Mars Environment and Magnetic Orbiter Scientific and Measurement Objectives

Astrobiology Mary Ann Liebert 9:1 (2009) 71-89

Authors:

F Leblanc, B Langlais, T Fouchet, S Barabash, D Breuer, E Chassefire, A Coates, V Dehant, F Forget, H Lammer, S Lewis, M Lopez-Valverde, M Mandea, M Menvielle, A Pais, M Paetzold, P Read, C Sotin, P Tarits, S Vennerstrom

Synchronization of modulated traveling baroclinic waves in a periodically forced, rotating fluid annulus.

Phys Rev E Stat Nonlin Soft Matter Phys 79:1 Pt 2 (2009) 015202

Authors:

FJR Eccles, PL Read, AA Castrejón-Pita, TWN Haine

Abstract:

Frequency entrainment and nonlinear synchronization are commonly observed between simple oscillatory systems, but their occurrence and behavior in continuum fluid systems are much less well understood. Motivated by possible applications to geophysical fluid systems, such as in atmospheric circulation and climate dynamics, we have carried out an experimental study of the interaction of fully developed baroclinic instability in a differentially heated, rotating fluid annulus with an externally imposed periodic modulation of the thermal boundary conditions. In quasiperiodic and chaotic amplitude-modulated traveling wave regimes, the results demonstrate a strong interaction between the natural periodic modulation of the wave amplitude and the externally imposed forcing. This leads to partial or complete phase synchronization. Synchronization effects were observed even with very weak amplitudes of forcing, and were found with both 1:1 and 1:2 frequency ratios between forcing and natural oscillations.

The snowball Earth aftermath: Exploring the limits of continental weathering processes

Earth and Planetary Science Letters Elsevier 277:3-4 (2009) 453-463

Authors:

Guillaume Le Hir, Yannick Donnadieu, Yves Goddéris, Raymond T Pierrehumbert, Galen P Halverson, Mélina Macouin, Anne Nédélec, Gilles Ramstein

FLUID DYNAMICS Rotating convection on the edge

NATURE 457:7227 (2009) 270-271

QUAGMIRE v1.3: a quasi-geostrophic model for investigating rotating fluids experiments

GEOSCIENTIFIC MODEL DEVELOPMENT 2:1 (2009) 13-32

Authors:

PD Williams, TWN Haine, PL Read, SR Lewis, YH Yamazaki