A5062999653- Climate variability and models
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Groundwater and Isotope Geochemistry
- Geology and Paleoclimatology Research
- Groundwater flow and contamination studies
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Hydrocarbon exploration and reservoir analysis
- Hydrology and Drought Analysis
- Climate Change Policy and Economics
- Plant Water Relations and Carbon Dynamics
- Atmospheric chemistry and aerosols
- Tropical and Extratropical Cyclones Research
- Climate change impacts on agriculture
- Arctic and Antarctic ice dynamics
- Karst Systems and Hydrogeology
- Isotope Analysis in Ecology
- Global Energy and Sustainability Research
- demographic modeling and climate adaptation
- Geological Studies and Exploration
- Medical Imaging Techniques and Applications
- Climate Change and Health Impacts
- Ecosystem dynamics and resilience
ETH Zurich
2013-2024
École Polytechnique Fédérale de Lausanne
1998-2024
Board of the Swiss Federal Institutes of Technology
2018
University of Bern
1998-2006
Swiss Federal Institute of Aquatic Science and Technology
1998-2006
Weatherford College
2001
Abstract. Anthropogenic increases in atmospheric greenhouse gas concentrations are the main driver of current and future climate change. The integrated assessment community has quantified anthropogenic emissions for shared socio-economic pathway (SSP) scenarios, each which represents a different projection political environment. Here, we provide these SSP scenarios – using reduced-complexity climate–carbon-cycle model MAGICC7.0. We extend historical, observationally based concentration data...
Abstract. Atmospheric greenhouse gas (GHG) concentrations are at unprecedented, record-high levels compared to the last 800 000 years. Those elevated GHG warm planet and – partially offset by net cooling effects aerosols largely responsible for observed warming over past 150 An accurate representation of is hence important understand model recent climate change. So far, community efforts create composite datasets with seasonal latitudinal information have focused on marine boundary layer...
Month-long integrations with a regional climate model covering Europe and the Northern Atlantic are utilized to study sensitivity of summertime European precipitation respect continental-scale soil moisture content. Experiments conducted for July 1990 1993. For each two months, control experiment initial water distribution derived from operational ECMWF analysis is compared against experiments dry wet distributions. The results demonstrate that in belt ∼1000 km wide between Mediterranean...
Abstract. The Intergovernmental Panel on Climate Change (IPCC) has accepted the invitation from UNFCCC to provide a special report impacts of global warming 1.5 °C above pre-industrial levels and related greenhouse-gas emission pathways. Many current experiments in, for example, Coupled Model Inter-comparison Project (CMIP), are not specifically designed informing this report. Here, we document design half degree additional warming, projections, prognosis (HAPPI) experiment. HAPPI provides...
Several studies have used the temperature dependence of gas solubilities in water to derive paleotemperatures from noble gases groundwaters. We present a general method infer environmental parameters concentrations dissolved atmospheric water. Our approach incorporates statistical methods quantify uncertainties deduced parameter values. The equilibration temperatures equilibrated with atmosphere under controlled conditions could be inferred precision and accuracy ±0.2°C. lake river samples...
The design, setup, and performance of a mass spectrometric system for the analysis noble gas isotopes (3He, 4He, 20Ne, 21Ne, 22Ne, 36Ar, 40Ar, 84Kr, 136Xe) tritium (3H) from water samples are described. 3H concentration is measured indirectly by 3He ingrowth radioactive decay. After extraction, purification, separation, gases in two noncommercial double-collector 90° magnetic sector spectrometers. We present new approach heavy that enables, principle, simultaneous measurement Ar, Kr, Xe....
Abstract We present a model intercomparison project, LongRunMIP, the first collection of millennial-length (1,000+ years) simulations complex coupled climate models with representation ocean, atmosphere, sea ice, and land surface, their interactions. Standard are generally only few hundred years long. However, modeling long-term equilibration in response to radiative forcing perturbation is important for understanding many phenomena, such as evolution ocean circulation, time-...
Forests can store large amounts of carbon and provide essential ecosystem services. Massive tree planting is thus sometimes portrayed as a panacea to mitigate climate change related impacts. Recent controversies about the potential benefits drawbacks forestation have centered on storage forests local or global thermodynamic Here we discuss how global-scale deforestation Earth's energy balance, thereby affect atmospheric circulation even profound effects ocean circulation. We perform...
To make sound decisions in the face of climate change, government agencies, policymakers and private stakeholders require suitable information on local to regional scales. In Switzerland, development change scenarios is strongly linked adaptation strategy Confederation. The current for Switzerland CH2018 - released form six user-oriented products were result an intensive collaboration between academia administration under umbrella National Centre Climate Services (NCCS), accounting user...
Abstract. This study investigates how warm conveyor belts (WCBs) will change in a future climate. WCBs are strongly ascending airstreams extratropical cyclones that responsible for most of their precipitation. In conjunction with the cloud formation, latent heat is released, which has an impact on potential vorticity distribution and therefore atmospheric circulation middle upper troposphere. Because these other impacts WCBs, it great importance to investigate changes frequencies, regions...
Abstract. Anthropogenic increases of atmospheric greenhouse gas concentrations are the main driver current and future climate change. The Integrated Assessment community quantified anthropogenic emissions for Shared Socioeconomic Pathways (SSP) scenarios, each which represents a different socio-economic projection political environment. Here, we provide concentration these SSP scenarios – using reduced complexity climate-carbon cycle model MAGICC7.0. We extend historical,...
There is a growing research interest in understanding extreme weather the context of anthropogenic climate change, posing requirement for new tailored data products. Here we introduce Climate 20th Century Plus Detection and Attribution project (C20C + D&A), an international collaboration generating product specifically intended diagnosing causes changes uncertainties that diagnosis. The runs multiple dynamical models atmosphere-land system under observed historical conditions as well...
Abstract. In this study, we evaluate a set of high-resolution (25–50 km horizontal grid spacing) global climate models (GCMs) from the High-Resolution Model Intercomparison Project (HighResMIP), developed as part EU-funded PRIMAVERA (Process-based simulation: Advances in high resolution modelling and European risk assessment) project, EURO-CORDEX (Coordinated Regional Climate Downscaling Experiment) regional (RCMs) (12–50 over domain. It is first time that an assessment information using...
Abstract Heat waves such as the one in Europe 2003 have severe consequences for economy, society, and ecosystems. It is unclear whether temperatures could exceeded these anomalies even without further climate change. Developing storylines quantifying highest possible temperature levels challenging given lack of long homogeneous time series methodological framework to assess them. Here, we address this challenge by analysing summer a nearly 5000-year pre-industrial model simulation, performed...
Throughout history, Europe and North America have experienced intense long-lasting droughts with large impacts on society ecosystem such as the recent drought 2018/2019 historical 1540 in Europe, or US Dust Bowl of 1930s. To increase resilience develop adaptation strategies to extreme droughts, it is important understand how dry a worst-case would be long take recover from it. This study introduces evaluates methodological framework generate coherent climate model-based storylines different...
A multitracer study of a small aquifer in northern Switzerland indicates that the atmosphere central Europe cooled by at least 5 degreesC during last glacial period. The relation between oxygen isotope ratios (delta18O) and recharge temperatures reconstructed for this period is similar to present-day one if shift delta18O value oceans ice age taken into account. This similarity suggests delta18O-temperature can be used reconstruct paleoclimate conditions Switzerland. gap calculated...
Abstract. With climate change, extremes such as heatwaves, heavy precipitation events, droughts and extreme fire weather have become more frequent in different regions of the world. It is therefore crucial to further their physical understanding, but due rarity both observational modeling samples, this remains challenging. For numerical simulations, one way overcome under-sampling problem Ensemble Boosting, which uses perturbed initial conditions events an existing reference model simulation...