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Estimation of the transports through the Strait of Gibraltar

Estimation of the transports through the Strait of Gibraltar
Estimation of the transports through the Strait of Gibraltar
An acoustic doppler current profiler (ADCP) is used to measure the currents and estimate the transports over the Camarinal Sill at the Strait of Gibraltar. The deepest measurements of the ADCP compare well with an underlying conventional current meter. The exchange interface between the Atlantic and the Mediterranean water is defined as the depth of the maximum vertical shear. The mean depth of the shear interface is 147 m. The time series of the depth of the interface and the currents are used to estimate the transports across the Strait. The resulting values are 0.78 Sv for the Atlantic inflow and ?0.67 Sv for the Mediterranean outflow. The time series of the shear interface include fortnightly oscillations of 19 m. The time series of the transports are compared with the pressure and sea level difference records across the Strait. Linear multiple regression is used to estimate the (statistical) contribution of each parameter on the variation of transports. The cross strait sea level difference is well correlated with the Atlantic inflow and accounts for 57% of the variability of the transport records which improves to 78% when the fortnightly and monthly cycles are included in the linear regression. The Mediterranean outflow is best correlated with the along strait sea level difference which accounts for only 10% of the variability of the transport record. Again the addition of the Msf and the MM cycles improves the percentage of the variance accounted for to 37%. The local, along strait wind component is significantly correlated with, both the Atlantic inflow and the across strait sea level difference.
GIBRALTAR STRAIT, ADCP, CAMARINAL SILL, OUTFLOW, WATER EXCHANGE, MEDITERRANEAN WATER, TIME SERIES, STRAIT DYNAMICS, INFLOW, WOCE
0967-0637
2219-2242
Tsimplis, M.N.
df6dd749-cda4-46ec-983c-bf022d737031
Bryden, H.L.
7f823946-34e8-48a3-8bd4-a72d2d749184
Tsimplis, M.N.
df6dd749-cda4-46ec-983c-bf022d737031
Bryden, H.L.
7f823946-34e8-48a3-8bd4-a72d2d749184

Tsimplis, M.N. and Bryden, H.L. (2000) Estimation of the transports through the Strait of Gibraltar. Deep Sea Research Part I: Oceanographic Research Papers, 47 (12), 2219-2242. (doi:10.1016/S0967-0637(00)00024-8).

Record type: Article

Abstract

An acoustic doppler current profiler (ADCP) is used to measure the currents and estimate the transports over the Camarinal Sill at the Strait of Gibraltar. The deepest measurements of the ADCP compare well with an underlying conventional current meter. The exchange interface between the Atlantic and the Mediterranean water is defined as the depth of the maximum vertical shear. The mean depth of the shear interface is 147 m. The time series of the depth of the interface and the currents are used to estimate the transports across the Strait. The resulting values are 0.78 Sv for the Atlantic inflow and ?0.67 Sv for the Mediterranean outflow. The time series of the shear interface include fortnightly oscillations of 19 m. The time series of the transports are compared with the pressure and sea level difference records across the Strait. Linear multiple regression is used to estimate the (statistical) contribution of each parameter on the variation of transports. The cross strait sea level difference is well correlated with the Atlantic inflow and accounts for 57% of the variability of the transport records which improves to 78% when the fortnightly and monthly cycles are included in the linear regression. The Mediterranean outflow is best correlated with the along strait sea level difference which accounts for only 10% of the variability of the transport record. Again the addition of the Msf and the MM cycles improves the percentage of the variance accounted for to 37%. The local, along strait wind component is significantly correlated with, both the Atlantic inflow and the across strait sea level difference.

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More information

Published date: 2000
Keywords: GIBRALTAR STRAIT, ADCP, CAMARINAL SILL, OUTFLOW, WATER EXCHANGE, MEDITERRANEAN WATER, TIME SERIES, STRAIT DYNAMICS, INFLOW, WOCE

Identifiers

Local EPrints ID: 8742
URI: https://eprints.soton.ac.uk/id/eprint/8742
ISSN: 0967-0637
PURE UUID: 27a1856d-0b20-4518-b4f5-07ac3fd0e9dc
ORCID for H.L. Bryden: ORCID iD orcid.org/0000-0002-8216-6359

Catalogue record

Date deposited: 14 Sep 2004
Last modified: 06 Jun 2018 13:02

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