对发生于白垩纪/第三纪(K/T)(距今65 Ma)的天体撞击作用已进行过气候模拟.模拟研究表明,这次撞击事件确能引起全球气温下降到零度以下,持续时间可达1a.而最近对古生物的研究表明,短暂的寒冷气候和全球黑暗并不能导致恐龙等生物灭绝,恶劣的气候可能须持续近10年之久才可能使这些生物大规模灭绝,这说明需要对原先的模拟结果进行修正;其次,发生在新生代、有确凿证据的巨大撞击事件有6次,除白垩纪/第三纪(65 Ma)和 Climate simulations have been conducted on the impact of celestial bodies occurring in the Cretaceous / Tertiary (K / T) (65 Ma up to now) .Simulation studies have shown that this impact can indeed cause the global temperature to drop below zero and the duration Up to 1a. And recent paleontological research shows that a brief cold climate and global darkness do not lead to the extinction of dinosaurs and other creatures, which may take up to 10 years before they can exterminate these organisms on a large scale, indicating the need The original simulation results were corrected; secondly, there were 6 huge impact events in the Cenozoic and well-documented evidence except Cretaceous / Tertiary (65 Ma) and