1. B. F. Moffett (), Ocean Lab, Fishguard Harbour, The Parrog, Goodwick, Pembrokeshire, SA64 0DE, UK
2. G. Getti, School of Science, Univ. of Greenwich, Chatham ME4 4TB, UK.
3. S. K. Henderson-Begg, PricewaterhouseCoopers LLP, 7 More London Riverside, London SE1 2RT, UK.
4. T. C. J. Hill, Dept of Atmospheric Science, Colorado State University, Fort Collins, CO 80523-1371, USA.