5–7 May 2021
virtual
Europe/Copenhagen timezone

Extreme precipitation scaling, rain cell sizes, and the role of cold pools, and their relation to climate change

5 May 2021, 16:00
1h 45m
virtual

virtual

Interactive presentation Modelling and Parameterising Deep Convective Organisation Modelling and Parameterising Deep Convective Organisation

Speaker

Geert Lenderink (KNMI and TUD)

Description

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 pool dynamics appear to play a key role in this process. Understanding the physics behind scaling rates, and the role of cloud feedbacks, is of utmost importance to estimate how precipitation extremes may change in future climate. In this presentation, I will discuss super CC scaling rates from surface and radar observations and convection permitting model simulations, and understanding from the recent large set of Large Eddy Simulation results under different climate conditions.

Primary authors

Geert Lenderink (KNMI and TUD) Mr Kai Lochbihler (KNMI and TUD) Prof. Pier Siebesma (TUD and KNMI)

Presentation materials