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Showing 1-20 of 61 results
Sea spray aerosols are ubiquitous over much of the Earth's surface and are especially important in remote regions with few other aerosol sources. As such, they may have a pronounced impact on climate through direct and indirect effects on the radiation budget.
Despite their abundance in the Earth’s atmosphere, cloud formation and evolution are still poorly understood. This is particularly true for the interactions clouds have with atmospheric aerosol particles and their precursor vapors, which hampers our knowledge on the role that clouds and precipitation play in the climate system and in governing air quality.
The polar regions are especially sensitive for climate change and the warming the Arctic is more than twice as fast as elsewhere on Earth. The effects of this warming are large, with a dramatic loss of sea ice as an example.
Mercury (Hg) is a global pollutant; its organic form, methylmercury (MeHg), is a neurotoxin that bioaccumulates in marine food webs, impacting human and wildlife health in the Arctic. The interaction between Hg and methane (CH4) cycling in Arctic sediment remains unknown, despite significant CH4 emissions.
The project ARTofMELT (Atmospheric rivers and the onset of sea ice melt 2023) centers on an international interdisciplinary research expedition onboard the Swedish research icebreaker Oden to the central Arctic Ocean in May and June 2023.
We will optimize a simple laboratory test that measures chemical persistence in water-sediment suspensions and apply this test in diverse aquatic environments with the overarching objective of developing guidance for its use in regulation.
The self-purification capacity of rivers is an important ecosystem service (ES). Dominated by microbial biodegradation it eliminates stable and mobile contaminants from the water cycle. The project aims for a first systematic assessment of the ES in 20 rivers for hundreds of micropollutants.
Particles emitted from car brakes contribute an increasingly important part to air pollution in cities, but little is known about the gases which are also emitted. In this project, we investigate the gaseous emissions from brakes and their fate in the atmosphere.
Chemical profiling and toxicological assessment of organic aerosols from traffic - Necessary knowledge for improved risk assessments and regulations.
The international collaboration Circum-Arctic Sediment Carbon Database (CASCADE) curates data from the entire Arctic Ocean on organic carbon, nitrogen, carbon isotopes, and biomarkers. The vision for CASCADE is to be expanded by other components, organic contaminants, more biomarkers, sediment physical properties and sediment cores.
Aerosol-cloud interactions (ACI) remain the largest source of uncertainty in past, present, and future radiative forcing, impeding credible climate projections.
We have several projects to study the effect of combined exposure to radiations and to radiation plus cigarette smoke. The investigations are relevant to radiation protections because environmental and medical exposures often involve mixed components but the biological action of combined exposures is not well characterised.
CRiceS - Climate Relevant interactions and feedbacks: the key role of sea ice and Snow in the polar and global climate system
DESTRESS will synthesise and analyse unique and comprehensive time series of European riverine macroinvertebrate monitoring data to identify temporal trends in ecological and biological trait composition, abundance, and common biodiversity metrics (based on >2,000 sites across 23 European countries; 1968-2020, average 15 years of sampling).
Ultrafine particles (UFPs) are among the most dangerous air pollutants for human health. This project will assess the health impacts of UFPs in the Stockholm region, and make recommendations for reducing their negative effects.
The emissions of certain PFAAs on SSA from the oceans are estimated to be comparable to other major global sources to the air. Despite recent advances in understanding, we suspect that emissions of PFAAs in SSA from coastal waters are underestimated.
We aim to move biotransformation assessment from a non-relevant half-life applied undifferentiated across space and time to an environmentally relevant test result that can be extrapolated using a sound scientific framework.
Feedbacks between a changing climate and vegetation (CLIVE): The role of volatile organic compounds and biogenic aerosols. CLIVE aims to explore how forests, particularly in boreal and tropical regions, influence climate change through their interactions with carbon and water cycles.
FELIX investigates cats' exposure to PFAS substances and links to hormone-related diseases. Cats are beneficial models of human exposure to indoor chemicals. The results are therefore highly relevant for human health as well.
We will conduct fieldwork to determine if air concentrations of PFAS are correlated with tracers of sea spray aerosols and conduct modelling to determine if ocean-to-air transport of PFAS is an important source of PFAS relative to other sources.
