Progress and problems in large-scale atmospheric dynamics / Issac M. Held -- Theories of baroclinic adjustment and eddy equilibration / Pablo Zurita-Gotor and Richard S. Lindzen -- The thermal stratification of the extratropical troposphere / Tapio Schneider -- Storm track dynamics / Kyle L. Swanson -- Eddy-mediated interactions between low latitudes and the extratropics / Walter A. Robinson -- On the relative humidity of the atmosphere / Raymond T. Pierrehumbert, Hélène Brogniez, and Rémy Roca -- Quasi-equilibrium dynamics of the tropical atmosphere / Kerry Emanuel -- Simple models of ensemble-averaged tropical precipitation and surface wind, given the sea surface temperature / Adam H. Sobel -- Dynamical constraints on monsoon circulations / R. Alan Plumb -- Moist dynamics of tropical convection zones in monsoons, teleconnections, and global warming / J. David Neelin -- Challenges in numerical modeling of tropical circulations / Christopher S. Bretherton -- Challenges to our understanding of the general circulation: abrupt climate change / Richard Seager and David S. Battisti.