Computer Science
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..37...61l&link_type=abstract
Earth and Planetary Science Letters, Volume 37, Issue 1, p. 61-70.
Computer Science
3
Scientific paper
Fine suspended materials in the particle-size range 1 < r < 6 μm (r, equivalent sphere radius) from the equatorial North Atlantic, between the ocean surface and greater depths (30-5100 m), can be consistently described by a size-distribution relationship dN/dr = Ar-b, where the parameters A and b are independent of r. The shape of the particle-size distribution is essentially constant and independent of depth, as reflected in the values of the logarithmic slope of the size distribution b = 4.0 +/- 0.3. The particle-number and mass concentration, however, decrease strongly with depth, most of the decrease taking place in the surface layer 200 m deep. In the surface layer, mass concentration decreases exponentially with the half-concentration depth z1/2 ⋍ 60 m; in the deep layer (200-5000 m), z1/2 ⋍ 1000 m. The computed removal half-lives of the particulate material are 0.8 +/- 0.6 yr in the surface layer, and 60 +/- 20 yr in the deep layer, both half-lives being considerably shorter than Stokes settling residence times. The fast turnover or removal rate in the surface layer is compatible with the rates of zooplankton growth and carbon assimilation.
Betzer Peter R.
Carder Kendall L.
Lerman Abraham
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