Steam atmospheres and magma oceans on planets
Steam atmospheres and magma oceans on planets
复制标题
行星上的蒸汽大气和岩浆海洋
DOI：
10.1093/acrefore/9780190647926.013.203
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Keiko Hamano
中科院分区：
文献类型：
--
作者：
Keiko Hamano
岩浆海洋是一个全球性的部分或完全熔融的岩石层。类地行星的显著融化可能是由于行星吸积过程中的热释放，例如短寿命放射性核素的衰变热，持续的小行星吸积释放的撞击能量，以及行星大小的天体之间的高能撞击（巨大撞击）。在岩浆海洋上，所有的水，在撞击时释放或从内部脱气，以过热蒸汽的形式存在，形成以水为主的蒸汽大气。延伸到地表的岩浆海洋预计将通过物质和热交换与上覆的蒸汽大气相互作用。
A magma ocean is a global layer of partially or fully molten rocks. Significant melting of terrestrial planets likely occurs due to heat release during planetary accretion, such as decay heat of short-lived radionuclides, impact energy released by continuous planetesimal accretion, and energetic impacts among planetary-sized bodies (giant impacts). Over a magma ocean, all water, which is released upon impact or degassed from the interior, exists as superheated vapor, forming a water-dominated, steam atmosphere. A magma ocean extending to the surface is expected to interact with the overlying steam atmosphere through material and heat exchange.