globalchange  > 气候减缓与适应
DOI: 10.1002/2013GL059078
论文题名:
The long-term steady motion of Saturn's hexagon and the stability of its enclosed jet stream under seasonal changes
作者: Sánchez-Lavega A.; Del Río-Gaztelurrutia T.; Hueso R.; Pérez-Hoyos S.; García-Melendo E.; Antuñano A.; Mendikoa I.; Rojas J.F.; Lillo J.; Barrado-Navascués D.; Gomez-Forrellad J.M.; Go C.; Peach D.; Barry T.; Milika D.P.; Nicholas P.; Wesley A.
刊名: Geophysical Research Letters
ISSN: 0094-10300
EISSN: 1944-10031
出版年: 2014
卷: 41, 期:5
起始页码: 1425
结束页码: 1431
语种: 英语
英文关键词: meteorology ; polar regions ; Saturn
Scopus关键词: Earth sciences ; Geophysics ; Meteorology ; Hubble space telescopes ; Persistent feature ; Polar Regions ; Rotation period ; Saturn ; Science systems ; Seasonal changes ; Seasonal variation ; Planets ; anticyclone ; image analysis ; jet stream ; meteorology ; Rossby wave ; rotation ; Saturn ; seasonal variation ; space technology ; steady flow
英文摘要: We investigate the long-term motion of Saturn's north pole hexagon and the structure of its associated eastward jet, using Cassini imaging science system and ground-based images from 2008 to 2014. We show that both are persistent features that have survived the long polar night, the jet profile remaining essentially unchanged. During those years, the hexagon vertices showed a steady rotation period of 10 h 39 min 23.01 ± 0.01 s. The analysis of Voyager 1 and 2 (1980-1981) and Hubble Space Telescope and ground-based (1990-1991) images shows a period shorter by 3.5 s due to the presence at the time of a large anticyclone. We interpret the hexagon as a manifestation of a vertically trapped Rossby wave on the polar jet and, because of their survival and unchanged properties under the strong seasonal variations in insolation, we propose that both hexagon and jet are deep-rooted atmospheric features that could reveal the true rotation of the planet Saturn. Key Points Hexagon wave steady motion Jet stream unchanged to seasonal changes Saturn's rotation ©2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895686289&doi=10.1002%2f2013GL059078&partnerID=40&md5=7ab998422decfcc4bc4e2c3395968884
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7564
Appears in Collections:气候减缓与适应

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作者单位: Departamento de Física Aplicada i, E.T.S. Ingeniería, Universidad Del País Vasco, Bilbao, Spain

Recommended Citation:
Sánchez-Lavega A.,Del Río-Gaztelurrutia T.,Hueso R.,et al. The long-term steady motion of Saturn's hexagon and the stability of its enclosed jet stream under seasonal changes[J]. Geophysical Research Letters,2014-01-01,41(5).
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