A radon-only technique for characterising baseline constituent concentrations at Cape Grim

• Main Authors: Chambers, SD, Williams, A, Crawford, J, Griffiths, AD, Krummel, PB, Steele, LP, Schoot, VD
• Format: Conference Object
• Language: English
• Published: Bureau of Meteorology and CSIRO Oceans and Atmosphere Flagship 2017
• Subjects: Carbon dioxide; Radon 222; Aerosol monitoring; Bases; Concentration ratio; Air; Grim; Southern Ocean
• Online Access: http://apo.ansto.gov.au/dspace/handle/10238/8283

Nine years (2004-2013) of hourly Radon-222, carbon dioxide and ozone concentration observations at Cape Grim are used to assess the residual terrestrial influence on air masses with radon concentrations below the 100 mBq m-3 threshold traditionally used for ‘baseline’ delineation (Figure 1a). Subseq...