DAAC Home > Resources > News

News

Arctic

Boreal & Tundra Soil Respiration Data

Submitted by ORNL DAAC Staff on 2020-02-17
Image Media
Image Media
Caption

(A) A Soil Respiration Station (SRS), (B) a SRS data logger, and (C) a Forced Diffusion Chamber (FD chamber) deployed at a boreal forest site in central Alaska.

Body

Data collected by soil respiration stations installed at boreal and tundra sites are available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

Burn Severity Index of Canadian Ecoregions

Submitted by ORNL DAAC Staff on 2020-02-17
Image Media
Image Media
Caption

Study area included sites burned in 2014 and 2015 in the southeastern portion of the Northwest Territories and northern Alberta of Canada. The study area includes all 2014 and 2015 fires within a radius of approximately 300 km from Great Slave Lake.

Body

Pre- and post-fire Landsat images were used to classify burn severity of soil organic matter across portions of arctic Canada.

High Latitude Blue Sky Albedo

Submitted by ORNL DAAC Staff on 2020-01-27
Image Media
Image Media
Caption

Daily mean shortwave blue sky albedo for February 28, 2000. Blue sky refers to albedo calculated under real-world conditions with a combination of both diffuse and direct lighting based on atmospheric and view-geometry conditions.

Body

Daily “blue sky” shortwave albedo data were derived from the MODIS bi-directional reflectance distribution function.

Snowoff Date from 1988-2016

Submitted by ORNL DAAC Staff on 2020-01-06
Image Media
Image Media
Caption

Summary statistics for the snowoff date from 1988-2016 across the study domain: mean (left), standard deviation (middle), and coefficient of variation (right).

Body

Snowoff dates, detected by passive microwave, are available across Alaska, northwestern Canada, and the Russian Far East.

Thaw Slump Expansion in Alaska

Submitted by ORNL DAAC Staff on 2019-12-30
Image Media
Image Media
Caption

Annual expansion of a thaw slump on the East Fork Chandalar River near the community of Venetie, Alaska, from 2008 through 2017. The erosion time series was created by digitizing data from ESRI base maps and Landsat 5, 7, and 8 images. The eroded area appears to be growing steadily, mostly to the east, with apparent limitation on growth to the north and south.

Body

A time series of Landsat-derived maps shows the expansion of a thaw slump in Alaska.

Subsistence Use Areas in Alaska

Submitted by ORNL DAAC Staff on 2019-11-04
Image Media
Image Media
Caption

Combined map of subsistence resource use areas of Interior Alaskan communities with (1) points marking harvest effort locations, (2) polygons indicating harvest effort areas, and (3) lines indicating linear harvesting activity.

Body

Maps of the search and harvest areas used by residents of Interior Alaska are available.