A5070210511- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Aeolian processes and effects
- Recycling and Waste Management Techniques
- Microplastics and Plastic Pollution
- biodegradable polymer synthesis and properties
- Icing and De-icing Technologies
- Methane Hydrates and Related Phenomena
- Isotope Analysis in Ecology
- Epoxy Resin Curing Processes
- Polymer composites and self-healing
- Mercury impact and mitigation studies
- Lignin and Wood Chemistry
- Climate variability and models
- Winter Sports Injuries and Performance
- Heavy metals in environment
- Climate change and permafrost
- Lichen and fungal ecology
Swiss Federal Institute for Forest, Snow and Landscape Research
2019-2023
ETH Zurich
2013-2022
Microplastics (MPs) are ubiquitous, and considerable quantities prevail even in the Arctic; however, there large knowledge gaps regarding pathways to North. To assess whether atmospheric transport plays a role, we analyzed snow samples from ice floes Fram Strait. For comparison, investigated remote (Swiss Alps) populated (Bremen, Bavaria) European sites. MPs were identified by Fourier transform infrared imaging 20 of 21 samples. The MP concentration Arctic was significantly lower (0 14.4 ×...
Abstract Understanding the impact of melting on preservation atmospheric compounds in high‐Alpine snow and glacier ice is crucial for future reconstruction past conditions. However, detailed studies investigating melt‐related changes such proxy information are rare. Here we present a series five pit profiles 6 major ions 34 trace elements at Weissfluhjoch, Switzerland, collected between January June 2017. Atmospheric composition was preserved during cold season, while toward summer resulted...
Abstract. Saharan dust outbreaks have profound effects on ecosystems, climate, human health, and the cryosphere in Europe. However, spatial deposition pattern of is poorly known due to a sparse network ground measurements. Following extreme event February 2021 across Europe, citizen science campaign was launched sample snow over Pyrenees European Alps. This somewhat improvised triggered wide interest since 152 samples were collected from Pyrenees, French Alps, Swiss Alps less than 4 weeks....
Abstract. Saharan dust outbreaks have profound effects on ecosystems, climate, human health and the cryosphere in Europe. However, spatial deposition pattern of is poorly known due to a sparse network ground measurements. Following extreme event February 2021 across Europe, citizen science campaign was launched sample snow over Pyrenees European Alps. This somewhat improvised triggered wide interest since 152 samples were collected Pyrenees, French Alps Swiss less than four weeks. An...
Earth's snowpack hosts chemical impurities that exchange with the overlying air, strongly impacting atmospheric chemistry. Being embedded in firn and glacier ice formed from surface snow, provide basis for reconstructing past composition core records. The location of these impurity compounds within snow critically controls their reactivity preservation. Ammonium (NH4+) determines acid-base equilibria buffer capacity is a fundamental ice-core proxy, especially biogenic, forest fire,...
Hydrogen peroxide is a primary atmospheric oxidant significant in terminating gas-phase chemistry and sulfate formation the condensed phase. Laboratory experiments have shown an unexpected oxidation acceleration by hydrogen grain boundaries. While boundaries are frequent natural snow ice known to host impurities, it remains unclear how which extent enters this reservoir. We present first experimental evidence for diffusive uptake of into directly from gas machined novel flow reactor system...
Abstract. Earth's snow cover is very dynamic on diurnal timescales. The changes to the structure during this metamorphism have wide-ranging impacts processes such as avalanche formation and capacity of surface exchange trace gases with atmosphere. Here, we investigate influence dry metamorphism, which involves fluxes water vapour, chemical reactivity bromide in snow. To end, heterogeneous reactive loss ozone dark at a concentration 5×1012–6×1012 molec. cm−3 investigated artificial,...
Abstract Stable water isotopes are used as a paleothermometer in ice cores for climate reconstructions over the past millennia. The underlying physical processes involved isotope‐temperature relation, however, unfold at much shorter timescales. Here, we study temporary archival of frontal passages seasonal Alpine snow cover. We combine five profiles sampled winter 2017 Weissfluhjoch with quantitative layer age reconstruction and atmospheric reanalysis data to characterize circulation clouds...
Abstract. Earth's snow cover is very dynamic on diurnal time scales. The changes to the structure during this metamorphism have wide ranging impacts such as avalanche formation and capacity of surface exchange trace gases with atmosphere. Here, we investigate influence dry metamorphism, which involves fluxes water vapor, chemical reactivity bromide in snow. For this, heterogeneous reactive loss ozone at a concentration 5–6 x 1012 molecules cm-3 investigated artificial, shock-frozen samples...