Enhanced lifetime of methane bubble streams within the deep ocean

Details Enhanced lifetime of methane bubble streams within the deep ocean Enhanced lifetime of methane bubble streams within the deep ocean

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29o..21r&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 15, pp. 21-1, CiteID 1731, DOI 10.1029/2001GL013966

Mathematics

Logic

26

Oceanography: Biological And Chemical: Gases, Oceanography: Biological And Chemical: Carbon Cycling, Marine Geology And Geophysics: Marine Sediments-Processes And Transport

Scientific paper

We have made direct comparisons of the dissolution and rise rates of methane and argon bubbles experimentally released in the ocean at depths from 440 to 830 m. The bubbles were injected from the ROV Ventana into a box open at the top and the bottom, and imaged by HDTV while in free motion. The vehicle was piloted upwards at the rise rate of the bubbles. Methane and argon show closely similar behavior at depths above the methane hydrate stability field. Below that boundary (~520 m) markedly enhanced methane bubble lifetimes are observed, and are attributed to the formation of a hydrate skin. This effect greatly increases the ease with which methane gas released at depth, either by natural or industrial events, can penetrate the shallow ocean layers.

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