A5073574448- Climate variability and models
- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Geological formations and processes
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Acute Ischemic Stroke Management
- Coastal wetland ecosystem dynamics
- Cerebrovascular and Carotid Artery Diseases
- Underwater Acoustics Research
- Intracranial Aneurysms: Treatment and Complications
- Ancient Mediterranean Archaeology and History
- Oceanographic and Atmospheric Processes
- Geophysics and Gravity Measurements
- Precipitation Measurement and Analysis
- Archaeological Research and Protection
- Archaeology and Historical Studies
- Integrated Energy Systems Optimization
- Tropical and Extratropical Cyclones Research
ETH Zurich
1983-2023
GFZ Helmholtz Centre for Geosciences
1997
Johannes Gutenberg University Mainz
1987
Abstract. The term “pseudo-global warming” (PGW) refers to a simulation strategy in regional climate modeling. consists of directly imposing large-scale changes the system on control (usually representing current conditions) by modifying boundary conditions. This differs from traditional dynamic downscaling technique where output global model (GCM) is used drive models (RCMs). PGW are usually derived transient simulation. approach offers several benefits, such as lowering computational...
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...
We analyze a multi-model ensemble at convection-resolving resolution based on the DYAMOND models and limited-area model COSMO over 40 days to study how tropical subtropical marine low clouds are represented kilometer-scale resolution.
Abstract Clouds over tropical oceans are an important factor in the Earth's response to increased greenhouse gas concentrations, but their representation climate models is challenging due small‐scale nature of involved convective processes. We perform two 4‐year‐long simulations at kilometer‐resolution (3.3 km horizontal grid spacing) with limited‐area model COSMO Atlantic on a 9,000 × 7,000 2 domain: A control simulation under current conditions driven by ERA5 reanalysis, and change...
Abstract. The term pseudo-global warming (PGW) refers to a simulation strategy in regional climate modeling. consists of directly imposing large-scale changes the system on control (usually representing current conditions) by modifying boundary conditions. This differs from traditional dynamic downscaling technique where output global model (GCM) is used drive models (RCM). PGW are usually derived transient simulation. approach offers several benefits such as lowering computational...
The northern basin of the Dead Sea is occupied by a ∼300‐m‐deep lake. A series cores in deep‐water part lake provide information about top 365 cm sediments. were correlated with high‐resolution 3.5‐kHz seismic profiles from this area and lithologic age constraints for reflection data. Visual comparison two data sets shows that strong surface shallow subsurface reflectors (A B) correlate to massive salt at seafloor indurated base cores, respectively. Calculations an average velocity based on...
Estimates of the tropical cloud feedback global climate models (GCMs) show a large inter-model spread due to small-scale nature convective processes.Estimates from large-eddy simulations (LES) are more consistent among themselves, but difficult scale system.Here we consider compromise between GCMs and LES, study how clouds over Atlantic respond realistic perturbation in kilometer-resolution model.We perform two 4-year-long at 3.3 km horizontal grid spacing with limited-area model COSMO on...
Clouds over tropical oceans are an important factor in Earth’s response to increased greenhouse gas concentrations, but their representation climate models is challenging due the small-scale nature of involved convective processes. We perform two 4-year-long simulations at kilometer-resolution (3.3 km horizontal grid spacing) with limited-area model COSMO Atlantic on a 9000x7000 km2 domain: A control simulation under current conditions driven by ERA5 reanalysis, and change scenario using...
Abstract Estimates of the tropical cloud feedback global climate models (GCMs) show a large inter‐model spread due to small‐scale nature convective processes. from large‐eddy simulations (LES) are more consistent among themselves, but difficult scale system. Here we consider compromise between GCMs and LES, study how clouds over Atlantic respond perturbation in regional kilometer‐resolution model. We perform two 4‐year‐long at 3.3 km horizontal grid spacing with limited‐area model COSMO on...
<p>Even though the complexity and resolution of global climate models (GCMs) has increased over last decades, inter-model spread equilibrium sensitivity not narrowed. The representation subtropical low-level clouds their associated radiative feedbacks in still poses a major challenge. A fundamental problem underlying simulation such is multiscale nature. On one hand, current GCMs allow to capture large-scale processes but are too coarse represent mesoscale microscale dynamical...
<p>Even though the complexity and resolution of global climate models has increased over last decades, inter-model spread in equilibrium sensitivity not narrowed. The representation tropical subtropical marine clouds remains a major source uncertainty models. Going to higher model explicitly resolve larger fraction underlying convective circulations is most direct way towards reducing associated with these clouds. Convection-resolving (CRMs) are therefore an attractive...