Planetary Climate Dynamics

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Data discrepancies in solar-climate link.

Science American Association for the Advancement of Science (AAAS) 320:5877 (2008) 746
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Causal or casual link between the rise of nannoplankton calcification and a tectonically-driven massive decrease in Late Triassic atmospheric CO2?

Earth and Planetary Science Letters Elsevier 267:1-2 (2008) 247-255

Authors:

Yves Goddéris, Yannick Donnadieu, Colomban de Vargas, Raymond T Pierrehumbert, Gilles Dromart, Bas van de Schootbrugge
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Temperature and composition of Saturn's polar hot spots and hexagon.

Science 319:5859 (2008) 79-81

Authors:

LN Fletcher, PGJ Irwin, GS Orton, NA Teanby, RK Achterberg, GL Bjoraker, PL Read, AA Simon-Miller, C Howett, R de Kok, N Bowles, SB Calcutt, B Hesman, FM Flasar

Abstract:

Saturn's poles exhibit an unexpected symmetry in hot, cyclonic polar vortices, despite huge seasonal differences in solar flux. The cores of both vortices are depleted in phosphine gas, probably resulting from subsidence of air into the troposphere. The warm cores are present throughout the upper troposphere and stratosphere at both poles. The thermal structure associated with the marked hexagonal polar jet at 77 degrees N has been observed for the first time. Both the warm cyclonic belt at 79 degrees N and the cold anticyclonic zone at 75 degrees N exhibit the hexagonal structure.
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Erratum: "Dynamics of convectively driven banded jets in the laboratory" (Journal of the Atmospheric Sciences (2007))

Journal of the Atmospheric Sciences 65:1 (2008) 287

Authors:

PL Read, YH Yamazaki, SR Lewis, PD Williams, R Wordsworth, K Miki-Yamazaki, J Sommeria, H Didelle, AM Fincham
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Synchronization in baroclinic systems

Journal of Physics: Conference Series 137 (2008)

Authors:

AA Castrejón-Pita, PL Read

Abstract:

Synchronization of periodic and chaotic oscillations between two coupled rotating baroclinic fluid systems will be presented. The numerical part of the study involves a pair of coupled two-layer quasigeostrophic models, and the experimental part comprises two thermally coupled baroclinic fluid annuli, rotating one above the other on the same turntable. Phase synchronization and imperfect synchronization (phase slips) have been found in both model and experiments, and model simulations also exhibit chaos-destroying synchronization. © 2008 IOP Publishing Ltd.
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