Below you can find a list of the main contributions I have presented at international scientific conferences, either as oral presentations or posters. All contributions listed here were presented with me as first author; contributions where I am listed only as a co-author are not included.
2025
Non-target screening analysis on ice and snow samples: a new opportunity to discover novel marine primary productivity ice-core proxies (Poster) Conference
Svalbard Science Conference, Oslo 2025.
@conference{nokey,
title = {Non-target screening analysis on ice and snow samples: a new opportunity to discover novel marine primary productivity ice-core proxies (Poster) },
year = {2025},
date = {2025-09-25},
urldate = {2025-09-25},
organization = {Svalbard Science Conference, Oslo},
abstract = {While more than 100,000 different organic compounds exist, only a few dozen are commonly targeted in environmental studies, limiting our understanding of key climate and environmental processes. Today, thanks to the development of highly sensitive high-resolution mass spectrometers and non-target screening workflows, it is possible to achieve a broader and more comprehensive characterization of environmental samples by identifying thousands of different compounds.
Here, we present two pioneering approaches and preliminary results leveraging non-target screening analysis of snow samples for two distinct objectives: (1) developing new proxies for the reconstruction of marine productivity, and (2) achieving an holistic characterization of environmental pollution by identifying a broader set of organic contaminants.
These results open up promising avenues for the chemical characterization of the Svalbard and Arctic cryosphere, from long-term reconstructions of marine productivity to enhanced monitoring of organic pollution, as well as the study of long-range transport mechanisms from lower latitudes to Svalbard.
Finally, the integration of these techniques in Svalbard holds strong potential for strategic interdisciplinary collaborations with research institutions based in Ny-Ålesund, particularly those involved in marine ecology, snow, and atmospheric research, paving the way for future partnerships and scientific advancements.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Here, we present two pioneering approaches and preliminary results leveraging non-target screening analysis of snow samples for two distinct objectives: (1) developing new proxies for the reconstruction of marine productivity, and (2) achieving an holistic characterization of environmental pollution by identifying a broader set of organic contaminants.
These results open up promising avenues for the chemical characterization of the Svalbard and Arctic cryosphere, from long-term reconstructions of marine productivity to enhanced monitoring of organic pollution, as well as the study of long-range transport mechanisms from lower latitudes to Svalbard.
Finally, the integration of these techniques in Svalbard holds strong potential for strategic interdisciplinary collaborations with research institutions based in Ny-Ålesund, particularly those involved in marine ecology, snow, and atmospheric research, paving the way for future partnerships and scientific advancements.
Non-target screening of a European ice core reveals anthropogenic activities have altered atmospheric organic aerosol composition (Talk) Conference
19th International Conference on Chemistry and the Environment, Belgrade 2025.
@conference{nokey,
title = {Non-target screening of a European ice core reveals anthropogenic activities have altered atmospheric organic aerosol composition (Talk)},
year = {2025},
date = {2025-06-15},
urldate = {2025-06-15},
organization = {19th International Conference on Chemistry and the Environment, Belgrade},
abstract = {Non-target screening (NTS) enables the investigation of a broader chemical space by identifying up to thousands different molecules in environmental samples. When applied to present-day atmospheric aerosol or snow samples, NTS has revealed the occurrence of hundreds of currently unmonitored organic pollutants, allowing for a more comprehensive characterization of atmospheric organic pollution. However, these studies do not allow for temporal retrospective analyses making it difficult to understand how atmospheric organic pollution has evolved over the last centuries and how human activities have perturbed the chemical composition of organic aerosols (OA). Integrating NTS into ice-core analyses can bridge this knowledge gap.
Here, we present the first NTS ice-core record from Colle Gnifetti (Switzerland), covering the period 1740-2000 CE. Located in the Western European Alps and close to pollution sources, Colle Gnifetti is sensitive to Western European emissions, therefore representing a privileged location from where studying atmospheric organic pollution. 234 different molecules were identified, primarily polar and low-volatile compounds. Our analysis revealed that increased NOx and SO2 emissions from fossil fuel combustion in Western European have altered the molecular composition and oxidation state of OA. Additionally, our approach identified several currently unmonitored organic pollutants, underscoring the need to improve atmospheric monitoring strategies to better assess their trends and to stimulate the adoption of mitigation measures. This study shows the great potential of combining NTS with ice-core analysis for a more comprehensive temporal and chemical understanding of atmospheric organic pollution.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Here, we present the first NTS ice-core record from Colle Gnifetti (Switzerland), covering the period 1740-2000 CE. Located in the Western European Alps and close to pollution sources, Colle Gnifetti is sensitive to Western European emissions, therefore representing a privileged location from where studying atmospheric organic pollution. 234 different molecules were identified, primarily polar and low-volatile compounds. Our analysis revealed that increased NOx and SO2 emissions from fossil fuel combustion in Western European have altered the molecular composition and oxidation state of OA. Additionally, our approach identified several currently unmonitored organic pollutants, underscoring the need to improve atmospheric monitoring strategies to better assess their trends and to stimulate the adoption of mitigation measures. This study shows the great potential of combining NTS with ice-core analysis for a more comprehensive temporal and chemical understanding of atmospheric organic pollution.
From ash to ice: how ice cores can trace extreme events (Keynote) Conference
CH-QUAT Meeting, Bern 2025.
@conference{nokey,
title = {From ash to ice: how ice cores can trace extreme events (Keynote)},
year = {2025},
date = {2025-05-15},
urldate = {2025-05-15},
organization = {CH-QUAT Meeting, Bern},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Non-target screening ice-core analysis reveals changes in the atmospheric organic aerosol composition between the pre-industrial and industrial period (Talk) Conference
European Geoscience Union, Wien 2025.
@conference{nokey,
title = {Non-target screening ice-core analysis reveals changes in the atmospheric organic aerosol composition between the pre-industrial and industrial period (Talk)},
year = {2025},
date = {2025-05-01},
urldate = {2025-05-01},
organization = {European Geoscience Union, Wien},
abstract = {Organic aerosols constitute up to 90% of submicron aerosol mass, playing a crucial role in influencing the Earth’s radiative forcing by absorbing and scattering incoming solar radiation, as well as acting as cloud condensation nuclei. To unravel the complexity of organic aerosol (OA) chemical composition, recent analytical advances, such as high-resolution mass spectrometry and the development of non-target screening (NTS) workflows, have been applied to present-day atmospheric aerosol samples. However, for a better understanding on how human activities have influenced OA chemistry, it is essential to unravel its changes between the pre-industrial and industrial periods.
In this study, we present the first application of a novel NTS method to an ice core from the Belukha glacier (Russian Federation), covering the period from 1800 to 1980 CE. A total of 398 molecules were identified, mainly secondary organic aerosol tracers (SOA), such as mono- and di-carboxylic acids. Since the 1950s, we observed a shift in the atmospheric aerosol composition, characterized by the appearance of organic molecules—such as nitrogen-containing compounds—that result from increased atmospheric reactions with anthropogenic NOx or direct emissions. Additionally, we recorded a significant increase in the oxygen-to-carbon ratio (+3%) and the average carbon oxidation state (+18%) of the detected compounds compared to the pre-industrial period, suggesting an increased oxidative capacity of the atmosphere, associated with enhanced tropospheric ozone concentrations.
This work demonstrates the potential of NTS ice-core studies for extending the reconstruction of OA chemical composition prior to the advent of direct instrumental monitoring, providing valuable contributions to the atmospheric aerosol community.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
In this study, we present the first application of a novel NTS method to an ice core from the Belukha glacier (Russian Federation), covering the period from 1800 to 1980 CE. A total of 398 molecules were identified, mainly secondary organic aerosol tracers (SOA), such as mono- and di-carboxylic acids. Since the 1950s, we observed a shift in the atmospheric aerosol composition, characterized by the appearance of organic molecules—such as nitrogen-containing compounds—that result from increased atmospheric reactions with anthropogenic NOx or direct emissions. Additionally, we recorded a significant increase in the oxygen-to-carbon ratio (+3%) and the average carbon oxidation state (+18%) of the detected compounds compared to the pre-industrial period, suggesting an increased oxidative capacity of the atmosphere, associated with enhanced tropospheric ozone concentrations.
This work demonstrates the potential of NTS ice-core studies for extending the reconstruction of OA chemical composition prior to the advent of direct instrumental monitoring, providing valuable contributions to the atmospheric aerosol community.
2024
Non-target screening analysis on ice and snow samples: a new opportunity to enhance our understanding on past and present atmospheric aerosol composition (Poster) Conference
European Geoscience Union, Wien 2024.
@conference{nokey,
title = {Non-target screening analysis on ice and snow samples: a new opportunity to enhance our understanding on past and present atmospheric aerosol composition (Poster)},
year = {2024},
date = {2024-04-28},
urldate = {2024-04-28},
organization = {European Geoscience Union, Wien},
abstract = {Organic aerosols make up to 70-90% of the total aerosol mass, yet ice-core studies have predominantly focused on a limited set of compounds or bulk fractions altogether. Previous investigations have centered on biomass burning tracers, marine phytoplankton oxidation products, low molecular weight carboxylic acids and persistent organic pollutants, leaving a large majority of molecules unidentified. Advances in high-resolution mass spectrometry (HRMS) have recently enabled the exploration of a wider chemical space through the development of non-target screening (NTS) workflows.
In this work, we present three applications of a novel NTS method. Designed to detect secondary organic aerosol compounds in ice-core and snow samples, the method has contributed to a more comprehensive characterization of past molecular aerosol composition and has supported the development of new molecular proxies. Initially, the method was applied to the Belukha ice core (Siberian Altai, 4072 m. a.s.l.) between 1830 and 1980 CE, providing the first NTS ice-core record that embraces both the pre-industrial and industrial periods. More than 400 compounds were identified, and a clear anthropogenic fingerprint was recognized over the industrial period. Subsequently, the ice core samples from Colle Gnifetti (Switzerland, 4500 m. a.s.l.) covering the period from 1750 to 2000 CE were analyzed. Here, a smaller number of molecules was detected (≈200), consistent with the lower concentrations of dissolved organic carbon observed at this site. In both cores, most of the molecules are composed of carbon (C), hydrogen (H) and oxygen (O) and are associated with atmospheric oxidation of monoterpenes and isoprenes (e.g., succinic acid, pinic acid, azelaic acid). The industrial onset was characterized by an increase in nitrogen and sulfur containing compounds, likely due to the atmospheric reactions with anthropogenic NOx and SO2. The higher occurrence of compounds with higher O/C ratios during the industrial period observed at both locations, suggests an increase in the atmosphere oxidative capacity. Lastly, the method was applied to 56 snow samples collected in springtime close to Ny-Ålesund (Svalbard Archipelago) and covering both pre- and phytoplankton bloom periods. Together with marine observations of algal bloom, the NTS results suggest promising evidence towards new ice-core marine productivity proxies for long-term reconstructions.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
In this work, we present three applications of a novel NTS method. Designed to detect secondary organic aerosol compounds in ice-core and snow samples, the method has contributed to a more comprehensive characterization of past molecular aerosol composition and has supported the development of new molecular proxies. Initially, the method was applied to the Belukha ice core (Siberian Altai, 4072 m. a.s.l.) between 1830 and 1980 CE, providing the first NTS ice-core record that embraces both the pre-industrial and industrial periods. More than 400 compounds were identified, and a clear anthropogenic fingerprint was recognized over the industrial period. Subsequently, the ice core samples from Colle Gnifetti (Switzerland, 4500 m. a.s.l.) covering the period from 1750 to 2000 CE were analyzed. Here, a smaller number of molecules was detected (≈200), consistent with the lower concentrations of dissolved organic carbon observed at this site. In both cores, most of the molecules are composed of carbon (C), hydrogen (H) and oxygen (O) and are associated with atmospheric oxidation of monoterpenes and isoprenes (e.g., succinic acid, pinic acid, azelaic acid). The industrial onset was characterized by an increase in nitrogen and sulfur containing compounds, likely due to the atmospheric reactions with anthropogenic NOx and SO2. The higher occurrence of compounds with higher O/C ratios during the industrial period observed at both locations, suggests an increase in the atmosphere oxidative capacity. Lastly, the method was applied to 56 snow samples collected in springtime close to Ny-Ålesund (Svalbard Archipelago) and covering both pre- and phytoplankton bloom periods. Together with marine observations of algal bloom, the NTS results suggest promising evidence towards new ice-core marine productivity proxies for long-term reconstructions.
2023
Exploring new molecular universes (Talk) Conference
Swiss Polar Day, Fribourg (CH) 2023.
@conference{nokey,
title = {Exploring new molecular universes (Talk)},
year = {2023},
date = {2023-09-01},
organization = {Swiss Polar Day, Fribourg (CH)},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Ice cores: unique environmental archives for non-target screening reconstructions of natural and anthropogenic aerosol compounds (Talk) Conference
18h International Conference on Chemistry and the Environment, Venice 2023.
@conference{nokey,
title = {Ice cores: unique environmental archives for non-target screening reconstructions of natural and anthropogenic aerosol compounds (Talk)},
year = {2023},
date = {2023-04-15},
organization = {18h International Conference on Chemistry and the Environment, Venice},
abstract = {Ice cores are unique environmental archives for reconstructing past climate and environmental conditions. To date, research has focused on inorganic aerosol components, whereas only a few specific organic compounds, like biomass burning tracers, marine phytoplankton oxidation products, low-molecular weight carboxylic acids and persistent organic pollutants have been studied. These compounds represent only a small fraction of the overall organic burden preserved in ice-core samples, meaning that the identity of the large majority of molecules remains unknown. Today, advances in high-resolution mass spectrometry (HRMS) unlock the possibility to explore a wider chemical space through the application of non-target screening (NTS) workflows, with great implications on our understanding of the Earth’s system and on the anthropogenic impact on the environment.
Considering the broad physical and chemical properties of the molecules present in environmental samples, the definition of an appropriate sample preparation strategy and instrumental set-up is key to define the organic molecular classes that will be addressed. Additionally, since organic molecules in ice cores are usually present at sub-ppb levels, a pre-concentration step is often required for their instrumental detection.
We developed a method that includes a solid-phase extraction (SPE) enrichment followed by NTS using Ultra-High Performance Liquid Chromatography HRMS. The method is particularly suitable for the detection of water-soluble molecules and it was successfully applied on 50 meters of the Belukha ice core (Siberian Altai, 4072 m. a.sl.), providing the first NTS study of an ice-core record that embraces both the pre-industrial and industrial periods. The sampling site is mainly influenced by biogenic emissions, especially from herbs and conifers. Nevertheless, a significant increase in sulphate concentration (i.e. a proxy for the combustion of fossil fuels, mainly coal and oil) has been observed since the 1950s, meaning that the ice core tracks past (and present) environmental pollution mainly from Eastern Europe. Following a NTS workflow, we identified more than 4000 profiles. The application of hierarchical cluster analysis on the dataset allowed the identification of two clear temporal clusters (i.e. pre-industrial and industrial periods), as well as six distinct groups of molecules with different trends. Four of them are likely linked to anthropogenic activities (directly or indirectly) with significant increasing trends since the 1950s, consistent with other environmental contamination proxies.
With this work, we show the unique potential that ice cores have in reconstructing the temporal evolution of the molecular composition of both natural and anthropogenic aerosols, paving the way for future interdisciplinary NTS investigations on these environmental media. },
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Considering the broad physical and chemical properties of the molecules present in environmental samples, the definition of an appropriate sample preparation strategy and instrumental set-up is key to define the organic molecular classes that will be addressed. Additionally, since organic molecules in ice cores are usually present at sub-ppb levels, a pre-concentration step is often required for their instrumental detection.
We developed a method that includes a solid-phase extraction (SPE) enrichment followed by NTS using Ultra-High Performance Liquid Chromatography HRMS. The method is particularly suitable for the detection of water-soluble molecules and it was successfully applied on 50 meters of the Belukha ice core (Siberian Altai, 4072 m. a.sl.), providing the first NTS study of an ice-core record that embraces both the pre-industrial and industrial periods. The sampling site is mainly influenced by biogenic emissions, especially from herbs and conifers. Nevertheless, a significant increase in sulphate concentration (i.e. a proxy for the combustion of fossil fuels, mainly coal and oil) has been observed since the 1950s, meaning that the ice core tracks past (and present) environmental pollution mainly from Eastern Europe. Following a NTS workflow, we identified more than 4000 profiles. The application of hierarchical cluster analysis on the dataset allowed the identification of two clear temporal clusters (i.e. pre-industrial and industrial periods), as well as six distinct groups of molecules with different trends. Four of them are likely linked to anthropogenic activities (directly or indirectly) with significant increasing trends since the 1950s, consistent with other environmental contamination proxies.
With this work, we show the unique potential that ice cores have in reconstructing the temporal evolution of the molecular composition of both natural and anthropogenic aerosols, paving the way for future interdisciplinary NTS investigations on these environmental media.
2022
Novel method for the untargeted molecular reconstruction of secondary organic aerosols in ice cores (Poster) Conference
International Partnerships in Ice-Core Research, Crans-Montana 2022.
@conference{nokey,
title = {Novel method for the untargeted molecular reconstruction of secondary organic aerosols in ice cores (Poster)},
year = {2022},
date = {2022-10-15},
organization = {International Partnerships in Ice-Core Research, Crans-Montana},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2021
The International ICE MEMORY initiative (Talk) Conference
COP26, Glasgow 2021.
@conference{nokey,
title = {The International ICE MEMORY initiative (Talk)},
year = {2021},
date = {2021-09-15},
organization = {COP26, Glasgow},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2020
Atmospheric Fe dust might play a negligible role in promoting marine productivity in the Glacial North Pacific (Talk) Conference
0, 8th SISC Conference, Venice 2020.
@conference{nokey,
title = {Atmospheric Fe dust might play a negligible role in promoting marine productivity in the Glacial North Pacific (Talk)},
year = {2020},
date = {2020-09-15},
booktitle = {0},
organization = {8th SISC Conference, Venice},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2019
Fe2+ as a new proxy to detect past volcanic eruptions in ice cores (Talk) Conference
VICS Workshop, Cambridge 2019.
@conference{nokey,
title = {Fe2+ as a new proxy to detect past volcanic eruptions in ice cores (Talk)},
year = {2019},
date = {2019-09-15},
organization = {VICS Workshop, Cambridge},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
New proxy to identify past volcanic eruptions in ice cores (Poster) Conference
European Geoscience Union, Wien 2019.
@conference{nokey,
title = {New proxy to identify past volcanic eruptions in ice cores (Poster)},
year = {2019},
date = {2019-05-01},
organization = {European Geoscience Union, Wien},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
First insights on the processes influencing iron speciation and solubility (Poster) Conference
Workshop CNR, Rome 2019.
@conference{nokey,
title = {First insights on the processes influencing iron speciation and solubility (Poster)},
year = {2019},
date = {2019-05-01},
organization = {Workshop CNR, Rome},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2018
Fe2+ as a new potential proxy to detect past volcanic eruptions (Talk) Conference
6th SISC Conference, Venice 2018.
@conference{nokey,
title = {Fe2+ as a new potential proxy to detect past volcanic eruptions (Talk) },
year = {2018},
date = {2018-05-25},
organization = {6th SISC Conference, Venice},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}


