Publications by Julia Schmale | EPFL Graph Search

Observations of high-time-resolution and size-resolved aerosol chemical composition and microphysics in the central Arctic: implications for climate-relevant particle properties

Benjamin Jérémy Laurent Heutte, Julia Schmale, Ivo Fabio Beck, Andrea Baccarini, Lubna Dada, Hélène Paule Angot, Jakob Boyd Pernov, Nora Bergner, Markus Frey

Aerosols play a critical role in the Arctic's radiative balance, influencing solar radiation and cloud formation. Limited observations in the central Arctic leave gaps in understanding aerosol dynamics year-round, affecting model predictions of climate-rel ...

Copernicus GmbH2025

Characteristics and effects of aerosols during blowing snow events in the central Arctic

Jian Wang, Benjamin Jérémy Laurent Heutte, Julia Schmale, Ivo Fabio Beck, Hélène Paule Angot, Jakob Boyd Pernov, Nora Bergner, Michael Lonardi

Sea salt aerosol (SSaer) significantly impacts aerosol-radiation and aerosol-cloud interactions, and sublimated blowing snow is hypothesized to be an important SSaer source in polar regions. Understanding blowing snow and other wind-sourced aerosols’ clima ...

University of California Press2025

Calving-driven fjord dynamics resolved by seafloor fibre sensing

Julia Schmale

Interactions between melting ice and a warming ocean drive the present-day retreat of tidewater glaciers of Greenland1–3, with consequences for both sea level rise4 and the global climate system5. Controlling glacier frontal ablation, these ice–ocean inter ...

Springer Science and Business Media LLC2025

Data-driven modeling of environmental factors influencing Arctic methanesulfonic acid aerosol concentrations

Julia Schmale, Jakob Boyd Pernov

Natural aerosol components such as particulate methanesulfonic acid (MSA p) play an important role in the Arctic climate. However, numerical models struggle to reproduce MSA p concentrations and seasonality. Here we present an alternative data-driven metho ...

Copernicus GmbH2025

Insights of aerosol-precipitation nexus in the central Arctic through CMIP6 climate models Check for updates

Julia Schmale

The Arctic is experiencing heightened precipitation, affected by aerosols impacting rainfall and snowfall. However, sparse aerosol observations in the central Arctic cryosphere contribute to uncertainties in simulating aerosol-precipitation two-way interac ...

2025

Investigating processes influencing simulation of local Arctic wintertime anthropogenic pollution in Fairbanks, Alaska, during ALPACA-2022

Roman Pohorsky, Julia Schmale, Andrea Baccarini

Lagrangian tracer simulations are deployed to investigate processes influencing vertical and horizontal dispersion of anthropogenic pollution in Fairbanks, Alaska, during the Alaskan Layered Pollution and Chemical Analysis (ALPACA) 2022 field campaign. Sim ...

Copernicus GmbH2025

Ice nucleating particle sources and transports between the Central and Southern Arctic regions during winter cold air outbreaks

Julia Schmale, Ivo Fabio Beck

Ice nucleating particles (INPs) initiate ice formation, affecting the liquid versus ice distribution and radiative properties of clouds. INPs have been measured around the Arctic, but few INP concentration measurements have been reported for air during mov ...

University of California Press2025

Aerosol, trace gas and meteorological data measured at the University of Alaska Fairbanks Farm site in Fairbanks, Alaska during the Alaskan Layered Pollution And Chemical Analysis (ALPACA)-2022 field study

Julia Schmale

These measurements were made as part of the Alaskan Layered Pollution And Chemical Analysis (ALPACA)-2022 field study (https://alpaca.community.uaf.edu/alpaca-field-study/), which investigated air pollution under dark and cold conditions in Fairbanks, Alas ...

Artic Data Center2025

Surface distributions and vertical profiles of trace gases (CO, O3, NO, NO2) in the Arctic wintertime boundary layer using low-cost sensors during ALPACA-2022

Roman Pohorsky, Julia Schmale, Andrea Baccarini

Electrochemical gas sensors (EGSs) have been used to measure the surface distributions and vertical profiles of trace gases in the wintertime Arctic boundary layer during the Alaskan Layered Pollution and Chemical Analysis (ALPACA) field experiment in Fair ...

COPERNICUS GESELLSCHAFT MBH2025

In situ vertical observations of the layered structure of air pollution in a continental high-latitude urban boundary layer during winter

Roman Pohorsky, Julia Schmale, Andrea Baccarini

Vertical in situ measurements of aerosols and trace gases were conducted in Fairbanks, Alaska, during winter 2022 as part of the Alaskan Layered Pollution and Chemical Analysis campaign (ALPACA). Using a tethered balloon, the study explores the dispersion ...

Copernicus GmbH2025

Links between atmospheric aerosols and sea state in the Arctic Ocean

Roman Pohorsky, Julia Schmale, Alireza Moallemi

Sea spray emission is the largest mass flux of aerosols to the atmosphere with important impact on atmospheric radiative transfer. However, large uncertainties still exit in constraining this mass flux and its climate forcing, in particular in the Arctic, ...

Elsevier2024

Quantifying the impact of urban trees on air quality in Geneva, Switzerland

Aurèle Pulfer, Julia Schmale, Charlotte Grossiord, Ilann Ernest Valentin Bourgeois

Atmospheric pollution threatens human health worldwide, with tropospheric ozone (O 3) and particulate matter (PM) among the most harmful pollutants. Urban trees can reduce the concentration of air pollutants through dry deposition on their canopies and sto ...

Elsevier BV2024

Characteristics and sources of fluorescent aerosols in the central Arctic Ocean

Benjamin Jérémy Laurent Heutte, Julia Schmale, Ivo Fabio Beck, Margarida Teles Nogueira Rolo, Hélène Paule Angot, Oliver Müller, Jakob Boyd Pernov, Nora Bergner, Alireza Moallemi, Markus Frey

The Arctic is sensitive to cloud radiative forcing. Due to the limited number of aerosols present throughout much of the year, cloud formation is susceptible to the presence of cloud condensation nuclei and ice nucleating particles (INPs). Primary biologic ...

2024

An Arctic Marine Source of Fluorescent Primary Biological Aerosol Particles During the Transition from Summer to Autumn at the North Pole

Benjamin Jérémy Laurent Heutte, Julia Schmale

Studying primary biological aerosol particles in the Arctic is crucial to understanding their role in cloud formation and climate regulation at high latitudes. During the Arctic Ocean 2018 expedition, fluorescent primary biological aerosol particles (fPBAP ...

Stockholm University Press2024

The annual cycle and sources of relevant aerosol precursor vapors in the central Arctic during the MOSAiC expedition

Benjamin Jérémy Laurent Heutte, Julia Schmale, Ivo Fabio Beck, Lubna Dada, Hélène Paule Angot

In this study, we present and analyze the first continuous time series of relevant aerosol precursor vapors from the central Arctic (north of 80°N) during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. These ...

Copernicus Publications2024

Unveiling the Implicit: Arctic Coastal Aerosol Processes

Benjamin Jérémy Laurent Heutte, Julia Schmale

Arctic coasts cover more than 101,000 km and emulsify terrestrial, marine and socioeconomic ecosystems. All three components produce specific emissions that contribute to the mix of atmospheric constituents, which are processed and dispersed in the coastal ...

Swiss Chemical Society2024

Glucose Enhances Salinity-Driven Sea Spray Aerosol Production in Eastern Arctic Waters

Guangyu Li, Julia Schmale, Athanasios Nenes, André Welti

Sea spray aerosols (SSA) greatly affect the climate system by scattering solar radiation and acting as seeds for cloud droplet formation. The ecosystems in the Arctic Ocean are rapidly changing due to global warming, and the effects these changes have on t ...

2024

Influence of open ocean biogeochemistry on aerosol and clouds: Recent findings and perspectives

Julia Schmale

Aerosols and clouds are key components of the marine atmosphere, impacting the Earth's radiative budget with a net cooling effect over the industrial era that counterbalances greenhouse gas warming, yet with an uncertain amplitude. Here we report recent ad ...

University of California Press2024

Comparison of selected surface level ERA5 variables against in‐situ observations in the continental Arctic

Jules Gros-Daillon, Julia Schmale, Jakob Boyd Pernov

In this study, data from 17 ground-based, continental Arctic observatories areused to evaluate the performance of the European Centre for Medium-RangeWeather Forecasts Reanalysis version 5 (ERA5) reanalysis model. Three aspectsare evaluated: (i) the overal ...

2024

Highly Hygroscopic Aerosols Facilitate Summer and Early‐Autumn Cloud Formation at Extremely Low Concentrations Over the Central Arctic Ocean

Julia Schmale, Andrea Baccarini

Arctic clouds are sensitive to atmospheric particles since these are sometimes in such low concentrations that clouds cannot always form under supersaturated water vapor conditions. This is especially true in the late summer, when aerosol concentrations ar ...

2024