A deep intermediate nepheloid layer

S. A. Thorpe; M. White

doi:10.1016/0198-0149(88)90109-4

A deep intermediate nepheloid layer

S. A. Thorpe, M. White

University of Southampton

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

79 Citations (Scopus)

Abstract

A weak, but very large, intermediate nepheloid layer has been observed on two occasions 8 months apart at a depth of about 2550 m adjacent to the continental slope off the Porcupine Bank. It extended along the slope for over 100 km with no trend in its intensity, and offslope to about 16 km or about 1.4 times the internal Rossby radius. Further offslope, maximum light scattering was found near the depths at which the M₂ internal tide is "critical" on the slope. It is suggested that whilst transient nepheloid layers near the slope may temporarily dominate the nephel "signal", the pattern of light scattering far from the slope is determined by more persistent processes such as the result of sediment erosion by the larger bottom currents associated with "critical" internal waves.

Original language	English
Pages (from-to)	1665-1671
Number of pages	7
Journal	Deep Sea Research Part A, Oceanographic Research Papers
Volume	35
Issue number	9
DOIs	https://doi.org/10.1016/0198-0149(88)90109-4
Publication status	Published - Sep 1988
Externally published	Yes

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AU - Thorpe, S. A.

AU - White, M.

PY - 1988/9

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N2 - A weak, but very large, intermediate nepheloid layer has been observed on two occasions 8 months apart at a depth of about 2550 m adjacent to the continental slope off the Porcupine Bank. It extended along the slope for over 100 km with no trend in its intensity, and offslope to about 16 km or about 1.4 times the internal Rossby radius. Further offslope, maximum light scattering was found near the depths at which the M2 internal tide is "critical" on the slope. It is suggested that whilst transient nepheloid layers near the slope may temporarily dominate the nephel "signal", the pattern of light scattering far from the slope is determined by more persistent processes such as the result of sediment erosion by the larger bottom currents associated with "critical" internal waves.

AB - A weak, but very large, intermediate nepheloid layer has been observed on two occasions 8 months apart at a depth of about 2550 m adjacent to the continental slope off the Porcupine Bank. It extended along the slope for over 100 km with no trend in its intensity, and offslope to about 16 km or about 1.4 times the internal Rossby radius. Further offslope, maximum light scattering was found near the depths at which the M2 internal tide is "critical" on the slope. It is suggested that whilst transient nepheloid layers near the slope may temporarily dominate the nephel "signal", the pattern of light scattering far from the slope is determined by more persistent processes such as the result of sediment erosion by the larger bottom currents associated with "critical" internal waves.

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DO - 10.1016/0198-0149(88)90109-4

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VL - 35

SP - 1665

EP - 1671

JO - Deep Sea Research Part A, Oceanographic Research Papers

JF - Deep Sea Research Part A, Oceanographic Research Papers

IS - 9

ER -

A deep intermediate nepheloid layer

Abstract

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