On Turbulence Production by Swimming Marine Organisms in the Open Ocean and Coastal Waters
On Turbulence Production by Swimming Marine Organisms in the Open Ocean and Coastal Waters
复制标题
关于公海和沿海水域游泳海洋生物产生的湍流
DOI：
10.1175/2010jpo4415.1
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发表时间：
2010
影响因子：
3.5
通讯作者：
J. Dower
中科院分区：
文献类型：
--
作者：
Shani Rousseau;E. Kunze;R. Dewey;K. Bartlett;J. Dower
摘要 在北太平洋亚北极东部海洋站 P 附近和加拿大不列颠哥伦比亚省温哥华岛南端的萨尼奇湾收集了微观结构和声学剖面时间序列，以检查游泳海洋生物产生的湍流消散。在海洋站 P，尽管许多浮游动物物种足够大，足以产生雷诺数 Re > 1000 的湍流，但生物量密度通常小于每立方米 103 个个体（按体积计<0.01%），并且与声学反向散射层相比，湍流动能耗散率 e 与 16 米垂直剪切的相关性更好。在萨尼奇湾，磷虾密度高达每立方米 104 只（按体积计 0.1%），消散率 e 的显着升高与黄昏和黎明声学反向散射层的垂直迁移无关。耗散率是声学中的 2 倍 [<e> = 1.4 × 10−8 W kg−1，对应于浮力 Re = <e>/(νN 2) ∼ 140]...
Abstract Microstructure and acoustic profile time series were collected near Ocean Station P in the eastern subarctic North Pacific and in Saanich Inlet at the south end of Vancouver Island, British Columbia, Canada, to examine production of turbulent dissipation by swimming marine organisms. At Ocean Station P, although a number of zooplankton species are large enough to generate turbulence with Reynolds numbers Re > 1000, biomass densities are typically less than 103 individuals per cubic meter (<0.01% by volume), and turbulent kinetic energy dissipation rates e were better correlated with 16-m vertical shear than acoustic backscatter layers. In Saanich Inlet, where krill densities are up to 104 individuals per cubic meter (0.1% by volume), no dramatic elevation of dissipation rates e was associated with dusk and dawn vertical migrations of the acoustic backscatter layer. Dissipation rates are a factor of 2 higher [〈e〉 = 1.4 × 10−8 W kg−1, corresponding to buoyancy Re = 〈e〉/(νN 2) ∼ 140] in acoustic bac...