论文标题
在阳光状恒星和M型warfs周围的温带行星上的水生生物圈的特征
Characteristics of aquatic biospheres on temperate planets around Sun-like stars and M-dwarfs
论文作者
论文摘要
预计依赖于氧的光合作用的水生生物圈有望在碳固定（即有机化合物的生物合成）的赋予地球状的行星上发挥重要作用。我们研究了包含地面生物圈的水生生物圈的特性，用于旋转的阳光恒星和晚型M-dwarfs（例如trappist-1）。特别是，我们估计这些特征如何通过光合活性辐射（PAR）和环境海洋温度（$ t_w $）的可用通量演变而来，后者构成了关键的环境变量。我们表明，许多显着特性，例如光合作用区的深度和净初级生产率（即碳固定的有效速率），对PAR通量和$ t_w $都敏感，并且当前者降低或后者时大大下降。我们通过探索分析对围绕太阳般的恒星和M矮人的分析的含义来结束。
Aquatic biospheres reliant on oxygenic photosynthesis are expected to play an important role on Earth-like planets endowed with large-scale oceans insofar as carbon fixation (i.e., biosynthesis of organic compounds) is concerned. We investigate the properties of aquatic biospheres comprising Earth-like biota for habitable rocky planets orbiting Sun-like stars and late-type M-dwarfs such as TRAPPIST-1. In particular, we estimate how these characteristics evolve with the available flux of photosynthetically active radiation (PAR) and the ambient ocean temperature ($T_W$), the latter of which constitutes a key environmental variable. We show that many salient properties, such as the depth of the photosynthesis zone and the net primary productivity (i.e., the effective rate of carbon fixation), are sensitive to PAR flux and $T_W$ and decline substantially when the former is decreased or the latter is increased. We conclude by exploring the implications of our analysis for exoplanets around Sun-like stars and M-dwarfs.
