A seasonal comparison of ozone photochemistry in the remote marine boundary layer.

During the Austral winter of 1995, a series of measurements were made as part of the Southern Ocean Atmospheric Photochemistry Experiment-1 (SOAPEX-1) campaign at the Cape Grim Baseline Air Pollution station (41°S) on the northwestern tip of Tasmania, Australia. The measurements were complimentary to similar ones made in the Austral summer during January–February 1995 and both sets of data are used to make a comparison of photochemistry in the remote marine boundary layer in summer and winter. Seasonal measurements of peroxy radicals are compared to both a steady-state analysis and a full model in order to elucidate their relationships to measured O3, Full-size image (