Circumbinary planets may comprise a significant fraction of the temperate rocky planets in our galaxy. A wide range of previous work has explored the climate of circumbinary planets with one‐dimensional energy balance models, but studies utilizing three‐dimensional general circulation models (GCMs) have only explored gaseous or ocean‐covered planets. Recent GCM results from Wolf et al. (2020, https://doi.org/10.1029/2020JE006576) determine the impact of the time‐varying stellar forcing on the climate of Earth‐like circumbinary planets in a broad range of 12 modeled systems with stellar spectral types from G2 to M0. The planets modeled are assumed to have the same continental and oceanic configuration as Earth and receive the same time‐averaged stellar instellation as Earth. In all cases the climate variability has a low amplitude, with local maximum temperatures never exceeding the wet bulb threshold for human life. As a result, Earth‐like life could persist on circumbinary planets that undergo large‐amplitude orbital variations in instellation, and such planets remain viable targets to search for biosignatures and other key habitability indicators.

中文翻译：

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温带岩石外行星的稳定气候

在我们的银河系中，外行星可能占温带岩石行星的很大一部分。先前的大量工作都使用一维能量平衡模型探索了环行行星的气候，但是利用三维通用环流模型（GCM）进行的研究仅探索了气态或海洋覆盖的行星。Wolf等人最近的GCM结果。（2020，https://doi.org/10.1029/2020JE006576）确定时变恒星强迫对从G2到M0的恒星光谱类型的12种建模系统的广泛影响，对类地球外行星的气候产生影响。假定模拟的行星与地球具有相同的大陆和海洋构造，并且与地球具有相同的时间平均恒星。在所有情况下，气候变率的幅度都较小，局部最高温度不得超过人类生命的湿球阈值。结果，类地球生命可能会继续在星际上经历大幅度轨道变化的外行星上，这样的行星仍然是寻找生物签名和其他关键可居住性指标的可行目标。