Joint Seminar: From weather to climate: combining modelling approaches to study the role of convection

From weather to climate: convection, clouds, and precipitation evolve on timescales of ten minutes to several hours. Nevertheless, the latent heating associated with convection can have profound effects on the global atmosphere that, in many cases, are mediated through atmospheric gravity waves or Rossby waves. Gravity waves and Rossby waves, on the other hand, modulate the thermodynamic state of the atmosphere, including convection, which often results in a classic 'chicken and egg' problem. In this presentation I will show how cause and effect can be clearly separated by combining observations and various modelling frameworks, including global targeted SST-driven and air-sea coupled experiments, regional full-physics and dry idealized models, and hybrid approaches. Specifically, I will address how regional models can be used to study the effects of convectively-generated gravity waves on dynamical processes spanning the surface to the middle atmosphere. In a second example, I will summarize recent progress in the understanding of a major global summer teleconnection pattern over Eurasia, the Silk Road Pattern, and its relationship to convection associated with the South Asian monsoon.

Date

07.03.2018

Time

13:30 h

Place

Bundesstr. 53, room 022/023
Seminar Room 022/023, Ground Floor, Bundesstrasse 53, 20146 Hamburg, Hamburg

Speaker

Claudia Stephan, University of Reading

Organizers

Hauke Schmidt

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