DAAC Home > Resources > News

News

Forest Carbon as a Function of Last Disturbance for Conterminous USA

Submitted by ORNL DAAC Staff on 2021-06-21
Image Media
Image Media
Caption

Estimated total ecosystem carbon for the northeast region of the U.S. for the years 1990 (left) and 2010 (right). The estimates were produced from an inventory-constrained version of the Carnegie-Ames-Stanford Approach (CASA) carbon cycle process model.

Body
This dataset provides estimates of forest carbon stocks and fluxes as a function of the number of years since the most recent disturbance for decadal benchmark years.
Tags

Multispectral Imagery, NDVI, and Terrain Models, north of Fairbanks, AK, 2019

Submitted by ORNL DAAC Staff on 2021-06-13
Image Media
Image Media
Caption

Color infrared image of Big Trail Lake in the Goldstream Creek Valley north of Fairbanks, Alaska. Ground control points (yellow triangles) surround the lake. Image was produced from NIR (red), red (green), and green (blue).

Body
Very high resolution multispectral reflectance imagery, normalized difference vegetation index (NDVI), and digital surface and terrain models for a 0.5 km2 area surrounding Big Trail Lake (BTL) with soil collar locations for measuring carbon flux.

SiB4 Global Terrestrial Carbon Cycle Modeled Outputs for 3 Time Steps

Submitted by ORNL DAAC Staff on 2021-06-13
Image Media
Image Media
Caption

Overview of the Simple Biosphere Model (SiB4) that estimates carbon fluxes among the atmosphere, vegetation, and soils. Input information is shown in yellow boxes. These datasets include a selection of the output variables (blue boxes). Source: Haynes et al. (2020)

Body
Global terrestrial model outputs predicted by the Simple Biosphere Model, Version 4.2 (SiB4), at a 0.5-degree spatial resolution, 2000-2018.
Tags

ABoVE: Frozen Lake Aerial Photographs Identify CH4 Seeps

Submitted by ORNL DAAC Staff on 2021-06-13
Image Media
Image Media
Caption

Location of the study area northwest of Fairbanks, AK, USA. The map shows (a) yedoma permafrost distribution and (b) yedoma lakes and terrain of the Goldstream Valley. Data sources include Strauss et al. (2016), Alaska LiDAR Dataset (USGS, 2018), Elevation Datasets of Alaska (DGGS Staff, 2013), and Walter Anthony et al. (2020).

Body
Orthophotographs of lakes near of Fairbanks, AK, identify open holes in lake ice that indicate the location of releases of CH4 from thawing permafrost.

Methane Ebullition Hotspot Locations in Frozen Lakes near Fairbanks, Alaska

Submitted by ORNL DAAC Staff on 2021-06-06
Image Media
Image Media
Caption

Location of 15 lakes surveyed for methane ebullition hotspots (green points) north of Fairbanks, AK, on October 8, 2014. Inset shows detail of Eagle Lake with locations of 43 hotspots (red points) detected by openings in lake ice.

Body
Locations and number of methane ebullition hotspots in frozen lakes in the southern portion of the Goldstream Valley and surroundings near Fairbanks, Alaska.

Methane Emissions from Dairy Sources in California

Submitted by ORNL DAAC Staff on 2021-06-06
Image Media
Image Media
Caption

Total annual methane emissions in 2019 from dairy farms in California. These values represent the sum of emissions from enteric fermentation and manure management practices. Units are Gg per square kilometer per year. Source: total_CH4_CA_2019.tif

Body
Estimates of methane (CH4) emissions from dairy farms in California for 2019.