中国的竺可桢汇总了几千年来的平均气温，发现秦汉唐宋明清的盛世，都对应着暖湿期。如明朝末年，对应小冰河期。北美历史气温呢？

来源: thore 于 2024-11-19 01:47:22 [旧帖] [给我悄悄话] 本文已被阅读：次

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