期刊
GEOPHYSICAL RESEARCH LETTERS
卷 44, 期 11, 页码 5345-5354出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL073529
关键词
aurora; stratosphere; Juno
资金
- National Aeronautics and Space Administration [NNH14CK55B]
- NASA Postdoctoral Program
- NASA
- Royal Society Fellowship at the University of Leicester
- Science and Technology Facilities Council
- Grants-in-Aid for Scientific Research [15K17769] Funding Source: KAKEN
- Science and Technology Facilities Council [ST/N000722/1, ST/N00082X/1, 1338302, ST/K00106X/1, ST/N000749/1] Funding Source: researchfish
- STFC [ST/N000749/1, ST/N00082X/1, ST/K00106X/1, ST/N000722/1] Funding Source: UKRI
We present retrievals of the vertical temperature profile of Jupiter's high latitudes from Infrared Telescope Facility-Texas Echelon Cross Echelle Spectrograph measurements acquired on 10-11 December 2014 and 30 April to 1 May 2016. Over this time range, 1mbar temperature in Jupiter's northern and southern auroral regions exhibited independent evolution. The northern auroral hot spot exhibited negligible net change in temperature at 1mbar and its longitudinal position remained fixed at 180 degrees W (System III), whereas the southern auroral hot spot exhibited a net increase in temperature of 11.1 5.2K at 0.98mbar and its longitudinal orientation moved west by approximately 30 degrees. This southern auroral stratospheric temperature increase might be related to (1) near-contemporaneous brightening of the southern auroral ultraviolet/near-infrared H3+ emission measured by the Juno spacecraft and (2) an increase in the solar dynamical pressure in the preceding 3days. We therefore suggest that 1mbar temperature in the southern auroral region might be modified by higher-energy charged particle precipitation.
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