ON THE LIKELIHOOD OF PLATE TECTONICS ON SUPER-EARTHS: DOES SIZE MATTER?
ON THE LIKELIHOOD OF PLATE TECTONICS ON SUPER-EARTHS: DOES SIZE MATTER?
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关于超级地球上板块构造的可能性：大小重要吗？
DOI：
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发表时间：
2010
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通讯作者：
J. Korenaga
中科院分区：
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作者：
J. Korenaga
地球上板块构造的运行对于在地质时期调节其大气成分至关重要，因此通常认为对于整个行星的宜居性至关重要。有人认为，板块构造很可能适用于超级地球，无论有或没有地表水，因为质量较大的行星往往有足够的对流应力来摆脱停滞盖对流模式。在这里，根据最近发展的板块构造对流比例定律重新审视了这一建议，该定律表明行星尺寸起着相当小的作用，并且板块构造的可能性主要由地表水的存在控制。
The operation of plate tectonics on Earth is essential to modulate its atmospheric composition over geological time and is thus commonly believed to be vital for planetary habitability at large. It has been suggested that plate tectonics is very likely for super-Earths, with or without surface water, because a planet with a larger mass tends to have sufficient convective stress to escape from the mode of stagnant-lid convection. Here, this suggestion is revisited on the basis of the recently developed scaling laws of plate-tectonic convection, which indicate that the planetary size plays a rather minor role and that the likelihood of plate tectonics is controlled largely by the presence of surface water.