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Development of shear-awareness in the representation of convective cloud systems
Deep convection parameterizations are generally not designed to account for the presence of wind shear. And yet we know from many observations and modelling tudies that shear has a marked effect on convection, and can lead to the development of organized systems. Organization of deep convection in the atmosphere can take many forms. In this project the focus is on squall-line features that develop in idealized cloud-resolving simulations in the presence of an imposed shear profile.
This project aims to identify a number of representative wind profiles, and to perform numerical experiments to establish how properties of the convective ensemble change with respect to a no-shear reference case. The project also investigates how these effects might be represented in a parametrization.
Some links for this work:
Publications:
1, A paper constructing a climatology of tropical wind shear profiles by clustering climate model data.2. PhD thesis by Mark Muetzelfeldt.
Talks:
1. A talk on making convection schemes shear-aware, (presented by Mark Muetzelfeldt), at the CPCC convection parameterization conference in Exeter.Posters:
1. A poster on effects of shear on organization and variability, (presented by Mark Muetzelfeldt), at a convective parameterization conference in Delft.2. A poster on effects of shear on cloud fields, (presented by Mark Muetzelfeldt), at a Met Office academic partnership meeting.