42 Works

Pre-ABoVE: Remotely Sensed Active Layer Thickness, Prudhoe Bay, Alaska, 1992-2000

L. LIU, K. SCHAEFER, T. SCHAEFER, A. CHEN, A. GUSMEROLI, A. PARSEKIAN, S. PANDA, H.A. ZEBKER & T. ZHANG
Active layer thickness (ALT) is a critical parameter for monitoring the status of permafrost that is typically measured at specific locations using probing, in situ temperature sensors, or other ground-based observations. The thickness of the active layer is the average annual thaw depth, in permafrost areas, due to solar heating of the surface. This data set includes the mean Remotely Sensed Active Layer Thickness (ReSALT) over years 1992 to 2000 for an area near Prudhoe...

MODIS Collection 5 Land Product Subsets Web Service

N/A
The MODIS subsets Web service provides data access capabilities for Moderate Resolution Imaging Spectroradiometer (MODIS) Collection 5 subsets through standards based SOAP (Simple Object Access Protocol) Web service. Through the Web service users can obtain data access functions to execute on their local computing resources. The MODIS Web service is built on ORNL DAAC's MODIS Global subsetting and visualization tool that provides customized subsets and visualization of MODIS land products for any land location on...

MODIS NDVI Data, Smoothed and Gap-filled, for the Conterminous US: 2000-2015

J.P. SPRUCE, G.E. GASSER & W.W. HARGROVE
This data set provides Moderate Resolution Imaging Spectroradiometer (MODIS) normalized difference vegetation index (NDVI) data, smoothed and gap-filled, for the conterminous US for the period 2000-01-01 through 2015-12-31. The data were generated using the NASA Stennis Time Series Product Tool (TSPT) to generate NDVI data streams from the Terra satellite (MODIS MOD13Q1 product) and Aqua satellite (MODIS MYD13Q1 product) instruments. TSPT produces NDVI data that are less affected by clouds and bad pixels.

NACP LiDAR-based Biomass Estimates, Boreal Forest Biome, North America, 2005-2006

H. MARGOLIS, G. SUN, P.M. MONTESANO & R.F. NELSON
This data set provides estimates of aboveground biomass (AGB) for defined land cover types within World Wildlife Fund (WWF) ecoregions across the boreal biome of Alaska and western and eastern Canada, roughly between 45 and 70 degrees N. The study focused on within-growing-season data, i.e. leaf-on conditions. The AGB estimates were derived from a series of models that first related ground-based measured biomass to Portable Airborne Laser System (PALS) LiDAR measurements, and a second set...

JERS-1 Synthetic Aperture Radar, 100-m Mosaics, South America: 1995-1996, R1

A. WONG, B. CHAPMAN & A. ROSENQVIST
This data set provides ~100-m resolution image mosaics of South America acquired during the low flood season between September and December 1995 and during the high flood season between May and July of 1996. The images cover the same areas during both seasons and were obtained from the Japanese Earth Resources Satellite 1 (JERS-1) Synthetic Aperture Radar (SAR) of the National Space Development Agency of Japan (NASDA). The data were "mosaicked" into 34 tiles for...

LBA-ECO LC-07 Validation Overflight for Amazon Mosaics, Raster, 1999

E.M.L.M. NOVO, C.C.F. BARBOSA, M. GASTIL-BUHL, L.L. HESS & J.M. MELACK
This data set includes high-resolution geocoded mosaics derived from the Validation Overflight for Amazon Mosaics (VOAM) aerial video surveys as part of the Large-Scale Biosphere-Atmosphere (LBA) Experiment in the Amazon. The VOAM flights were carried out in the wet-season (June) 1999 in the Brazilian Amazon to provide ground verification for mapping of wetland cover in the Amazon Basin conducted by the Global Rain Forest Mapping (GRFM) Project JERS-1 (Japanese Earth Remote Sensing Satellite). Digital camcorder...

Global Fire Emissions Database, Version 4.1 (GFEDv4)

J.T. RANDERSON, G.R. VAN DER WERF, L. GIGLIO, G.J. COLLATZ & P.S. KASIBHATLA
This dataset provides global estimates of monthly burned area, monthly emissions and fractional contributions of different fire types, daily or 3-hourly fields to scale the monthly emissions to higher temporal resolutions, and data for monthly biosphere fluxes. The data are at 0.25-degree latitude by 0.25-degree longitude spatial resolution and are available from June 1995 through 2016, depending on the dataset. Emissions data are available for carbon (C), dry matter (DM), carbon dioxide (CO2), carbon monoxide...

Pre-ABoVE: Ground-penetrating Radar Measurements of ALT on the Alaska North Slope

A. CHEN, A. PARSEKIAN, K. SCHAEFER, E. JAFAROV, S.K. PANDA, L. LIU, T. ZHANG & H.A. ZEBKER
This data set includes estimates of permafrost Active Layer Thickness (ALT; cm), and calculated uncertainties, derived using a ground-penetrating radar (GPR) system in the field in August 2014 near Toolik Lake and Happy Valley on the North Slope of Alaska. GPR measurements were taken along 10 transects of varying length (approx. 1 to 7 km). Traditional ALT estimates from mechanical probing every 100 to 500 m along each transect are also included. These data are...

CMS: DARTE Annual On-road CO2 Emissions on a 1-km Grid, Conterminous USA, 1980-2012

L.R. HUTYRA, C. GATELY & I.S. WING
This data set provides a 33-year, 1-km resolution inventory of annual on-road CO2 emissions for the conterminous United States based on roadway-level vehicle traffic data and state-specific emissions factors for multiple vehicle types on urban and rural roads as compiled in the Database of Road Transportation Emissions (DARTE). CO2 emissions from the on-road transportation sector are provided annually for 1980-2012 as a continuous surface at a spatial resolution of 1 km.

Chemical and hydrographic profile measurements during the West Coast Ocean Acidification Cruise WCOA2013 (August 3-29, 2013)

R.A. Feely, S.R. Alin, B. Hales, G.C. Johnson, R.H. Byrne, W.T. Peterson, X. Liu & D. Greeley

LBA-ECO LC-07 JERS-1 SAR Flooded Wetlands and Vegetation, Amazon Basin: 1995-1996

L.L HESS, J.M. MELACK, E.M.L.M. NOVO, C.C.F. BARBOSA & M. GASTIL
This data set provides a map of wetland extent, vegetation type, and dual-season flooding state of the entire lowland Amazon basin. The map was derived from mosaics of Japanese Earth Resources Satellite (JERS-1) Synthetic Aperture Radar (SAR) imagery for the period October-November 1995 and May-July 1996. The images are from the original JERS-1 SAR Global Rain Forest Mapping Project (GRFM) (Rosenqvist et al., 2000). Hess et al. (2003; 2012) mapped and validated wetland extent, vegetative...

Location and Permanency of Water Bodies in the African Sahel Region from 2003-2011

A.T. KAPTUE, N.P. HANAN & L. PRIHODKO
This data set provides an estimate of the spatial and temporal extent of surface water at 250-m resolution over nine years (2003-2011) for the African Sahel region (10-20 degrees N) using imagery from the Moderate-resolution Imaging Spectroradiometer (MODIS). Water bodies were identified by a spectral analysis of MODIS vegetation indices with the aim to improve existing regional to global mapping products. This data set can be used to enhance the understanding of Earth system processes,...

CARVE: Alaskan Fire Emissions Database (AKFED), 2001-2013

S. VERAVERBEKE, B.M. ROGERS & J.T. RANDERSON
This data set provides estimates of annual carbon emissions (kg carbon per square meter) from boreal fires at 450-m resolution for the state of Alaska between 2001 and 2013. To produce these data, daily burned area for 2001 to 2013 was mapped using imagery from the Moderate Resolution Imaging Spectroradiometer (MODIS) combined with perimeters from the Alaska Large Fire Database. Carbon consumption was calibrated using available field measurements from black spruce forests in Alaska. Above-...

CMS: Soil CO2 Efflux and Properties, Site Vegetation Measurements, Mexico, 2011-2012

R. VARGAS & E. LEON
This data set provides the results of (1) monthly measurements of soil CO2 efflux, volumetric water content, and temperature, and (2) seasonal measurements of soil (porosity, bulk density, nitrogen (N) and carbon (C) content) and vegetation (leaf area index (LAI), litter and fine root biomass) properties in a water-limited ecosystem in Baja California, Mexico. Measurements and samples were collected from August 2011 to August 2012.

Spatio-temporal Characteristics of Rainfall in Africa, 0.25 degrees, from 1998-2012

A.T. KAPTUE
This data set describes rainfall distribution statistics over the African continent, including Madagascar. The rainfall estimates are based on data from the NASA Tropical Rainfall Measuring Mission (TRMM) measured between 1998 and 2012. Rainfall patterns were quantified using a gamma-based function and two Markov chain parameters with the aim to summarize the rainfall pattern to a small number of parameters and processes. These summary statistics are suitable for temporal downscaling. These data provide gridded (0.25...

MODIS Collection 5 Global Subsetting and Visualization Tool

N/A
The MODIS global subsetting and visualization tool provides customized subsets and visualizations of 13 MODIS Collection 5 land products on demand for any land area on Earth, from 1 pixel up to 201 x 201 km. Subset products are made available to the user through an interactive web page. On this page are time series plots, QC information, land cover and phenology, citation, and data download. Users specify a location for the center point of...

Global Ocean Surace Water Partial Pressure of CO2 Database: Measurements Performed During 1957-2014 (Version 2014)

T. Takahashi, S. Sutherland & A. Kozyr

LBA-ECO LC-14 Root Biomass and Phenology, km 67 Site, Para, Brazil: 2001

D.C. NEPSTAD & P.R. MOUTINHO
This data set contains biomass estimates for coarse roots measured on the forest floor and measurements of fine root growth down to 2-m depth at the km 67 Rainfall Exclusion Experiment site, Tapajos National Forest, Brazil. The study site was part of a rainfall exclusion experiment that was conducted from 1999-2006 to develop an understanding of the physical processes driving the observed soil water dynamics at the site. All surface roots intersected along three 1000-m...

Carbon Dioxide, Hydrographic, and Chemical Data Obtained During the R/V Ronald H. Brown Cruise in the Atlantic Ocean on GO-SHIP/CLIVAR Repeat Hydrography Section A16S (Dec. 23 - Feb. 04, 2014)

Oak Ridge National Laboratory Environmental Sciences Division

CMS: GLAS LiDAR-derived Global Estimates of Forest Canopy Height, 2004-2008

S.P. HEALEY, M.W. HERNANDEZ, D.P. EDWARDS, M.A. LEFSKY, J.E. FREEMAN, P.L. PATTERSON, E.J. LINDQUIST & A.J. LISTER
This data set provides estimates of forest canopy height derived from the Geoscience Laser Altimeter System (GLAS) LiDAR instrument that was aboard the NASA Ice, Cloud, and land Elevation (ICESat) satellite. A global GLAS waveform data set (n=12,336,553) from collection periods between October 2004 and March 2008 was processed to obtain canopy height estimates. Estimates of GLAS maximum canopy height and crown-area-weighted Lorey's height are provided for 18,578 statistically-selected globally distributed forested sites in a...

Long-Term Arctic Growing Season NDVI Trends from GIMMS 3g, 1982-2012

K.C. GUAY, P.S.A. BECK & S.J. GOETZ
This data set provides normalized difference vegetation index (NDVI) data for the arctic growing season derived primarily with data from Advanced Very High Resolution Radiometer (AVHRR) sensors onboard several NOAA satellites over the years 1982 through 2012. The NDVI data, which show vegetation activity, were averaged annually for the arctic growing season (GS; June, July and August). The products include the annual GS-NDVI values and the results of a cumulative GS-NDVI time series trends analysis....

NACP NAFD Project: Forest Disturbance History from Landsat, 1986-2010

S.N. GOWARD, C. HUANG, F. ZHAO, K. SCHLEEWEIS, K. RISHMAWI, M. LINDSEY, J.L. DUNGAN & A.R. MICHAELIS
The North American Forest Dynamics (NAFD) products provided in this data set consist of 25 annual and two time-integrated forest disturbance maps for the conterminous United States (CONUS) derived from Landsat images for the period 1986-2010. Each annual map has classified pixels showing water, no forest cover, forest cover, no data available (data gaps) in present year, and forest disturbances that occurred in that year. The time-integrated maps are similarly classified, but over the entire...

Daymet: Annual Climate Summaries on a 1-km Grid for North America, Version 2

P.E. THORNTON, M.M. THORNTON, B.W. MAYER, N. WILHELMI, Y. WEI, R. DEVARAKONDA & R.B. COOK
This data set provides annual summary climate data at 1-km x 1-km spatial resolution for four Daymet variables; minimum and maximum temperature, precipitation, and vapor pressure. These single year summary data products are produced for each individual year and covers the period of record from 1980 to 2014. The annual climatological summaries are derived from the much larger data set of daily weather parameters (Thornton et al., 2014), produced on a 1-km x 1-km grid...

NACP TERRA-PNW: Forest Plant Traits, NPP, Biomass, and Soil Properties, 1999-2014

B.E. LAW & L.T. BERNER
This data set contains measurements and estimates of leaf, tree, and soil data from six projects conducted by the Terrestrial Ecosystem Research and Regional Analysis- Pacific Northwest (TERRA-PNW) research group between 1999 and 2014 across forests in Oregon and Northern California. Included are standardized, integrated measurements and estimates of specific leaf area, leaf longevity, leaf carbon and nitrogen for 35 tree and shrub species derived from more than 1,200 branch samples collected from over 200...

Russian Boreal Forest Disturbance Maps Derived from Landsat Imagery, 1984-2000

D. CHEN, T.V. LOBODA, S. CHANNAN & A. HOFFMAN-HALL
This data set provides Boreal forest disturbance maps at 30-m resolution for 55 selected sites across Northern Eurasia within the Russian Federation. Disturbance events were derived from selected high-quality multi-year time series of Landsat Thematic Mapper and Enhanced Thematic Mapper Plus images (stacks) over the 1984 to 2000 time period. Forest pixels were classified by year of latest disturbance or as undisturbed.

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