根据Juno UVS观测木星平流层中C $_2$ H $_2$的经向变化
Meridional variations of C$_2$H$_2$ in Jupiter's stratosphere from Juno UVS observations
摘要：
朱诺号上的紫外线观测仪记录了从木星反射的远紫外线。这些光谱对高层大气中化学物种的丰度和平流层霾层的分布很敏感。我们结合从第一个30 perijoves的任务，以研究乙炔（C $_2$ H $_2$）在木星平流层的纬向分布的意见。我们发现C $_2$ H $_2$的丰度向两极减少2-4倍，与以前的中红外光谱分析一致。这一结果是从日照率预期的：在赤道附近，紫外线太阳通量较高，允许CH $_4$的紫外线光解产生更多的C $_2$ H $_2$。丰度向两极的减少表明，水平混合率不够快，均匀的纬度分布。
英文摘要：
The UVS instrument on the Juno mission records far-ultraviolet reflected sunlight from Jupiter. These spectra are sensitive to the abundances of chemical species in the upper atmosphere and to the distribution of the stratospheric haze layer. We combine observations from the first 30 perijoves of the mission in order to study the meridional distribution of acetylene (C$_2$H$_2$) in Jupiter's stratosphere. We find that the abundance of C$_2$H$_2$ decreases towards the poles by a factor of 2-4, in agreement with previous analyses of mid-infrared spectra. This result is expected from insolation rates: near the equator, the UV solar flux is higher, allowing more C$_2$H$_2$ to be generated from the UV photolysis of CH$_4$. The decrease in abundance towards the poles suggests that horizontal mixing rates are not rapid enough to homogenize the latitudinal distribution.
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