Spectroscopy and chemistry of the atmosphere of Uranus
Spectroscopy and chemistry of the atmosphere of Uranus
复制标题
天王星大气的光谱学和化学
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
R. Prinn
中科院分区：
文献类型：
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作者：
B. Fegley;D. Gautier;T. Owen;R. Prinn
全面回顾了天王星大气的化学和光谱学，通过基于地球的，地球轨道的，旅行者2号的观测覆盖紫外线，可见光，红外线和无线电波长区域。根据这些观测结果，结合平均密度约为1.3克/立方厘米，我们可以推断，相对于太阳的成分，天王星的大气中重元素含量更高。旅行者号之前对可见光区CH 4波段的地球观测和旅行者号无线电掩星数据表明，CH 4/H2体积混合比约为2%，相当于太阳值0.000835的约24倍。与CH 4相反，微波观测表明，相对于太阳NH3/H2混合比-0.000174，在大气的155-200-K区域中NH3明显耗尽100 - 200倍。这表明，推导的时间和纬度变化的NH3/H2混合比在该地区的天王星大气是由于大气环流的影响。
A comprehensive review of the chemistry and spectroscopy of the Uranian atmosphere is presented by means of earth-based, earth-orbital, and Voyager 2 observations covering the UV, visible, infrared, and radio wavelength regions. It is inferred from these observations, in concert with the average density of about 1.3 g/cu cm, that the Uranian atmosphere is enriched in heavy elements relative to solar composition. Pre-Voyager earth-based observations of CH4 bands in the visible region and Voyager radio occultation data imply a CH4/H2 volume mixing ratio of about 2 percent corresponding to an enrichment of approximately 24 times the solar value of 0.000835. In contrast to CH4, microwave observations indicate an apparent depletion of NH3 in the 155-to-200-K region of the atmosphere by 100 to 200 times relative to the solar NH3/H2 mixing ratio of -0.000174. It is suggested that the temporal and latitudinal variations deduced for the NH3/H2 mixing ratio in this region of the Uranian atmosphere are due to atmospheric circulation effects.