DISTRIBUTION OF RA-226 IN THE ROSS-SEA - ANTARCTICA

An improved procedure for the determination of Rn-222 and Ra-226 in se awater developed for easier on-board operations is presented. Data on the radioactive disequilibrium between the mentioned radionuclides as directly determined in the field can be greatly helpful in the study o f the gas-exchange processes at the air-sea interface, especially as f ar as the Antarctic Ocean is concerned. The method employed has been p reliminarly tested in laboratory on a set of seawater samples collecte d in the Ross Sea and Ra-226 data collected are discussed and compared to literature data.