globalchange  > 气候减缓与适应
DOI: 10.1029/2018JE005555
Scopus记录号: 2-s2.0-85049850275
论文题名:
First Estimate of Wind Fields in the Jupiter Polar Regions From JIRAM-Juno Images
作者: Grassi D.; Adriani A.; Moriconi M.L.; Mura A.; Tabataba-Vakili F.; Ingersoll A.; Orton G.; Hansen C.; Altieri F.; Filacchione G.; Sindoni G.; Dinelli B.M.; Fabiano F.; Bolton S.J.; Levin S.; Atreya S.K.; Lunine J.I.; Momary T.; Tosi F.; Migliorini A.; Piccioni G.; Noschese R.; Cicchetti A.; Plainaki C.; Olivieri A.; Turrini D.; Stefani S.; Sordini R.; Amoroso M.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期:6
起始页码: 1511
结束页码: 1524
语种: 英语
英文关键词: Jupiter atmosphere ; planetary vortices ; wind speeds
Scopus关键词: infrared imagery ; Jupiter ; planetary atmosphere ; polar region ; satellite imagery ; spacecraft ; vorticity ; wind field ; wind velocity
英文摘要: We present wind speeds at the ~ 1 bar level at both Jovian polar regions inferred from the 5-μm infrared images acquired by the Jupiter InfraRed Auroral Mapper (JIRAM) instrument on the National Aeronautics and Space Administration Juno spacecraft during its fourth periapsis (2 February 2017). We adopted the criterion of minimum mean absolute distortion (Gonzalez & Woods, 2008) to quantify the motion of cloud features between pairs of images. The associated random error on speed estimates is 12 m/s in the northern polar region and 9.8 m/s at the south. Assuming that polar cyclones described by Adriani et al. (2018, https://doi.org/10.1038/nature25491) are in rigid motion with respect to System III, tangential speeds in the interior of the vortices increase linearly with distance from the center. The annulus of maximum speed for the main circumpolar cyclones is located at approximatively 1,000 km from their centers, with peak cyclonic speeds typically between 80 and 110 m/s and ~50 m/s in at least two cases. Beyond the annulus of maximum speed, tangential speed decreases inversely with the distance from the center within the Southern Polar Cyclone and somewhat faster within the Northern Polar Cyclone. A few small areas of anticyclonic motions are also identified within both polar regions. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113736
Appears in Collections:气候减缓与适应

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作者单位: Istituto di Astrofisica e Planetologia Spaziali-Istituto Nazionale di Astrofisica, Rome, Italy; Istituto di Scienze Atmosferiche e del Clima, Consiglio Nazionale delle Ricerche, Sede di Roma, Italy; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; California Institute of Technology, Pasadena, CA, United States; Planetary Science Institute, Tucson, AZ, United States; Istituto di Scienze Atmosferiche e del Clima, Consiglio Nazionale delle Ricerche, Sede di Bologna, Bologna, Italy; Southwest Research Institute, San Antonio, TX, United States; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY, United States; Agenzia Spaziale Italiana, Sede di Roma, Rome, Italy; Agenzia Spaziale Italiana, Sede di Matera, Matera, Italy

Recommended Citation:
Grassi D.,Adriani A.,Moriconi M.L.,et al. First Estimate of Wind Fields in the Jupiter Polar Regions From JIRAM-Juno Images[J]. Journal of Geophysical Research: Planets,2018-01-01,123(6)
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