Near-Infrared Spectral Analysis of 2007 Jovian North Temperate Belt Disturbance

Details Near-Infrared Spectral Analysis of 2007 Jovian North Temperate Belt Disturbance Near-Infrared Spectral Analysis of 2007 Jovian North Temperate Belt Disturbance

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.p53c..04y&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #P53C-04

Other

5704 Atmospheres (0343, 1060), 5709 Composition (1060), 6220 Jupiter

Scientific paper

Jupiter has been experiencing an era of atmospheric global upheaval since 2005, with various localized and axisymmetric changes occurring all over the planet. We focus on the near-infrared spectra of the North Temperate Belt disturbance (NTBs), at latitude of 22 degrees north. The outbreak, identified late March 2007 as a bright feature high in the atmosphere, quickly encircled the planet in about two months. Near-infrared spectra of the feature were acquired with a medium-resolution near-infrared spectrometer, SpeX, at the NASA/Infra Red Telescope Facility (IRTF) on May 1-2, 2007. The feature dissipated within days thereafter. The 15 x 0.8 arc sec slit spectra were spatially resolved into sub apertures along the spectral slit (1.0 x 0.8 arc sec), allowing us to geometrically register the spectral data for the discrete feature, without losing data integrity. Our preliminary results indicate the presence of ammonia ice, similar to the spectrum of ammonia clouds identified in Galileo/Jupiter data (Baines et al. 2002, Icarus, 159). The strength of the ammonia ice features varies from the localized "head" of the feature along the length of the slit (i.e., longitude). Our results will be compared with the results with (1) spectral analysis of other regions of Jupiter that have not undergone such dramatic changes to determine the differences between them and (2) other spectra obtained from NASA/IRTF and Lick Observatory with The Aerospace Corporation's visible/near-infrared spectrometer VNIRIS to determine the temporal evolution of NTBs disturbance and (3) compare with spectra of other disturbances such as those currently occurring in the South Equatorial Belt (SEB).

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