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Webinar: MODIS and VIIRS Data at your Fingertips

Data from VIIRS is now available through the ORNL DAAC online subsetting tools.

The ORNL DAAC provides user-friendly access to VIIRS and MODIS data through a suite of online tools and APIs.

Join us on August 16 to learn how to discover, subset, access and visualize MODIS and VIIRS data products using a suite of user-friendly tools.

Canopy Structure in the Great Smoky Mountains

Map showing thirty unique vegetation canopy structure classes in Great Smoky Mountain National Park

This overview map shows thirty unique vegetation canopy structure classes identified within the Great Smoky Mountain National Park in Tennessee and North Carolina, USA.

This revised dataset characterizes canopy structure based on LiDAR surveys of the Great Smoky Mountains National Park.

Aboveground Biomass of California Forests

Per-tree AGB (kg) derived from LiDAR

Per-tree aboveground biomass (kg) derived from LiDAR-measured tree heights for the Blacksmith site in 2012.

A new dataset provides LiDAR-derived estimates of aboveground biomass from locations throughout California between 2005 and 2014.

Wildfire Burn Severity Across Alaska and Canada

30-m dNBR for a burn scar in ABoVE grid tile Bh05Bv03

The differenced Normalized Burned Ratio (dNBR) for a burn scar from fires in 2015 within ABoVE grid tile Bh05Bv03. A higher dNBR indicates a higher fire severity.

New data from NASA's ABoVE campaign provides a high-resolution record of differenced Normalized Burned Ratio (dNBR) for fires from 1985-2015.

ACT-America Winter 2017 Data Now Available

ACT-America team on tarmac in Shreveport, LA.

The ACT-America team on the tarmac with the NASA Langley Beechcraft B-200 King Air and NASA GSFC C-130-H Hercules aircraft in Shreveport, LA.

Data from the Winter 2017 campaign has been added to all ACT-America datasets.

Carbon Fluxes in Coastal Ecosystems

Study domain for mean annual fluxes of carbon in Coastal Ecosystems of Eastern North America

Study domain indicating locations of estuaries and shelf waters in the three subregions: the Gulf of Maine (GOM), the Mid-Atlantic Bight (MAB), and the South Atlantic Bight (SAB; From Najjar et al. 2018).

New data from the North American Carbon Program (NACP) provide mean annual carbon fluxes in coastal areas of Eastern North America.

AfriSAR Measures African Forests

A researcher records data on the mangrove forest.

Goddard Space Center’s Dr. Laura Duncanson records data on tree heights and diameters in the Pongara mangrove forest during field work in 2016. (Credit: NASA/Carla Thomas)

NASA's AfriSAR campaign provides critical data on canopy height and structure of tropical forests in Gabon, West Africa.

Daymet Goodness-of-Fit Statistics for 2017

Daymet station-level cross-validation statistics for year 2016

Station-level cross validation of Daymet at weather station locations showing annual mean absolute error (MAE; degrees C) for the variable maximum temperature (tmax) in 2016.

Daymet provides information to access the accuracy and uncertainty of modeled climate data at each ground station location or two-degree tile.

Custom Subsets of VIIRS Land Products

true color reflectance image from VIIRS

VIIRS/S-NPP true color reflectance image (Red = Band I1, Green = Band M4, Blue = Band M3) from May 7, 2018, visualized in NASA’s WorldView.

VIIRS land products are now available for visualization and download from ORNL DAAC's MODIS subsetting tools suite.

Updates to Tower-based ACT-America Data

ACT-America combines ground-based, airborne, and satellite observations of greenhouse gases.

ACT-America combines ground-based, airborne, and satellite observations of greenhouse gases.

Measurements of CO2, CO, and CH4 concentrations at tower sites have been updated to include years 2015 - 2017.