Bottom stress measurements on the inner shelf
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Abstract
Bottom stress shapes the mean circulation patterns, controls sediment transport, and influences benthic habitat in the coastal ocean. Accurate and precise measurements of bottom stress have proved elusive, in part because of the difficulty in separating the turbulent eddies that transport momentum from inviscid wave-induced motions. Direct covariance measurements from a pair of acoustic Doppler velocimeters has proved capable of providing robust estimates, so we designed a mobile platform coined the NIMBBLE for these measurements, and deployed two of them and two more conventional quadpods at seven sites on the inner shelf over a period of seven months. The resulting covariance estimates of stress and bottom roughness were lower than log-fit estimates, especially during calmer periods. Analyses of these data suggest the NIMBBLEs may provide an accurate and practical method for measuring bottom stress.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Bottom stress measurements on the inner shelf |
| DOI | 10.1142/9789814689977_0058 |
| Year Published | 2015 |
| Language | English |
| Publisher | World Scientific |
| Contributing office(s) | Woods Hole Coastal and Marine Science Center |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | The Proceedings of the Coastal Sediments 2015 |
| Conference Title | Coastal Sediments 2015 |
| Conference Location | San Diego, CA |
| Conference Date | May 11-15, 2015 |
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