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Tidal current effects on temperature in diffuse hydrothermal flow: Guaymas Basin
Author(s) -
Little Sarah A.,
Stolzenbach Keith D.,
Grassle Frederick J.
Publication year - 1988
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl015i013p01491
Subject(s) - hydrothermal circulation , current (fluid) , hydrothermal vent , geology , flow (mathematics) , structural basin , thermal , atmospheric sciences , oceanography , environmental science , mechanics , meteorology , geomorphology , physics , seismology
A twelve day record of temperature collected from the diffuse flow area of a Guaymas Basin hydrothermal site exhibits variations, from a minimum of 3.05°C to a maximum of 4.87°C, whose periodicity is correlated with tides measured at the nearby town of Guaymas. A simple model, based on the hypothesis that temperature variations result as changes in tidal bottom currents induce changes in the height of the thermal boundary layer, is in good quantitative agreement with observed temperatures for most of the record. The success of this model illustrates that the effects of tidal currents can be strong enough to dominate the time variability of a temperature signal at a fixed point in hydrothermal flow. Therefore, tidal currents must be taken into account when using temperature measurements to estimate time varying heat fluxes from hydrothermal diffuse flow regions.