Physics
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..32..357s&link_type=abstract
Earth and Planetary Science Letters, Volume 32, Issue 2, p. 357-370.
Physics
17
Scientific paper
Vertical eddy diffusivities (Kv's) have been estimated at fourteen widely separated locations from fourteen 222Rn profiles and two 228Ra profiles measured near the ocean floor as part of the Atlantic and Pacific GEOSECS programs. They show an inverse proportionality to the local buoyancy gradient [(g/ϱ)(∂ϱpot/∂z)] calculated from hydrographic measurements. The negative of the constant of proportionality is the buoyancy flux [-Kv(g/ϱ)(∂ϱpot/∂z)] which has a mean of -4 × 10-6 cm2/sec3. Our results suggest that the buoyancy flux varies very little near the ocean floor. Kv's for the interior of the deep Pacific calculated from the relationship Kv = (4 × 10-6 cm2/sec3)/[(g/ϱ)(∂ϱpot/∂z)] agree well with published estimates. Kv's calculated for the pycnocline are one to two orders of magnitude maller than upper limits estimated from tritium and 7Be distributions. Heat fluxes calculated with the model Kv's obtained from the 222Rn profiles average 31 μcal cm-2 sec-1 in the Atlantic Ocean and 8 μcal cm-2 sec-1 in the Pacific Ocean.
Bainbridge Arnold E.
Broecker Wallace S.
Feely Herbert W.
Moore Willard S.
Sarmiento Jorge L.
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