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Model-Derived CO2 Biogenic Fluxes

Gross Primary Productivity

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

Carbon fluxes and uncertainties are available from the Atmospheric Carbon and Transport - America (ACT-America) project.

Open Water Pixel Masks from ABoVE Flight Paths

AirSWOT Imagery

Example of color-infrared imagery shown alongside the corresponding semi-automated open water classification at Old Crow Flats, Alaska.

AirSWOT imagery from the 2017 Arctic-Boreal Vulnerability Experiment (ABoVE) was used to create water masks across parts of Canada and Alaska.

Boreal Forest Burned and Unburned Site Comparisons

Image of a burned field site.

A typical burned plot in the Saskatchewan, Canada, boreal forest study area.

Fire history and field measurements were used to estimate above- and belowground carbon values.

Boreal & Tundra Soil Respiration Data

Images of field instruments.

(A) A Soil Respiration Station (SRS), (B) a SRS data logger, and (C) a Forced Diffusion Chamber (FD chamber) deployed at a boreal forest site in central Alaska.

Data collected by soil respiration stations installed at boreal and tundra sites are available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

Yaxing Wei Named Lead Scientist

Image of Yaxing Wei

Yaxing Wei has been named Lead Scientist of the ORNL DAAC.

Geospatial information scientist, Dr. Yaxing Wei, is the new ORNL DAAC Lead Scientist.

Forest Biomass Maps Derived from Disturbance History

Map of biomass.

Biomass (Mg ha-1) for the northern Minnesota site.

Six Landsat focus sites were used to produce disturbance history and forest biomass maps.

Moose Hunting Season Environmental Conditions in Alaska

Map of study area communities.

Map of study area communities. GMUs are Game Management Units and GMU21D is highlighted.

Environmental conditions during moose hunting season for 2000-2016 are available for rural Alaska.

Alaskan Fire Fuel Components

Four maps showing fractional cover distribution.

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.

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

MODIS-Derived Snowmelt Timing Maps, Version 2

Map of snowmelt date.

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.

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

Arctic Whole Air Samples

Graph showing vertical profile maneuvers.

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.

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

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