Abstract: The relationship between blocking events in the Atlantic and Pacific sectors of the Northern Hemisphere midlatitudes is investigated in a Vautard?Legras two-layer quasigeostrophic channel model with two sectors, each sector ...

Abstract: Teleconnections between the midlatitudes of the Northern and Southern Hemispheres are diagnosed in National Centers for Environmental Prediction?National Center for Atmospheric Research reanalysis data and separately in ...

Abstract: Because of position errors traditional methods of data assimilation can broaden and weaken jets or other flow structures leading to reduced forecast skill. Here a technique to assimilate properties of coherent structures ...

Abstract: The potential use of chaos synchronization techniques in data assimilation for numerical weather prediction models is explored by coupling a Lorenz three-variable system that represents ?truth? to another that represents ...