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Fractal Dimensions of Suspended Particles in Seawater

✍ Scribed by Dubravko Risović; Mladen Martinis

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
130 KB
Volume
182
Category
Article
ISSN
0021-9797

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✦ Synopsis

Situation in the ocean is even more complicated due to Light scattering data measured in various sites ranging from great polydispersity in sizes, shapes, and properties of aggreopen ocean to coastal and harbor waters have been analyzed. The gating particles. Using a dimensional analysis based on fracdependence of scattered light intensity on scattering vector shows tal scaling relationships, Jiang and Logan (11) calculated two distinctive q regions. This I(q) behavior is consistent with the fractal dimensions of aggregates formed in marine systems.

two component model of sea particle size distribution. The average

For aggregates formed from differential sedimentation and particle fractal dimensions estimated from these data are 1.7 { shear coagulation they determined 1.61 £ D £ 2.31 and 2.4 0.1 for small q values (q £ 2.5 mm 01 ) and 2.7 { 0.4 for large £ D £ 3.75, respectively. They were not able to calculate q values. These fractal dimensions correspond to cluster-cluster aggregation of larger (B component) particles due to differential the fractal dimension for aggregates formed from Brownian sedimentation and to shear induced particle-cluster aggregation coagulation by use of the dimensional analysis. However, of smaller (A component) particles. They also agree with the fraccomputer simulations verified experimentally by measuretal properties of microaggregates obtained from the recent simulament of fractal dimensions of a variety of aggregates formed tion of phytoplankton bloom in a mesocosm. ᭧ 1996 Academic Press, Inc.

by Brownian motion indicate 1.8 £ D £ 2.2 (10). Although

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