REGULAR AND IRREGULAR BAROCLINIC WAVES IN A MARTIAN GENERAL-CIRCULATION MODEL - A ROLE FOR DIURNAL FORCING by Collins, M, Lewis, S, Read, P

“…Simulations with diurnally-averaged insolation are found to develop highly regular baroclinic transients during northern hemisphere autumn, winter and spring seasons, characterized by zonal wavenumber 1 or 2 and periods of 2-6 sols (a sol being a Martian day). …”

Saturn's emitted power by Li, L, Conrath, B, Gierasch, P, Achterberg, R, Nixon, C, Simon-Miller, A, Flasar, F, Banfield, D, Baines, K, West, R, Ingersoll, A, Vasavada, A, Del Genio, A, Porco, C, Mamoutkine, A, Segura, M, Bjoraker, G, Orton, G, Fletcher, L, Irwin, P, Read, P

“…The emitted power is 16.6% higher in the Southern Hemisphere than in the Northern Hemisphere. From 2005 to 2009, the global mean emitted power and effective temperature decreased by ∼2% and ∼0.5%, respectively. …”

Mapping potential-vorticity dynamics on Jupiter. I: Zonal-mean circulation from Cassini and Voyager 1 data by Read, P, Gierasch, P, Conrath, B, Simon-Miller, A, Fouchet, T, Yamazaki, Y

“…The relationship of lateral gradients of IPV and QGPV with the corresponding mean zonal flows indicate that the northern hemisphere may be closer to marginal stability with respect to Arnol'd's second stability theorem than the southern hemisphere. © Royal Meteorological Society, 2006.…”

The solsticial pause on Mars: 1. A planetary wave reanalysis by Lewis, S, Mulholland, D, Read, P, Montabone, L, Wilson, R, Smith, M

“…Transient waves are largest throughout the northern hemisphere autumn, winter and spring period and almost absent during the summer. …”

Low-order dynamical behavior in the martian atmosphere: Diagnosis of general circulation model results by Martinez-Alvarado, O, Moroz, I, Read, P, Lewis, SR, Montabone, L

“…In this article we focus on a time series of the interval between autumn and winter in the northern hemisphere, when baroclinic activity is intense. …”

Polar vortices on Earth and Mars: A comparative study of the climatology and variability from reanalyses by Mitchell, D, Montabone, L, Thomson, S, Read, P

“…Unlike on Earth, it is found that the Martian polar vortices are annular, and that the Northern Hemisphere vortex is far stronger than its southern counterpart. …”

Assessing atmospheric predictability on Mars using numerical weather prediction and data assimilation by Rogberg, P, Read, P, Lewis, SR, Montabone, L

“…The intra-ensemble growth rates confirm earlier stand-alone model results, indicating that internal baroclinic transients lead to significant chaotic growth of model 'error' on time-scales of 3-10 sols only during NorthernHemisphere autumn and winter seasons. At other seasons, ensembles retain coherence at least over several tens of sols. …”

The solsticial pause on Mars: 2 modelling and investigation of causes by Mulholland, D, Lewis, S, Read, P, Madeleine, J, Forget, F

“…The zonal topographic asymmetry appears to be the primary reason for the weakness of eddy activity in the southern hemisphere relative to the northern hemisphere, and the ultimate cause of the solsticial pause in both hemispheres. …”

Martian dust lifting, transport and associated processes by Mulholland, D

“…These dust storms were realistic in many respects, and the observed global dust storm frequency of occurrence of roughly one in every three years was approximately reproduced by the model, but an artificial threshold decrease rate was required to maintain dust lifting on a multiannual timescale - this was believed to be due to inaccuracies in the net cross-equatorial dust flux, which showed a strong bias towards the northern hemisphere. Significant changes were seen in model dust lifting rates when the influence of a heterogeneous surface roughness length was included in the wind stress scheme, and the need for more sophisticated sub-gridscale methods in future dust lifting schemes, to cope with this and other effects, was noted. …”

Cassini Saturn polar velocity fields by Antuñano, A, del Río Gaztelurrutia, T, Hueso, R, Read, P, Sanchez-Lavega, A

“…As fully described in that paper, these measurements were derived from sets of Cassini Orbiter Imaging Sub-System (ISS) Wide Angle Camera (WAC) and Narrow Angle Camera (NAC) images using the continuum band CB2 and CB3 filters, acquired for the northern hemisphere in June 2013 and for the southern hemisphere using WAC CB2 and CB3 images taken in October 2006 and December 2008. …”