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Alaskan Fire Fuel Components

Submitted by ORNL DAAC Staff on 2020-01-30
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Examples of fractional cover distribution in a tundra region near Lake Narvakrak in the Noatak River National Preserve: (a) very high-resolution imagery from Google Earth; (b) fractional cover of woody component; (b) fractional cover of herbaceous component; (d) fractional cover of nonvascular component.

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Maps of three major wildland fire fuel types are available from the Arctic-Boreal Vulnerability Experiment.

MODIS-Derived Snowmelt Timing Maps, Version 2

Submitted by ORNL DAAC Staff on 2020-01-30
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Mean snowmelt Day of Year (DOY) for the years 2001-2018 for North America. The DOY values for snowmelt timing were identified by observing the transition from snow-cover to no-snow for individual MODIS pixels throughout the annual melt period.

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The second version of snowmelt timing maps for North America is available for the period 2001 through 2018.

Arctic Whole Air Samples

Submitted by ORNL DAAC Staff on 2020-01-30
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Arctic-CAP flights consisted of vertical profile maneuvers from near the surface to 6 km altitude around the ABoVE domain each month. Profiles were flown at each of the 25 locations listed across the top of this figure.

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Atmospheric gas concentrations collected during the Arctic Carbon Aircraft Profile (Arctic-CAP) campaigns are now available.

High Latitude Blue Sky Albedo

Submitted by ORNL DAAC Staff on 2020-01-27
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Daily mean shortwave blue sky albedo for February 28, 2000. Blue sky refers to albedo calculated under real-world conditions with a combination of both diffuse and direct lighting based on atmospheric and view-geometry conditions.

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Daily “blue sky” shortwave albedo data were derived from the MODIS bi-directional reflectance distribution function.

Historical and Future Leaching from the Mississippi River Basin

Submitted by ORNL DAAC Staff on 2020-01-20
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Spatial distribution of mean dissolved inorganic carbon (DIC) leaching (g c/m2/yr) in the 2090s estimated by S(ALL) simulation experiment (including future climate, elevated CO2, and land use changes). Climate change scenarios were derived from three climate models named CCSM3 (panels a and b), ECHAM (c and d), and CCCMA (e and f) under high (A2) and low (B1) emission scenarios, respectively.

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New data from the Carbon Monitoring System (CMS) offers insights into how environmental factors affect the dynamics of leaching.