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Temperatures and CH_4 mixing ratios near the homopause of the 8µm north polar hot spot of Jupiter

Kim, Sang Joon and Geballe, Thomas R. and Greathouse, Thomas K. and Yung, Yuk L. and Miller, Steve and Orton, G. S. and Minh, Y. C. (2017) Temperatures and CH_4 mixing ratios near the homopause of the 8µm north polar hot spot of Jupiter. Icarus, 281 . pp. 281-285. ISSN 0019-1035. doi:10.1016/j.icarus.2016.09.017.

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We have derived homopause temperatures of 180–250 K for the 8-µm north-polar hot spot (8NPHS) of Jupiter by fitting CH_4 emission models to 3 and 8 µm spectra of the 8NPHS obtained 24 days apart in 2013. From the fits, we find that CH_4 mixing ratios at the 8NPHS are consistent with those reported by Kim et al. (2014) in equatorial regions. We propose possible mechanisms to account for the temperature of the 8NPHS homopause, which is relatively cool compared with the temperatures of other auroral regions, including locally-fixed and transient but energetic auroral particle precipitation.

Item Type:Article
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URLURL TypeDescription
Yung, Yuk L.0000-0002-4263-2562
Orton, G. S.0000-0001-7871-2823
Additional Information:© 2016 Elsevier Inc. Available online 13 September 2016. SJK acknowledges support from the Space Core Technology program through NRF funded by the Ministry of Education, Science and Technology, and from KASI under the R&D program supervised by the Ministry of Science, ICT and Future Planning. Support for GSO was provided, in part, by an award from NASA to the Jet Propulsion Laboratory, California Institute of Technology. The research is based in part on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the National Research Council (Canada), CONICYT (Chile), Ministerio de Ciencia, Tecnología e Innovación Productiva (Argentina), and Ministério da Ciência, Tecnologia e Inovação (Brazil).
Group:Astronomy Department
Funding AgencyGrant Number
National Research Foundation of KoreaUNSPECIFIED
Ministry of Science, ICT and Future Planning (Korea)UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)UNSPECIFIED
Ministerio de Ciencia, Tecnología e Innovación ProductivaUNSPECIFIED
Ministério da Ciência, Tecnologia e InovaçãoUNSPECIFIED
Korea Astronomy and Space Science Institute (KASI)UNSPECIFIED
Subject Keywords:Jupiter; Atmosphere; Aurora; Infrared; Spectroscopy
Record Number:CaltechAUTHORS:20161104-101502736
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Official Citation:Sang Joon Kim, Thomas R. Geballe, Thomas K. Greathouse, Yuk L. Yung, Steve Miller, G.S. Orton, Y.C. Minh, Temperatures and CH4 mixing ratios near the homopause of the 8 µm north polar hot spot of Jupiter, Icarus, Volume 281, 1 January 2017, Pages 281-285, ISSN 0019-1035, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71741
Deposited By: Tony Diaz
Deposited On:04 Nov 2016 19:10
Last Modified:11 Nov 2021 04:50

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