IGPP Seminar Series

Understanding controls on tropical convective margins and their variability Co-authors: Benjamin R. Lintner and J. David Neelin

by Ben Lintner
IGPP, ATMOS

Abstract

As transition zones between strongly-convecting and nonconvecting regimes, the near-edge environments of tropical convection zones—or convective margins—are subject to significant variability on multiple timescales. The sensitivity of tropical convective margins to climate perturbations, including projected anthropogenic climate change, underscores the need to understand the interplay of dynamics and thermodynamics controlling convective margin variability. Here, a prototype is developed to describe the behavior of idealized convective margins for regions of low-level inflow from a dry region into an adjacent convection zone. As illustrations of its utility, the prototype is applied to analysis of regional El Niño/Southern Oscillation (ENSO) precipitation teleconnections over equatorial South America and high-frequency inflow-moisture-precipitation relationships along the South Pacific and South Atlantic Convergence Zones. In-progress and planned extensions and related diagnostics, including those of potential relevance to model evaluation, bias mitigation, and intercomparison, are also discussed.
Tuesday, 20 January 2009
3853 Slichter Hall
Refreshments at 3:45 PM
Lecture at 4:00 PM