The concentration and isotopic composition of greenhouse gases and related species are measured in-situ or by discrete collections at the surface at Baring Head, Wellington (41.42ºS, 174.87ºE); Arrival Heights, Antarctica (77.80ºS, 166.67ºE); and Lauder, Central Otago (45.03ºS, 169.67ºE). These data contribute to the information managed by the World Data Centre for Greenhouse Gases (WDCGG).