 Global Map Net Primary Productivity Image 156 Global Map Net Primary Productivity Image 157 Global Map Net Primary Productivity Image 158 Global Map Net Primary Productivity Image 159 Global Map Net Primary Productivity Image 160 Global Map Net Primary Productivity Image 161 Global Map Net Primary Productivity Image 162 Global Map Net Primary Productivity Image 163 Global Map Net Primary Productivity Image 164 Global Map Net Primary Productivity Image 165 Global Map Net Primary Productivity Image 166 Global Map Net Primary Productivity Image 167 Global Map Net Primary Productivity Image 168 Global Map Net Primary Productivity Image 169 Global Map Net Primary Productivity Image 170 Global Map Net Primary Productivity Image 171 Global Map Net Primary Productivity Image 172 Global Map Net Primary Productivity Image 173 Global Map Net Primary Productivity Image 174 Global Map Net Primary Productivity Image 175 Global Map Net Primary 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Net Primary Productivity Image 198 Global Map Net Primary Productivity Image 199 Global Map Net Primary Productivity Image 200 Global Map Net Primary Productivity Image 201

The snow cover map shows the fraction of an area covered by snow on a monthly basis. Measurements were made by the MODIS sensor on NASA’s Terra satellite. Gray indicates land areas with no snow, darkest blue represents minimal snow cover, and solid white indicates 100 percent snow cover. Because MODIS relies on visible light to assess snow cover, the sensor cannot collect data over the highest latitudes of the Northern Hemisphere during winter when no sunlight reaches the polar region.

These maps show net primary productivity, which is how much carbon dioxide vegetation takes in during photosynthesis minus how much carbon dioxide the plants release during respiration (metabolizing sugars and starches for energy) or decay. The data come from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. Values range from near 0 grams of carbon per square meter per day (tan) to 6.5 grams per square meter per day (dark green). A negative value means decomposition or respiration overpowered carbon absorption; more carbon was released to the atmosphere than the plants took in.

View, download, or analyze more of these data from NASA Earth Observations (NEO):
Snow Cover
Net Primary Productivity