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

Submitted by ORNL DAAC Staff on 2021-06-13
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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).

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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
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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)

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Global terrestrial model outputs predicted by the Simple Biosphere Model, Version 4.2 (SiB4), at a 0.5-degree spatial resolution, 2000-2018.
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ABoVE: Frozen Lake Aerial Photographs Identify CH4 Seeps

Submitted by ORNL DAAC Staff on 2021-06-13
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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).

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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
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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.

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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
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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

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

Annual Aboveground Biomass for Boreal Forests of ABoVE Core Domain, 1984-2014

Submitted by ORNL DAAC Staff on 2021-06-06
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Spatial distribution of predicted aboveground biomass (AGB) density averaged over 1984-2014 for the ABoVE Core Study Domain. Ecoregions represent the EPA Level 2 Ecoregion boundaries. Source: Wang et al. (2021)

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Estimated annual AGB density for live woody species in the ABoVE Core Study Domain from 1984-2014.

Version 5 of the Global Soil Respiration Database

Submitted by ORNL DAAC Staff on 2021-06-06
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Locations of SRDB V5 observations combining pre-existing observations from V4 and new observations from Russian and Chinese literature, and literature from other languages (primarily English). Circle size represents sample size at each location. 

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This new version of the Global Soil Respiration Database (SRDB) is a near-universal compendium of published soil respiration (Rs) data.
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