Acronyms / Glossary

0-9

2D-MAX-DOAS
two-dimensional multi-axis differential optical absorption spectroscopy
2D-S
(stereo) optical array spectrometer
2DC
two-dimensional cloud
4STAR
Spectrometer for Sky-scanning Sun-Tracking Atmospheric Research (NASA)

A

A-ATOFMS
Aircraft-aerosol time-of-flight mass spectrometer
AA
absorbing aerosols
AAF
ARM Aerial Facility
AAO
Adjacent Arctic Ocean
AAOD
aerosol absorption optical depth
AATS
Ames airborne tracking sunphotometer
ABE
Aerosol Best Estimate
ABL
atmospheric boundary layer
ABLE
Argonne Boundary Layer Experiment
ABoVE
Arctic-Boreal Vulnerability Experiment
ABRFC
Arkansas Basin Red River Forecast Center
ACAPEX
ARM Cloud Aerosol Precipitation Experiment
ACARS
Aerodynamic (Research Incorporated) Communication and Recording System
ACE
Aerosol Characterization Experiment
ACE-ENA
Aerosol and Cloud Experiments in the Eastern North Atlantic
ACI
aerosol-cloud interactions
ACME
Accelerated Climate Model for Energy
ACROS
airborne cloud-radiation observing system
ACSM
Aerosol Chemical Speciation Monitor
ACSYS
Arctic Climate System Study
ACT
ARM Coordination Team (no longer in use)
ACTIVE
aerosol and chemical transport in tropical convection
ACTOS
Airborne Cloud Turbulence Observation System
ADA
anomalous diffraction approximation
ADAS
ARPS data analysis system
ADEOS
advanced earth observing system (Japan Space Program)
ADI
ARM Data Integrator
ADM
angular dependence model
AE
Angstrom exponent (no longer in use)
AEB
Agencia Espacial Brasileira
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
AETH
Aethalometer
AFGL
Air Force Geophysics Laboratory
AFOSR
Air Force Office of Scientific Research
AFRC
Armstrong Flight Research Center
AFRL
Air Force Research Laboratory
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
AGU
American Geophysical Union
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 (no longer in use)
ALC-IOP
Aerosol Lifecycle Intensive Observational Period (a 2011 U.S. DOE field campaign)
ALFA
AER local forecast and assimilation (model)
ALIVE
Aerosol Lidar Validation Experiment
ALM
ACME Land Model
ALOSE
Along Line of Site Experiment
ALTOS
Arctic Lower Troposphere Observed Structure
AMAP
Arctic Monitoring and Assessment Program (Arctic Council)
AMAZE
Amazonian Aerosol Characterization Experiment
AME
aerosol microphysical effect
AMEX
Australian Monsoon Experiment
AMF
ARM Mobile Facility
AMIE
ACRF MJO Investigation Experiment
AMIP
Atmospheric Model Intercomparison Project
AMMA
African Monsoon Multidisciplinary Analysis
AMS
aerosol mass spectrometer or accelerator mass spectrometer
AMSL
above mean sea level
AMSR
advanced microwave scanning radiometer
AMSU-B
Advanced Microwave Sounding Unit-B
AMT
ARM Management Team or Aerosol Modeling Testbed
ANL
Argonne National Laboratory
AOD
aerosol optical depth
AOML
Atlantic Oceanographic and Meteorological Laboratory
AOPCIC
Aerosol Optical Particle Counter Intercomparison Campaign
AOS
aerosol observing system
AOT
aerosol optical thickness
AP
anisotropy parameter
APOLLO
AVHRR Processing Scheme Over Land, Cloud, and Ocean
APREF
Asia-Pacific Reference Frame
APS
aerosol particle-sizing spectrometer or aerodynamic particle sizer
AR
atmospheric river
ARC
Ames Research Center
ARCS
Atmospheric Radiation and Cloud Station (no longer in use)
ARCSS
Arctic System Science (NSF)
ARCSYM
Arctic Regional Climate System Model
ARCTAS
Arctic Research of the Composition of the Troposphere from Aircraft and Satellite
ARCUS
Arctic Research Consortium of the United States
ARE
aerosol radiative effect
ARESE
ARM Enhanced Shortwave Experiment
ARF
aerosol radiative forcing
ARGN
Australian Regional GPS Network
ARH
atmospheric radiative heating
ARI
aerosol-radiation interactions
ARIES
Aryabhatta Research Institute of Observational Sciences
ARINC
Aerodynamic Research Incorporated Communication
ARL
Air Resources Laboratory (NOAA)
ARM
Atmospheric Radiation Measurement
ARM-ACME
ARM Airborne Carbon Measurements
ARMBE
ARM best estimate (data products)
ARMBEATM
ARM Best Estimate Atmospheric Measurements value-added product
ARMBECLDRAD
ARM Best Estimate Cloud Radiation value-added product
ARPS
Advanced Regional Prediction System
ARS
Agricultural Research Service
ARSCL
Active Remotely Sensed Cloud Locations (an ARM VAP)
AS
anvil stratus
ASC
arctic stratus cloud
ASCAT
Advanced SCATterometer
ASCII
American Standard Code for Information Interchange file format
ASD
analytical spectral devices
ASIR
absolute scanning infrared radiometer
ASIVA
All Sky Infrared Visible Analyzer
ASOP
atmospheric soil organic particles
ASOS
automatic surface observing system
ASP
Atmospheric Science Program
ASPEN
Atmospheric Sounding Processing Environment (NCAR software)
ASR
aerosol scattering ratio
ASRC
Atmospheric Sciences Research Center
ASSIST
Atmospheric Sounder Spectrometer for Infrared Spectral Technology
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
ATTREX
Airborne Tropical Tropopause Experiment
AVA
ARM Volume-Imaging Array
AVHRR
advanced very-high-resolution radiometer
AVIRIS
airborne visible and infrared imaging spectrometer
AVOC
anthropogenic volatile organic carbon
AVP
ARM Aerial Vehicles Program
*As of February 2009, this program was renamed ARM Aerial Facility.
AWARE
ARM West Antarctic Radiation Experiment
AWEX
AIRS Water Vapor Experiment (no longer in use)
AWS
automated weather station
AZA
azimuth angle

B

BAECC
Biogenic Aerosols - Effects on Clouds and Climate
BAECC SNEX
Biogenic Aerosols--Effects on Clouds and Climate: Snowfall Experiment
BAERI
Bay Area Environmental Research Institute
BAMEX
Bow Echo and MCV Experiment
BAMS
Bulletin of the American Meteorological Society
BAO
Boulder Atmospheric Observatory
BARC
Barrow Arctic Research Center
BARFEX
Boardman Atmospheric Radiation Flux Experiment
BASE
Beaufort and Arctic Storms Experiment
BATSE1
Biosphere-Atmosphere Transfer Scheme, Version 1e
BB
biomass burning
BBCEAS
broadband cavity enhanced absorption spectrometer
BBHRP
broadband heating rate profile
BBOP
Biomass Burning Observation Project
BBSS
balloon-borne sounding system
BC
black carbon
BC4
Boston College-Aerodyne led Coated Black Carbon Study
BCR
baseline change request
BCS
Bayesian Compressive Sensing
BDRF
bidirectional reflectance functions
BEACHON
Bio-hydro-atmosphere interactions of Energy, Aerosols, Carbon, H2O, Organics & Nitrogen project
BEO
Barrow Environmental Observatory
BER
Biological and Environmental Research
BF
boundary facility
BIC
Bayesian Information Criterion
BL
boundary layer
BLC
Belfort laser ceilometer
BLCWG
Boundary Layer Cloud Working Group (GCSS)
BLH
boundary layer height
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
BSRWP
beam-steered radar wind profiler
BT
back trajectory
BTD
brightness temperature difference
BVOC
biogenic volatile organic compound

C

C-LAMP
Carbon-Land Model Intercomparison Project
C4MIP
Coupled Climate-Carbon Cycle MIP
CAA
Clean Air Act (U.S.)
CABL
Characterizing the Atmospheric Boundary Layer
CACTI
Cloud, Aerosol, and Complex Terrain Interactions
CAD
computer-aided design
CAGATE
CCPP-ARM GCM analysis of tendency errors (no longer in use)
CAGEX
CERES/ARM/GEWEX
CALIOP
Cloud-Aerosol Lidar with Orthogonal Polarization
CALIPSO
Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation
CalNex
California Nexus of Air Quality and Climate Experiment
CALVAL
Calibration and Validation
CAM-5
NCAR Community Atmosphere Model
CAMEX
Convection and Moisture Experiment
CAP-MBL
Cloud, Aerosol, and Precipitation in the Marine Boundary Layer
CAPE
convective available potential energy
CAPI
cloud-aerosol-precipitation interactions
CAPPI
Constant Altitude Plan Position Indicators
CAPS
cloud, aerosol, and precipitation spectrometer
CAPS-PMEX
Cavity Attenuated Phase Shift Extinction Monitor
CAPT
CCPP-ARM Parameterization Testbed (no longer in use)
CAR
corrective action report
CARB
California Air Resources Board
CARES
Carbonaceous Aerosol and Radiative Effects Study
CARL
CART Raman lidar (no longer in use)
CART
Cloud and Radiation Testbed (no longer in use)
CARVE
Carbon in the Arctic Reservoirs Vulnerability Experiment
CAS
cloud aerosol spectrometer
CASA
Carnegie Ames Stanford Approach
CASES
Cooperative Atmosphere Surface Exchange Study
CAST
Co-ordinated Airborne Studies in the Tropics
CASTNET
Clean Air Status and Trend Network
CAWCR
Centre for Australian Weather and Climate Research
CBH
cloud base height
CBL
convective boundary layer
CCAP
Characterization of Cirrus and Aerosol Properties
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
CCSEM/EDX
computer-controlled scanniing electron microscopy/energy-dispersive X-ray spectroscopy
CCSM2
Community Climate System Model, Version 2
CCSP
Climate Change Science Program or Carbon Cycle Science Plan
CDE
CART data environment (no longer in use)
CDF
cumulative distribution function
CDL
cloud detection lidar
CDNC
cloud droplet number concentration
CDP
cloud droplet probe
CDR
circular depolarization ratio or Critical Design Review
CE
collection efficiency
CEM
cloud ensemble model
CEOS
Committee on Earth Observation Satellites
CEP
cloud extinction probe
CEPEX
Central Equatorial Pacific Experiment
CERES
Clouds and the Earth\'s Radiant Energy System
CESAR
Cabauw Experimental Site for Atmospheric Research
CESD
Climate and Environmental Science Division
CESM
Community Earth System Model
CF
Central Facility or Climate and Forecast
CFC
chlorofluorocarbon
CFCR
Centroid Frequency Chirp Rate
CFDC
continuous flow diffusion chamber
CFDE II
Canadian Freezing Drizzle Experiment II
CFH
cryogenic frost point hygrometer
CFI
Canada Foundation for Innovation
CFMIP
Cloud Feedback Model Intercomparison Project
CFSR
Climate Forecast System Reanalysis
CGA
calibration, grooming, and alignment
CGCM
coupled (ocean-atmosphere) general circulation model
CGPS
Continuous Global Positioning System
CHAPS
Cumulus Humilis Aerosol Processing Study
CHARMS
CH4 Atmospheric Remote Monitoring
CIC
Cloudiness Intercomparison Campaign (no longer in use)
CIDS
CEPEX integrated data system
CIMMS
Cooperative Institute for Mesoscale Meteorological Studies
CIN
convective inhibition
CINDY2011
Cooperative Indian Ocean Experiment on Intraseasonal Variability in Year 2011
CIP
column intensive properties
CIR
cloud infrared radiometer
CIRA
Cooperative Institute for Research in the Atmosphere
CIRES
Cooperative Institute for Research in Environmental Sciences (U. of Colorado)
CIRPAS
Center for Interdisciplinary Remotely Piloted Aircraft Studies
CL
convective precipitation over land
CLAMPS
Collaborative Lower Atmospheric Mobile Profiling System
CLAMS
Chesapeake Lighthouse and Aircraft Measurements for Satellites
CLAP
continuous light absorption photometer
CLASIC
Cloud Land Surface Interaction Campaign
CLASS
Cross-Chain Loran Atmospheric Sounding System
CLAVR
Cloud Advanced Very High-Resolution Radiometer
CLEARFLO
Clean Air for London
CLEX
Cloud Layer Experiment
CLIVAR
Climate Variability and Predictability (Program)
CLM
Community Land Model
CLOWD
Clouds with Low Optical (Water) Depths Working Group
CLP
cloud liquid path (no longer in use)
CLS
cloud and aerosol lidar system
CLWG
Cloud Lifecycle Working Group
CM
cloud mask
CMAQ
Community Multiscale Air Quality
CMBE
Climate Modeling Best Estimate
CMDEWP
chilled-mirror dew point hygrometer
CMDL
Climate Monitoring and Diagnostics Laboratory (NOAA)
CMIP
Coupled Model Intercomparison Project
CMMG
Center of Climate, Meteorology, and Climate change (University of the Azores)
CMORPH
Climate Prediction Center Morphing Technique
CN
condensation nucleus
CNES
Centre National d\'Etudes Spatiales
CNPq
Brazilian National Council for Scientific and Technological Development
CO2FLX
carbon dioxide flux measurement systems
Co2FLX
carbon dioxide flux system
COARE
Coupled Ocean Atmosphere Response Experiment
COBRA
CO2 Budget and Rectification Airborne stody
COD
cloud optical depth
CODE
Center for Orbit Determination in Europe
CONTRAST
CONvective TRansport of Active Species in the Tropics
CONUS
continental United States
COPS
Convective and Orographically-induced Precipitation Study
COSP
CFMIP Observation Simulator Package
CP
Cloud Properties Working Group
CPI
cloud particle imager
CPM
Cloud Parameterization and Modeling
CPOL
C-band polarimetric radar
CPRS
cloud profiling radar system
CPW
Cloud Properties Working Group (no longer in use)
CQI
continuous quality improvement
CRAICC
Nordic Centre of Excellence
CRD
cavity ring-down
CRE
cloud shortwave radiative effect
CRF
cloud radiative forcing
CRHF
cloud radiative heat forcing
CRL
compact Raman lidar
CRM
cloud-resolving model
CROC
Convective Radio Occultations Campaign
CRS
Clouds and Radiative Swath
CRYSTAL-FACE
Cirrus Regional Study of Tropical Anvils and Cirrus Layers—Florida Area Cirrus Experiment
CS
cloudscope
CSI
cloud spectrometer and impactor or clear-sky identification
CSIRO
Commonwealth Scientific and Industrial Research Organization
CSLAEX
Cross-Scale Land-Atmosphere Experiment
CSM1
Climate System Model, Version 1
CSP
Combined Sensor Program
CSPHOT
cimel photometer
CSPOT
camel sun photometer (no longer in use)
CSRM
cloud system-resolving model (no longer in use)
CSU
Colorado State University
CTBL
cloud-topped boundary layer
CTFS
Center for Tropical Forest Science
CTH
cloud top height
CTM
chemical transport model
CUT
Coordinated Universal Time
CW3E
Center for Western Weather and Water Extremes
CWV
columnar water vapor
CZO
Critical Zone Observatory

D

DAAC
Distributed Active Archive Center
DABUL
depolarization aerosol and backscatter unattended lidar
DACCIWA
Dynamics-aerosol-chemistry-cloud interactions in West Africa
DAO
data assimilation office
DART
discrete angle radiative transfer
DAWEX
Darwin Wave Experiment
DC3
Deep Convective Clouds and Chemistry
DCC
deep convective cloud
DDI
downwelling diffuse irradiance
DEM
digital elevation model
DER
droplet effective radius
DESI
desorption electrospray ionization
DEW
distant early warning
DFDI
diffuse downward irradiance
DFG
Deutsche Forschungsgemeinschaft (German Research Foundation)
DFIR
Double-Fence Intercomparison Reference
DGVM
dynamic global vegetation model
dhr
differential heating rate
DIAL
differential absorption lidar
DISORT
discrete ordinate radiative transfer
DLF
downwelling longwave flux (no longer in use)
DLR
Deutsches Zentrum fur Luft- und Raumfahrt (German Aerospace Center)
DMA
differential mobility analyzer
DMF
Data Management Facility or dry air mole fraction
DMS
Data Management System
DMT
Data Management Team or Droplet Measurement Technologies
DNSI
direct-normal solar irradiance
DOAS
differential optical absorption spectroscopy
DOD
data object design
DOE
U.S. Department of Energy
DOF
depth of field
DOFS
degree of freedom for signal
DOI
Digital Object Identifier
DQ
Data Quality
DQ HandS
Data Quality Health and Status
DQAR
Data Quality Assessment Report
DQM
Data Quality Manager
DQMS
Data Quality Management System
DQO
Data Quality Office
DQPR
Data Quality Problem Report
DQR
Data Quality Report
DRF
direct radiative forcing
DRI
Desert Research Institute
DSC
directed scattering coefficients
DSD
drop size distribution
DSIT
Data and Science Integration Team
DSP
digital signal processor
DVM
dynamic vegetation model
DWR
dual wavelength radio
DYMECS
Dynamical and Microphysical Evolution of Convective Storms
DYNAMO
Dynamics of the Madden-Julian Oscillation (MJO)

E

EA
environmental assessment
EARLINET
European Aerosol Research Lidar Network
EB
energy balance
EBBR
energy balance bowen ratio
EC
Experiment Center or eddy correlation or Environment Canada
ECC
electrochemical cell
ECDL
external cavity diode laser
ECLIPS
Experimental Cloud Lidar Pilot Study
ECMWF
European Centre for Medium-Range Weather Forecasts
ECOR
eddy correlation or eddy correlation flux measurement system
ECR
Engineering Change Request
ECV
essential climate variable
ED
experiment design
EDAS
Eta Data Assimilation System
EDGAR
Emissions Database for Global Atmospheric Research
EF
extended facility
EGU
electric generation unit
EIL
entrainment interfacial layer
ELP
evaporated liquid particle
EMEX
Equatorial Mesoscale Experiment
EML
Environmental Measurements Laboratory (DOE)
ENA
Eastern North Atlantic
ENCORE
ENsemble ClOud Retrieval
ENP/A
Eastern North Pacific/Atlantic
ENSO
El Nino-Southern Oscillation
ENVI
Environment for Visualizing Images
ENVSAT
ESA earth observation satellite (now inactive)
EOF
empirical orthogonal functions
EOL
Earth Observing Laboratory (NCAR)
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.
ER
ecosystem respiration
ERASMUS
Evaluation of Routine Atmospheric Sounding Measurements using Unmanned Systems
ERAST
Environmental Research Aircraft and Sensor Technology (NASA)
ERBE
Earth Radiation Budget Experiment
ERL
Environmental Research Laboratory
ERL (SGP site)
Electronics Repair Laboratory
EROS
earth sciences resources observation systems
ERS-1
European research satellite-1
ESA
European Space Agency
ESFT
exponential sum fitting of transmission (technique)
ESGF
Earth System Grid Federation
ESM
Earth System Modeling (U.S. DOE program)
ESM-SnowMIP
Earth System Model Snow Model Intercomparison Project
ESMValTool
Earth System Model Evaluation Tool
ESRL
Earth System Research Laboratory (NOAA)
ESTAR
electronically scanned thinned array radiometer
ET
evapotranspiration
ETA/EDAS
ETA Data Assimilation System
ETL
Environmental Technology Laboratory
ETM+
enhanced thematic mapper plus
EUROCS
European Project for Cloud Systems Studies
EVS
Earth Venture Suborbital
EWO
Engineering Work Order

F

FAA
Federal Aviation Administration
FAAM
Facility for Airborne Atmospheric Measurements (UK)
FACE
Free-Air Carbon dioxide Enrichment
FASCODE
Fast Atmospheric Signature Code
FASE
FASCODE for the environment
FASINEX
First Air-Sea Interaction Experiment
FASTER
FAst-physics System TEstbed and Research (a BNL project)
FBAP
fluorescent biological aerosol particle
FC
IISCCP Flux Cloud
FCC
fractional cloud cover
FCCSET
Federal Coordinating Council on Science, Engineering, and Technology
FCDP
fast cloud droplet probe
FDDA
four-dimensional data assimilation
FDTD
finite-dimensional data assimilation
FFSSP
fast-forwarding scattering spectrometer probe
FFT
fast Fourier transform
FIA
Forest Inventory and Analysis
FIDO
Field Instrument Deployments and Operations
FIE
first aerosol indirect effect
FIFE
First ISLSCP Field Experiment
FIMS
fast integrating mobility spectrometer
FIRE
First ISCCP Regional Experiment
FLAASH
Fast Line-of-Sight Atmospheric Analysis of Hypercubes
FLRT
flexible, longwave, radiative transfer
FMCW
Frequency Modulated Continuous Wave
FMI
Finnish Meteorological Institute
FONSI
finding of no significant impact
ForestGEO
Forest Global Earth Observatory
FOV
field of view
fps
frames per second
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
FTS
Fourier transform spectrometer
FWHM
full width at half maximum
FY
Fiscal Year
FZL
freezing level

G

GA
Geoscience Australia
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
GAUS
GPS Advanced Upper-Air Sounding System
GAW
Global Atmosphere Watch
GC-ECD
gas chromatograph-electron capture detector
GC-ITMS
gas chromatograph ion trap mass spectrometer
GC-MS
gas chromatograph-mass spectrometer
GCIP
GEWEX Continental-Scale International Project
GCM
General Circulation Model (no longer in use)
GCOS
Global Climate Observing System
GCSS
GEWEX Cloud System Study
GCW
Global Cryosphere Watch
GEBA
global energy balance archive
GECKO-A
Generator of Explicit Chemistry and Kinetics of Organics in the Atmosphere
GEDI
Global Ecosystem Dynamics Investigation
GEISA
Gestion et Etude des Informations Spectroscopiques Atmospheriques
GEM
Global Ecosystem Monitoring network
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
GFED
Global Fire Emissions Database
GFS
Global Forecast System
GIM
geostatistical inverse modeling
GIS
geophysical information system
GISS
Goddard Institute for Space Studies
GIST
GEWEX Integrated System Test
GLACE
Global Land-Atmosphere Coupling Experiment
GLCTS
Global Land Cover Test Site
GLOMAP
an aerosol microphysics model
GMD
Global Monitoring Division
GMS
geostationary meteorological satellite
GMT
Greenwich Mean Time
GNDRAD
ground radiometers on stand for upwelling radiation
GNSS
Global Navigation Satellite System
GOALS
global-ocean-atmosphere-land-system
GOAMAZON
Observations and Modeling of the Green Ocean Amazon
GOES
geostationary operational environmental satellite
GoMACCS
Gulf of Mexico Atmospheric Composition and Climate Study
GOME
Global Ozone Monitoring Experiment
GOSAT
Greenhouse gases Observing SATellite
GPCI
GCSS Pacific Cross-Section Intercomparison
GPM
Global Precipitation Measurement
GPP
gross primary productivity
GPS
global positioning system
GPS RO
global positioning system radio occultation
GRACE
Gravity Recovery And Climate Experiment
GRAMS
ground radiation measurement system
GRDC
Global Runoff Data Center
GRUAN
GCOS Reference Upper-Air Network
GSA
global sensitivity analysis
GSD
geometric standard deviation
GSFC
Goddard Space Flight Center
GSI
Gridpoint Statistical Interpolation
GSM
global spectral model
GSPO
Global Studies Program Office
GSWP3
Global Soil Wetness Project 3
GTS
global telecommunications system
GUI
graphical user interface
GVAP
GEWEX Water Vapor Project
GVAX
Ganges Valley Aerosol Experiment
GVR
G-band (183 GHz) Vapor Radiometer
GVRP
G-band (183 GHz) Vapor Radiometer profiler
GWTSA
gamma-weighed two-stream approximation

H

HAIC-HIWC
High Altitude Ice Crystals-High Ice Water Content Project
HAPEX
Hydrology Atmosphere Pilot Experiment
HARIMAU
Hydrometeorological Array for Interseasonal Variation-Monsoon Automonitoring
HAWKS
HITRAN Atmospheric Workstation
HBL
hurricane boundary layer
HBMI
Howard Beltsville MWR Intercomparison
HDF
Heirarchical Data Format
HDR
high dynamic range
HEPA
high-efficiency particulate air (filter)
HI-SCALE
Holistic Interactions of Shallow Clouds, Aerosols, and Land-Ecosystems
HIAPER
High-performance Instrumented Airborne Platform for Environmental Research
HIPPO
HIAPER Pole-to-Pole Observations
HIRLAM
high-resolution limited area model
HIS
high-resolution interferometer spectrometer
HITRAN
high-resolution transmission
HL
high latitude
HMT
hydrometeorological testbed
HOLODEC
holographic detector for clouds
HOMME
High Order Method Modeling Environment
HONER
hemispherical optimized new radiometer
HOPE
High-Definition Clouds and Precipitation Observational Prototype Experiment
HR
heating rate
HRDL
high-resolution doppler lidar
HRRR
High-Resolution Rapid Refresh
HSFOVR
hemispherical field of view radiometer
HSI
hemispheric sky imager
HSRL
high spectral resolution lidar
HSVD
hydrometeor velocity size detector
HTAP
Hemispheric Transport of Air Pollution emissions inventory
HUCM
Hebrew University of Jerusalem Cloud Model
HULIS
humic-like substances
HUMEX -- I
Humidity Experiment - Infrared
HVPS
high-volume precipitation spectrometer
HYSPLIT
Hybrid Single-Particle Lagrangian Integrated Trajectory

I

IAP
in situ aerosol profile
IARPC
Interagency Arctic Research Policy
IASC-AWG
International Arctic Science Committee-Atmosphere Working Group
IASI
infrared atmospheric sounding interferometer
IASOA
International Arctic Systems for Observing the Atmosphere
IATA
International Air Transport Association
ICA
independent column approximation
ICARTT
International Consortium for Atmospheric Research on Transport and Transformation
ICARUS
Inaugural Campaigns for ARM Research using Unmanned Systems
ICE
Interface Configuration Experiment (no longer in use)
ICECAPS
Integrated Characterization of Energy, Clouds, Atmospheric State, and Precipitation over Summit
ICI
Infrared Cloud Imager
ICL
integrated cloud liquid
ICOS
Integrated Carbon Observation System
ICRCCM
Intercomparison of Radiation Codes in Climate Models
IDASS
integrated data assimilation and sounding system
IDEAS-2011
Instrumentation Development and Education in Airborne Science 2011 (NSF)
IDL
interactive data language
IDP
Instrument Development Program
IEEE
Institute of Electrical and Electronics Engineers
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
IGS
International GNSS Service
IHOP
International H2O Project
IIDC
Instrumentation and Industrial Digital Camera
ILAMB
International Land Model Benchmarking
ILS
instrument line shape
ILW
integrated liquid water
IMB
Infrastructure Management Board
IMG
Interferometric Monitor of Greenhouse Gases
IMMS
Instrument Mentor Monthly Summary
IMPROVE
Interagency Monitoring of Protected Visual Environments (U.S.)
IMR
ice mixing ratio
INDOEX
Indian Ocean Experiment
INP
ice-nucleating particle
INPA
Instituto Nacional de Pesquisas da Amazonia
INPE
Instituto Nacional de Pesquisas Espaciais
INSTAAR
Institute of Arctic and Alpine Research
INTERACT
International Network for Terrestrial Research and Monitoring in the Arctic
IOP
intensive operational period
IPA
independent pixel approximation
IPASRC
International Pyrgeometer and Absolute Sky-scanning Radiometer Comparison
IPC
International Pyrheliometer Comparison
IPCC
Intergovernmental Panel on Climate Change
IPHEX
integrated Precipitation and Hydrology Experiment
IPM
instrument performance model
IPY
International Polar Year
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
ISAR
Infrared Sea Surface Temperature Autonomous Radiometer
ISCCP
International Satellite Cloud Climatology Program
ISDAC
Indirect and Semi-Direct Aerosol Campaign
ISLSCP
International Satellite Land Surface Climatology Project
ISM
Indian Summer Monsoon
ISO
International Organization for Standardization
ISS
integrated sounding system
ISVHE
Intraseasonal Variability Hindcast Experiment
IT
instrument team
ITCZ
intertropical convergence zone
ITEX
International Tundra Experiment or Island Thunderstorm Experiment
ITOP
Intercontinental Transport of Ozone and Precursors experiment
ITPP
International TOVS Processing Package
IVOC
intermediate volatility organic compound
IWC
ice water content
IWP
ice water path
IWV
integrated water vapor

J

JACCS
Japanese Cloud and Climate Study
JAMSTEC
Japanese Marine Science and Technology Center
JASMINE
Joint Air-Sea Monsoon Interaction Experiment
JAXA
Japan Aerospace Exploration Agency
JD
Julian Day
JFD
joint frequency distribution
JISAO
Joint Institute for the Study of the Atmosphere and Ocean
JOSS
Joint Office for Science Support
JPEG
Joint Photographic Expert Group file format
JPL
Jet Propulsion Laboratory (NASA)
JWD
Joss-Waldvogel disdrometer

K

KDE
kernel density equivalent
KF-CuP
Kain--Fritsch cumulus potential
KNMI
Royal Netherlands Meteorological Institute

L

LABLE
Lower Atmospheric Boundary Layer Experiment
LAC
light-absorbing carbon
LACO
Laboratory for Aerosol and Cloud Optics
LAFE
Land-Atmosphere Feedback Experiment
LAI
leaf area index
LAII
land-atmosphere-ice-interactions
Lake-ICE
Lake-Induced Convection Experiment
LAMS
limited area models
LANDSAT-TM
Land Satellite Thematic Mapper
LANL
Los Alamos National Laboratory
LAOC
light-absorbing organic carbon
LARC
Langely Research Center (NASA)
LAS
laser aerosol spectrometer
LASE
Lidar Atmospheric Sensing Experiment
LASIC
Layered Atlantic Smoke Interactions with Clouds
LASSO
LES ARM Symbiotic Simulation and Observation
LBA
Large Scale Biosphere Atmosphere Experiment in Amazonia
LBL
line-by-line
LBLRTM
Line-By-Line Radiative Transfer Model
LBTM
Layered Bispectral Threshold Method
LCL
lifting condensation level
LDN
Lightening Detection Network (U.S.)
LDR
linear depolarization ratio
LE
latent energy
LED
light-emitting diode
LED-CE-DOAS
light-emitting diode cavity-enhanced differential optical absorption spectroscopy
LES
large-eddy simulation
LFC
level of free convection
LH
latent heat
LI
lifted index
LIF
laser-induced fluorescence
LIFT
lidars in flat terrain
LIRAD
lidar/radiometer
LIS
Land Information System
LITE
Lidar In-space Technology Experiment
LLJ
low-level jet
LLNL
Lawrence Livermore National Laboratory
LMB
level of maximum buoyancy
LMS
least median squares
LN
liquid nitrogen
LNA
low noise amplifier
LNB
level of neutral buoyancy
LOD
limit of detection
LPDM
Lagrangian Particle Dispersion Model
LRT
local recommendation team
LRU
lowest replaceable units (spare/replacement parts)
LS3MIP
Land Surface, Snow and Soil Moisture Model Intercomparison Program
LSM
Land Surface Model
LST
Local Standard Time
LTE
local thermodynamic equilibrium
LTER
Long-Term Ecological Research Network
LTS
lower tropospheric stability
LUC
land use category
LUCID
Land-Use and Climate, IDentification of robust impacts
LUE
light use efficiency
LULCC
land use and land cover change
LUMIP
Land Use Model Intercomparison Project
LUT
look up table
LV-OOA
low-volatility oxygenated organic aerosol
LW
longwave
LWC
liquid water content
LWE
liquid water equivalent
LWP
liquid water path
LWR
longwave radiation

M

M-O
Monin-Obukhov
M-PACE
Mixed-Phase Arctic Cloud Experiment
MAC
mass absorption cross-section or mass absorption coefficient
MACC
Monitoring Atmospheric Composition and Climate
MACPEX
Middle Latitude Airborne Cirrus Properties Experiment
MAERI
marine atmospheric emitted radiance interferometer
MAGIC
Marine ARM GPCI Investigation of Clouds
MAGICC
Measurement of Atmospheric Gases Influencing Climate Change
MAM
Model Aerosol Model
MAPR
multiple antenna profile radar
MAPS
mesoscale atmospheric simulator
MAQNET
multi-scale air quality network (no longer in use)
MARCUS
Measurement of Aerosols, Radiation and Clouds over the Southern Oceans
MAS
MODIS airborne simulator
MASC
Multi-Angle Snowflake Camera
MASE
MArine Stratus Experiment
MASRAD
Marine Stratus Radiation Aerosol and Drizzle
MAST
Monterey Area Ship Experiment
MATCH
Model for Atmosphere and Chemical Transport
MAX-Mex
Megacity Aerosol eXperiment - Mexico City
MBL
marine boundary layer
MC3E
Midlatitude Continental Convective Clouds Experiment
MCBH
multiple cloud base height
MCC
mesoscale convective complex
MCE
modified combustion efficiency
MCICA
Monte Carlo Independent Column Approximation
MCIDAS
man-computer interactive data analysis system
MCS
mesoscale convective system
MCTEX
Marine Continental Thunderstorm Experiment
MDF
model-data fusion
MDN
meta data navigator
mdr
minimum detectable radiance
MDS
meta data system
MDTERP
Maryland Terrestrial Radiation Package
ME
modulation efficiency
MED
mass equivalent diameter
MEFO
Manitou Experimental Forest Observatory
MEGAN
Model of Emissions of Gases and Aerosols from Nature
MET
Meteorological Instrumentation at AMF
MFP
mean-free-path
MFR
multi-filter radiometer
MFRIRT
multifilter radiometer and infrared thermometer
MFRSR
multi-filter rotating shadowband radiometer
MHz
megahertz
MICRE
Macquarie Island Cloud and Radiation Experiment
MIP
model intercomparison project
MIR
millimeter-wave imaging radiometer
MIRS
Microwave Integrated Retrieval System
MISR
multi-angle imaging spectrometer
MIZOPEX
Marginal Ice Zone Observations and Processes Experiment
MJO
Madden-Julian Oscillation
MJY
Mellor-Yamada-Janjic (a PBL modeling scheme)
MLS
mid-latitude summer
MLW
mid-latitude winter
MM
mobile mesonet
MM5
mesoscale model 5
MMCR
millimeter wave cloud radar
MMD
mean mass diameter
MMF
multi-scale modeling framework
MMTP
microwave temperature profiler
MNMB
modified normalized mean biases
MOA
memorandum of agreement
MOAS
Microwave Oxygen Absorption Study
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
MOPD
maximum optical path difference
MOPEX
Model Parameter Estimation Experiment
MOPITT
measurements of pollution in the troposphere
MOR
Meteorological Optical Range
MOSAIC
Model for Simulating Aerosol interactions and Chemistry
MOST
Monin-Obukhov similarity theory
MOU
memorandum of understanding
MOZART
Model for Ozone and Related chemical Tracers
MPAS
Model for Prediction Across Scales
MPEG
Moving Picture Expert Group file format
MPEX
Mesoscale Predictability Experiment
MPI
Max Planck Institute
MPIC
Max Planck Institute for Chemistry
MPIR
multi-spectral pushbroom imaging radiometer
MPL
micropulse lidar
MRAS
mesoscale radiatively-induced anvil spreading
MRC
Mission Research Corporation
MRF
medium-range forecast
MRG
mixed Rossby-gravity
MRI
Meteorological Research Institute
MRMS
multi-radar multi-sensor
MRO
maximum-random overlap
MS
marine stratus
MS-DA
Multiscale Data Assimilation
MSG
Meteosat Second Generation
MSL
mean sea level
MSS
multi-spectral scanner
MSSA
multi-channel singular spectral analysis
MsTMIP
Multi-scale Synthesis & Terrestrial Model Intercomparison Project
MSX
Mid-Course Space Experiment
MTP
microwave temperature profiler
MWMFOC
multi-wavelength multifield of view
MWR
microwave radiometer
MWR3C
microwave radiometer, 3-channel
MWRP
microwave radiometer profiler
MWSR
microwave water substance radiometer

N

N-ICE
Norwegian Young Sea Ice Experiment
NAAMES
North Atlantic Aerosols and Marine Ecoystems Study
NAEI
National Atmospheric Emissions Inventory (UK)
NAM
North American Model
NAME
Nocturnal Avian Migration Experiment
NARL
Naval Arctic Research Laboratory
NARR
North American Regional Reanalysis
NASA
National Aeronautics and Space Administration
NASDA
Japanese National Space Development Agency
NATO
North Atlantic Treaty Organization
NBL
nocturnal boundary layer
NBP
net biosphere productivity
NCAR
National Center for Atmospheric Research
NCAS
National Centre for Atmospheric Science (UK)
NCDC
National Climatic Data Center
NCEP
National Centers for Environmental Prediction
NDACC
Network for the Detection of Atmospheric Composition Change
NDNR
normalized differences of nadir reflectivity
NDVI
Normalized Difference Vegetation Index
NEAQS
New England Air Quality Study
NEAX
Northeast Aerosol Experiment
NEE
net ecosystem exchange
NEI
National Emissions Inventory (U.S. EPA)
NEON
National Ecological Observatory Network
NEP
noise equivalent power or net ecosystem production
NEPA
National Environmental Policy Act of 1969
NERC
National Environment Research Council (UK)
NERSC
National Energy Research Scientific Computing Center (DOE)
NESDIS
National Environmental Satellite, Data, and Information Service
NetCDF
Network Common Data Form
NEXRAD
next-generation radar
NFOV
narrow field of view
NGA
National Geospatial-Intelligence Agency
NGEE
Next-Generation Ecological Experiment or Next-Generation Ecosystem Experiments
NGS
National Geodetic Survey
NIEHS
National Institute of Environmental Health Sciences
NIES
Nauru Island Effect Study
NIGEC
National Institute for Global Environmental Change
NILU
Norwegian Institute of Air Research
NIMFR
normal incidence multifilter radiometer
NIP
normal incidence pyrheliometer
NIPA
nonlocal independent pixel approximation
NIR
near infrared
NIST
National Institute of Standards and Technology
NLCD
National Land Cover Dataset
NMASS
nucleation mode aerosol size spectrometer
NMC
National Meteorological Center
NMVOC
non-methane volatile organic compound
NNLS
non-negative least squares
NOA
nitrogen-enriched organic aerosol
NOAA
National Oceanic and Atmospheric Administration
NOCS
National Oceanography Centre, Southampton (UK)
NORAD
North American Aerospace Defense Command
NPF
new particle formation
NPI
Norwegian Polar Institute
NPOL
NASA Polerametric radar site in rutherford County, North Carolina
NPP
Net Primary Productivity
NR
noonrefractory
NRB
normalized relative backscatter
NRBC
NCAR radiation bias correction
NRCS
Natural Resources Conservation Service
NREL
National Renewable Energy Laboratory
NSA
North Slope of Alaska
NSA/AAO
North Slope of Alaska and Adjacent Arctic Ocean
NSB
North Slope Borough
NSE
Nash-Sutcliffe Efficiency
NSERC
Natural Sciences and Engineering Research Council (Canada)
NSF
National Science Foundation
NSIDC
National Snow and Ice Data Center
NSSL
National Severe Storms Laboratory
NTBC
narrow-to-broadband-conversion
NTP
Network Time Protocol
NWO
Netherlands Organization for Scientific Research
NWP
numerical weather prediction
NWS
National Weather Service

O

OAII
Ocean-Atmosphere-Ice-Interactions
OAP
optical array probe
OASIS
Ocean-Atmosphere-Sea-Ice-Snow experiment
OC
organic carbon
OCO
Orbiting Carbon Observatory
OCS
Oklahoma Climatological Society
OD
optical depth
ODE
ozone depletion event
ODEQ
Oklahoma Department of Environmental Quality
ODS
ozone-depleting substance
OFR
oxidation flow reactor
OGP
Office of Global Programs
OIN
other inorganic material
OKM
Oklahoma Mesonet
OLR
outgoing longwave radiation
OLYMPEX
Olympic Mountain Experiment
OM
organic matter
OMAERUV
OMI/Aura Aerosol Optical Thickness & Single Scattering
OMB
Office of Management and Budget
OMT
ortho-mode transducer
OMWOG
Oceans-based Measurements Working Group
ONR
Office of Naval Research
OPAC
Optical Properties of Aerosols and Clouds software packag
OPC
optical particle counter
ORG
optical rain gauge
ORNL
Oak Ridge National Laboratory
ORR
Operational Readiness Review
OSS
Operations Status System
OSSE
observation simulation system experiments
OSU
Oklahoma State University

P

PA
photoacoustic
PABSI
profiling oxygen A-band spectrometer/visible integer
PAH
polycyclic aromatic hydrocarbon
PalEON
Paleo-Ecological Observatory Network
PALMS
particle analysis by laser mass spectrometry
PALS
Protocol for the Analysis for Land Surface models
PAM
portable automated mesonet
PAR
Photosynthetically active radiation
PARSL
Pacific Northwest National Laboratory\'s Atmospheric Remote Sensing Laboratory
PartMc-MOSAIC
Particle Monte Carlo-Model for Simulating Aerosol Interactions and Chemistry
PASS
Parameterization of Subgrid Scale
PAX
photoacoustic extinctiometer
PBL
planetary boundary layer
PCASP
passive cavity aerosol spectrometer probe
PCI
pressure control inlet
PCMDI
Program for Climate Model Diagnosis and Intercomparison
PCN
Permafrost Carbon Network
PCP
programmable compressor package
PCTM
Parameterized Chemical Transport Model
PCVI
pumped counterflow virtual impactor
PDF
probability distribution function or Portable Document Format
PDL
polarization diversity lidar
PDR
Preliminary Design Review
PEEX
Pan Eurasian Experiment
PFT
plant functional type
PGS
Precision Carbon Dioxide Mixing Ratio System or precision gas system
PHI
probabilistic hazard information
PI
principal investigator
PI-Neph
Polarized Imaging Nephelometer
PID
particle identification algorithm
PIF
problem identification form
PIP
Particle Imaging Package (NASA)
PIR
precision infrared radiometer
PIRAQ
PC-integrated acquisition system
PISA
PECAN Integrated Sounding Array
PMEL
Pacific Marine Environmental Laboratory
PMF
Positive Matrix Factorization
PML
perfectly matched layer
PMO
Pico Mountain Observatory
PMS
particle measuring system
PNG
Portable Network Graphics file format or Papua New Guinea
PNNL
Pacific Northwest National Laboratory
POA
primary organic aerosol
POC
particulate organic carbon
POES
polar orbiting environmental satellite
POPS
printed optical particle spectrometer
PPA
plane parallel approximation
PPP
point-to-point protocol
PRB
Problem Review Board
PRF
pulse repetition frequency
PROBE
Pilot Radiation Observation Experiment
PROF
profile
PRP
Portable Radiation Package
PRR
pre-readiness review
PSAP
particle/soot absorption photometer
PSD
particle size distribution
PSL
photo-stimulated luminescence
PSP
precision spectral pyranometer
PSU
Pennsylvania State University
PTR-MS
proton transfer reaction mass spectrometer
PV
potential vorticity
PW
precipitable water
PWGA
population-weighted global average
PWS
present weather sensor
PWV
precipitable water vapor
PX
Pleim-Xiu model

Q

QC
Quality Control
QME
Quality Measurement Experiment

R

R/V
research vessel
re
effective radius
RACORO
Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations
RAD
Radiation Measurements at AMF
RADAGAST
Radiative Divergence using AMF, GERB and AMMA Stations
RAM
random access memory
RAMIX
Radon Measurements of Atmospheric Mixing
RAMS
regional atmospheric modeling system
RAOB
radiosonde observation
RAPRAD
rapid radiation transfer model
RASS
radio acoustic sounding system
RAW
data file created by an instrument
RBF
radial basis function
RBL
remote balloon launching
RCC
radiometer calibration and characterization
RCCL
Royal Caribbean Cruise Lines
RCF
radiometer calibration facility
RCS
remote cloud sensing
REBS
radiation energy balance system
RegCM2
regional climate model, Version 2 (NCAR)
RESET
Regional Service Team (TWP)
RF
radio frequency
RFA
radiative flux analysis
RGA
reduction gas analyzer
RH
relative humidity
RHI
range-height indicator
RHUBC
Radiative Heating in Underexplored Bands Campaign
RHUBC-II
Radiative Heating in Underexplored Bands Campaign, Phase II
RICO
Rain in Cumulus over the Ocean
RINEX
Receiver Independent Exchange Format
RISC
Russian Ice Station Comparison
RISCAM
Routine In Situ Cloud and Aerosol Measurements
RL
Raman lidar
RMA
reduced-major-axis
RMM
real-time multivariate MJO
rms
root mean square
RMSE
root-mean-square error
ROCS
Rocky Mountain Organic Carbon Study
ROM
rough order of magnitude
RoMBAS
Rocky Mountain Biogenic Aerosol Study
RONOCO
Role of Night-time chemistry in controlling the Oxidising Capacity Of the atmosphere (U.K. university project)
ROSR
remote ocean surface radiometer
RPA
remotely piloted aircraft
RPH
roll, pitch, and heave
RPV
remotely piloted vehicles
RRC
rainfall-rate criteria
RRM
regionally refined model
RRTM
rapid radiative transfer model
RSMAS
Rosenstiel School of Marine and Atmospheric Science
RSP
research scanning polarimeter
RSS
rotating shadowband spectroradiometer
RT
radiative transfer
RTA
residence time analysis
RTD
resistive temperature device or resistance temperature detector
RUC
rapid update cycle
RWP
radar wind profiler

S

SABL
scanning aerosol backscatter lidar
SABLE
Surface Atmospheric Boundary Layer Experiment
SAC
Site Advisory Committee
SAGE
Stratospheric Aerosol and Gas Experiment
SAIC
Science Application International Corporation
SAM
Sun and Aureole Measurement or System for Atmospheric Modeling
SAMEX
Storm and Mesoscale Ensemble Experiment
SAON
Sustaining Arctic Observing Networks
SAPRC
Statewide Air Pollution Research Center (University of California)
SAR or search and rescue
synthetic aperture radar
SARB
Surface and Atmospheric Radiation Budget
SAS
sub-arctic summer
SAW
sub-arctic winter
SBD
short-burst data
SBIR
Small Business Innovation Research (grant)
SBJ
Sierra Barrier Jet
SBL
stable boundary layer
ScaRaB
Scanner for Radiation Budget
SCCN
size-resolved cloud condensation nuclei
SCM
single-column model
SCNNLS
smoothness constrained non-negative least squares
SCOPE
San Clemente Ocean Probing Experiment
SDS
site data system
SEAC4RS
Studies of Emissions and Atmospheric Composition, Clouds, and Climate Coupling by Regional Surveys
SEARCH
Study of Environmental Arctic Change
SEM
scanning electron microscopy
SESI
Science and Engineering Services, Inc.
SGP
Southern Great Plains
SHAVE
Severe Hazard Analysis and Verification Experiment
SHAWMS
Soil Heat And Water Measurement System
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
SIROS
solar and infrared observing system
SIRS
Solar Infrared Station
SIRTA
Site Instrumental de Recherche par Teled'etrection Armospherique
SISC
Science and Infrastructure Steering Committee
SIST
solar-infrared split-window technique
SITAC
Spectral Imagery Technology Applications Center
SKYRAD
sky radiometers on stand for downwelling radiation
SL
stable precipitation over land
SLR
scanning Raman lidar
SMART-R
Shared Mobile Atmospheric Research and Teaching Radar
SMEAR
Station for Measuring Ecosystem-Atmosphere Relations
SMET
Surface Meteorological Instruments for TWP
SMOS
Surface Meteorological Observing Station
SNACS
Studies of the Northern Alaskan Coastal System
SNEX
Snowfall Experiment (BAECC)
SNICAR
Snow, Ice and Aerosol Radiation model
SNL
Sandia National Laboratories
SNR
signal-to-noise ratio
SOAG
semivolatile organic gas-phase species
SoCAB
Southern California Air Basin
SOCCR
State of the Carbon Cycle Report
SOL
site operations log
*Now known as metadata system (MDS)
SOPAC
South Pacific Applied Geoscience Commission
SORTI
solar radiance transmittance interferometer
SOS
Southern Oxidants Study
SOW
statement of work
SP-AMS
Soot Photometer--Aerosol Mass Spectrometer
SP2
single particle soot photometer
SPA
Storm-penetrating aircraft
SPADE
Separate Physics and Dynamics Experiment
SPARC
Space Science and Engineering Center Portable Atmospheric Research Center
SPARTICUS
Small Particles in Cirrus
SPECTRE
Spectral Radiance Experiment
SPIE
Society of Photo-optic Instrumentation Engineers
SPLAT
single-particle mass spectrometer
SPM
site program manager
SPN
sunshine pyranometer
SPREP
South Pacific Regional Environmental Program
SPRGN
South Pacific Regional GPS Network
SRB
surface radiation budget
SRDB
solar radiation dry bias
SRRB
Surface Radiation Research Branch (NOAA)
SS
supersaturation
SSA
single-scattering albedo or sea spray aerosol
SSEC
Space Science and Engineering Center
SSFR
solar spectral flux radiometer
SSM/I
special sensor microwave/imager
SSP
scanning spectral polarimeter
SSST
sea surface (skin) temperature
SST
sea-surface temperature
SSURGO
Soil Survey Geographic (database)
StaBLE
Stable Boundary Layer Education
STAC
size-to-area conversion
START08
Stratosphere-Troposphere Analyses of Regional Transport 2008
STEC
Science Team Executive Committee (no longer in use)
STILT
Stochastic Time-Inverted Lagrangian Transport
STORM-FEST
Stormscale Operational Research and Meteorology Fronts Experiment Systems Test
STORMVEX
Storm Peak Lab Cloud Property Validation Experiment
STXM/NEXAFS
scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy
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
SV-OOA
semi-volatile oxygenated organic aerosol
SV-TAG
semi-volatile thermal desorption aerosol gas chromatograph
SVD
singular value decomposition
SVOC
semi-volatile organic compound
SW
shortwave
SWATS
soil water and temperature system
SWIR
shortwave infrared
SWR
shortwave radiation
SWS
shortwave spectroradiometer
SWV
slant water vapor
SZA
solar zenith angle

T

TAB
total attenuated backscattering
TAMU
Texas A&M University
TAO
Tropical Atmosphere Ocean
TAR
Tape ARchive
TARFOX
Tropospheric Aerosol Radiative Forcing Observational Experiment (1996)
TAS
true air speed
TB
tar balls
TBS
tethered balloon system
TC-RSR
thin-cloud rotating shadowband radiometer
TCAP
Two-Column Aerosol Project
TCCON
Total Carbon Column Observing Network
TCIP
Transit Communications Interface Profiles
TD
thermodenuder
TD-LIF
thermal dissocation laser-induced fluorescence
TDDR
total direct diffuse radiometer
TDL
Tactical Data Link
TDLAS
tunable diode laser absorption spectrometer
TDMA
time division multiple access (from ARM acronym list); also tandem differential mobility analyzer
TEC
thermoelectric cooler
TEJ
tropical easterly jet
TEM
transmission electron microscope
TES
tropospheric emission spectrometer or thermal emission sounder or Terrestrial Ecosystem Science
TexAQS
Texas Air Quality Study
THOR
Thickness from Offbeam Returns
THORPEX
The Observing System Research and Predictability Experiment (no longer in use)
THWAPS
temperature, humidity, winds, and pressure system
TICFIRE
Thin Ice Clouds in Far IR Experiment
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
trace organic gas analyzer
TOGA-COARE
Tropical Ocean Global Atmosphere-Coupled Ocean Atmosphere Response Experiment
TOMS
total ozone mapping experiment spectrometer
TOPAZ
tunable ozone profiler for aerosol and ozone
TOVS
TIROS operational vertical sounder
TP
temperature profiling
TPS
total precipitation sensor
TRAC
time-resolved aerosol collector
TRI
Toxic Release Inventory (U.S. EPA)
TRL
technology readiness level
TRMM
Tropical Rainfall Measuring Mission
TRMM-KWAJEX
Tropical Rainfall Measuring Mission-Kwajalein Experiment
TROA
time-resolved optoacoustic (cell)
TSBR
total broadband radiometer
TSI
total sky imager
TSP
total suspended particles
TTL
tropical tropopause layer
TUVR
total ultraviolet radiometer
TWC
total water cloud
TWP
Tropical Western Pacific
TWP-ICE
Tropical Warm Pool International Cloud Experiment
TWST
three-waveband spectrally agile technique
TWT
traveling wave tubes
TWTA
Traveling Wave Tube Amplifier

U

UAS
unmanned aerial system
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
UEA
Universidade do Estado do Amazonia
UHMA
University of Helsinki Multicomponent Aerosol model
UHSAS
ultra-high-sensitivity aerosol spectrometer
UIC
Ukpeagvik Iñupiat Corporation
UIF
UAV interim flight
UIR
upwelling infrared radiometer
UMBC
University of Maryland, Baltimore County
UMR
unit mass resolution
UNAVCO
University NAVSTAR Consortium
UNESCO
United Nations Education, Scientific, and Cultural Organization
UNICON
unified convective scheme
UPS
uninterruptable power supply
URIP
University Research Instrumentation Program
URL
Uniform Resource Locator
USB
Universal Serial Bus
USCG
United States Coast Guard
USDA
U.S. Department of Agriculture
USGCRP
U.S. Global Change Research Program
USGS
U.S. Geological Survey
USN
U.S. Navy
USP
Universidade de Sao Paulo
USR
upwelling solar radiation
UT
upper troposphere
UV
ultraviolet
UVB
ultraviolet B
UVRL
ultraviolet Raman lidar
UVSR
ultraviolet spectral radiometer
UW-SSEC
University of Wisconsin Space Science and Engineering Center

V

VAD
velocity-azimuth display
VAMOS
Variability of the American Monsoon System
VAP
value-added product
VBS
volatility basis set
VCEIL
Vaisala ceilometer
VDA
variational data assimilation
VDM
vegetation demographic model
VFR
volume fraction remaining or visual flight rules
VGA
video graphics array
VIP
video integrator processor
VIPS
video ice particle sampler
VIRS
visible infrared scanning radiometer
VIS
visible or visible satellite imagery
VISST
visible infrared solar-infrared split-window technique
VMR
volume mixing ratio
VOC
volatile organic carbon or volatile organic compound
VOCALS
VAMOS Ocean-Cloud-Atmosphere-Land Study
VOCAR
variation of coastal atmospheric refractivity
VPD
vapor pressure deficit
VPN
virtual private network
VSMOW
Vienna Standard Mean Ocean Water
VTLC
video time-lapsed camera
VUV
vacuum ultraviolet
VZA
viewing zenith angle

W

WACR
w-band ARM cloud radar
WAIS
West Antarctic Ice Sheet
WCB
warm conveyor belt
WCL
Wyoming cloud lidar
WCPC
water-based condensation particle counter
WCR
Wyoming cloud radar
WCRP
World Climate Research Programme
WDCA
World Data Center for Aerosols
WFOV
wide field of view
WHOI
Woods Hole Oceanographic Institution
WISG
World Infrared Standard Group
WISP
Winter Icing and Storms Project
WISPAR
Winter Storms and Pacific Atmospheric Rivers
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
WSOC
water-soluble organic compound
WSR-88D
weather surveillance radar-88 Dopplers
WTG
weak temperature gradient
WV
water vapor
WVP
water vapor profiling
WVR
water vapor radiometer
WWRP
World Weather Research Programme
WWW
World Weather Watch

X

X-SAPR
X-Band Scanning ARM Precipitation Radar
XBT
expendable bathythermograph
XDC
External Data Center (ARM)
XPIA
Experimental Measurement Campaign: Planetary boundary layer Instrumentation Assessment

Y

YES
Yankee Environmental Systems
YOPP
Year of Polar Prediction
YOTC
Year of Tropical Convection

Z

ZPW
Zero Power Warming experiment
ZSS
Zvenigorod Scientific Station
ZTD
zenith total delay
ZWD
zenith wet delay