ABLE Atmospheric Boundary Layer Experiments

ACTO Atmospheric Chemistry and Transport of Ozone

AIRS Atmospheric Infrared Sounder

AQS Air Quality Standards

ATOFMS aerosol-time-of-flight mass spectrometry

CAA Clean Air Act

CAIR Clean Air Interstate Rule

CALIPSO Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations

CAMNET Canadian Atmospheric Mercury Network

CAMR Clean Air Mercury Rule

CARIBIC Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container

CASTNET Clean Air Status and Trends Network

CCM chemistry-climate model

CTM chemical transport model

DI dry air intrusion

EA East Asia

EANET Acid Deposition Monitoring Network in East Asia

EDGAR Emissions Database for Global Atmospheric Research

EI emissions inventory

STET European Monitoring and Evaluation Programme

EOS Earth Observing System

EPA U.S. Environmental Protection Agency

ERS-2 European Remote Sensing satellite 2

ESRL Earth System Research Laboratory

EU European Union

EXPORT European eXport of Precursors and Ozone by long-Range Transport

FDDA four-dimensional data assimilation

FOC fluorinated organic chemical

GAW Global Atmosphere Watch

GEMS Global and regional Earth-system (Atmosphere) Monitoring using Satellite and insitu data

GEOS Goddard Earth Observing System

GHG greenhouse gas

GOME Global Ozone Monitoring Experiment

HTAP-TF Task Force on Hemispheric Transport of Air Pollution

IADN Integrated Atmospheric Deposition Network

IASI Infrared Atmospheric Sounding Interferometer

ICARTT International Consortium for Atmospheric Research on Transport and Transformation

IGAC International Global Atmospheric Chemistry

IGACO Integrated Global Atmospheric Chemistry Observations

IGOS Integrated Global Observing Strategy

IMPROVE Interagency Monitoring of Protected Visual Environments

INTEX-NA Intercontinental Chemical Transport Experiment-NorthAmerica

IPCC Intergovernmental Panel on Climate Change

ITCT Intercontinental Transport and Chemical Transformation

ITCZ Intertropical Convergence Zone

ITOP Intercontinental Transport of Pollution

LDAR Light Detection and Ranging

LRT long-range transport

LRTAP Long Range Transport of Air Pollutantion

LSM Land surface model

MAXOX Maximum oxidation rates in the free troposphere

MCS mesoscale convective system

MDA8 maximum daily 8-hour average

MDN/AMI Mercury Deposition Network/Atmospheric Mercury Initiative

METAALICUS Mercury Experiment to Assess Atmospheric Loading in Canada and the U.S.

MLS Microwave Limb Sounder

MODIS Moderate Resolution Imaging Spectroradiometer

MOPITT Measurements of Pollution in the Troposphere

MOZAIC Measurements of OZone, water vapor, carbon monoxide and nitrogen oxides by in-service AIrbus airCraft

MOZART Model for Ozone and Related Tracers

NA North American

NAAQS National Ambient Air Quality Standards

NARE North Atlantic Regional Experiment

NARSTO North American Research Strategy for Tropospheric Ozone

NASA National Aeronautics and Space Administration

NEAQS New England Air Quality Study

NEXAFS Near-edge X-ray Absorption Spectroscopy

NH Northern Hemisphere

NMHC nonmethane hydrocarbon

NMVOC nonmethane volatile organic compounds

NOAA National Oceanic and Atmospheric Administration

NOXAR Measurements of Nitrogen Oxides and Ozone Along Air Routes

NRC National Research Council

NSF National Science Foundation

OCP organochlorine pesticide

OMI Ozone Monitoring Instrument

PAH polycyclic aromatic hydrocarbon

PBDE polybrominated diphenyl ethers

PBL planetary boundary layer

PCDD/Fs polychlorinated dibenzo-p-dioxins and furans

PEM-West Pacific Exploratory Mission-West

PFCA perfluorinated carboxylic acid

PFOA perfluorooctanoic acid

PHOBEA Photochemical Ozone Budget of the Eastern North Pacific Atmosphere

PM particulate matter

POLARCAT Polar Study using Aircraft, Remote Sensing, Surface Measurements and Models of Climate Chemistry, Aerosols and Transport

POLINAT Pollution from Aircraft Emissions in the North Atlantic Flight Corridor

POP persistent organic pollutant

PRB policy relevant background

PSD Prevention of Significant Deterioration

RAINS Regional Air Pollution Information and Simulation

RGM Reactive Gaseous Mercury

RF Radiative forcing

S-R source-receptor

SA South Asia

SCIAMACHY Scanning Imaging Absorption Spectrometer for Atmospheric CHartographY

SH Southern Hemisphere

SOAs secondary organic aerosols

SONEX subsonic assessment ozone and nitrogen oxide experiment

SRES Special Report on Emissions Scenarios

STM Scanning tunneling microscopy

TCO tropospheric column ozone

TES Tropospheric Emission Spectrometer

TMDL Total Maximum Daily Load

TOMS Total Ozone Mapping Spectrometer

TOPSE Tropospheric Ozone Production about the Spring Equinox

TRACE-P Transport and Chemical Evolution over the Pacific

TTN Technology Transfer Network

UNEP United Nations Environment Programme

UNECE United Nations Economic Commission for Europe

UNFCCC U.N. Framework Convention on Climate Change

VOC volatile organic compound

WCB warm conveyor belt

WHO World Health Organization

WMO World Meteorological Organization