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Free Content Red Sea budgets of salinity, nutrients and carbon calculated in the Strait of Bab-El-Mandab during the summer and winter seasons

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Annual budgets of salinity, total inorganic carbon, total alkalinity, nitrates, phosphates and silicates are estimated through the Strait of Bab-el-Mandab. Two different methods that decouple the summer and winter periods are used.

A direct method uses the concentrations of these parameters, the velocity of currents, and the area of a cross section in the strait. The calculations for the fluxes and budgets during the summer period were based on data collected during two cruises made in July and September 1982 (MEROU 1 and 2).

An indirect method, based upon matrix inversion and the assumption of a steady-state balance of several properties over a period of one year, is used to calculate the winter and summer budgets of water, salinity, total inorganic carbon, total alkalinity, nitrates and phosphates.

The summer budgets obtained by the two different methods are positive for all the properties—a gain for the Red Sea—and are of the same order of magnitude for both methods. For the winter period, budgets are positive for total inorganic carbon and total alkalinity and negative for salinity and nutrients. This gain of total inorganic carbon and total alkalinity through the Strait of Bab-el-Mandab can be quantitatively explained by exchanges of CO2 with the atmosphere and the processes of sedimentation in the basin.

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Document Type: Research Article

Publication date: May 1, 1989

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  • The Journal of Marine Research, one of the oldest journals in American marine science, publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography. Articles that deal with processes, as well as those that report significant observations, are welcome. Biological studies involving coupling between ecological and physical processes are preferred over those that report systematics. The editors strive always to serve authors and readers in the academic oceanographic community by publishing papers vital to the marine research in the long and rich tradition of the Sears Foundation for Marine Research. We welcome you to the Journal of Marine Research.
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