DynVar Intraseasonal
DynVar Intraseasonal addresses issues of stratosphere-troposphere coupling on intraseasonal timescales (timescales of 10–100 days). This theme will focus on high-top simulations of stratospheric sudden warmings, annular mode propagation signals, stratosphere-troposphere interactions forced from the surface, and so on. The emphasis will be on dynamical analysis of the stratosphere-troposphere interactions present in these models and on the implications for the practical problem of seasonal prediction.
DynVar Intraseasonal subprojects that have been proposed to date include diagnosis of stratospheric sudden warmings and their tropospheric signatures, analysis of the transient response to snow forcing, and a study of the coupling between the North Atlantic Oscillation and the lower stratospheric circulation.