8d196c60-32de-4767-bfa4-d92d1c9b88f9 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-24T23:34:10 creation ISO 19115 2016 CSIRO GASLAB - CH4 (Methane) Analysis datasets - Global Atmospheric Sampling Laboratory - Flask Sampling Network 8d196c60-32de-4767-bfa4-d92d1c9b88f9 The CSIRO archive of Global Atmospheric Sampling Laboratory (GASLAB) Flask Sampling Network archive for the atmospheric trace gas methane (CH4) 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 flask air sample is analyzed for the 5 atmospheric trace gases Methane (CH4), Carbon Dioxide (CO2), Carbon Monoxide (CO), Hydrogen (H2) and N2O (Nitrous Oxide). Data about the relative concentrations of these are particularly important for global warming studies as CO2 and CH4 are the two most effective anthropogenic greenhouse gases; CO and H2 influencing concentrations of the hydroxyl radical (OH), thereby affecting the main sink for atmospheric CH4. H2 is produced in a sequence of reactions following the reaction of OH with CH4. Measurements of CH4 concentrations are made through the use of 3 Carle gas chromatographs with flame ionisation detection (FID), Carle-1 (C1), Carle-2 (C2) and Carle-3 (C3). 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 stopcock ("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. {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [180.0, -90.0], [180.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]} -180.0 180.0 -90.0 90.0 Data Link documentDigital Externally accessible FTP location (Zip file) HTML Data Link documentDigital Link to CDIAC (Carbon Dioxide Information Analysis Center) homepage HTML Data Link documentDigital Link to WDCGG (World Data Centre for Greenhouse Gases) homepage HTML