使用气象局统一模型探索Proxima B的气候
Exploring the climate of Proxima B with the Met Office Unified Model
摘要：
我们提出了新发现的行星Proxima Centauri B的气候模拟结果，使用气象局统一模型（UM）进行。我们研究了“类地球”大气层和简化的氮气和微量二氧化碳大气层对Proxima Centauri B可能接收到的辐射的响应。此外，我们探索轨道偏心率的行星条件的影响，使用一系列的偏心率的观测约束。总的来说，我们的结果与以前的研究一致，表明Proxima Centauri B可能具有有利于液态水存在的地面温度。此外，我们已经扩大了参数制度，行星可能支持液态水更高的偏心率值（>= 0.1）和较低的入射通量（881.7 Wm-2）比以前的工作。这种增加的参数空间是因为行星对恒星通量变化的敏感性低，这是恒星光谱和轨道配置的结果。然而，我们也发现有趣的差异，从以前的模拟，如冷却器的平均地面温度的潮汐锁定的情况下。最后，我们已经产生了高分辨率的行星发射和反射光谱，并突出了对地球上复杂生命进化至关重要的气体（氧气，臭氧和二氧化碳）的特征。
英文摘要：
We present results of simulations of the climate of the newly discovered planet Proxima Centauri B, performed using the Met Office Unified Model (UM). We examine the responses of both an `Earth-like' atmosphere and simplified nitrogen and trace carbon dioxide atmosphere to the radiation likely received by Proxima Centauri B. Additionally, we explore the effects of orbital eccentricity on the planetary conditions using a range of eccentricities guided by the observational constraints. Overall, our results are in agreement with previous studies in suggesting Proxima Centauri B may well have surface temperatures conducive to the presence of liquid water. Moreover, we have expanded the parameter regime over which the planet may support liquid water to higher values of eccentricity (>= 0.1) and lower incident fluxes (881.7 Wm-2) than previous work. This increased parameter space arises because of the low sensitivity of the planet to changes in stellar flux, a consequence of the stellar spectrum and orbital configuration. However, we also find interesting differences from previous simulations, such as cooler mean surface temperatures for the tidally-locked case. Finally, we have produced high resolution planetary emission and reflectance spectra, and highlight signatures of gases vital to the evolution of complex life on Earth (oxygen, ozone and carbon dioxide).
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