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- AAO
- Adjacent Arctic Ocean
- AATS
- Ames airborne tracking sunphotometer
- ABL
- atmospheric boundary layer
- ABLE
- Argonne Boundary Layer Experiment
- ABRFC
- Arkansas Basin Red River Forecast Center
- ACARS
- Aerodynamic (Research Incorporated) Communication and Recording System
- ACE
- Aerosol Characterization Experiment
- ACRF
- ARM Climate Research Facility
- ACROS
- airborne cloud-radiation observing system
- ACSYS
- Arctic Climate System Study
- ACT
- ARM Coordination Team
*This acronym is no longer in use.
- ACTIVE
- aerosol and chemical transport in tropical convection
- ADA
- anomalous diffraction approximation
- ADAS
- ARPS data analysis system
- ADEOS
- advanced earth observing system (Japan Space Program)
- ADM
- angular dependence model
- AE
- Angstrom exponent
*This acronym is no longer in use.
- AEBR
- aerosol extinction-to-backscatter ratios
- AEC
- ARM Experiment Center
- AEM
- Automatic Exchange Mechanism
- AER
- Atmospheric Environmental Research, Inc.
- AERI
- atmospheric emitted radiance interferometer
- AERI-ER
- extended-range AERI
- AERI-X
- high-resolution (0.1 cm-1) version of AERI
- AERONET
- Aerosol Robotic Network
- AEROSE
- Aerosol and Ocean Science Expedition
- AES
- airborne emission spectrometer
- AES
- Atmospheric Environment Service
- AFGL
- Air Force Geophysics Laboratory
- AFOSR
- Air Force Office of Scientific Research
- AFWEX
- ARM-FIRE Water Vapor Experiment
- AGARD
- Advisory Group for Aerospace Research and Development
- AGC
- Automatic Gain Control
- AGCMs
- atmospheric general circulation models
- AGL
- above ground level
- AI
- aerosol index
- AIA
- ARM Information Architecture
- AIDJEX
- Arctic Ice Dynamics Joint Experiment
- AIE
- aerosol indirect effect
- AIMS
- Australian Institute of Marine Science
- AIRS
- atmospheric infrared sounder
- AIS
- ARCS Integration Site
*This acronym is no longer in use.
- ALFA
- AER local forecast and assimilation (model)
- AMF
- ARM Mobile Facility
- AMIP
- Atmospheric Model Intercomparison Project
- AMMA
- African Monsoon Multidisciplinary Analysis
- AMSR
- advanced microwave scanning radiometer
- AMSU-B
- Advanced Microwave Sounding Unit-B
- AMT
- ARM Management Team
- ANL
- Argonne National Laboratory
- AOD
- aerosol optical depth
- AOML
- Atlantic Oceanographic and Meteorological Laboratory
- AOS
- aerosol observing system
- AOT
- aerosol optical thickness
- AP
- anisotropy parameter
- APOLLO
- AVHRR Processing Scheme Over Land, Cloud, and Ocean
- APS
- aerosol particle-sizing spectrometer
- ARC
- Ames Research Center
- ARCS
- Atmospheric Radiation and Cloud Station
*This acronym is no longer in use.
- ARCSS
- Arctic System Science (NSF)
- ARCSYM
- Arctic Regional Climate System Model
- ARCUS
- Arctic Research Consortium of the United States
- ARESE
- ARM Enhanced Shortwave Experiment
- ARF
- aerosol radiative forcing
- ARH
- atmospheric radiative heating
- ARINC
- Aerodynamic Research Incorporated Communication
- ARL
- Air Resources Laboratory (NOAA)
- ARM
- Atmospheric Radiation Measurement (Program)
- ARPS
- Advanced Regional Prediction System
- ARS
- Agricultural Research Service
- ARSCL
- active remote sensing of cloud locations
- AS
- anvil stratus
- ASC
- arctic stratus cloud
- ASD
- analytical spectral devices
- ASIR
- absolute scanning infrared radiometer
- ASIVA
- All Sky Infrared Visible Analyzer
- ASOS
- automatic surface observing system
- ASP
- Atmospheric Science Program
- ASR
- aerosol scattering ratio
- ASRC
- Atmospheric Sciences Research Center
- ASTER
- Atmosphere-Surface Turbulent Exchange Research
- ASTEX
- Atlantic Stratocumulus Transition Experiment
- ASTI
- absolute solar transmittance interferometer
- ASTIC
- All Sky Thermal Infrared Camera
- ATD
- Atmospheric Technology Division (NCAR)
- ATHAM
- Active Tracer High-resolution Atmospheric Model
- ATMIS-II
- Atmospheric Moisture Comparison Study
- AVA
- ARM Volume-Imaging Array
- AVHRR
- advanced very-high-resolution radiometer
- AVIRIS
- airborne visible and infrared imaging spectrometer
- AWEX
- AIRS Water Vapor Experiment
*This acronym is no longer in use.
- AWS
- automated weather station
- AZA
- azimuth angle
- BAERI
- Bay Area Environmental Research Institute
- BAMS
- Bulletin of the American Meteorological Society
- BAO
- Boulder Atmospheric Observatory
- BARFEX
- Boardman Atmospheric Radiation Flux Experiment
- BASE
- Beaufort and Arctic Storms Experiment
- BATSE1
- Biosphere-Atmosphere Transfer Scheme, Version 1e
- BBHRP
- broadband heating rate profile
- BBSS
- balloon-borne sounding system
- BC
- black carbon
- BCR
- baseline change request
- BDRF
- bidirectional reflectance functions
- BEO
- Barrow Environmental Observatory
- BF
- boundary facility
- BL
- boundary layer
- BLC
- Belfort laser ceilometer
- BLX
- Boundary Layer Experiment
- BMRC
- Bureau of Meteorological Research Center
- BNL
- Brookhaven National Laboratory
- BOM
- Australian Bureau of Meteorology
- BOMEX
- Barbados Oceanographic and Meteorological Experiment
- BORCAL
- broadband outdoor radiometer calibration
- BOREAS
- Boreal Ecosystem-Atmosphere Study
- BRDF
- bidirectional reflectance distribution function
- BRS
- broadband radiometer station
- BSRN
- baseline surface radiation network
- BT
- back trajectory
- BT
- brightness temperature
- BTD
- brightness temperature difference
- CAGATE
- CCPP-ARM GCM analysis of tendency errors
*This acronym is no longer in use.
- CAGEX
- CERES/ARM/GEWEX
- CALVAL
- Calibration and Validation
- CAMEX
- Convection and Moisture Experiment
- CAPE
- convective available potential energy
- CAP-MBL
- Cloud, Aerosol, and Precipitation in the Marine Boundary Layer (field campaign)
- CAPT
- CCPP-ARM Parameterization Testbed
*This acronym is no longer in use.
- CAR
- corrective action report
- CARL
- CART Raman lidar
*This acronym is no longer in use.
- CART
- Cloud and Radiation Testbed
*This acronym is no longer in use.
- CASES
- Cooperative Atmosphere Surface Exchange Study
- CBH
- cloud base height
- CCD
- charge-coupled device
- CCM1
- Community Climate Model, Version 1
- CCM2
- Community Climate Model, Version 2
- CCM3
- Community Climate Model, Version 3
- CCN
- cloud condensation nuclei
- CCPP
- Climate Change Prediction Program
- CCSM2
- Community Climate System Model, Version 2
- CCSP
- Climate Change Science Program
- CDE
- CART data environment
*This acronym is no longer in use.
- CDL
- cloud detection lidar
- CDR
- circular depolarization ratio
- CEM
- cloud ensemble model
- CEOS
- Committee on Earth Observation Satellites
- CEPEX
- Central Equatorial Pacific Experiment
- CERES
- Clouds and Earth's Radiant Energy System
- CESAR
- Cabauw Experimental Site for Atmospheric Research
- CF
- Central Facility
- CFC
- chlorofluorocarbon
- CFDE II
- Canadian Freezing Drizzle Experiment II
- CGCM
- coupled (ocean-atmosphere) general circulation model
- CGPS
- Continuous Global Positioning System
- CIC
- Cloudiness Intercomparison Campaign
*This acronym is no longer in use.
- CIDS
- CEPEX integrated data system
- CIMMS
- Cooperative Institute for Mesoscale Meteorological Studies
- CIN
- convective inhibition
- CIR
- cloud infrared radiometer
- CIRA
- Cooperative Institute for Research in the Atmosphere
- CIRES
- Cooperative Institute for Research in Environmental Sciences
- CIRPAS
- Center for Interdisciplinary Remotely Piloted Aircraft Studies
- CL
- convective precipitation over land
- CLAMS
- Chesapeake Lighthouse and Aircraft Measurements for Satellites
- CLAP-MBL
- Cloud, Aerosol, and Precipitation in the Marine Boundary Layer (field campaign)
- CLASIC
- Cloud Land Surface Interaction Campaign
- CLASS
- Cross-Chain Loran Atmospheric Sounding System
- CLAVR
- Cloud Advanced Very High-Resolution Radiometer
- CLEX
- Cloud Layer Experiment
- CLIVAR
- Climate Variability and Predictability (Program)
- CLOWD
- Clouds with Low Optical (Water) Depths Working Group
- CLP
- cloud liquid path
*This acronym is no longer in use.
- CLS
- cloud and aerosol lidar system
- CM
- cloud mask
- CMDEWP
- chilled-mirror dew point hygrometer
- CMDL
- Climate Monitoring and Diagnostics Laboratory (NOAA)
- CN
- condensation nucleus
- Co2FLX
- carbon dioxide flux system
- COARE
- Coupled Ocean Atmosphere Response Experiment
- CODE
- Center for Orbit Determination in Europe
- CP
- Cloud Properties Working Group
- CPRS
- cloud profiling radar system
- CPW
- Cloud Properties Working Group
*This acronym is no longer in use.
- CQI
- continuous quality improvement
- CPM
- Cloud Parameterization and Modeling
- CRD
- cavity ring-down
- CRF
- cloud radiative forcing
- CRHF
- cloud radiative heat forcing
- CRM
- cloud-resolving model
- CRS
- Clouds and Radiative Swath
- CRYSTAL-FACE
- Cirrus Regional Study of Tropical Anvils and Cirrus Layers—Florida Area Cirrus Experiment
- CS
- cloudscope
- CSIRO
- Commonwealth Scientific and Industrial Research Organization
- CSM1
- Climate System Model, Version 1
- CSP
- Combined Sensor Program
- CSPHOT
- cimel photometer
- CSPOT
- camel sun photometer
*This acronym is no longer in use.
- CSRM
- cloud system-resolving model
*This acronym is no longer in use.
- CSU
- Colorado State University
- CTBL
- cloud-topped boundary layer
- CUT
- Coordinated Universal Time
- CWV
- columnar water vapor
- DAAC
- Distributed Active Archive Center
- DABUL
- depolarization aerosol and backscatter unattended lidar
- DAO
- data assimilation office
- DART
- discrete angle radiative transfer
- DDI
- downwelling diffuse irradiance
- DEM
- digital elevation model
- DEW
- distant early warning
- DFDI
- diffuse downward irradiance
- dhr
- differential heating rate
- DIAL
- differential absorption lidar
- DLF
- downwelling longwave flux
*This acronym is no longer in use.
- DMF
- Data Management Facility
- DSP
- digital signal processor
- DISORT
- discrete ordinate radiative transfer
- DMS
- Data Management System
- DMT
- Data Management Team
- DNSI
- direct-normal solar irradiance
- DOD
- data object design
- DOE
- U.S. Department of Energy
- DQ
- Data Quality
- DQAR
- Data Quality Assessment Report
- DQ HandS
- Data Quality Health and Status
- DQMS
- Data Quality Management System
- DQO
- Data Quality Office
- DQPR
- Data Quality Problem Report
- DQR
- Data Quality Report
- DRI
- Desert Research Institute
- DSC
- directed scattering coefficients
- DSD
- drop size distribution
- DSIT
- Data and Science Integration Team
- DSP
- Digital Signal Processor
*This acronym is no longer in use.
- DWR
- dual wavelength radio
- EA
- environmental assessment
- EBBR
- energy balance bowen ratio
- EC
- Experiment Center
- ECDL
- external cavity diode laser
- ECLIPS
- Experimental Cloud Lidar Pilot Study
- ECMWF
- European Centre for Medium-Range Weather Forecasts
- ECOR
- eddy correlation
- ED
- experiment design
- EF
- extended facility
- EMEX
- Equatorial Mesoscale Experiment
- EML
- Environmental Measurements Laboratory (DOE)
- ENP/A
- Eastern North Pacific/Atlantic
- ENSO
- El Nino-Southern Oscillation
- EOF
- empirical orthogonal functions
- EOM
- Easter Ocean Margin (CART site)
- EOP
- experiment operation plan
- EOS
- earth observing plan
- EPA
- U.S. Environmental Protection Agency
- EPIC
- Eastern Pacific Investigation of Climate
- EPLAB
- The Eppley Laboratory, Inc.
- ERAST
- Environmental Research Aircraft and Sensor Technology (NASA)
- ERBE
- Earth Radiation Budget Experiment
- ERL
- Environmental Research Laboratory
- EROS
- earth sciences resources observation systems
- ERS-1
- European research satellite-1
- ESFT
- exponential sum fitting of transmission (technique)
- ESRL
- Earth System Research Laboratory
- ESTAR
- electronically scanned thinned array radiometer
- ETA/EDAS
- ETA Data Assimilation System
- ETL
- Environmental Technology Laboratory
- ETM+
- enhanced thematic mapper plus
- EUROCS
- European Project for Cloud Systems Studies
- FAA
- Federal Aviation Administration
- FASCODE
- Fast Atmospheric Signature Code
- FASE
- FASCODE for the environment
- FASINEX
- First Air-Sea Interaction Experiment
- FC
- IISCCP Flux Cloud
- FCC
- fractional cloud cover
- FCCSET
- Federal Coordinating Council on Science, Engineering, and Technology
- FDDA
- four-dimensional data assimilation
- FDTD
- finite-dimensional data assimilation
- FFT
- fast Fourier transform
- FIFE
- First ISLSCP Field Experiment
- FIRE
- First ISCCP Regional Experiment
- FLRT
- flexible, longwave, radiative transfer
- FONSI
- finding of no significant impact
- FOV
- field of view
- FRSR
- fast rotating shadowband radiometer
- FSBR
- fractional solar broadband radiometer
- FSL
- Forecast Systems Laboratory (NOAA)
- FSSP
- forward scattering spectrometer probe
- FTIR
- fourier transform infrared radiometer
- FWHM
- full width at half maximum
- FZL
- freezing level
- GAC
- global area coverage
- GALE
- Genesis of Atmosphere Lows Experiment
- GAPD
- Geiger-mode avalanche photo diode detector
- GAPP
- GEWEX Americas Prediction Project
- GARP
- Global Atmospheric Research Program
- GATE
- GARP Atlantic Tropical Experiment
- GCIP
- GEWEX Continental-Scale International Project
- GCM
- General Circulation Model
*This acronym is no longer in use.
- GCM
- Global Climate Model
*This acronym is no longer in use.
- GCSS
- GEWEX Cloud System Study
- GEBA
- global energy balance archive
- GEISA
- Gestion et Etude des Informations Spectroscopiques Atmospheriques
- GEM
- global environmental multiscale
*This acronym is no longer in use.
- GENESIS
- Global Environmental and Ecological Simulation of Interactive Systems
- GEOS
- Goddard Earth Observing System
- GERB
- Geostationary Earth Radiation Budget
- GEWEX
- Global Energy and Water Experiment
- GFA
- geophysical focus area
- GFDL
- Geophysical Fluid Dynamics Laboratory
- GFS
- Global Forecast System
- GIS
- geophysical information system
- GISS
- Goddard Institute for Space Studies
- GIST
- GEWEX Integrated System Test
- GLCTS
- Global Land Cover Test Site
- GMD
- Global Monitoring Division
- GMS
- geostationary meteorological satellite
- GMT
- Greenwich Mean Time
- GNDRAD
- ground radiometers on stand for upwelling radiation
- ground radiation (collection of radiometers)
- GOALS
- global-ocean-atmosphere-land-system
- GOES
- geostationary operational environmental satellite
- GOME
- Global Ozone Monitoring Experiment
- GPS
- global positioning system
- GRAMS
- ground radiation measurement system
- GSFC
- Goddard Space Flight Center
- GSM
- global spectral model
- GSPO
- Global Studies Program Office
- GTS
- global telecommunications system
- GUI
- graphical user interface
- GVAP
- GEWEX Water Vapor Project
- GWTSA
- gamma-weighed two-stream approximation
- HAPEX
- Hydrology Atmosphere Pilot Experiment
- HAWKS
- HITRAN Atmospheric Workstation
- HEAT
- Houston Environmental Aerosol Thunderstorm (Project)
- HIRLAM
- high-resolution limited area model
- HIS
- high-resolution interferometer spectrometer
- HITRAN
- high-resolution transmission
- HL
- high latitude
- HONER
- hemispherical optimized new radiometer
- HR
- heating rate
- HRDL
- high-resolution doppler lidar
- HSFOVR
- hemispherical field of view radiometer
- HSI
- hemispheric sky imager
- HSRL
- high spectral resolution lidar
- IAP
- in situ aerosol profile
- IARPC
- Interagency Arctic Research Policy
- IASI
- infrared atmospheric sounding interferometer
- ICA
- independent column approximation
- ICE
- Interface Configuration Experiment
*This acronym is no longer in use.
- ICE
- International Cloud Experiment
*This acronym is no longer in use.
- ICI
- Infrared Cloud Imager
- ICL
- integrated cloud liquid
- ICRCCM
- Intercomparison of Radiation Codes in Climate Models
- IDASS
- integrated data assimilation and sounding system
- IDL
- interactive data language
- IDP
- Instrument Development Program
- IF
- intermediate frequency
- IFA
- intensive flux array
- IFN
- ice-forming nuclei
- IFO
- intensive field observation
- IFOV
- instantaneous field of view
- IGBP
- International Geosphere Biosphere Programme
- ILW
- integrated liquid water
- IMG
- Interferometric Monitor of Greenhouse Gases
- IMMS
- Instrument Mentor Monthly Summary
- IMR
- ice mixing ratio
- IOP
- intensive operational period
- IPA
- independent pixel approximation
- IPC
- International Pyrheliometer Comparison
- IPCC
- Intergovernmental Panel on Climate Change
- IPM
- instrument performance model
- IR
- infrared
- IRF
- instantaneous radiative flux
- IRGA
- infrared gas analyzer
- IRICP
- International Research Institute for Climate Prediction
- IRSI
- infrared sky imager
- IRT
- infrared thermometer
- ISAN
- isentropic analysis
- ISCCP
- International Satellite Cloud Climatology Program
- ISDAC
- Indirect and Semi-Direct Aerosol Campaign
- ISLSCP
- International Satellite Land Surface Climatology Project
- ISO
- International Organization for Standardization
- ISO
- intraseasonal oscillations
- ISS
- integrated sounding system
- IT
- instrument team
- ITCZ
- intertropical convergence zone
- ITPP
- International TOVS Processing Package
- IWC
- ice water content
- IWP
- ice water path
- IWV
- integrated water vapor
- JACCS
- Japanese Cloud and Climate Study
- JAMSTEC
- Japanese Marine Science and Technology Center
- JASMINE
- Joint Air-Sea Monsoon Interaction Experiment
- JD
- Julian Day
- JFD
- joint frequency distribution
- JISAO
- Joint Institute for the Study of the Atmosphere and Ocean
- JOSS
- Joint Office for Science Support
- JPL
- Jet Propulsion Laboratory (NASA)
- KNMI
- Royal Netherlands Meteorological Institute
- LAII
- land-atmosphere-ice-interactions
- Lake-ICE
- Lake-Induced Convection Experiment
- LAMS
- limited area models
- LANL
- Los Alamos National Laboratory
- LARC
- Langely Research Center (NASA)
- LASE
- Lidar Atmospheric Sensing Experiment
- LBL
- line-by-line
- LBLRTM
- Line-By-Line Radiative Transfer Model
- LBTM
- Layered Bispectral Threshold Method
- LCL
- lifting condensation level
- LDR
- linear depolarization ratio
- LES
- large-eddy simulation
- LI
- lifted index
- LIDAR
- light detection and ranging
- LIFT
- lidars in flat terrain
- LIRAD
- lidar/radiometer
- LITE
- Lidar In-space Technology Experiment
- LLJ
- low-level jet
- LLNL
- Lawrence Livermore National Laboratory
- LMS
- least median squares
- LN
- liquid nitrogen
- LNA
- low noise amplifier
- LPDM
- Lagrangian Particle Dispersion Model
- LRT
- local recommendation team
- LRU
- lowest replaceable units (spare/replacement parts)
- LST
- Local Standard Time
- LTE
- local thermodynamic equilibrium
- LUT
- look up table
- LW
- longwave
- LWC
- liquid water content
- LWP
- liquid water path
- LWR
- longwave radiation
- MAERI
- marine atmospheric emitted radiance interferometer
- MAPR
- multiple antenna profile radar
- MAPS
- mesoscale atmospheric simulator
- MAQNET
- multi-scale air quality network
*This acronym is no longer in use.
- MAS
- MODIS airborne simulator
- MASRAD
- Marine Stratus Radiation Aerosol and Drizzle
- MAST
- Monterey Area Ship Experiment
- MATCH
- Model for Atmosphere and Chemical Transport
- MBL
- marine boundary layer
- MCBH
- multiple cloud base height
- MCICA
- Monte Carlo Independent Column Approximation
- MCIDAS
- man-computer interactive data analysis system
- MCS
- mesoscale convective system
- MCTEX
- Marine Content Thunderstorm Experiment
- MDN
- meta data navigator
- mdr
- minimum detectable radiance
- MDS
- meta data system
- MDTERP
- Maryland Terrestrial Radiation Package
- MET
- Meteorological Instrumentation at AMF
- MFP
- mean-free-path
- MFR
- multi-filter radiometer
- MFRSR
- multi-filter rotating shadowband radiometer
- MHz
- megahertz
- MIR
- millimeter-wave imaging radiometer
- MISR
- multi-angle imaging spectrometer
- MJO
- Madden-Julian Oscillation
- MLS
- mid-latitude summer
- MLW
- mid-latitude winter
- MM5
- mesoscale model 5
- MMCR
- millimeter wave cloud radar
- MMF
- multi-scale modeling framework
- MMTP
- microwave temperature profiler
- MOA
- memorandum of agreement
- MODIS
- moderate-resolution imaging spectroradiometer
- MODM
- monochromatic optical depth
- MODTRAN
- moderate-resolution atmospheric radiance and transmittance model
- MOLTS
- model output location time series
- MOP
- memorandum of participation
- MOPA
- master oscillator power amplifier
- MOPITT
- measurements of pollution in the troposphere
- MOU
- memorandum of understanding
- M-PACE
- Mixed-Phase Arctic Cloud Experiment
- MPIR
- multi-spectral pushbroom imaging radiometer
- MPL
- micropulse lidar
- MRAS
- mesoscale radiatively-induced anvil spreading
- MRC
- Mission Research Corporation
- MRF
- medium-range forecast
- MRI
- Meteorological Research Institute
- MRO
- maximum-random overlap
- MS
- marine stratus
- MSG
- Meteosat Second Generation
- MSL
- mean sea level
- MSS
- multi-spectral scanner
- MSSA
- multi-channel singular spectral analysis
- MSX
- Mid-Course Space Experiment
- MTP
- microwave temperature profiler
- MWMFOC
- multi-wavelength multifield of view
- MWR
- microwave radiometer
- MWSR
- microwave water substance radiometer
- NASA
- National Aeronautics and Space Administration
- NASDA
- Japanese National Space Development Agency
- NATO
- North Atlantic Treaty Organization
- NBL
- nocturnal boundary layer
- NCAR
- National Center for Atmospheric Research
- NCDC
- National Climatic Data Center
- NCEP
- National Centers for Environmental Prediction
- NDNR
- normalized differences of nadir reflectivity
- NDVI
- Normalized Difference Vegetation Index
- NEP
- noise equivalent power
- NEPA
- National Environmental Policy Act of 1969
- NESDIS
- National Environmental Satellite, Data, and Information Service
- NEXRAD
- next-generation radar
- NFOV
- narrow field of view
- NGS
- National Geodetic Survey
- NIES
- Nauru Island Effect Study
- NIGEC
- National Institute for Global Environmental Change
- NILU
- Norwegian Institute of Air Research
- NIMFR
- normal incidence multi-filter radiometer
- NIP
- normal incidence pyrheliometer
- NIPA
- nonlocal independent pixel approximation
- NIR
- near infrared
- NIST
- National Institute of Standards and Technology
- NMC
- National Meteorological Center
- NNLS
- non-negative least squares
- NOAA
- National Oceanic and Atmospheric Administration
- NPP
- Net Primary Productivity
- NRB
- normalized relative backscatter
- NREL
- National Renewable Energy Laboratory
- NSA
- North Slope of Alaska
- NSA/AAO
- North Slope of Alaska and Adjacent Arctic Ocean
- NSB
- North Slope Borough
- NSF
- National Science Foundation
- NSIDC
- National Snow and Ice Data Center
- NSSL
- National Severe Storms Laboratory
- NTBC
- narrow-to-broadband-conversion
- NWO
- Netherlands Organization for Scientific Research
- NWP
- numerical weather prediction
- NWS
- National Weather Service
- OAII
- Ocean-Atmosphere-Ice-Interactions
- OC
- organic carbon
- OCS
- Oklahoma Climatological Society
- ODEQ
- Oklahoma Department of Environmental Quality
- OGP
- Office of Global Programs
- OKM
- Oklahoma Mesonet
- OLR
- outgoing longwave radiation
- OMT
- ortho-mode transducer
- OMWOG
- Oceans-based Measurements Working Group
- ONR
- Office of Naval Research
- OPC
- optical particle counter
- ORG
- optical rain gauge
- ORNL
- Oak Ridge National Laboratory
- ORR
- Operational Readiness Review
- OSSE
- observation simulation system experiments
- PA
- photoacoustic
- PABSI
- profiling oxygen A-band spectrometer/visible integer
- PAM
- portable automated mesonet
- PAR
- Photosynthetically active radiation
- PASS
- Parameterization of Subgrid Scale
- PBL
- planetary boundary layer
- PCASP
- passive cavity aerosol spectrometer probe
- PDF
- probability distribution function
- PDL
- polarization diversity lidar
- PGS
- precision gas system
- PI
- principal investigator
- PIF
- problem identification form
- PIR
- precision infrared radiometer
- PIRAQ
- PC-integrated acquisition system
- PMEL
- Pacific Marine Environmental Laboratory
- PML
- perfectly matched layer
- PMS
- particle measuring system
- PNNL
- Pacific Northwest National Laboratory
- POES
- polar orbiting environmental satellite
- PPA
- plane parallel approximation
- PPP
- point-to-point protocol
- PRB
- Problem Review Board
- PROBE
- Pilot Radiation Observation Experiment
- PROF
- profile
- PRR
- pre-readiness review
- PSAP
- particle/soot absorption photometer
- PSP
- precision spectral pyranometer
- PSU
- Pennsylvania State University
- PW
- precipitable water
- PWS
- present weather sensor
- PWV
- precipitable water vapor
- QME
- Quality Measurement Experiment
- RADAGAST
- Radiative Divergence using AMF, GERB and AMMA Stations
- RAMS
- regional atmospheric modeling system
- RAOB
- radiosonde observation
- RAPRAD
- rapid radiation transfer model
- RASS
- radio acoustic sounding system
- RCC
- radiometer calibration and characterization
- RCCL
- Royal Caribbean Cruise Lines
- RCF
- radiometer calibration facility
- RCS
- remote cloud sensing
- re
- effective radius
- REBS
- radiation energy balance system
- RegCM2
- regional climate model, Version 2 (NCAR)
- RESET
- Regional Service Team (TWP)
- RF
- radio frequency
- RH
- relative humidity
- RHUBC
- Radiative Heating in Underexplored Bands Campaign
- RISCAM
- Routine In Situ Cloud and Aerosol Measurements
- RL
- Raman lidar
- rms
- root mean square
- ROM
- rough order of magnitude
- RPA
- remotely piloted aircraft
- RPV
- remotely piloted vehicles
- RRTM
- rapid radiative transfer model
- RSMAS
- Rosenstiel School of Marine and Atmospheric Science
- RSP
- research scanning polarimeter
- RSS
- rotating shadowband spectroradiometer
- RT
- radiative transfer
- RUC
- rapid update cycle
- R/V
- research vessel
- RWP
- radar wind profiler
- SABL
- scanning aerosol backscatter lidar
- SAC
- Site Advisory Committee
- SAGE
- Stratospheric Aerosol and Gas Experiment
- SAIC
- Science Application International Corporation
- SAMEX
- Storm and Mesoscale Ensemble Experiment
- SAR
- synthetic aperture radar
- SARB
- Surface and Atmospheric Radiation Budget
- SAS
- sub-arctic summer
- SAW
- sub-arctic winter
- SBIR
- Small Business Innovation Research (grant)
- ScaRaB
- Scanner for Radiation Budget
- SCM
- single-column model
- SCNNLS
- smoothness constrained non-negative least squares
- SCOPE
- San Clemente Ocean Probing Experiment
- SDS
- site data system
- SEARCH
- study of environmental Arctic change
- SESI
- Science and Engineering Services, Inc.
- SGP
- Southern Great Plains
- SHDOM
- Spherical Harmonic Discrete Ordinate Method
- SHEBA
- Surface Heat Budget of the Arctic Ocean (Subprogram of NSF ARCSS Oil)
- SiB2
- simple biosphere model
- SINT
- solar-infrared near-infrared technique
- SIST
- solar-infrared split-window technique
- SIROS
- solar and infrared observing system
- SIRS
- Solar Infrared Station
- SIRTA
- Site Instrumental de Recherche par Teled'etrection Armospherique
- SITAC
- Spectral Imagery Technology Applications Center
- SKYRAD
- sky radiometers on stand for downwelling radiation
- sky radiation (collection of radiometers)
- SL
- stable precipitation over land
- SMET
- Surface Meteorological Instruments for TWP
- SMOS
- Surface Meteorological Observing Station
- SNL
- Sandia National Laboratory
- SNR
- signal-to-noise ratio
- SOL
- site operations log
*Now known as metadata system (MDS)
- SOPAC
- South Pacific Applied Geoscience Commission
- SORTI
- solar radiance transmittance interferometer
- SOW
- statement of work
- SPECTRE
- Spectral Radiance Experiment
- SPIE
- Society of Photo-optic Instrumentation Engineers
- SPM
- site program manager
- SPREP
- South Pacific Regional Environmental Program
- SRB
- surface radiation budget
- SLR
- scanning Raman lidar
- SRRB
- Surface Radiation Research Branch (NOAA)
- SSA
- single-scattering albedo
- SSEC
- Space Science and Engineering Center
- SSFR
- solar spectral flux radiometer
- SSM/I
- special sensor microwave/imager
- SSP
- scanning spectral polarimeter
- SST
- sea-surface temperature
- SSURGO
- Soil Survey Geographic (database)
- STEC
- Science Team Executive Committee
*This acronym is no longer in use.
- STORM-FEST
- Stormscale Operational Research and Meteorology Fronts Experiment Systems Test
- SUCCESS
- Subsonic Aircraft Contrail and Cloud Effects Special Study
- SUNY
- State University of New York
- SURFRAD
- Surface Radiation Budget Network
- SURTHREF
- Surface Temperature and Humidity Reference System for Sondes
- SW
- shortwave
- SWATS
- soil water and temperature system
- SWR
- shortwave radiation
- SWS
- shortwave spectroradiometer
- SWV
- slant water vapor
- SZA
- solar zenith angle
- 2DC
- two-dimensional cloud
- TAO
- Tropical Atmosphere Ocean
- TC-RSR
- thin-cloud rotating shadowband radiometer
- TDDR
- total direct diffuse radiometer
- TDLAS
- tunable diode laser absorption spectrometer
- TDMA
- time division multiple access (from ARM acronym list)
- Tandem Differential Mobility Analyzer
- TEA
- transverse-excited atmospheric pressure
- TEC
- thermoelectric cooler
- TEJ
- tropical easterly jet
- TES
- tropospheric emission spectrometer
- THOR
- Thickness from Offbeam Returns
- THORPEX
- The Observing System Research and Predictability Experiment
*This acronym is no longer in use.
- THWAPS
- temperature, humidity, winds, and pressure system
- TIMEX
- Thunderstorm Initiation Mobile Experiment
- TIPA
- tilted independent pixel approximation
- TIROS
- television and infrared observation satellite
- TIWE
- Tropical Instability Wave Experiment
- TKE
- turbulent kinetic energy
- TM
- thematic mapper
- TMI
- Tropical Rainfall Measurement Mission (TRMM) Microwave Imager
- TOA
- top of the atmosphere
- TOCS
- Tropical Ocean Climate Study
- TOGA-COARE
- Tropical Ocean Global Atmosphere-Coupled Ocean Atmosphere Response Experiment
- TOMS
- total ozone mapping experiment spectrometer
- TOVS
- TIROS operational vertical sounder
- TP
- temperature profiling
- TPS
- total precipitation sensor
- TRMM
- Tropical Rainfall Measuring Mission
- TROA
- time-resolved optoacoustic (cell)
- TSBR
- total broadband radiometer
- TSI
- total sky imager
- TUVR
- total ultraviolet radiometer
- TWP
- Tropical Western Pacific
- TWP-ICE
- Tropical Warm Pool International Cloud Experiment
- TWT
- traveling wave tubes
- TWTA
- Traveling Wave Tube Amplifier
- UAV
- unmanned aerospace vehicle
- UAV-AERI
- miniaturized version of the ground-based AERI
- UCAR
- University Corporation for Atmospheric Research
- UCLA
- University of California, Los Angeles
- UCSD
- University of California, San Diego
- UDF
- UAV demonstration flights
- UIC
- Ukpeagvik Iñupiat Corporation
- UIF
- UAV interim flight
- UIR
- upwelling infrared radiometer
- UNAVCO
- University NAVSTAR Consortium
- UNESCO
- United Nations Education, Scientific, and Cultural Organization
- UPS
- uninterruptable power supply
- URIP
- University Research Instrumentation Program
- USDA
- U.S. Department of Agriculture
- USGCRP
- U.S. Global Change Research Program
- USGS
- U.S. Geological Survey
- USN
- U.S. Navy
- USR
- upwelling solar radiation
- UTC
- Universal Time Coordinates
- UV
- ultraviolet
- UVB
- ultraviolet B
- UVSR
- ultraviolet spectral radiometer
- UW-SSEC
- University of Wisconsin Space Science and Engineering Center
- VAD
- velocity-azimuth display
- VAMOS
- Variability of the American Monsoon System
- VAP
- value-added product
- VAP
- value-added procedure
*This acronym is no longer in use.
- VAP
- value-added processing
*This acronym is no longer in use.
- VCEIL
- Vaisala ceilometer
- VDA
- variational data assimilation
- VIPS
- video ice particle sampler
- VIRS
- visible infrared scanning radiometer
- VIS
- visible
- VISST
- visible infrared solar-infrared split-window technique
- VOCALS
- VAMOS Ocean-Cloud-Atmosphere-Land Study
- VOCAR
- variation of coastal atmospheric refractivity
- VORTEX
- Verification of the Origins of Rotation in Tornadoes Experiment
- VPD
- vapor pressure deficit
- VTLC
- video time-lapsed camera
- VZA
- viewing zenith angle
- WACR
- w-band ARM cloud radar
- WCR
- Wyoming cloud radar
- WCRP
- World Climate Research Programme
- WFOV
- wide field of view
- WHOI
- Woods Hole Oceanographic Institution
- WISG
- World Infrared Standard Group
- WISP
- Winter Icing and Storms Project
- WMO
- World Meteorological Organization
- WP
- warm pool
- WPDN
- wind-profiler demonstration network
- WPL
- Wave Propagation Laboratory
- WRC
- World Radiation Center
- WRF
- Weather Research and Forecasting (Model)
- WRR
- World Radiometric Reference
- WSFO
- Weather Service Forecast Office
- WSG
- World Standard Group
- WSI
- whole sky imager
- WSR-88D
- weather surveillance radar-88 Dopplers
- WV
- water vapor
- WVP
- water vapor profiling
- WVR
- water vapor radiometer
- XDC
- External Data Center (ARM)
- YES
- Yankee Environmental Systems
- ZSS
- Zvenigorod Scientific Station
- ZWD
- zenith wet delay