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Seasonality and Peak Greenness in the Arctic

Map of peak greenness.

Peak greenness derived from the Normalized Difference Vegetation Index (NDVI) for the year 2010 in the ABoVE grid cell Bh07v07.

Maps of annual seasonality and greenness are now available from the Arctic-Boreal Vulnerability Experiment.

Snowoff Date from 1988-2016

Maps showing snowoff date statistics.

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

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

Predicted Annual Soil Respiration from the Carbon Monitoring System

Global map of annual soil respiration.

A global map of predicted annual soil respiration (Rs) at 1 km spatial resolution created by applying the QRF model to gridded covariates. Right is a plot of the latitudinal mean predicted annual Rs.

A machine learning approach was used to derive the predicted annual soil respiration and uncertainty at a 1 km spatial resolution.

Atmospheric Concentrations of Halocarbons and Hydrocarbons

Map showing CFC-11 mixing ratio

Mixing ratio of CFC-11 measured by Whole Air Sampler (WAS) during ATom-4 flights in April-May 2018.

The UC-Irvine Whole Air Sampler (WAS) instrument was used during the Atmospheric Tomography (ATom) mission.

Amazonia Forest Canopy Structure from LiDAR

Map of Para, Brazil.

Bounding boxes for LiDAR tiles from surveys over western Para, Brazil, are depicted in Google Earth from the KMZ companion file. Each feature in the KMZ provides key metadata about the corresponding tile.

LiDAR surveys over forest research sites across the Amazon rainforest in Brazil are available.

Volatile Organic Compound Concentrations

Global map showing measurements by TOGA.

Measurements of atmospheric acetone concentration from samples collected by the Trace Organic Gas Analyzer (TOGA) during ATom-3 flights in 2017.

Concentrations of volatile organic compounds (VOCs), measured by the Trace Organic Gas Analyzer (TOGA), are available.

Carbon Fluxes From US Coastal Wetlands

Estimated CO2e fluxes and confidence interval ranges for the Mississippi River outlet in Louisiana, United States. This area contains palustrine and estuarine wetlands, and includes stable wetlands, wetland gains and loss events from 2006 to 2011. A: Total flux from 2006 to 2011. B. Uncertainty, as represented by confidence interval range (0.975 - 0.025 quantile distributions of the results of the Monte Carlo Analysis). C-E. The relative contributions of soil, biomass, and methane to the total flux (A).

A new dataset provides maps of surface elevation, land cover, biomass, and estimated coastal wetland carbon fluxes.

Atmospheric Chemistry from the ATom Campaign

Map showing atmospheric CO2 measurements.

Measurements of atmospheric carbon dioxide concentration from flasks collected by the Medusa system during ATom-4 flights in 2018.

NASA's Atmospheric Tomography (ATom) campaign collected whole air samples and measurements of formaldehyde during round-the-world flights.

Mapping Methane Emissions Across California

Map of California's methane emissions.

Vista-CA provides locations of methane (CH4) emitting facilities and infrastructure in the State of California. In this figure, the distribution of digesters, feed lots, and dairies across the San Francisco Bay Area and Central Valley are shown.

The Vista-CA dataset provides locations of potential methane (CH4) emitting facilities and infrastructure across the state of California.

Thaw Slump Expansion in Alaska

Map showing thaw slump in Alaska.

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.

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