A5010987318- Meteorological Phenomena and Simulations
- Climate variability and models
- Fluid Dynamics and Turbulent Flows
- Tropical and Extratropical Cyclones Research
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Fire effects on ecosystems
- demographic modeling and climate adaptation
- Atmospheric and Environmental Gas Dynamics
- Aeolian processes and effects
- Wind and Air Flow Studies
- Flood Risk Assessment and Management
- Atmospheric aerosols and clouds
- Precipitation Measurement and Analysis
- Hydrology and Watershed Management Studies
ETH Zurich
2018-2020
University of Leeds
2016
Goethe University Frankfurt
2016
Currently major efforts are underway toward refining the horizontal resolution (or grid spacing) of climate models to about 1 km, using both global and regional (GCMs RCMs). Several groups have succeeded in conducting kilometer-scale multiweek GCM simulations decadelong continental-scale RCM simulations. There is well-founded hope that this increase represents a quantum jump modeling, as it enables replacing parameterization moist convection by an explicit treatment. It expected will improve...
Abstract The “gray zone” of convection is defined as the range horizontal grid-space resolutions at which convective processes are partially but not fully resolved explicitly by model dynamics (typically estimated from a few kilometers to hundred meters). representation these scales challenging, both parameterizing or relying on resolve them might cause systematic biases. Here, regional climate over large European domain used study biases when either using parameterizations deep and shallow...
Abstract On summertime fair-weather days, thermally driven wind systems play an important role in determining the initiation of convection and occurrence localized precipitation episodes over mountainous terrain. This study compares mechanisms development within a flow idealized double-ridge system large-eddy (LESs) convection-resolving (CRM) simulations. First, LES at horizontal grid spacing 200 m is employed to analyze developing circulations associated clouds precipitation. Second, CRM...
Convection‐resolving models (CRMs) are established as a solid framework to simulate moist convection in both numerical weather prediction and regional‐scale climate projections. However, capturing the different scales of governing processes is challenging. Previous studies have shown that size properties individual clouds updraughts do not converge until horizontal grid spacings (Δ x ) (100 m). We refer this structural convergence . On other hand, few recent demonstrated domain‐averaged...
Abstract Currently, major efforts are under way to refine the horizontal resolution of weather and climate models kilometer-scale grid spacing (Δx). Besides refining representation atmospheric dynamics enabling use explicit convection, this will also provide higher in orography. This study investigates influence these increments on simulation orographic moist convection. Nine days fair-weather thermally driven flow over Alps analyzed. Two sets simulations with COSMO model compared, each...
Hail is by far the greatest contributor worldwide to insured losses from severe convective storms on an annual basis. Individual outbreaks can cause well above EUR 1 bn. In Italy, storm have been dominating market in last 5-7 years, with a record of 1.4 bn 2019 prior year 2023. On 18-25 July 2023 unprecedented outbreak brought large hail and strong winds Lombardy, Veneto, Friuli-Venezia Giulia, Piedmont Emilia-Romagna, affected cities including Parma, Turin, Milan Venice. There were many...
Hail is by far the greatest contributor to insured losses from severe convective storms on an annual basis. Individual storm outbreaks can cause hail well above EUR 1 bn. In May and June 2022 a series of such events impacted France, Germany Belgium. Of these, those occurring 19-22 were particularly damaging as they hit large metropolitan region Ile-de-France. There many reports hailstones, causing significant damage property motor vehicle. Total loss estimates in France alone exceeded 2.4...
<p>Hail is by far the greatest contributor to insured losses from severe convective storms on an annual basis. Individual storm outbreaks can cause hail well above EUR 1 bn. On 19-22 June 2022 a series of such events impacted France, and in particular large metropolitan region Ile-de-France. There were many reports hailstones, causing significant damage property motor vehicle. Total loss estimates France alone exceeded 2.4 bn, which 1.34 bn 1.08 vehicle loss. These largest...
<p>Ten years ago, we studied 101 (1910-2010) of wind observations at five stations spread throughout the Netherlands, and representative a wider area in Europe containing regions dense exposure. The raw speed data were homogenised using detailed station metadata to account for changes observation practises, then processed form windstorm loss index timeseries. Our analysis found large annual storm losses multidecadal timescales, with two minima occurring 1960s 2000s. more recent...