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I have thought about this question many times. In fact, I made up climate charts for world cities in the "reversed rotation" Earth.
In the case of South America, Buenos Aires would be around 3°C cooler throughout the year due to the fact that we'd have the Antarctic Current flowing on the east coast. On the other hand, Chile would be warmer, since there wouldn't be any Antarctic Current over there.
This difference between the two scenarios would diminish towards the south, and in Ushuaia and Punta Arenas, the difference would be minimal. They would be more or less like they actually are.
New York City would be warmer throughout the year. The west coast of Europe would be cooler (no Gulf Stream), so the UK, France, Spain, etc. would have colder winters, with more snow.
As deneb said with Seoul, the east coast of Asia in general would be warmer.
But then, I'm no expert so perhaps I'm missing something. I know the direction of the ocean currents are determined in part by the direction of the Earth's rotation, but I may be missing many other factors.
Seattle would become one cold city in winter. As would Vancouver. LA's and San Francisco's summers would become very hot even along the coast. Snow would be virtually nonexistent here in the Mid-Atlantic region. Western Europe would gain a reputation for particularly brutal winters. Weird world to think about.
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