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Free Content Tidal and Long-term Volume Transport Through Jewfish Creek, Florida Keys

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Abstract:

A 14-mo current meter record together with channel calibration measurements are used to investigate the dynamics of long-term volume transport through Jewfish Creek, the main channel connecting Blackwater Sound in northeastern Florida Bay with Barnes Sound, a southern extension of Biscayne Bay. Seasonal variations dominate the long-term flow through this channel as water generally flows into Blackwater Sound during fall, winter and early spring months, then out of the sound in late spring and summer. Low-frequency reversals occur over time scales of several days to about 2 wks throughout the study period. Flow into or out of Florida Bay typically averaged ±30–50 m3 s–1 over these time scales. Low-frequency motions account for 80% of the total variance in a long-channel volume transport. Harmonic analysis quantifies the amplitude of the dominant M2 tidal constituent at 27 m3 s–1 and over half of any M2 tidal cycle 380 × 103 m3 of water moves past the study site. Water level records indicate that the tidal transport is forced by Atlantic tides entering Barnes Sound through Biscayne Bay; Blackwater Sound is virtually tideless. Low-frequency flow through the channel is driven by a broad range of wind stress components acting to create water level differences between the two subbasins. Water level is most responsive to the 030–210° wind stress component and over all time scales between about 2 d and 4 wks this component of wind stress accounts for 50–85% of the total variance in water level differences between Barnes Sound and Blackwater Sound. These water level differences explain 88% of the variance in low-frequency flow through Jewfish Creek.

Document Type: Research Article

Publication date: 1998-11-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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