Double-diffusion and the fine structures in the sea

K.K. Varma


Recent data on the variation of temperature and salinity with depth have shown that these parameters do not vary smoothly with depth but have a steppy profile. The effects of different rates of diffusion of heat and salt known as "double-diffusion" is one of the factors that contributes towards these steps in temperature and salinity profiles. Various laboratory results reported in the literature, on double-diffusion have been discussed and conditions responsible for the formation and merging of layers in diffusive system as well as in the finger system have been indicated. Horizontal gradients can also produce double-diffusion and it has been suggested that care should be taken while extending the results of laboratory studies to oceanic environment


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