The relationship between the Madden-Julian oscillation and the quasi-biennial oscillation: Observations and Global Climate Models

CIENCIAS ATMOSFÉRICAS PARA QUEDARSE EN CASA

SEMINARIO VIRTUAL

Martes 30 de junio 17:00 PM hora de México

IMPARTE: Dr. Zane Karas Martin┃Colorado State University

Inscripción previa (Cupo limitado) 

INSCRIBIRSE

 

Resumen: 

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.

 

Fecha

Jun 30 2020

Horario

5:00 pm - 6:00 pm

Etiquetas

Seminario Institucional