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Recent NASA Article Highlights Daymet

Submitted by ORNL DAAC Staff on 2020-05-13
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Each black dot on this digital elevation map (DEM) represents a surface weather station in continental North America providing Daymet data in 2010. Additional stations providing Daymet data are located in Puerto Rico and Hawaii.

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Daymet derived annual average of daily minimum temperature, 1980 (left) and 2019 (right), for a subset of North America. Images are scaled from -20 to +20 degrees C.

Active Layer Thickness across Alaska

Submitted by ORNL DAAC Staff on 2020-05-12
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Model-simulated 1 km mean active layer thickness (ALT) map from 2001 to 2015. Black dots are locations of circumpolar active layer monitoring (CALM) sites used for comparison of observed ALT to modeled ALT. CALM data are not provided. The areas with ALT greater than 300 cm depth are shown in dark gray.

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MODIS and SMAP satellite data were used to derive estimates of active layer thickness and uncertainty.

Topsoil & Agricultural Economic Losses

Submitted by ORNL DAAC Staff on 2020-05-11
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Study area in the Midwestern US with study site locations and extent of analysis. The study area was limited to the spatial extent of LiDAR topographic data (gray hillshade). Squares represent the 28 sites, a total of 210 km2, that were selected for having plowed, bare soil.

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A soil organic carbon index and remote sensing data were used to estimate erosion in Midwestern USA.

New Instrument Data From ATom

Submitted by ORNL DAAC Staff on 2020-04-06
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The UCATS system is three different instruments in one enclosure: a two-channel chromatograph with electron capture detectors (one measures N2O and SF6, the other measures CH4, H2 and CO), a tunable diode laser instrument for H2O, and a dual-beam O3 photometer.

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A new dataset was collected using the Unmanned Aircraft Systems (UAS) Chromatograph for Atmospheric Trace Species (UCATS).

Soil Organic Carbon Estimates for Mexico

Submitted by ORNL DAAC Staff on 2020-03-30
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(A) Digital map of soil organic carbon (kg/m2) at 1 m depth and 90 m spatial resolution. The black and blue colored areas are urban areas and water bodies. (B) An area in northern Mexico illustrating the level of detail achieved by mapping across 90 m grids.

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Estimates of soil organic carbon are now available from Mexico at a 90 meter resolution.