Work package 1+2 - Characteristics of Organization
Work packages 1 and 2 are based on a close collaboration between the University of Bonn, the Leibniz Institute for Tropospheric Research and the Max Planck Institute for Meteorology. Signatures of convective organizations are investigated using weather radars, geostationary satellites and ICON-LEM simulations.
In a first step, a set of organization indices has been assessed using radar and satellite data as well as a combination of the two.
Work package 3 - Role of Radiation for Convective Organization
Work package 3 revolves around the question if and how radiative transfer influences the formation of clouds on local and larger scales. Explorations with idealized Large-Eddy simulations revealed that radiative heating and cooling, stimulates shallow cumulus cloud dynamics, leading to the formation or destruction of cloud streets.
In work package 4, the role of sub-synoptic scale organization for the large-scale circulation is investigated. This is done by relating the dynamical properties of the convective cells to the degree of convective organization and to the large-scale circulation. Therefore Fourier and wavelet spectra of different quantities are computed to distinguish between different scales and directions of convective cells.
Work package 5 - Parameterization of Convective Organization
Work package 5 addresses the organization characteristics of shallow precipitating convection and its impact on the boundary layer turbulence. The precipitation and the associated organized motions influences the higher order moments of scalar quantities such as the moisture and potential temperature.
Work package 6 focuses on deep convection. It aims at developing a theoretical model to account for the clustering of convection and its potential effects, in particular on the convective variability.