Heat flow measurement in shallow seas through long-term temperature monitoring

Details Heat flow measurement in shallow seas through long-term temperature monitoring Heat flow measurement in shallow seas through long-term temperature monitoring

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3221311h&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 21, CiteID L21311

Physics

Geophysics

3

Marine Geology And Geophysics: Heat Flow (Benthic), Marine Geology And Geophysics: Subduction Zone Processes (1031, 3613, 8170, 8413), Marine Geology And Geophysics: Instruments And Techniques, Tectonophysics: Heat Generation And Transport, Tectonophysics: Subduction Zone Processes (1031, 3060, 3613, 8413)

Scientific paper

It is difficult to obtain reliable heat flow values in shallow sea areas where the bottom water temperature is not stable. We attempted to measure heat flow in shallow seas by monitoring temperature profiles in sediments, using pop-up type instruments with 2 m long temperature probes. Long-term temperature records for over 200 days were obtained at four stations off southwest Japan. Analysis of the data showed the bottom water temperature variations (BTV) were propagated through sediments by thermal diffusion only. We could then remove the influence of BTV from the temperature records and determine the heat flow, though the effect of longer period components in BTV has possibly remained. The obtained heat flow values are consistent with those estimated from depths of gas hydrate BSRs in the vicinities of the stations. These results indicate that long-term temperature monitoring is a useful method for heat flow determination in shallow seas.

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