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Carbon Sources and Sinks Over North America

Gross Primary Productivity

Mean gross primary productivity (GPP) for the conterminous US and North America in grams of carbon per unit area per month.

Modeled estimates of biogenic CO2 exchanges between land and atmosphere across portions of North America are available.

Surveying the Ecological Effects of Fire on Alaska's Yukon-Kuskokwim Delta

Map of Cover according to Plant Functional Types

Vegetation point-intercept (VPI) any-hit cover metric data were combined with Landsat imagery to develop fractional maps of any-hit cover for four aggregated plant functional types (PFTs); shrubs bryophytes, lichen, and herbs for the upland tundra area of the Y-K Delta, Alaska. VPI data were collected from plots in areas burned in 1971, 1985, 2005, and 2015.

Ecological field data and maps of vegetation cover spanning gradients of fire history in upland tundra are available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

Recent NASA Article Highlights Daymet

Input weather stations are mapped onto a DEM across North America.

Each black dot on this digital elevation map (DEM) represents a surface weather station in continental North America providing Daymet data in 2010. Additional stations providing Daymet data are located in Puerto Rico and Hawaii.

Daymet derived annual average of daily minimum temperature, 1980 (left) and 2019 (right), for a subset of North America. Images are scaled from -20 to +20 degrees C.

Explaining Vegetation Greening Trends in Yellowstone

Map of NDVI in Greater Yellowstone Ecosystem

Trends in maximum annual NDVI for natural vegetation within the Greater Yellowstone Ecosystem (GYE) from 1989 to 2014 (Emmett et al. 2019).

Daymet and North American Carbon Program (NACP) data were used to study Normalized Difference Vegetation Index (NDVI) trends across the Greater Yellowstone Ecosystem.

Burn Severity Index of Canadian Ecoregions

Map of study area.

Study area included sites burned in 2014 and 2015 in the southeastern portion of the Northwest Territories and northern Alberta of Canada. The study area includes all 2014 and 2015 fires within a radius of approximately 300 km from Great Slave Lake.

Pre- and post-fire Landsat images were used to classify burn severity of soil organic matter across portions of arctic Canada.