Two-Year Observations of the Jupiter Polar Regions by JIRAM on Board Juno
Two-Year Observations of the Jupiter Polar Regions by JIRAM on Board Juno
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DOI：
10.1029/2019je006098
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发表时间：
2020-06-01
影响因子：
4.8
通讯作者：
Bolton, S. J.
中科院分区：
文献类型：
--
作者：
Adriani, A.;Bracco, A.;Bolton, S. J.
我们在2017年2月至2019年2月的两年时间里观察了木星极地气旋结构的演变，使用Jovian Red Auroral Mapper JIRAM在Juno使命上的极地观测。图像和光谱由仪器在5 μ m波长范围内收集。这些图像被用来监测北方和南半球纬度高于80度的气旋和反气旋结构的发展。光谱测量，然后被用来监测丰度的次要大气成分水蒸气，氨，磷化氢，锗烷在极地地区，那里的大气光学厚度小于1。最后，我们与地球上的海洋气旋进行了比较分析，试图解释我们在木星极地大气中观察到的气旋结构的光谱特征。
We observed the evolution of Jupiter's polar cyclonic structures over two years between February 2017 and February 2019, using polar observations by the Jovian InfraRed Auroral Mapper, JIRAM, on the Juno mission. Images and spectra were collected by the instrument in the 5-mu m wavelength range. The images were used to monitor the development of the cyclonic and anticyclonic structures at latitudes higher than 80 degrees both in the northern and the southern hemispheres. Spectroscopic measurements were then used to monitor the abundances of the minor atmospheric constituents water vapor, ammonia, phosphine, and germane in the polar regions, where the atmospheric optical depth is less than 1. Finally, we performed a comparative analysis with oceanic cyclones on Earth in an attempt to explain the spectral characteristics of the cyclonic structures we observe in Jupiter's polar atmosphere.