Atmosphere Ocean Science Student Seminar

Annular Modes in the Tropical Atmosphere

Speaker: Kevin DallaSanta, PhD Candidate, Courant Institute

Location: Warren Weaver Hall 1314

Date: Friday, October 26, 2018, 3:45 p.m.

Synopsis:

The extratropical annular modes—zonally coherent fluctuations of geopotential height—have received much attention for their dynamical and predictive utility. However, little attention has been paid to the corresponding phenomenon at low latitudes. I will discuss our recent work on tropical annularity, focusing on its downward-propagating signal, relation to existing modes of variability, and far-field impact. A number of additional results constrain, but do not fully explain, the underlying mechanism.