Gas Bubbles as Oceanographic Tracers | Zendy

Burkard Baschek | Zendy; David M. Farmer | Zendy

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Gas Bubbles as Oceanographic Tracers

Author(s) -

Burkard Baschek,

David M. Farmer

Publication year - 2009

Publication title -

journal of atmospheric and oceanic technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.774

H-Index - 124

eISSN - 1520-0426

pISSN - 0739-0572

DOI - 10.1175/2009jtecho688.1

Subject(s) - current (fluid) , downwelling , geology , oceanography , front (military) , tidal current , bubble , echo sounding , stratification (seeds) , meteorology , mechanics , upwelling , physics , seed dormancy , germination , botany , dormancy , biology

Air bubbles can be used as oceanographic tracers that indicate the strength of a downwelling current by which they are subducted. In a tidal front in the Fraser Estuary, British Columbia, Canada, vertical currents of up to 0.70 m s−1 subduct bubbles to depths of more than 160 m. Echo sounder measurements are compared with simultaneous ADCP current measurements and are interpreted with a bubble model by S. A. Thorpe, yielding an estimate of the vertical current that carries the bubbles to the depth of measurement.

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