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THREDDS NetCDF Subsetting Service Bug Fixed

Submitted by ORNL DAAC Staff on 2020-06-24
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Unidata's THREDDS Data Server (TDS) is a web server that provides metadata and data access for scientific datasets, using a variety of remote data access protocols.

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A bug has been fixed in the THREDDS Data Server (TDS) NetCDF Subsetting Service (NCSS) that may, in rare cases, have returned incorrect results.

Remote Sensing and Invasive Species

Submitted by ORNL DAAC Staff on 2020-05-26
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Searching for the term remote sensing and words related to invasive species (invasive, nonnative, exotic, or nonindigenous) in Google Scholar reveals an increasing number of publications each year using these terms.

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A new Earthdata article describes how researchers are using remote sensing to map invasive species.

Surveying the Ecological Effects of Fire on Alaska's Yukon-Kuskokwim Delta

Submitted by ORNL DAAC Staff on 2020-05-18
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Vegetation point-intercept (VPI) any-hit cover metric data were combined with Landsat imagery to develop fractional maps of any-hit cover for four aggregated plant functional types (PFTs);  shrubs bryophytes, lichen, and herbs for the upland tundra area of the Y-K Delta, Alaska. VPI data were collected from plots in areas burned in 1971, 1985, 2005, and 2015.

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Ecological field data and maps of vegetation cover spanning gradients of fire history in upland tundra are available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

ATom Compiles Flask Data from 2009 to 2018

Submitted by ORNL DAAC Staff on 2020-05-18
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Horizontal (left) and vertical (right) distribution of airborne flask sample locations identified as being of stratospheric origin. Thin dashed black lines on the map illustrate the flight tracks of all 9 campaigns of the 3 airborne projects. Symbols indicate the campaigns during which the stratospheric samples were collected, and colors show the potential temperature at which the sample was taken.

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A new dataset from the Atmospheric Tomography Mission compiles measurements of mean age of air.

WAVeTrends: Trends in Woody and Herbaceous Vegetation

Submitted by ORNL DAAC Staff on 2020-05-18
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Concurrent woody and herbaceous vegetation changes between the 1982-1991 and 2004-2013 decades of the Sudano-Sahel region of Africa. (A) Map of vegetation change categories. (B) Chart showing the conceptual position and the relative abundance of each category in a 2-D space.

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Vegetation change data spanning the West African Sudano-Sahel region is now available.

Boreal Forest Biomass and Soil Metrics at Burned Sites

Submitted by ORNL DAAC Staff on 2020-05-18
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Field sites, ecoregions, and total area burned (millions of hectares; Mha) in each of the ecoregions in the study domain over time. Grey dotted line in the inset represents the simple linear regression, with red shading for the 95% confidence intervals, of burned area for all ecoregions combined. Analyses were completed using the field site groupings, located within the six ecoregions defined by the EPA Level II Ecoregions of North America.

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Burned forest plot data is available from the Arctic-Boreal Vulnerability Experiment (ABoVE).