Boundary-Layer Control on Convective Self-Aggregation

Da YANG

Presentation information

[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS03] Large-scale moisture and organized cloud systems

Tue. May 28, 2019 1:45 PM - 3:15 PM 104 (1F)

convener:Hiroaki Miura(The University of Tokyo), Atsushi Hamada(University of Toyama), Satoru Yokoi(Japan Agency for Marine-Earth Science and Technology), Masaki Satoh(Atmosphere and Ocean Research Institute, The University of Tokyo), Chairperson:Hiroaki Miura

1:45 PM - 2:00 PM

[AAS03-01] Boundary-Layer Control on Convective Self-Aggregation

★Invited Papers

*Da YANG^1,2 (1.University of California, Davis, 2.Lawrence Berkeley National Laboratory)

Keywords:Convection, Boundary layer, Self-aggregation

The atmosphere can self-organize into overturning circulations over an ocean surface with uniform temperature in cloud-resolving models. The upwelling branch is associated with humid air and deep convection; the downwelling branch is associated with dry air and clear sky. This phenomenon is referred to as convective self-aggregation, and understanding this phenomenon can advance our understanding of the Madden-Julian Oscillation (MJO). In this talk, I will introduce a boundary-layer centric framework for self-aggregation. This framework helps explain what leads to self-aggregation, and what sets the spatial scale of self-aggregation.

Reference:
1. Yang, D., 2018: JAS, https://doi.org/10.1175/JAS-D-17-0150.1
2. Yang, D., 2018: JAMES, https://doi.org/10.1029/2017MS001261