Conveners
Physical Mechanisms in Organisation: Part 1
- Bettina Meyer
Physical Mechanisms in Organisation: Part 2
- Steven Krueger (University of Utah)
Physical Mechanisms in Organisation: Discussion
- Brian Mapes (University of Miami/RSMAS, Miami, FL)
We present results of radiative convective equilibrium experiments using the WRF model coupled to an interactive slab ocean model, for which a relaxation term removes energy to constrain the domain mean sea surface temperature (SST) to a target value. Using an adjustment timescale of one minute, drift in the mean temperature is constrained and the impact of the slab ocean is only through the...
In a general circulation model (ECHAM6) configured to represent radiative-convective equilibrium coupled to a slab ocean, we explore a wide range of CO$_2$ concentrations. We obtain reliable statistical quantities from thousand-year-long simulations, and we characterize the horizontal scale of ascending and subsiding regions by the so-called integral length scale of the vertical velocity field...
A series of cloud-resolving model experiments is used to investigate the response of convection to imposed large-scale subsidence. Subsidence is favorable to convective aggregation in a non-linear fashion. In our model configuration, the radiative-convective equilibrium exhibits scattered convection and this non-aggregated stationary state exists also for weak subsidence. For large subsidence,...
Dependencies of observed (sub)hourly rainfall on near surface dew point temperature show relations exceeding the Clausius-Clapeyron relation. Those so-called super CC scaling rates can be only sustained when sufficient moisture is provided to cloud systems by dynamical feedbacks. Large eddy simulation clearly show a tendency to produce large cloud structures under warmer conditions, and cold...
In idealized cloud-resolving models, convective self-aggregation develops from small dry patches that expand until they cover a large fraction of the domain. This study investigates mechanisms that control the timescale of transition from a non-organized to an organized state, as a first crucial step to potentially connect idealized simulations with observations of the real atmosphere....
Every year during premonsoon season, the eastern parts of the Indian subcontinent experiences severe thunderstorms. These mesoscale convective storms are locally known as ‘Kalbaishakhi’ or ‘nor’westers’. To forecast these organized storms with sufficient lead time it is important to know the convective initiation processes responsible for triggering these organized cloud formations. ARW-WRF...
