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NASA Earthdata Article Highlights Delta-X Airborne Mission

Submitted by ORNL DAAC Staff on 2021-04-14
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Delta-X is a 5-year NASA Earth Venture Suborbital-3 mission to study the subsidence and growth of the Mississippi River Delta in the United States. 

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NASA researchers are using high resolution airborne data to determine vulnerability and resilience of the Mississippi River Delta.

Sea Water Elevation Profile and Change from Pre-Delta-X Campaign Datasets

Submitted by ORNL DAAC Staff on 2021-04-05
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Collage of dataset airborne imagery from AirSWOT, UAVSAR and the ASO lidar instrument provide examination of water level elevation estimates and changes.

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Five Pre-Delta-X Airborne datasets recently published provide sea water level profile and change derived from UAVSAR, AirSWOT, and lidar.

Pre-Delta-X: AVIRIS-NG/UAVSAR AGB, AVIRIS-NG TSS and Surface Reflectance

Submitted by ORNL DAAC Staff on 2021-04-05
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Pre-DeltaX image highlights: AVIRIS-NG/UAVSAR Biomass (upper left), AVIRIS-NG Total Suspended Solids (lower left), and AVIRIS-NG Surface Reflectance (right).

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Pre-Delta-X Campaign datasets now available: AGB from AVIRIS-NG/UAVSAR, surface reflectance and total suspended solids from AVIRIS-NG.

The First Campaign of NASA's Delta-X Mission is Now in Progress

Submitted by ORNL DAAC Staff on 2021-04-05
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The Channel Team's water filtering lab inside a local cabin. The team will process 800 liters of water to extract as little as ~100mg of material found in a liter of Mississippi water.

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NASA's Delta-X Mission combines airborne remote sensing and field measurements to analyze water levels, vegetation, and sediment to understand how and where the Mississippi River Delta is changing.

Wolf Denning Phenology and Reproduction in ABoVE Core Domain, 2000-2017

Submitted by ORNL DAAC Staff on 2021-03-24
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Spatial distribution of eight wolf study populations used in an assessment (from 2000-2017) of denning phenology in response to climate signals. The base map shows the day of the year representing the NDVI-derived start of the growing season in 2010. 

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Eighteen years of annual gray wolf (Canis lupus) denning spatial information and timing across within the NASA ABoVE Core Domain recently published.

Digital Elevation Models for the Global Change Research Wetland

Submitted by ORNL DAAC Staff on 2021-03-24
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DEM of the Global Change Research Wetland (GCReW) site generated using the LEAN (LiDAR Elevation Correction with NDVI) method. LEAN uses ground measurements of elevation and NDVI in a multivariate linear regression model to estimate vertical bias.

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Four digital elevation models (DEMs) at 1-m resolution and 2106 model performance metrics for the GCReW site, Maryland, USA are now available.

Active Layer Thickness Derived from Airborne L- and P-band SAR

Submitted by ORNL DAAC Staff on 2021-03-24
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Sites in Version 2 of the Permafrost Dynamics Observatory Project product. Green = data delivered in Version 2. Red = not delivered in Version 2 but will be delivered in future version. Yellow = not processed due to only L-band data being available.

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Estimates of seasonal subsidence, ALT, vertical soil moisture profile, and uncertainties at a 30-m resolution for 28 sites across the ABoVE domain are now available.

Annual Estimates of Global Riverine Nitrous Oxide Emissions

Submitted by ORNL DAAC Staff on 2021-03-24
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Riverine N2O emission estimates from headwater streams (a, c, and e) and high-order rivers (b, d, and f) for the 1900s, 1960s, and 2000s. The right panel shows the latitudinal distribution of riverine N2O emissions with the uncertainty range as the standard deviation (shaded areas).

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Modeled estimates of annual NO2 emissions for two sets of global rivers and streams covering years 1900-2016 available.