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CSIRO GASLAB - CO2O18 Carbon Dioxide Isotope Analysis datasets - Global Atmospheric Sampling Laboratory - Flask Sampling Network

Created 25/06/2025

Updated 25/06/2025

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The CSIRO Global Atmospheric Sampling Laboratory (GASLAB) Flask Sampling Network archive for the oxygen 18 isotope (O18) of atmospheric trace gas carbon dioxide (CO2) concentrations. GASLAB principally analyzes air samples that have been captured at eleven fixed geographic sites and one moving (aircraft over bass strait and Cape Grim), but also includes other sites at various locations globally on a less regular or as needed basis. The CO2O18 measurements are made by concentrating the CO2 from the air sample utilising a 3 step automated cryogenic trapping system connected to a dual inlet stable isotope ratio mass spectrometer (Finnigan MAT252) for analysis. The CO2 and N2O gas chromatography concentrations data for the sample are used for ion corrections on the stable isotope measurements. Alternatively the Cape Grim in situ air sample (cia) which has already had the trapping process applied to it on site, uses the data from the Cape Grim in situ CO2 analyser, with the N2O concentration determined by interpolation from the CSIRO global flask network data. There are 6 differant types of flask that are used to store and transport air samples from site and in the labratory:(i) glass 0.5 litre ("G050"), (ii) glass 5.0 litre ("G500"), (iii) glass 0.8 litre ("G080"), (iv) electropolished stainless steel 1.6 litre "Sirocans" ("S160"), (v) glass 2.0 litre, 1 stopcopck ("F", "FF", "FA", "FE", "EP", ALT"), (vi) glass 2.0 litre, 2 stopcocks(“M1”, “S”, “P2”, “TEMP”). Files containing a single species value for each sample are denoted by a filename of the form (XXX_XXXX_event.XXX), for the geographically fixed sites data is also provided in the form of monthly means (e.g. XXX_XXXX_mm.XXX) with all files being in ascii format.

Files and APIs

Additional Info

Field Value
Title CSIRO GASLAB - CO2O18 Carbon Dioxide Isotope Analysis datasets - Global Atmospheric Sampling Laboratory - Flask Sampling Network
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/d4e8bd3d-8bff-45d4-a21b-5f213430b46e
Contact Point
CSIRO Marlin Data Catalogue
Colin.Allison@csiro.au
Reference Period 01/01/1990
Geospatial Coverage
Map data © OpenStreetMap contributors
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Data Portal CSIRO Marlin

Data Source

This dataset was originally found on CSIRO Marlin "CSIRO GASLAB - CO2O18 Carbon Dioxide Isotope Analysis datasets - Global Atmospheric Sampling Laboratory - Flask Sampling Network". Please visit the source to access the original metadata of the dataset:
https://marlin.csiro.au/geonetwork/srv/eng/csw/dataset/csiro-gaslab-co2o18-carbon-dioxide-isotope-analysis-datasets-global-atmospheric-sampling-labora