50倍超新星爆发后臭氧消耗引起的气候变化

B. Thomas, Cody L. Ratterman
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引用次数: 1

摘要

众所周知,地球大气中的臭氧对气候有辐射强迫作用。在地球化学证据的推动下,大约260万年前附近有一颗或多颗超新星,我们研究了一个问题,即大约50%的超新星是否会通过对大气臭氧浓度的影响而引起地球气候的变化。我们使用了“行星模拟器”(PlaSim)的中等复杂气候模型,并从现有的大气化学模型中提取了规定的臭氧剖面。对全球平均地表温度的影响较小,但局部变化较大,大气环流和降水模式的区域差异可能显著。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ozone depletion-induced climate change following a 50 pc supernova
Ozone in Earth's atmosphere is known to have a radiative forcing effect on climate. Motivated by geochemical evidence for one or more nearby supernovae about 2.6 million years ago, we have investigated the question of whether a supernova at about 50 pc could cause a change in Earth's climate through its impact on atmospheric ozone concentrations. We used the "Planet Simulator" (PlaSim) intermediate-complexity climate model with prescribed ozone profiles taken from existing atmospheric chemistry modeling. We found that the effect on globally averaged surface temperature is small, but localized changes are larger and differences in atmospheric circulation and precipitation patterns could be significant regionally.
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