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Soil Temperature Profiles Characterize Permafrost at USArray Sites

Map of soil profile study sites.

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.

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

DLR Falcon and NASA DC-8 aircrafts

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.

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

ACT-America: L3 Integrated Measurements and 2019 Data

Map of ACT-America 2019 Flight Paths

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.

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

Map of Alaska showing snow depth.

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).

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

ACT-America Housekeeping Data Updated

The ACT-America team on tarmac in Shreveport, Louisiana.

The ACT-America team on the tarmac with the B-200 King Air and C-130 Hercules NASA aircraft in Shreveport, Louisiana.

A new version of meteorological and aircraft navigational data is available from the Atmospheric Carbon and Transport-America project.

Spatial Patterns in Methane Fluxes of Arctic Vegetation

Chamber located in a grass field.

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.

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

Improved LiDAR-derived Biomass for Sonoma County, CA

Aboveground biomass graphical map for Sonoma County.

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.

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

NASA Data Helps Researcher Understand Coastal Mangrove Forests

Selfie of Dr. David Lagomasino in the field.

Dr. David Lagomasino uses satellite, airborne, drone, and ground measurements to identify areas of coastal resilience and vulnerability.

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

THREDDS NetCDF Subsetting Service Bug Fixed

Unidata TDS

Unidata's THREDDS Data Server (TDS) is a web server that provides metadata and data access for scientific datasets, using a variety of remote data access protocols.

A bug has been fixed in the THREDDS Data Server (TDS) NetCDF Subsetting Service (NCSS) that may, in rare cases, have returned incorrect results.

NASA Earthdata Webinar: GEDI Level-1 and -2 Data

GEDI logo and demonstration of data.

The Find and Use GEDI, You Will—Getting Started with Global Ecosystems Dynamics Investigation (GEDI) Lidar Data webinar will be held on Wednesday, June 24, from 2 to 3 PM EST.

The Land Processes (LP) DAAC will get you started with GEDI data on Wednesday, June 24.