A comparison of Eastern Boundary Upwelling Ecosystems¶
Chavez, & Messié. (2009). A comparison of Eastern Boundary Upwelling Ecosystems. Progress in Oceanography.
Cited by¶
4 citations across 4 artifacts.
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Domain-specific¶
- Coastal Upwelling
- The four major eastern-boundary upwelling systems — the Humboldt (Peru–Chile), California, Benguela (southwest Africa), and Canary (northwest Africa) — cover less than 1 percent of the ocean surface but support roughly 20 percent of the global marine fish catch
This sourceComparative synthesis of the four eastern-boundary upwelling systems (Humboldt, California, Benguela, Canary), giving their small share of ocean area against their disproportionate share of global fish catch.
- The four major eastern-boundary upwelling systems — the Humboldt (Peru–Chile), California, Benguela (southwest Africa), and Canary (northwest Africa) — cover less than 1 percent of the ocean surface but support roughly 20 percent of the global marine fish catch
- Divergence Zone
- In coastal upwelling — the canonical oceanographic case — persistent equatorward winds drive surface water offshore through Ekman transport; the resulting surface deficit near the coast is filled by cold, nutrient-laden water rising from 50–200 m depth, supporting the world's most productive fisheries in the Humboldt, Benguela, and California current systems
This sourceComparative synthesis of the four eastern-boundary upwelling systems, including their disproportionate share of global fish landings.
- In coastal upwelling — the canonical oceanographic case — persistent equatorward winds drive surface water offshore through Ekman transport; the resulting surface deficit near the coast is filled by cold, nutrient-laden water rising from 50–200 m depth, supporting the world's most productive fisheries in the Humboldt, Benguela, and California current systems
- Ekman Transport
- Where equatorward winds run along an eastern continental boundary — the California, Peru, Benguela, and Canary currents — Ekman transport drives surface water offshore (to the right of equatorward winds in the NH, to the left in the SH), opening a divergence at the coast that forces cold, nutrient-rich subsurface water upward to replace it: the coastal upwelling mechanism that sustains the world's most productive fisheries
This sourceOffshore Ekman transport under equatorward winds on eastern boundaries driving coastal upwelling in the California, Humboldt, Benguela and Canary systems, and their fishery productivity.
- Where equatorward winds run along an eastern continental boundary — the California, Peru, Benguela, and Canary currents — Ekman transport drives surface water offshore (to the right of equatorward winds in the NH, to the left in the SH), opening a divergence at the coast that forces cold, nutrient-rich subsurface water upward to replace it: the coastal upwelling mechanism that sustains the world's most productive fisheries
- Upwelling
- The roughly 1% of ocean surface area occupied by major coastal upwelling systems — the Humboldt (Peru–Chile), Benguela (Namibia–South Africa), California, Canary, and Somali current systems — yields approximately 20–50% of global marine fish catch
This sourceThe four eastern-boundary upwelling systems and the disproportionate share of global fish catch they yield from a very small fraction of ocean area. The Peru/Humboldt Ekman-driven coastal upwelling cascade and the shelf depth from which the nutrient-rich replacement water is drawn.
- The roughly 1% of ocean surface area occupied by major coastal upwelling systems — the Humboldt (Peru–Chile), Benguela (Namibia–South Africa), California, Canary, and Somali current systems — yields approximately 20–50% of global marine fish catch
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