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ACT-America CO2 and CH4 Merge Data

ACT-America is a NASA campaign to study carbon transport in the atmosphere

ACT-America is a NASA Earth Venture Suborbital-2 mission to study the transport and fluxes of atmospheric carbon dioxide and methane across three regions in the eastern United States.

Merged airborne atmospheric gas and navigational data from the Summer 2016 and Winter 2017 campaigns are now available.

Who uses NASA Earthdata? Dr. Roisin Commane does!

Dr. Commane NASA ATom

Dr. Commane aboard NASA's DC-8 research aircraft during ATom. Photo by Dr. Bernadett Weinzierl, Univ. of Vienna, and courtesy of Dr. Commane.

Dr. Commane uses NASA data to understand surface processes affecting atmospheric chemistry.

Learning Resources at ORNL DAAC

Screenshot of Learning Page

A new Learning Resources Page is now available to provide user support for ORNL DAAC products and services.


Modeled WRF-STILT Footprints for Boston, MA

Data from the WRF-STILT model representing the response of a receptor in Boston, Massachusetts

Estimated surface influence on the carbon dioxide concentration at a receptor in Boston, Massachusetts (ppm/umol m-2 s-1).

Modeled footprint products estimate the influence of upwind surface fluxes on observed carbon dioxide and methane concentrations.

Year-round Data from Alaskan Flux Towers

Three tower sites at Barrow, Alaska

Three tower sites at Barrow, Alaska: Barrow Environmental Observatory (BEO) tower, Biocomplexity Experiment, South (BES) tower, and the Climate Monitoring and Diagnostics Laboratory (CMDL) tower.

NASA's ABoVE campaign provides year-round CO2, CH4, and meteorology at five sites on Alaska's North Slope.

MODIS Web Service updated to a RESTful API

MODIS Web Services

MODIS Web Services offered by the ORNL DAAC

A new RESTful Application Interface (API) has been released for the ORNL DAAC MODIS Web Service.

Daymet Climatologies Updated

Daymet V3 average annual minimum temperature for 1980 and 2015

Daymet V3 average annual minimum temperature for 1980 and 2015 for a subset of the Daymet domain in Alaska and western Canada.

Daymet V3 annual and monthly climatologies for minimum and maximum temperature, precipitation, and vapor pressure have been updated to include year 2017.

Peak Greenness in the Canadian Boreal Forest

The Canadian boreal forest study area and the 46 sites used in the analysis mapped on top of AVHRR NDVI trends from Beck and Goetz (2011)

Sites used in this study are shown with AVHRR NDVI trends from Beck and Goetz (2011). Figure from Sulla-Menashe et al. (2018)

A new ABoVE dataset provides a 28-year time series of peak greenness data derived from Landsat 5 TM imagery over the Boreal forest region of Canada.

Modeled WRF-STILT Footprints for Barrow, Alaska

Plot of the footnearfield1 variable for 0.1 degree gridded STILT footprint model output for August 15,1982 near the receptor location at Barrow, Alaska.

Plot of the 0.1 degree gridded STILT footprint model output for August 15, 1982 near the receptor location at Barrow, Alaska. This variable provides 24 hours of surface influence representing the response of the receptor to a unit surface emission (ppm/umol m-2 s-1) of CO2 in each grid cell within a small region close to the measurement location. (From the data file

Land surface influence on atmospheric CO2 and CH4 concentrations in Barrow, Alaska was simulated for 12 selected years from 1982 to 2011 as part of the ABoVE campaign.

ACT-America Flight Data

Flight Altitude and Heading for the B-200 aircraft flight flown on July 11, 2016

Aircraft altitude and heading for the B-200 aircraft during a flight on July 11, 2016 as shown by the ORNL DAAC Airborne Data Visualization.

Conditions recorded by ACT-America flights over Eastern North America are presented in a new dataset.