The CSIRO archive of observed atmospheric CO2 concentrations at the Cape Grim Baseline Air Pollution Station in North-West Tasmania, measured with the CSIRO developed LOFLO & LOFLO Mk2 instruments. LOFLO is an analysis system built around a commercial LI-COR 6251 optical bench which utilizes NDIR (non-dispersive infrared) gas analysis technology to measure CO2 concentrations in sample air. Consuming smaller volumes of calibration gases (approx. 15ml/min) and requiring much less operator intervention, LOFLO measurements have significantly less bias than traditional NDIR measurement techniques. Measurements using LOFLO began at Cape Grim in May 2000 and has now been expanded to other global stations with the newer improved LOFLO Mk2. Stations using LOFLO include Cape Grim, Maquarie Island, Otways Basin and Aspendale, with logged data available as yearly ascii text files in hourly averaged and minutely averaged periods for CO2 concentration, standard deviation, max & min values as well as a baseline flag. Conditions are considered baseline when wind directions are between 190 & 280°. Typically file size is approximately 500 KB and 12 MB for an hourly averaged and minutely averaged year of data respectively.

The CSIRO archive of observed atmospheric CO2 concentrations at the Cape Grim Baseline Air Pollution Station in North-West Tasmania for the period 1976 until 2004. Measurements of atmospheric CO2 levels began in 1976 and have continued until the present day, giving an unprecedented view of the overall change in CO2 composition over the 30+ year time-frame. These started with the URAS-2T instrument until Jun 1990, continuing with the Siemens Ultramat 5E system until July 2004, followed by the LOFLO Mk2 instrument until the present day. All use NDIR (non-dispersive infrared) analysis techniques with LOFLO being CSIRO developed to make measurements consuming smaller volumes of calibration gas, requiring less operator intervention and having less bias than traditional NDIR measurement techniques. Logged data is available in a single ascii text file in hourly averaged periods containing CO2 concentration, wind speed and direction, a baseline and quality flag. Conditions are considered baseline when wind directions are between 190 & 280° bringing air from the southern ocean. The file size for the given variables is approximately 400 KB for an hourly averaged year of data, with the period from 1976-2004 being approx 11.0 MB.

The CSIRO archive of Cape Grim Baseline Air Pollution Station - Hourly Atmospheric Radon (Rn222) concentration datasets. The Cape Grim Baseline Air Pollution Station facility, located at the North/West tip of Tasmania (40° 41'S, 144° 41'E), is funded and managed by the Australian Bureau of Meteorology, with the scientific program being jointly supervised with CSIRO Marine and Atmospheric Research. The role of the station has been to observe global air quality through the measurements of atmospheric pollution such as carbon dioxide, ozone, halocarbons, oxides of nitrogen, particulates, precipitation chemistry as well as to monitor other parameters such as solar radiation and meteorological variables. This archive contains measurements of atmospheric concentrations of the colorless, naturally occurring, radioactive noble gas Radon (Rn222), that is formed from the decay of radium gas as part of the Australian Nuclear Science and Technology Organisation's (ANSTO) Cape Grim Radon Program. Containing measured atmospheric Radon concentrations for the period from Dec 1986 until Dec 2004. Variable data is available as both an hourly averaged annual file or as a single (all years concatenated) file in Asci (.dat) format with Australian Eastern Standard Time (AEST) time and date formats within each file (Concentrations in calibrated one hour long counts).

The CSIRO archive of the Atmospheric Life Experiment (ALE) datasets which was designed to determine accurately the atmospheric concentrations of the four halocarbons CFCl3, CF2Cl2, CH3CCl3, and CCl4, and also of N2O with emphasis on measurement of their long-term trends in the atmosphere. Comparison of these concentrations and trends for the four halocarbons with estimates of their industrial emission rates then enabled calculations of their global circulation rates and globally averaged atmospheric lifetimes. The ALE project was the precursor of the GAGE (Global Atmospheric Gases Experiment) and thereafter AGAGE (Advanced Global Atmospheric Gases Experiment) global observing system that has been continuously measuring the composition of the atmosphere since. This particular dataset represents measurements taken utilizing automated dual-column electron-capture gas chromatographs which sample the background air about 4 times daily at the following globally distributed sites: Adrigole, Ireland; Cape Meares, Oregon; Ragged Point, Barbados; Cape Matatula, American Samoa; and Cape Grim, Tasmania. Officially ALE ran for the time period from 1978-1981, although data was continued to be logged until 1986 and is available in yearly files either in Ascii (.txt), Ascii decimal date(.dat) or binary file decimal date format(.dat.bin).

The CSIRO archive of the Advanced Global Atmospheric Gases Experiment (AGAGE) datasets. The AGAGE project is part of the powerful global observing system that has been continuously measuring the composition of the atmosphere at high frequency from chosen coastal sites around the world, providing accurate measurements of trace gases whose lifetimes are long compared to global atmospheric circulation times. These particular datasets represent measurements taken with both the original ADS GC-MS system (University of Bristol developed adsorption-desorption preconcentration module) and the more recently (May 2003) developed Medusa (improved cryogenic preconcentration system, Scripps Institution of Oceanography) type of instrumentation. Utilising these it is possible to accurately measure 43 species of Hydrochlorofluorocarbons, hydrofluorocarbons, methyl halides & halon gases at a 2 hourly (ADS) or hourly (Medusa) frequency. This coupled with the GC-MD dataset covers almost all of the important gas species in the Montreal Protocol (e.g. halocarbons such as bromocarbons, CFCs and HCFCs) to protect the ozone layer and almost all of the significant non-CO2 gases in the Kyoto Protocol (e.g. HFCs, PFCs, methane, and nitrous oxide) to mitigate climate change. AGAGE is the expansion and continuation of the Atmospheric Life Experiment(ALE) 1978-1981 and the Global Atmospheric Gases Experiment(GAGE) 1981-1985. Participating AGAGE stations include Cape Grim (Tasmania), Mace Head (Ireland), Ragged Point (Barbados), Cape Matatula (Samoa) & Trinidad Head (California), with urban stations at SIO (La Jolla, California) and CMAR(Aspendale, Australia). Data is available in yearly files either in Ascii (.C), Ascii decimal date(.C.Dat) or binary file format(.bin). It is also available in a processed form (Courtesy of the Georgia Institute of Technology) to include a Polluted data flag in the decimal date version only. AGAGE also collaborates with the System for Observation of Halogenated Greenhouse Gases in Europe (SOGE), through transfer of AGAGE calibrations and sharing of AGAGE technology, placing AGAGE and SOGE data on common calibration scales with comparable precisions, accuracy and measurement frequency. Soge contributing stations are Monte Simone (Italy), Jungfraujoch (Switzerland), & Ny-Alesund-zeppelin (Norway). AGAGE's network also includes Hateruma Island Japan through a co-operative agreement with the Japanese National Institute for Environmental Studies (NIES). The other two collaborative stations are at Shangdianzi, China and Gosan, Jeju Island, South Korea. Shangdianzi started measuring ozone-depleting trace gases and greenhouses gases in 2006, and is a part of SOGE-A project. The Gosan station, started in late 2007, is operated by Seoul National University (SNU).

The CSIRO archive of the Global Atmospheric Gases Experiment (GAGE) datasets which were designed to determine accurately the atmospheric concentrations of the five halocarbons CFCl3, CF2Cl2, CH3CCl3, CCl4 and CCL2FCCLF2 and also of N2O & CH4 with emphasis on measurement of their long-term trends in the atmosphere. Comparison of these concentrations and trends for the five halocarbons with estimates of their industrial emission rates then enabled calculations of their global circulation rates and globally averaged atmospheric lifetimes. The GAGE project was the continuation and expansion of the ALE (Atmospheric Life Experiment) and precursor to the AGAGE (Advanced Global Atmospheric Gases Experiment) global observing system that has been continuously measuring the composition of the atmosphere since. This particular dataset represents measurements taken utilizing automated dual-column electron-capture gas chromatographs which sample the background air about 12 times daily at the following globally distributed sites: Adrigole, Ireland; Cape Meares, Oregon; Ragged Point, Barbados; Cape Matatula, American Samoa; and Cape Grim, Tasmania. Officially GAGE ran for the time period from 1981-1985, although data was continued to be logged until 1996 and is available in yearly files either in Ascii (.txt), Ascii decimal date(.dat) or binary file decimal date format(.dat.bin).

The CSIRO archive of the Advanced Global Atmospheric Gases Experiment (AGAGE) datasets. The AGAGE project is part of the powerful global observing system that has been continuously measuring the composition of the atmosphere at high frequency from chosen coastal sites around the world, providing accurate measurements of trace gases whose lifetimes are long compared to global atmospheric circulation times. This particular dataset represents measurements taken utilizing GC-MD (Gas Chromatograph Multiple Detector) type of instrumentation which contains Electron Capture Detectors (ECD), Flame Ionization Detector (FID) & Mercuric oxide Reduction Detector (MRD). Utilising these it is possible to accurately measure the five biogenic/anthropogenic gases (CH4,N2O,CHCl3,CO & H2) and five anthropogenic gases (CCl3F, CCl2F2, CH3CCl3, CCl2FCClF2 & CCl4). This coupled with the GC-MS dataset covers almost all of the important trace gas species in the Montreal Protocol (e.g. halocarbons such as bromocarbons, CFCs and HCFCs) to protect the ozone layer and almost all of the significant non-CO2 gases in the Kyoto Protocol (e.g. HFCs, methane, and nitrous oxide) to mitigate climate change. AGAGE is the expansion and continuation of the Atmospheric Life Experiment(ALE) 1978-1981 and the Global Atmospheric Gases Experiment(GAGE) 1981-1985. Participating AGAGE stations include Cape Grim (Tasmania), Mace Head (Ireland), Ragged Point (Barbados), Cape Matatula (Samoa) & Trinidad Head (California), with urban stations at SIO (La Jolla, California) and CMAR(Aspendale, Australia). Data is available in yearly files either in Ascii (.C), Ascii decimal date(.C.Dat) or binary file format(.bin). It is also available in a processed form (Courtesy of the Georgia Institute of Technology) to include a Polluted data flag in the decimal date version only. AGAGE also collaborates with the System for Observation of Halogenated Greenhouse Gases in Europe (SOGE), through transfer of AGAGE calibrations and sharing of AGAGE technology, placing AGAGE and SOGE data on common calibration scales with comparable precisions, accuracy and measurement frequency. Soge contributing stations are Monte Simone (Italy), Jungfraujoch (Switzerland), & Ny-Alesund-zeppelin (Norway). AGAGE's network also includes Hateruma Island Japan through a co-operative agreement with the Japanese National Institute for Environmental Studies (NIES). The other two collaborative stations are at Shangdianzi, China and Gosan, Jeju Island, South Korea. Shangdianzi started measuring ozone-depleting trace gases and greenhouses gases in 2006, and is a part of SOGE-A project. The Gosan station, started in late 2007, is operated by Seoul National University (SNU).

The CSIRO archive of Cape Grim Baseline Air Pollution Station - Hourly Atmospheric Meteorology datasets. The Cape Grim Baseline Air Pollution Station facility, located at the North/West tip of Tasmania (40° 41'S, 144° 41'E), is funded and managed by the Australian Bureau of Meteorology, with the scientific program being jointly supervised with CSIRO Marine and Atmospheric Research. The role of the station has been to observe global air quality through the measurements of atmospheric pollution such as carbon dioxide, ozone, halocarbons, oxides of nitrogen, particulates, precipitation chemistry as well as to monitor other parameters such as solar radiation and meteorological variables. This archive contains hourly measurements of Atmospheric Wind speed and direction at 10 & 50m heights, temperature, humidity, rainfall, atmospheric pressure, number of baseline minutes for the hour, CN counts and carbon dioxide concentrations for the period from Jan 1976 until the present. Variable data is available as both an hourly averaged annual file or as a single (all years concatenated) file in either in Ascii (.dat) or binary (.bin) file format, including both Australian Eastern Standard Time (AEST) time and Co-ordinated Universal Time (UTC=AEST-10hr, also called GMT) time and date formats within each file.