CONVERSION OF PARA-HYDROGEN AND ORTHO-HYDROGEN IN THE JOVIAN PLANETS
CONVERSION OF PARA-HYDROGEN AND ORTHO-HYDROGEN IN THE JOVIAN PLANETS
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DOI：
10.1016/0019-1035(82)90073-2
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发表时间：
1982-01-01
期刊：
影响因子：
3.2
通讯作者：
HUNTEN, DM
中科院分区：
文献类型：
--
作者：
MASSIE, ST;HUNTEN, DM
提出了一种部分平衡木星、土星和天王星大气中分子氢的顺向和垂直自转能级的机制。如果每次碰撞的转化效率在10−8到10−10之间，有效涡旋混合系数为104 cm~2/s，气溶胶粒子的自由基表面位与氢分子之间的催化反应在1bar压力附近产生显著的平衡。在较低的气压下，正反比保留了云层顶部的值，除了在热层中转换的非常小的影响。研究了转化率对比热和绝热衰减率的影响。人们发现，这种影响通常很小，尽管在气溶胶层内，它可以上升到10%。
A mechanism is proposed which partially equilibrates the para and ortho rotational levels of molecular hydrogen in the atmospheres of Jupiter, Saturn, and Uranus. Catalytic reactions between the free-radical surface sites of aerosol particles and hydrogen molecules yield significant equilibration near 1 bar pressure, if the efficiency of conversion per collision is between 10−8and 10−10and the effective eddy mixing coefficient is 104cm2/sec. At lower pressures the ortho-para ratio retains the value at the top of the cloud layer, except for a very small effect from conversion in the thermosphere. The influence of conversion on the specific heat and adiabatic lapse rate is also investigated. The effect is found to be generally small, though it can rise to 10% inside the aerosol layer.