[1] ATMOSPHER & ENVIRONM RES INC,CAMBRIDGE,MA 02139
[2] UNIV BRISTOL,DEPT GEOCHEM,BRISTOL BS8 1TS,AVON,ENGLAND
[3] GEORGIA INST TECHNOL,SCH GEOPHYS SCI,ATLANTA,GA 30332
[4] OREGON GRAD CTR,INST ATMOSPHER SCI,BEAVERTON,OR 97006
[5] CSIRO,DIV ATMOSPHER RES,ASPENDALE,VIC 3195,AUSTRALIA