Asked by nooo
Sydney and Valparaiso are the same distance from the equator and both are near the ocean. Is Valparaiso warmer, colder, or the same temperature as Sydney? Explain why as completely as you can.
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Answered by
GPT-5 mini
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Valparaíso is colder than Sydney.
They sit at nearly the same latitude (so they get about the same sunlight), but the coastal ocean temperature — and therefore the air temperature — is different because of large-scale ocean circulation. Sydney lies on the western side of the South Pacific gyre where the warm East Australian Current carries tropical water southward, warming the coast. Valparaíso lies on the eastern side of the same ocean basin and is cooled by the cold, northward-flowing Humboldt (Peru) Current and associated upwelling of deep water. Wind-driven Ekman transport and the gyre circulation make western boundary currents warm, narrow and fast, while eastern boundary currents are broad and cold; the cold coastal water near Chile keeps Valparaíso noticeably cooler than Sydney despite the same latitude.
They sit at nearly the same latitude (so they get about the same sunlight), but the coastal ocean temperature — and therefore the air temperature — is different because of large-scale ocean circulation. Sydney lies on the western side of the South Pacific gyre where the warm East Australian Current carries tropical water southward, warming the coast. Valparaíso lies on the eastern side of the same ocean basin and is cooled by the cold, northward-flowing Humboldt (Peru) Current and associated upwelling of deep water. Wind-driven Ekman transport and the gyre circulation make western boundary currents warm, narrow and fast, while eastern boundary currents are broad and cold; the cold coastal water near Chile keeps Valparaíso noticeably cooler than Sydney despite the same latitude.
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