Two-Year Observations of the Jupiter Polar Regions by JIRAM on Board Juno

被引：25

作者：

Adriani, A. ^{[1
]}

Bracco, A. ^{[2
]}

Grassi, D. ^{[1
]}

Moriconi, M. L. ^{[3
]}

Mura, A. ^{[1
]}

Orton, G. ^{[4
]}

Altieri, F. ^{[1
]}

Ingersoll, A. ^{[5
]}

Atreya, S. K. ^{[6
]}

Lunine, J. I. ^{[7
]}

Migliorini, A. ^{[1
]}

Noschese, R. ^{[1
]}

Cicchetti, A. ^{[1
]}

Sordini, R. ^{[1
]}

Tosi, F. ^{[1
]}

Sindoni, G. ^{[8
]}

Plainaki, C. ^{[8
]}

Dinelli, B. M. ^{[3
]}

Turrini, D. ^{[1
]}

Filacchione, G. ^{[1
]}

Piccioni, G. ^{[1
]}

Bolton, S. J. ^{[9
]}

机构：

[1] IINAF Ist Astrofis & Planetol Spaziali, Rome, Italy

[2] Georgia Inst Technol, Atlanta, GA 30332 USA

[3] CNR, Ist Sci Atmosfera & Clima, Bologna, Italy

[4] CALTECH, Jet Prop Lab, Pasadena, CA USA

[5] CALTECH, Pasadena, CA 91125 USA

[6] Univ Michigan, Planet Sci Lab, Ann Arbor, MI 48109 USA

[7] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[8] Agenzia Spaziale Italiana, Rome, Italy

[9] Southwest Res Inst, San Antonio, TX USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS | 2020年 / 125卷 / 06期

基金：

美国国家科学基金会;

关键词：

Jupiter; planetary atmosphere; polar regions; composition; Mesoscale dynamics; POWER SPECTRUM ANALYSIS; CLOUD STRUCTURE; SURFACE; DYNAMICS;

D O I：

10.1029/2019JE006098

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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.

引用

页数：12

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