Cited by 74Astro and Planetary ScienceStellar, planetary, and galactic studiesPlanetary Science and Exploration

Global climate modeling of Saturn’s atmosphere. Part I: Evaluation of the radiative transfer model

Guerlet, S., Spiga, A., Sylvestre, M., Indurain, M., Fouchet, T., Leconte, J., Millour, E., Wordsworth, R. +3 more·2014·Icarus

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Crossref · 10.1016/j.icarus.2014.05.010

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59 of 59 references verified0 citation errors · 0 not checkable

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  • Before 2014, the northern hemisphere had been warming as expected from radiative and dynamical climate models.

    “However, the seasonal evolution in the northern hemisphere was less dramatic: although the north had been warming, as expected from radiative and dynamical climate models13–15, there was no sign of the sharp latitudinal thermal gradients (and hence vertical windshear) that had been associated with the SPSV at the beginning of Cassini’s mission.”
  • Negative windshear dominates poleward of 78°N and p < 1 mbar throughout the time series, because temperatures have always increased towards 90°N despite the sequence starting in polar winter, counter to the expectations of radiative climate models.

    “Negative windshear dominates poleward of 78°N and p < 1 mbar throughout the time series, because temperatures have always increased towards 90°N despite the sequence starting in polar winter, counter to the expectations of radiative climate models12,13,40.”
  • The northern temperature profile is consistent with radiative climate model predictions for 2-100 mbar, while the southern temperature profile is always warmer, even though maximum stratospheric temperatures (~160 K at 0.3-0.5 mbar) are similar at both poles.

    “While the northern T(p) is consistent with these predictions for 2–100 mbar, the southern T(p) is always warmer, even though the maximum stratospheric temperatures (T ~ 160 K at 0.3–0.5 mbar) are similar at both poles.”
  • The warmer southern lower stratosphere hints at a missing source of heat in the radiative model during southern summer, possibly stratospheric aerosols or stronger polar subsidence, the latter supported by excess C2H2 in the SPSV compared to the NPSV.

    “This hints at a missing source of heat in the radiative model for the lower stratosphere during southern summer that was not required in the north at Ls = 88°, maybe due to stratospheric aerosols (radiative) or stronger polar subsidence (adiabatic heating)12,13,25, the latter being supported by the excess C2H2 observed in the SPSV compared to the NPSV in Table 1, discussed below.”
  • Aerosols constitute a significant part of the radiative budget and can introduce a 5-6 K warming effect in the stratosphere.

    “However, aerosols also constitute a significant part of the radiative budget13, which can introduce a 5–6 K warming effect in the stratosphere25.”

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Authors
Guerlet, S., Spiga, A., Sylvestre, M., Indurain, M., Fouchet, T., Leconte, J., Millour, E., Wordsworth, R., Capderou, M., Bézard, B., & Forget, F.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • University of Chicago (US)
Corresponding author
Guerlet, S.
Venue
Icarus
Publisher
Elsevier BV
Published
2014-08
Volume
238
Pages
110-124
ISSN
0019-1035 (ISSN-L)
OpenAlex
W2059239785
Cited by
73
References
59
Citations by year
2026: 1 · 2025: 3 · 2024: 10 · 2023: 5 · 2022: 3 · 2021: 6 · 2020: 10 · 2019: 7 · 2018: 11 · 2017: 2 · 2016: 4 · 2015: 10 · 2014: 1
FWCI
3.05
Type
journal article
Language
en
Open access
closed
Locations
  • Icarus (publishedVersion)
  • Bristol Research (University of Bristol) (publishedVersion)
  • HAL (submittedVersion)
  • Oskar-Bordeaux (Universite de Bordeaux) (submittedVersion)
Funders
Agence Nationale de la Recherche (ANR-12-PDOC-0013)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Planetary Science and Exploration
Keywords
Saturn atmosphere, radiative transfer modeling, radiative-convective model, upper troposphere and stratosphere, Great White Spot, hydrocarbon abundances, aerosol properties, oblateness, radiative equilibrium

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