Physics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979e%26psl..42...13l&link_type=abstract
Earth and Planetary Science Letters, Volume 42, Issue 1, p. 13-26.
Physics
4
Scientific paper
In the summer of 1975, the half removal time of 228Th by settling particles, tc, was about 11 +/- 4, 29 +/- 8 and 70 +/- 10 days in the shelf surface water, the shelf winter water and the slope surface water of the New York Bight, respectively. In the fall of 1974, tc was about 17 +/- 1 to 28 +/- 2 days from the inner shelf to the outer shelf surface waters and about 70 +/- 10 days in the slope surface water. A simple box model of the shelf water in the Middle Atlantic Bight shows that (1) the exchange rate between the shelf and the slope waters is about 2500 +/- 800 km3/yr, (2) the mean residence time of the shelf water is only about 132 +/- 36 days, and (3) the average 226Ra and 228Ra fluxes per unit area of the coastal sediments are about 0.05 dpm 226Ra/cm2 yr and 0.37 dpm 228Ra/cm2 yr. These rates are consistent with previously reported results. The implication of these rates to pollutants in the coastal environment is discussed.
Feely Herbert W.
Li Yuan-Hui
Santschi Peter H.
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