93 Works

ABoVE: Characterization of Burned and Unburned Boreal Forest Stands, SK, Canada, 2016

C. Dieleman, B.M. Rogers, S. Veraverbeke, J.F. Johnstone, J. Laflamme, L. Gelhorn, K. Solvik, X.J. Walker, M.C. Mack & M.R. Turetsky
This dataset provides the results of field measurements and estimates of carbon stocks and combustion rates that characterize burned and unburned southern boreal forest stands near the La Ronge and Weyakwin communities in central Saskatchewan (SK), Canada. Measurements were completed in 2016 at 47 stands that burned in the 2015 Saskatchewan wildfires (Egg, Philion, and Brady) and at 32 unburned stands in comparable adjacent areas. Stands were characterized through field observations and sampling of the...

Global Aboveground and Belowground Biomass Carbon Density Maps for the Year 2010

S.A. Spawn & H.K. Gibbs
This dataset provides temporally consistent and harmonized global maps of aboveground and belowground biomass carbon density for the year 2010 at a 300-meter spatial resolution. The aboveground biomass map integrates land-cover specific, remotely sensed maps of woody, grassland, cropland and tundra biomass. Input maps were amassed from the published literature and, where necessary, updated to cover the focal extent or time period. The belowground biomass map similarly integrates matching maps derived from each aboveground biomass...

ABoVE: Atmospheric Gas Concentrations from Airborne Flasks, Arctic-CAP, 2017

C. Sweeney, K. McKain, B.R. Miller & S.E. Michel
This dataset 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 flights over Alaska and the Yukon and Northwest Territories of Canada during the Arctic Carbon Aircraft Profile (Arctic-CAP) monthly sampling campaigns from April-November 2017. The data were derived from laboratory measurements of whole air samples collected by Programmable Flask Packages (PFP) onboard the aircraft. During...

ATom: In Situ Tropical Aerosol Properties and Comparable Global Model Outputs

C.J. Williamson, A. Kupc, K.R. Bilsback, T.P. Bui, P.C. Jost, M. Dollner, K.D. Froyd, A.L. Hodshire, J.L. Jimenez, J.K. Kodros, G. Luo, D.M. Murphy, B.A. Nault, E. Ray, B. Weinzierl, F. Yu, P. Yu, J.R. Pierce & C.A. Brock
This dataset provides (1) the results of in situ aerosol particle property measurements collected over remote tropical areas of both Pacific and Atlantic Oceans during the NASA airborne Atmospheric Tomography (ATom) campaigns for ATom-1 and ATom-2 and (2) modeled outputs of comparable aerosol properties, atmospheric chemistry and meteorology at 70 m resolution from four chemical-transport models matched to the location and time of the aircraft measurements.

ABoVE: Landsat-derived Annual Dominant Land Cover Across ABoVE Core Domain, 1984-2014

J.A. WANG, D. SULLA-MENASHE, C.E. WOODCOCK, O. SONNENTAG, R.F. KEELING & M.A. FRIEDL
This dataset provides two 30-m resolution time series products of annual land cover classifications over the Arctic Boreal Vulnerability Experiment (ABoVE) core domain for each year of the period 1984-2014. The data are the annual dominant plant functional type in a given 30-meter pixel derived from time series of Landsat surface reflectance, landcover training data mapped across the ABoVE domain using Random Forests modeling, with clustering and interpretation of field photography and very high resolution...

Coastal Wetland Elevation and Carbon Flux Inventory with Uncertainty, USA, 2006-2011

J.R. Holmquist, L. Windham-Myers, B. Bernal, K.B. Byrd, S. Crooks, M.E. Gonneea, N. Herold, S.H. Knox, K. Kroeger, J. Mccombs, P.J. Megonigal, L. Meng, J.T. Morris, A.E. Sutton-grier, T. Troxler & D. Weller
This dataset provides maps of coastal wetland carbon and methane fluxes and coastal wetland surface elevation from 2006 to 2011 at 30 m resolution for coastal wetlands of the conterminous United States. Total coastal wetland carbon flux per year per pixel was calculated by combining maps of wetland type and change with soil, biomass, and methane flux data from a literature review. Uncertainty in carbon flux was estimated from 10,000 iterations of a Monte Carlo...

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...

Global Gridded 1-km Annual Soil Respiration and Uncertainty Derived from SRDB V3

D.L. Warner, B.P. Bond-Lamberty, J. Jian, E. Stell & R. Vargas
This dataset provides six global gridded products at 1-km resolution of predicted annual soil respiration (Rs) and associated uncertainty, maps of the lower and upper quartiles of the prediction distributions, and two derived annual heterotrophic respiration (Rh) maps. A machine learning approach was used to derive the predicted Rs and uncertainty data using a quantile regression forest (QRF) algorithm trained with observations from the global Soil Respiration Database (SRDB) version 3 spanning from 1961 to...

Export and Leaching of Carbon and Nitrogen from Mississippi River Basin, 1901-2099

H. Tian, S.E. Lohrenz, S. Pan, W.J. Cai & R. He
This dataset provides estimates for export and leaching of dissolved inorganic carbon (DIC), dissolved organic carbon (DIC), total organic carbon (TOC), particulate organic carbon (POC), ammonium (NH4+), nitrate (NO3-), and total organic nitrogen (TON) from the Mississippi River Basin (MRB) to the Gulf of Mexico. The estimates are provided for a historical period of 1901-2014, and a future period of 2010-2099 (carbon estimates only) under two scenarios of high and low levels of population growth,...

ATom: L2 Halocarbons and Hydrocarbons from the UC-Irvine Whole Air Sampler (WAS)

B. Barletta, B.C. Biggs, D.R. Blake, N. Blake, A. Hoffman, S. Hughes, S. Meinardi, N. Vieznor & C.T. Woods
This dataset provides atmospheric concentrations of halocarbons and hydrocarbons measured by the UC-Irvine Whole Air Sampler (WAS) during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. The analysis of samples from the UCI WAS provides measurements of more than 50 trace gases, including C2-C10 NMHCs, C1-C2 halocarbons, C1-C5 alkyl nitrates, and selected sulfur compounds. Species were identified and measured using an established technique of airborne whole air sampling followed by laboratory analysis using gas...

ATom: L2 Measurements from the Programmable Flask Package (PFP) Whole Air Sampler

S.A. Montzka, F.L. Moore & C. Sweeney
This dataset provides mole fractions of atmospheric trace gases measured by the Programmable Flask Package (PFP) Whole Air Sampler during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. The PFP whole air sampler provides a means of automated or manual filling of glass flasks. The sampler is designed to remove excess water vapor from the sampled air and compress it without contamination into ~1-liter volumes. These flasks are analyzed at the NOAA's Global Monitoring...

ATom: L2 Measurements from the NOAA ToF Chemical Ionization Mass Spectrometer (CIMS)

P.R. Veres, J.A. Neuman & T.B. Ryerson
This dataset provides the concentrations of reactive nitrogen and halogen species measured by the NOAA Iodide Ion Time-of-Flight Chemical Ionization Mass Spectrometer (NOAA CIMS) during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. The NOAA CIMS uses chemical ionization mass spectrometric detection of gas phase organic and inorganic analytes via I- adduct formation. Measurements for ATom include N2O5 (dinitrogen pentoxide), ClNO2 (chloro nitrite), Cl2 (Chlorine), HCOOH (formic acid), C2H4O3S (2-Hydroxyacetic acid), BrCl (bromine monochloride),...

ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017

C. SWEENEY & K. MCKAIN
This dataset provides in situ airborne measurements of atmospheric carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), and water vapor concentrations, plus air temperature, barometric pressure, relative humidity, and wind speed values over Alaska and the Yukon and Northwest Territories of Canada during the Arctic Carbon Aircraft Profile (Arctic-CAP) monthly sampling campaigns from April-November 2017. Observations have been averaged to a 10-second interval and are reported with the number of samples (N) and standard deviation....

ATom: L2 In Situ Measurements from the NCAR Airborne Oxygen Instrument (AO2)

B.B. Stephens, E.J. Morgan, A. Watt, J. Bent, S. Afshar, R.F. Keeling & W. Paplawsky
This dataset provides in situ atmospheric oxygen and carbon dioxide concentrations measured by the NCAR Airborne Oxygen Instrument (AO2) during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. The AO2 Instrument measures O2 concentration using a vacuum-ultraviolet absorption technique. ATom deploys an extensive gas and aerosol payload on the NASA DC-8 aircraft for systematic, global-scale sampling of the atmosphere, profiling continuously from 0.2 to 12 km altitude. Flights occurred in each of 4 seasons...

L2 Daily Solar-Induced Fluorescence (SIF) from ERS-2 GOME, 1995-2003

J. Joiner, Y. Yoshida, P. Koehler, C. Frankenberg & N.C. Parazoo
This dataset provides Level 2 Solar-Induced Fluorescence (SIF) of Chlorophyll estimates derived from the Global Ozone Monitoring Experiment (GOME) instrument on the European Space Agency's (ESA's) European Remote-Sensing 2 (ERS-2) satellite. Each file contains daily raw and bias-adjusted solar-induced fluorescence on an orbital basis (land pixels only), at a resolution of 40 km x 320 km, along with quality control information and ancillary data. Data is provided for the period from 19950701 to 20030622. The...

ATom: L2 In Situ Peroxyacetyl Nitrate (PAN) Measurements from Georgia Tech CIMS

L.G. HUEY, J.B. NOWAK, D. TANNER & S. KIM
This dataset provides measurements of two important components of photochemical smog - peroxyacetyl nitrate (PAN) and peroxyl propionyl nitrate (PPN)- measured by the Georgia Tech Chemical Ionization Mass Spectrometer (GT-CIMS) during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. The GT-CIMS measures reactive nitrogen species in the lower atmosphere. ATom deploys an extensive gas and aerosol payload on the NASA DC-8 aircraft for systematic, global-scale sampling of the atmosphere, profiling continuously from 0.2 to...

Ground-Based Vegetation Community Photos, Toolik Lake Area, Alaska, 2014-2015

H.E. Greaves & E.A. Fortin
This dataset contains 731 ground-based nadir vegetation community and ground surface photographs of selected field plots taken as ground reference data for vegetation classification studies at three areas near Toolik Lake, Alaska during the summers of 2014 and 2015. The largest area, 'Toolik', (approximately 6 km2) covers research areas near Toolik Field Station at Toolik Lake, including Arctic LTER installations. The other two areas are each roughly 3 km2: the 'Pipeline' area: a stretch of...

Vulcan Version 3.0 High-Resolution Fossil Fuel CO2 Annual Emissions, USA, 2010-2015

K.R. Gurney, J. Liang, R. Patarasuk, Y. Song, J. Huang & G. Roest
The Vulcan Version 3.0 dataset provides estimates of annual carbon dioxide (CO2) emissions from the combustion of fossil fuels (FF) plus CO2 emissions from cement production for the contiguous 48 states and Alaska, USA. The emissions estimates in Vulcan, referred to as "FFCO2", are provided for (1) the total of all emission sources and (2) emissions as partitioned into 10 source economic sectors (residential, commercial, industrial, electricity production, onroad, nonroad, commercial marine vessel, airport, rail,...

DARTE Annual On-road CO2 Emissions on a 1-km Grid, Conterminous USA V2, 1980-2017

C. GATELY, L.R. HUTYRA & I.S. WING
This data set provides a 38-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 1980-2017 as a continuous surface at a spatial resolution of 1 km.

Snow Depth, Stratigraphy, and Temperature in Wrangell St Elias NP, Alaska, 2016-2018

C.L. COSGROVE, L.R. PRUGH, A.W. NOLIN, K.J. SIVY, R.L. CRUMLEY & M.E. TEDESCHE
This dataset includes data from late-March snow surveys and hourly digital camera images from two study areas within the Wrangell St Elias National Park, Alaska. These data comprise snow density, stratigraphy, and temperature profiles obtained by snow pits; and snow depth data obtained from transects between snow pits. Daily snow depths, adjacent to each pit, were derived from hourly camera images of snow stakes placed adjacent to each pit. These data were collected to constrain...

ABoVE: Ecosystem Map, Great Slave Lake Area, Northwest Territories, Canada, 1997-2011

L.L. Bourgeau-Chavez, J.A. Graham, S. Endres, N.H.F. French, M. Battaglia, D. Hansen & D. Tanzer
This dataset provides an ecosystem type map at 12.5 meter pixel spacing and 0.2 ha minimum mapping unit for the area surrounding Great Slave Lake, Northwest Territories, Canada for the time period 1997 to 2011. The map includes nine classes for peatland, wetland, and upland areas derived from a Random Forest classification trained on multi-date, multi-sensor remote sensing images across the study extent, and using field data and high-resolution Worldview-2 image interpretation for training and...

ATom: L2 Single-Particle Aerosol Composition Measured by the PALMS Instrument

K.D. Froyd, D.M. Murphy & G.P. Schill
This dataset provides estimates of single-particle aerosol composition as measured by the Particle Analysis by Laser Mass Spectrometry (PALMS) instrument during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. Single aerosol particles are classified into several particle types, including: mixed sulfate/organic nitrate, biomass burning, elemental carbon, mineral/metallic, meteoric material, alkali salt, sea salt, heavy oil combustion, and others. PALMS measures aerosol composition for particles from diameter of ~150 to >3000 nm. ATom deploys an...

ATom: L2 Measurements from CU High-Resolution Aerosol Mass Spectrometer (HR-AMS)

J.L. JIMENEZ, P. CAMPUZANO-JOST, D.A. DAY, B.A. NAULT, D.J. PRICE & J.C. SCHRODER
This dataset provides the concentrations of separated ions from inorganic and organic species measured by the High-Resolution Aerosol Mass Spectrometer (HR-AMS). The HR-AMS detects non-refractory submicron aerosol composition by impaction on a vaporizer at 600 degrees C, followed by electron ionization and time-of-flight mass spectral analysis. The measurements include chemically speciated submicron non-refractory particulate mass at a one second and 60 second resolution, and the size distribution of chemically speciated submicron non-refractory particulate mass at...

ATom: L2 Measurements from Medusa Whole Air Sampler (Medusa)

E.J. Morgan, B.B. Stephens, J. Bent, A. Watt, S. Afshar, W. Paplawsky & R.F. Keeling
This dataset provides O2, CO2, N2, Argon, and CO2 isotopes measured by the Medusa Whole Air Sampler during airborne campaigns conducted by NASA's Atmospheric Tomography (ATom) mission. ATom deploys an extensive gas and aerosol payload on the NASA DC-8 aircraft for systematic, global-scale sampling of the atmosphere, profiling continuously from 0.2 to 12 km altitude. Flights occurred in each of 4 seasons from 2016 to 2018. Medusa collected thirty two cryogenically dried, flow and pressure...

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