1,600 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...

RLC AVHRR-Derived Land Cover, Former Soviet Union, Far East, 1-km, 1990

T.A. STONE & P. SCHLESINGER

NACP MCI: CO2 Emissions Inventory, Upper Midwest Region, USA., 2007

S.M. OGLE, A.E. SCHUH, T.O. WEST, K.R. GURNEY, L.S. HEATH, J.L. MCCARTY, J.E. SMITH, F.J. BREIDT & D. COOLEY
This data set provides a bottom-up CO2 emissions inventory for the mid-continent region of the United States for the year 2007. The study was undertaken as part of the North American Carbon Program (NACP) Mid-Continent Intensive (MCI) campaign. Emissions for the MCI region were compiled from these resources into nine inventory sources (Table 1):(1) forest biomass and soil carbon, harvested woody products carbon, and agricultural soil carbon from the U.S. Greenhouse Gas (GHG) Inventory (EPA,...

BOREAS TE-09 in situ Understory Spectral Reflectance within the NSA

GEOFFREY EDWARDS, K.P.B. THOMSON & A.P. VIAU
Spectral reflectance of the forest understory at the ground level, in three boreal forest sites of Northern Manitoba (56 degrees N latitude and 98 degrees W longitude), were obtained and analyzed. The objective of the study was to estimate light levels inside the forest canopy and to link these estimates with airborne images taken above the canopy, in order to tie the photosynthetic experiments and models with the remotely sensed measurements. The Boreal Ecosystem-Atmospheric Study...

LBA-ECO ND-30 Fractional Cover of Mixed Land Use Ranches, Para and Rondonia, Brazil

E.A. DAVIDSON, G.P. ASNER, T.A. STONE, C. NEILL & R.D.O. FIGUEIREDO
This data set contains images of fractional cover estimates of photosynthetic vegetation (PV) canopy, nonphotosynthetic vegetation (NPV), and exposed soils (S) derived from Landsat images (30-m resolution) obtained for two ranches in the Brazilian Amazon from 1996 to 2002. The Fazenda Vitoria ranch is located in eastern Para near the city of Paragominas and is a mosaic of primary forest, logged forest, secondary forest, and pasture with moderately dissected topography. The Fazenda Nova Vida ranch...

CARVE: L2 Atmospheric Gas Concentrations, Airborne Flasks, Alaska, 2012-2015

C. SWEENEY, J.B. MILLER, A. KARION, S.J. DINARDO & C.E. MILLER
This data set provides atmospheric carbon dioxide (CO2), methane (CH4), carbon monoxide (CO), molecular hydrogen (H2), nitrous oxide (N2O), sulfur hexafluoride (SF6), and other trace gas mole fractions (i.e. "concentrations") from airborne campaigns over the Alaskan and Canadian Arctic for the Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE). The CARVE flight campaigns took place from 2012 to 2015 between the months of March and November to enable investigation of both seasonal and inter-annual variability in...

LBA-ECO TG-10 Fire Emission Factors in Mato Grosso, Para, and Amazonas, Brazil: 2004

R.J. YOKELSON, T.R. KARL, P.E. ARTAXO, D.R. BLAKE, T.J. CHRISTIAN, D.W.T. GRIFFITH, A.B. GUENTHER & W.M. HAO
This data set provides derived emission factors (EFs), reported in grams of compound emitted per kilogram of dry fuel (g/kg), for PM10 (particulate matter up to 10 micrometers in size), O3, CO2, CO, NO, NO2, HONO, HCN, NH3, OCS, DMS, CH4, and up to 48 non-methane organic compounds (NMOC) from the Tropical Forest and Fire Emissions Experiment (TROFFEE). TROFFEE used laboratory measurements followed by airborne and ground based field campaigns in Mato Grosso, Para, and...

Particulate iodine concentrations and associated ion fractions for ATom-1 and ATom-2

J.L. Jimenez, P. Campuzano-Jost, D.A. Day, B.A. Nault & J.C. Schroder
This dataset consists of aircraft HR-AMS measurements of particulate iodine taken on the NASA ATom 1 and 2 missions

Disturbance History and Forest Biomass from Landsat for Six US Sites, 1985-2014

W.B. Cohen, Z. Yang, S.P. Healey & H.E. Andersen
This dataset provides derived disturbance history and predicted annual forest biomass maps at 30-m resolution for six selected Landsat scenes across the Conterminous United States (CONUS) for the period 1985-2014. The focus sites are in the following states: Colorado, Maine, Minnesota, Oregon, Pennsylvania, and South Carolina. These scenes were selected to represent a wide range of forest ecosystems, which ensured that a diversity of forest type groups and forest change processes (e.g., harvest, fire, insects,...

SAFARI 2000 FPAR TRAC Data for Mongu, Zambia, 1999-2002

J.L. PRIVETTE, M.M. MUKELABAI & K.F. HUEMMRICH
Data from the Tracing Architecture and Radiation of Canopies (TRAC) instrument were processed to determine the fraction of intercepted photosynthetically active radiation (FPAR) at the EOS Validation Core Site in Kataba Local Forest, approximately 20 km south of Mongu, Zambia. Measurements began in 1999 and continued into 2002, with measurements collected about every month. TRAC contains three pyranometers sensitive to PAR wavelengths, with two sensors upward looking and one downward looking. The TRAC instrument was...

ABoVE: Annual Phenology Derived from Landsat across the ABoVE Core Domain, 1984-2014

E.K. Melaas, D. Sulla-Menashe, C.E. Woodcock & M.A. Friedl
This dataset provides annual maps of the timing of spring onset with leaf emergence, of autumn onset with leaf senescence, and of peak greenness for each 30 m pixel derived from Landsat time series of Thematic Mapper (TM) and Enhanced Thematic Mapper (ETM+) observations from 1984 to 2014. The ABoVE core domain includes 169 ABoVE grid tiles across Alaska, USA and Alberta, British Columbia, Northwest Territories, Nunavut, Saskatchewan, and Yukon, Canada. The data provided for...

ABoVE: Passive Microwave-derived Annual Snowoff Date Maps, 1988-2016

C.G. Pan, P.B. Kirchner, J. Du & J.S. Kimball
This dataset provides annual maps of the snowoff (SO) date from 1988-2016 across Alaska and parts of Far East Russia and northwest Canada at a resolution of 6.25 km. SO date is defined as the last day of persistent snow and was derived from the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave (PMW) EASE-Grid Brightness Temperature (Tb) Earth System Data Record (ESDR) product. The spatial domain was intended to match MODIS Alaska Snow Metrics and extend its...

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.

Pre-LBA Smoke, Clouds, and Radiation - Brazil (SCAR-B) Data

V.W.J.H. KIRCHHOFF & C.A. NOBRE

LBA-ECO LC-23 ASTER and MODIS Fire Data Comparison for Brazil: 2003-2004

J.T. MORISETTE, L. GIGLIO, I.A. CSISZAR, A. SETZER, W. SCHROEDER, D.C. MORTON & C.O. JUSTICE
This data set contains data associated with MODIS fire maps generated using two different algorithms and compared against fire maps produced by ASTER. These data relate to a paper (Morisette et al., 2005) that describes the use of high spatial resolution ASTER data to evaluate the characteristics of two fire detection algorithms, both applied to MODIS-Terra data and both operationally producing publicly available fire locations. The two algorithms are NASA's operational Earth Observing System MODIS...

A Global Database of Gas Fluxes from Soils after Rewetting or Thawing, Version 1.0

D.-G. KIM, R. VARGAS, B.P. BOND-LAMBERTY & M. R. TURETSKY
This database contains information compiled from published studies on gas flux from soil following rewetting or thawing. The resulting database includes 222 field and laboratory observations focused on rewetting of dry soils, and 116 field laboratory observations focused on thawing of frozen soils studies conducted from 1956 to 2010. Fluxes of carbon dioxide, methane, nitrous oxide, nitrogen oxide, and ammonia (CO2, CH4, N2O, NO and NH3) were compiled from the literature and the flux rates...

LBA-ECO LC-15 Aerodynamic Roughness Maps of Vegetation Canopies, Amazon Basin: 2000

E. RODRIGUEZ, S. DENNING, R. DUBAYAH & S. SAATCHI
This data set provides physical roughness maps of vegetation canopies in the Amazon Basin. The images are estimates of aerodynamic roughness length (Z0) and zero plane displacement height (D0) at 1-km spatial resolution. The aerodynamic roughness length (Z0) is an important parameter to determine the vertical gradients of mean wind speed and the conditions for momentum transfer over a vegetated or bare rough surface. The maps were produced from a multivariate regression model algorithm developed...

Global Leaf Area Index from Field Measurements, 1932-2000

J.M.O. SCURLOCK, G.P. ASNER & S.T. GOWER
Approximately 1000 published estimates of leaf area index (LAI) from nearly 400 unique field sites, covering the period 1932-2000, have been compiled into a single data set. LAI is a key parameter for global and regional models of biosphere/atmosphere exchange of carbon dioxide, water vapor, etc. This data set provides a benchmark of typical values and ranges of LAI for a variety of biomes and land cover types, in support of model development and validation...

NACP Soil Organic Matter of Burned Boreal Black Spruce Forests, Alaska, 2009-2011

E.E. HOY, M.R. TURETSKY & E.S. KASISCHKE
This data set provides organic soil layer characteristics, estimated carbon content, and soil depth measurements made at four black spruce stands in interior Alaska that had burned twice in the last 37-52 years (intermediate-interval fire events). The most recent fires occurred in 2004, 2005, and 2010. Measurements of soil depth and distance from the adventitious roots to the soil, and total organic matter are also included for unburned black spruce sites adjacent to the burned...

BOREAS TF-01 SSA-OA Soil Characteristics Data

T.A. BLACK
The BOREAS TF-01 team collected several data sets in support of its efforts to characterize and interpret soil information at the SSA-OA tower site in 1994 as part of BOREAS. Data sets collected include soil respiration, temperature, moisture, and gravimetric data.

SNF NS001-TMS Canopy Reflectance 1983-84

F.G. HALL, K.F. HUEMMRICH, D.E. STREBEL, S.J. GOETZ, J.E. NICKESON & K.D. WOODS
The NS001 Thematic Mapper Simulator (TMS) was flown on the NASA C-130 aircraft over the Superior National Forest study area. TMS data were collected and processed for three days: July 13 and August 6, 1983; and June 28, 1984. The TMS was a scanning radiometer with eight wavelength bands. Band 8 was a thermal band and not processed in this study. The C-130 flew a "crisscross" pattern over the SNF, which provided a variety of...

LBA-ECO TG-07 Soil CO2 Flux by Automated Chamber, Para, Brazil: 2001-2003

R.K. VARNER & M.M. KELLER
The net ecosystem exchange of carbon dioxide was measured by eddy covariance methods for 3 years in two old-growth forest sites near Santarem, Brazil. Carbon was lost in the wet season and gained in the dry season, which was opposite to the seasonal cycles of both tree growth and model predictions. The 3-year average carbon loss was 1.3 (confidence interval: 0.0 to 2.0) megagrams of carbon per hectare per year. Biometric observations confirmed the net...

Global 10-Year Mean Monthly Climatology, 1901-1990 (New et al.)

M. NEW, M. HULME & P.D. JONES
This is a data set of 10-year mean monthly surface climate data over global land areas, excluding Antarctica, for the period 1901-1990. The data set is gridded at 0.5 degree latitude/longitude resolution and includes seven variables: precipitation, mean temperature, diurnal temperature range, wet-day frequency, vapour pressure, cloud cover, and ground-frost frequency. In constructing the monthly grids the authors used an anomaly approach which attempts to maximize station data in space and time (New et al.,...

ISLSCP II Gauge-Based Analyses of Daily Precipitation over Global Land Areas

P.-P. XIE & J.E. JANOWIAK
The objective of this work was to construct a long-term data set of daily precipitation on half degree and one degree latitude/longitude grids over the global land areas. The analyses are defined by interpolating station observations from GTS (Global Telecommunications System) gauges using the algorithm of Shepard (1968). The algorithm of Shepard (1968) has been widely used to interpolate gauge observations of monthly, pentad, and daily precipitation (Rudolf 1993, Xie et al. 1996). This algorithm...

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