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ABoVE

AVIRIS-NG Spectra from ABoVE

Hyperspectral imagery captured for ABoVE during a flight of the AVIRIS-NG instrument

Hyperspectral imagery captured for ABoVE during a flight of the AVIRIS-NG instrument over the Alaskan Arctic.

Surface reflectance was measured along more than 400 flight lines during the intensive 2017 ABoVE airborne campaign.

Impact of Snow Cover on Dall Sheep

Measurement of snowpack characteristics and track sink depths at a Dall sheep (Ovis dalli dalli) track site in March 2017

Measurement of snowpack characteristics and track sink depths at a Dall sheep (Ovis dalli dalli) track site in March 2017 on Jaeger Mesa, Wrangell St. Elias National Park and Preserve, Alaska (from Sivy et al., 2018).

Research from NASA's ABoVE campaign examines how snow characteristics may affect populations of Dall sheep.

Permafrost Thaw Depth in Alaska

Locations of thaw depth measurement sites.

Locations of thaw depth measurement sites. Three of the locations are paired unburned-burned sites.

New data from ABoVE provide thaw depth at burned and unburned sites across Alaska.

Regional Methane Flux Estimates Over Alaska

Monthly mean CH4 flux estimates.

Monthly mean CH4 flux estimates for Alaska. Values are centered on the mean measurement date for a given month and the shaded regions are the standard error of the mean (figure from Hartery et al. 2018).

A new dataset from NASA's Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) provides gridded methane flux estimates from 2012-2014.

Mapping Shrub Biomass in the Arctic

Location of study area in northern Alaska.

Location of Toolik Lake study area in northern Alaska. Detail view shows three LiDAR collection footprints in pale green. Red crosses indicate locations of shrub harvest areas within the Toolik LiDAR footprint (figure from Greaves et al., 2016).

LiDAR and orthophotography were used to estimate aboveground shrub biomass near Toolik Lake, AK.

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