The relationship between the Madden-Julian oscillation and the quasi-biennial oscillation: Observations and Global Climate Models
Martes 30 de junio 17:00 PM hora de México
IMPARTE: Dr. Zane Karas Martin┃Colorado State University
Inscripción previa (Cupo limitado)
Recent observational studies have demonstrated a strong and surprising link between two key modes of tropical variability: the Madden-Julian oscillation (MJO) and the stratospheric quasi-biennial oscillation (QBO). After briefly reviewing these two phenomena, we discuss the main components of the MJO-QBO relationship, including the key takeaway that when QBO winds in the lower stratosphere are easterly, the MJO tends to be stronger and more predictable during boreal winter. We then present results from a series of studies using global climate models to explore whether the observed MJO-QBO link can be captured in models. In a variety of different model types and experiments, we find that models struggle to clearly demonstrated the strong observed link. The continuing challenge of realistically capturing the MJO-QBO link for a wide range of models is discussed, as well as the implications for the observed relationship and possible directions for future work on this topic.