Physical and Statistical Modeling of Saturn's Troposphere

Padmavati A. Yanamandra-Fisher; Amy J. Braverman; Glenn S. Orton

doi:10.1117/12.461068

19 December 2002 Physical and Statistical Modeling of Saturn's Troposphere

Padmavati A. Yanamandra-Fisher, Amy J. Braverman, Glenn S. Orton

Proceedings Volume 4847, Astronomical Data Analysis II; (2002) https://doi.org/10.1117/12.461068
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The 5.2-μm atmospheric window on Saturn is dominated by thermal radiation and weak gaseous absorption, with a 20% contribution from sunlight reflected from clouds. The striking variability displayed by Saturn's clouds at 5.2 μm and the detection of PH₃ (an atmospheric tracer) variability near or below the 2-bar level and possibly at lower pressures provide salient constraints on the dynamical organization of Saturn's atmosphere by constraining the strength of vertical motions at two levels across the disk. We analyse the 5.2-μm spectra of Saturn by utilising two independent methods: (a) physical models based on the relevant atmospheric parameters and (b) statistical analysis, based on principal components analysis (PCA), to determine the influence of the variation of phosphine and the opacity of clouds deep within Saturn's atmosphere to understand the dynamics in its atmosphere.

Citation Download Citation

Padmavati A. Yanamandra-Fisher, Amy J. Braverman, and Glenn S. Orton "Physical and Statistical Modeling of Saturn's Troposphere", Proc. SPIE 4847, Astronomical Data Analysis II, (19 December 2002); https://doi.org/10.1117/12.461068

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