Dynamics of upwelling annual cycle in the equatorial Atlantic Ocean
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چکیده
منابع مشابه
Equatorial upwelling enhances nitrogen fixation in the Atlantic Ocean
[1] Surface waters in upwelling regions are thought to be nutrient rich and hence inhibit nitrogen fixation (diazotrophy) because diazotrophs can preferentially assimilate nitrate and ammonia instead of expending energy to fix dinitrogen. We found average nitrogen fixation rates to be two to seven times higher in the surface waters of the upwelling region of the eastern equatorial Atlantic than...
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Ocean upwelling rates are difficult to measure because of the relatively small velocities involved, and therefore are typically inferred from indirect methods such as heat budget estimates or tracer observations. Here we present the first results using a novel technique, based on the isotope Be, to infer rates of upwelling along the equator. Beryllium-7 (half-life1⁄453.3 d) is a cosmic-ray prod...
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Abstract The primary seasonal phytoplankton bloom in the equatorial Atlantic occurs in boreal summer in response to seasonal strengthening of zonal winds. However, the equatorial Atlantic also has a secondary bloom in late fall – early winter. This secondary bloom is weaker than the primary bloom by a factor of two, but is subject to year-to-year variability that is similar in magnitude. Here, ...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2017
ISSN: 0094-8276,1944-8007
DOI: 10.1002/2017gl072588