The distribution of 226Ra in the Atlantic Ocean

Details The distribution of 226Ra in the Atlantic Ocean The distribution of 226Ra in the Atlantic Ocean

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..32..220b&link_type=abstract

Earth and Planetary Science Letters, Volume 32, Issue 2, p. 220-235.

Physics

11

Scientific paper

Based on results obtained during the GEOSECS program the primary features of the distribution of 226Ra in the Atlantic Ocean can be defined. Outside the Antarctic no significant variation has been found in the 226Ra content of surface waters. Eighty samples yield an average of 7.4 dpm/100 kg (normalized to a salinity of 35.00‰). Deep waters in the central Atlantic have 226Ra contents several dpm/100 kg higher than expected from the mixing of Antarctic Bottom Water (21.3 dpm/100 kg) and basal North Atlantic Deep Water (10.3 dpm/100 kg). These excesses correlate well with deficiencies in O2 and excesses in SiO2. The intermediate water 226Ra maximum in the South Atlantic is associated with the inflow of low-oxygen Circumpolar Intermediate Water beneath the Antarctic Intermediate Water.

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