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National Aeronautics and Space Administration

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4D-Var Four-Dimensional Variation
AAAS American Association for the Advancement of Science
AAFC Agriculture and Agri-Food Canada
ABoVE Arctic-Boreal Vulnerability Experiment 
ABR Arctic and Boreal Region
ACCER Alaska Climate Change Executive Roundtable
ACCESS Advancing Collaborative Connections for Earth System Science
ACE Aerosol-Cloud-Ecosystems
ACOS Atmospheric CO2 Observations from Space
AERONET Aerosol Robotics Network
AES Airborne Emissions Spectrometer
AGAGE Advanced Global Atmospheric Gases Experiment
AGB Above Ground Biomass
AGCM Atmospheric General Circulation Model
AGU American Geophysical Union
AirMOSS Airborne Microwave Observatory of Subcanopy and Subsurface
AIRS Atmospheric Infrared Sounder
AIS ABoVE Information System
AISCG ABoVE Information System Coordinating Group
AIST Advanced Information Systems Technology
AKDOF Alaska Division of Forestry
ALI Advanced Land Imager
ALOS Advanced Land Observing Satellite
AMSR-E Advanced Microwave Scanning Radiometer for EOS
AMSU-A Advanced Microwave Sounding Unit - A
AO Arctic Ocean
ARC Ames Research Center
ART Arctic in Rapid Transition
ASCAT Advanced Scatterometer
ASCENDS Active Sensing of CO2 Emissions over Nights, Days and Seasons
ASR ABoVE Study Region
ASSG ABoVE Science Steering Group
ASTER Advanced Spaceborne Thermal Emission and Reflection Radiometer
ATI Advanced Technology Initiatives
AVHRR Advanced Very High Resolution Radiometer
AVIRIS Airborne Visible/Infrared Imaging Spectrometer
BCLTER Bonanza Creek Long Term Ecological Research
BER  DOE Office of Biological and Environmental Research
BLM Bureau of Land Management
BOREAS Boreal Ecosystem-Atmosphere Study
BRDF Bidirectional reflectance Distribution Function
BSi Biogenic Silica
CarboNA Canada-U.S.-Mexico Carbon Program in North America
CARVE Carbon in Arctic Reservoirs Vulnerability Experiment
CASA Carnegie Ames Stanford Approach- a global ecosystem model
CCE Carbon Cycle and Ecosystems
CCEO Carbon Cycle and Ecosystems Office
CCIWG Carbon Cycle Interagency Working Group
CCRS Canadian Center for Remote Sensing
CCS carbon capture and storage
CCSP Climate Change Science Program
CCSSG Carbon Cycle Science Steering Group
CDOM Chromophoric Dissolved Organic Matter
CENR Committee on Environment and Natural Resources Research
CEOS Committee on Earth Observation Satellites
CERES Clouds and the Earth's Radiant Energy System
CFS Canadian Forest Service
CH4 Methane
CMS Carbon Monitoring System
CO2 Carbon dioxide
CSA Canadian Space Agency
CZCS Coastal Zone Color Scanner
DAAC Distributed Active Archive Center
DESDynI Deformation, Ecosystem Structure, and Dynamics of Ice
DLEM Dynamic Land Ecosystem Model
DLR German Space Agency
DEM Digital Elevation Model
DIC Dissolved Inorganic Carbon
DLU Discrete Landscape Unit
DOC Dissolved Organic Carbon
DOE Department of Energy
DOI Department of the Interior
ECCO2 Estimating the Circulation and Climate of the Ocean, Phase II
ED Ecosystem Demography
EDC EROS Data Center
EIWG Ecosystems Interagency Working Group
ENVISAT Environmental Satellite
EO-1 Earth Observing-1
EOS Earth Observing System
EPA Environmental Protection Agency
EPO Education and Public Outreach
EROS Earth Resources Observation and Science
ERS Earth Resources Satellite
ESA European Space Agency
ESRL Earth System Research Laboratory
ESSF Earth System Science Fellowship
ESSP Earth System Science Pathfinder
ESTO Earth Science Technology Office
ETM+ Enhanced Thematic Mapper Plus
EVI Enhanced Vegetation Index
FACE Free Air CO2 Enrichment
FAO Flight Activities Officer
FAS Foreign Agricultural Service
FAS Foreign Agricultural Service
FIA USDA Forest Service Forest Inventory and Analysis
FIADB Forest Inventory Analysis Database
FIFE First ISLSCP Field Experiment
FluxNet Flux Network (Should we remove this?)
FPAR Fractional Photosynthetically Active Radiation
FSCG Field Studies Coordinating Group
FTIR Fourier Transform Infrared Spectroscopy
GAC Global Area Coverage
GCM General Circulation Model
GCOM Global Change Observation Mission
GCP Global Carbon Project
GCWG Government Coordinating Working Group
GEO Group on Earth Observation
GEO-CAPE Geostationary Coastal and Air Pollution Events Mission
GEOS-Chem Goddard Earth Observing System Chem model- a global 3-D chemical transport model
GEOSS Global Earth Observation System of Systems
GFED Global Fire Emissions Database
GHG Greenhouse Gas
GLAS Geoscience Laser Altimeter System
GLODAP Global Data Analysis Project
GLP Global Land Project
GLS Global Land Surveys
GMAO Global Modeling and Assimilation Office
GOCART Global Ozone Chemistry Aerosol Radiation Transport
GOFC/GOLD Global Observation of Forest and Land Cover Dynamics
GOOS Global Ocean Observing System
GOSAT Greenhouse gases Observing SATellite
GPM Global Precipitation Measurement
GPP Gross Primary Productivity
GRACE Gravity Recovery and Climate Experiment
GSFC Goddard Space Flight Center
GTOS Global Terrestrial Observing System
HNL High Northern Latitude
HSB Humidity Sounder for Brazil
HyspIRI Hyperspectral Infrared Imager
IARC International Arctic Research Center
IASI Infrared Atmospheric Sounding Interferometer
ICESat-II Ice, Cloud, and Land Elevation Satellite-II
ICSU International Council for Science
IDL Interactive Data Language
IGBP International Geosphere-Biosphere Programme
IGOL Integrated Global Observations for Land
IGOS Integrated Global Observing System
IGOS-P Integrated Global Observing System-P
IHDP International Human Dimensions Programme
IIP Instrument Incubator Program
iLEAPS Integrated Land Ecosystem-Atmosphere Processes Study
IMBER Integrated Marine Biogeochemistry and Ecosystem Research
IMF Integrated Modeling Framework
IOCCG International Ocean Color Coordinating Group
IOOS NOAA Integrated Ocean Observation System
IPCC Intergovernmental Panel on Climate Change
IPY International Polar Year
ISLSCP International Satellite Land Surface Climatology Project
IWG Interagency Working Group
JAMSTEC Japan Agency for Marine-Earth Science and Technology
JAXA EORC Japan Aerospace Exploration Agency Earth Observing Research Center
JGOFS Joint Global Ocean Flux Study
JPL Jet Propulsion Lab
JPSS Joint Polar-orbitting Satellite System
JSOST Joint Subcommittee on Ocean Science and Technology
LAC Local Area Coverage
LAI Leaf Area Index
Landsat TM Landsat Thematic Mapper
Landsat ETM Landsat Enhanced Thematic Mapper
LBA Large Scale Biosphere-Atmosphere Experiment in Amazonia
LCC Landscape Conservation Cooperative
LCLUC Land Cover and Land Use Change
LDCM Landsat Data Continuity Mission
LEDAPS Landsat Ecosystem Disturbance Adaptive Processing System
LIDAR Light Detection And Ranging
LIST Lidar Surface Topography
LP DAAC Land Processes Distributed Active Archive Center
LTER Long Term Ecological Research
LUCC Land Use and Cover Change
LUIWG Land Use Interagency Working Group
LULCC Land Use and Land Cover Change
LVIS Laser Vegetation Imaging Sensor
MAIRS Monsoon Asia Integrated Regional Study
MAST-DC Modeling and Synthesis Thematic Data Center
MCI Mid-Continent Intensive
MDGLS Mid-Decadal Global Land Survey
MEaSUREs Making Earth System data records for Use in Research Environments
MERRA Modern Era Retrospective-Analysis for Research and Applications
MISR Multi-angle Imaging Spectroradiometer
MITgcm Massachusetts Institute of Technology general circulation model
MODIS Moderate Resolution Imaging Spectroradiometer
MOPITT Measurements of Pollution in the Troposphere
MRV Monitoring, Reporting, and Verification
MSP Multidisciplinary Science Project
MWG Modeling Working Group
NACP North American Carbon Program
NAFD North American Forest Dynamics
NASA National Aeronautics and Space Administration
NCAR National Center for Atmospheric Research
NDVI Normalized Difference Vegetation Index
NED National Elevation Data
NEE Net Ecosystem Exchange
NEESPI Northern Eurasian Earth Science Partnership Initiative
NENA Northeastern North American
NEON National Ecological Observatory Network
NEP Net Ecosystem Production
NESSF NASA Earth and Space Science Fellowship
netCDF Network Common Data Forms
NGEE Next Generation Ecosystem Experiment
NGO Nongovernmental Organization
NIST National Institute for Standards and Technology
NLCD National Land Cover Dataset
NOAA National Oceanic and Atmospheric Administration
NOBM NASA Ocean Biogeochemical Model
NPOESS National Polar-orbiting Operational Environmental Satellite System
NPP Net Primary Productivity
NPP NPOESS Preparatory Project
NPS National Park Service
NRA NASA Research Announcement
NRC National Research Council
NSCAT NASA Scatterometer
NSERC Natural Sciences and Engineering Research Council of Canada
NSF National Science Foundation
NSPIRES NASA Solicitation and Proposal Integrated Review and Evaluation System
NSSI North Slope Science Initiative
OASIM Ocean-Atmosphere Spectral Irradiance Model
OC Ocean Color
OCB Ocean Carbon and Biogeochemistry Program
OCB-SSG Ocean Carbon and Biogeochemistry Program - Scientific Steering Group
OCCC Ocean Carbon and Climate Change
OCCC-SSG Ocean Carbon and Climate Change - Scientific Steering Group
OCO Orbiting Carbon Observatory
OCO-2 Orbiting Carbon Observatory-2
OOI Ocean Observatories Initiative
ORNL Oak Ridge National Laboratory
OSTM Ocean Surface Topography Mission
OTTER Oregon Transect Ecosystem Research
PABA Pan Arctic/Boreal Assessment
PACE Pre-ACE (Aerosol-Cloud-ocean Ecosystem)
PALS Passive Active L and S Band microwave sensor
PALSAR Phased Array type L-band Synthetic Aperture Radar
PCTM Parametrized Chemical Transport Model
PI Principal Investigator
PIC Particulate Inorganic Carbon
POC Particulate Organic Carbon
POES Polar Orbiting Environmental Satellite
PRA Primary Research Area
QuikSCAT Quick Scatterometer
RCN Research Coordinating Group
RCP Respresentative Concentration Pathway
REASoN Research, Education, and Applications Solution Network
REDD Reducing Emissions from Deforestation and Degradation
ROSES Research Opportunities in Space and Earth Sciences
RSCG Remote Sensing Coordinating Group
SAP Synthesis and Assessment Product
SAR Synthetic Aperture Radar
SCIAMACHY Scanning Imaging Absorption Spectrometer for Atmospheric Cartography
SeaWiFS Sea-viewing Wide Field-of-view Sensor
SDT Science Definition Team
SEARCH Study of Environmental Change in the Arctic
SIMOR Subcommittee on Integrated Management of Ocean Resources
SMAP Soil Moisture Active and Passive
SO GasEx Southern Ocean Gas Exchange Experiment
SOCCR State of the Carbon Cycle Report
SOLAS Surface Ocean Lower Atmosphere Study
SPOT Systeme Pour l'Observation de la Terre (System for Earth Observation)
SRA Secondary Research Area
SRTM Shuttle Radar Topography Mission
SSC Scientific Steering Committee
SSG Science Steering Group
SSM/I Special Sensor Microwave/Imager
SST Sea Surface Temperature
ST Science Team
START global change SysTem for Analysis, Research, and Training
STEM Science, Technology, Engineering,and Mathematics
Suomi NPP Suomi National Polar-orbiting Partnership
TCCON Total Carbon Column Observing Network
TE Terrestrial Ecology
TES Tropospheric Emission Spectrometer
TM Thematic Mapper
TOPS Terrestrial Observation and Prediction System
TRMM Tropical Rainfall Measuring Mission
UAVSAR Unmanned Aerial Vehicle Synthetic Aperture Radar
UCAR University Center for Atmospheric Research
UGEC Urban and Global Environmental Change
USAID United States Agency for International Development
USDA United States Department of Agriculture
USFS United States Forest Service
USFWS United States Fish and Wildlife Service
USGCRP  United States Global Change Research Program
USGS U.S. Geological Survey
USOAP U.S. Ocean Action Plan
VIIRS Visible Infrared Imaging Radiometer Suite
VOS Volunteer Observing Ships
VuRSAL Vulnerability and Resiliency of Arctic and Sub-Arctic Landscapes 
WCRP World Climate Research Program
WGCV Working Group on Calibration and Validation
WOCE/JGOFS World Ocean Circulation Experiment/ Joint Global Ocean Flux Study