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Active Layer Thickness across Alaska

Map of active layer thickness in Alaska.

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.

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

Soluble Acidic Gases and Aerosols (SAGA) Instrument Data

Instrument: Soluble Acidic Gases and Aerosols (SAGA).

The SAGA installation onboard the DC-8 - AFRC aircraft.

Soluble ion measurements are available from the Atmospheric Tomography Mission (ATom).

Pinyon-Juniper Forest Aboveground Biomass

Map of live aboveground tree biomass for a portion of the Great Basin, USA.

Map of annual live aboveground tree biomass (Mg/ha) for pinyon-juniper forests across a representative portion of the Great Basin of the Western USA for the year 2005 at a spatial resolution of 30 meters.

Maps of live tree biomass in pinyon-juniper forests are available for the years 2000-2016.

Harmonized Global Land Use and Land Cover

Map of land use transition in South America.

The area fraction that has transitioned from C3 annual crops in 2015 to secondary vegetation in 2016 on LUH2 potential forest land. Spatial resolution 0.25-degree grid cells.

Annual estimates of fractional land use and cover patterns are available for the period 2015 to 2100.

Improved Global Subsets Tool for MODIS/VIIRS Land Products

Screenshot fo the Global Subsets Tool.

The MODIS/VIIRS Global Subsetting and Visualization Tool streamlines the use of MODIS and VIIRS land product data.

Responsive design with multiple products and site ordering features now available in Global Subsets Tool for MODIS/VIIRS Land Products.

Atmospheric Concentrations from the QCLS Instruments

Image of the the Harvard QCLS Instrument

The Harvard QCLS (DUAL and CO2) instrument package contains 2 separate optical assemblies and calibration systems, and a common data system and power supply.

The Harvard Quantum Cascade Laser System (QCLS) instrument data is now available from the Atmospheric Tomography Mission (ATom).

New Instrument Data From ATom

Image of the UCATS system.

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.

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

Feedback on Learning Resources!

Screenshot of the Learning Resources page.

The ORNL DAAC provides a variety of resources for creating, submitting, and using data products and services.

The ORNL DAAC welcomes your feedback on existing learning resources and suggestions for new ones.

Daymet 2019 Data Now Available

Map of Daymet Single Pixel Download Locations

The Single Pixel Extraction Tool allows a user to obtain daily Daymet data in a tabular format for a single geographic point (pixel) specified by latitude and longitude.

Daymet gridded estimates of daily weather parameters are now available for the years 1980 to 2019.

Soil Organic Carbon Estimates for Mexico

Map of Mexico's soil organic carbon.

(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.

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

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