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Sub-Saharan Africa High Res Woody Cover and Biomass Estimates

Submitted by ORNL DAAC Staff on 2020-07-19
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Estimates of woody biomass (tree and shrubs) at 1-km resolution in megagrams per hectare (Mg ha-1). Biomass was estimated from canopy cover, canopy height, and tree allometry.  Source: C.W. Ross

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Estimates of woody cover and biomass across sub-Saharan Africa were derived from observations, tree allometry equations, and remote-sensing products.

Soil Temperature Profiles Characterize Permafrost at USArray Sites

Submitted by ORNL DAAC Staff on 2020-07-17
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Sixteen measurement sites located across interior Alaska, USA, and at one site in Yukon, Canada. Sites C17K, C26K, E23, F17, H31, and I17 are collocated with the seismic stations.

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New soil temperature profile measurements collected at USArray stations are available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

Comparison of In-Situ Measurements from NASA Airborne Campaigns

Submitted by ORNL DAAC Staff on 2020-07-16
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Left: The DLR Falcon used for the SALTRACE 2013 and the A-LIFE 2017 campaigns. Right: The NASA DC-8 aircraft used during the ATom missions sitting at the Pago Pago International Airport, American Samoa.

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A new dataset from the Atmospheric Tomography Mission (ATom) compares airflow and aerosol particles.

ACT-America: L3 Integrated Measurements and 2019 Data

Submitted by ORNL DAAC Staff on 2020-07-15
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ACT-America 2019 summer airborne campaign showing the flight paths for the two aircrafts and location of ground towers. Flights were concentrated on three study domains: northeast, south-central, and midwest regions of the United States.

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A new version of merged in situ atmospheric trace gases and flask data from the Atmospheric Carbon and Transport-America project is now available.

High Res/Cloud-Free Snow Cover Extent and Depth

Submitted by ORNL DAAC Staff on 2020-07-13
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Downscaled MERRA-2 snow depth (in meters) data. Images show snow depth for two time periods: spring snow melt for 23-30 April, 2007 (left) and during early snow accumulation for 30 September-7 October, 2007 (right).

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One kilometer resolution, cloud-free snow cover extent and snow depth data are available for Alaska from 2001 to 2017.

Improved LiDAR-derived Biomass for Sonoma County, CA

Submitted by ORNL DAAC Staff on 2020-07-06
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Estimated aboveground biomass (Mg/ha) for Sonoma County at 30 m spatial resolution with the 5th-95th percentile range and the standard deviation (SD) of per-pixel biomass estimates shown in the top left and bottom left, respectively.

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A new dataset used a parametric modeling approach to estimate biomass from airborne LiDAR data and field measurements.

Spatial Patterns in Methane Fluxes of Arctic Vegetation

Submitted by ORNL DAAC Staff on 2020-07-06
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The custom-built chamber for measuring in situ trace gas fluxes from soil/vegetation and water surfaces. The chamber (~ 0.5 m3) provides adequate height to enclose emergent grasses and reeds.

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A new dataset provides diffusive methane (CH4) fluxes of emergent and upland vegetation at two thermokarst lakes in Alaska.

NASA Data Helps Researcher Understand Coastal Mangrove Forests

Submitted by ORNL DAAC Staff on 2020-06-25
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Dr. David Lagomasino uses satellite, airborne, drone, and ground measurements to identify areas of coastal resilience and vulnerability.

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Dr. David Lagomasino uses NASA data to study how the Earth's landscape responds to changes caused by natural events and rapid urban expansion.