Interactions between aerosol particles and tropical convective clouds are a major source of uncertainty in the scientific understanding of climate change. AC3S will use new observational data and numerical models to address this challenge.

The Swedish island of Gotland faces limited capacity in groundwater reservoirs and increased demand during tourist season. Desalination from the Baltic Sea is a promising method for water supply which will benefit from a forecast of harmful algae blooms.

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.

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.

Aerosol-cloud interactions (ACI) remain the largest source of uncertainty in past, present, and future radiative forcing, impeding credible climate projections.

CRiceS - Climate Relevant interactions and feedbacks: the key role of sea ice and Snow in the polar and global climate system

The Gulf Stream’s continuation into the Nordic Seas is central in the Earth’s climate system. Therefore, we need the ability to continuously monitor the total strength of the warm, north-flowing surface water and the cold south-flowing deep water.

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.

Can polar clouds dampen global warming? The current consensus states that clouds enhance surface warming in polar regions but that their impact on the net energy budget at the top of the atmosphere, and thus global climate, is either small or cooling.

FORCeS - Constrained aerosol forcing for improved climate projections

The project is part of the EU funded Marie Skłodowska-Curie Innovative Training Network (ITN) named iMIRACLI (innovative MachIne leaRning to constrain Aerosol-cloud CLimate Impacts) and examines how aerosols affect the Arctic mixed-phase clouds.

Will the ice continue to disappear at an ever-increasing rate as the exposed ocean surface absorbs increasing amounts of solar radiation? Or might conditions become progressively more favorable for biological activity and associated cloud-formation, decreasing the amount of solar-radiation received at the surface?

MOCCHA (Microbiology-Ocean-Cloud-Coupling – in the High Arctic) – ARCTIC OCEAN 2018 was an international and interdisciplinary research expedition to the central Arctic Ocean during the summer of 2018.

By studying the oceanic and atmospheric overturning circulation it is possible to for example track the heat, salt and moisture exchanges between the low and high latitudes.

The ORIGIN rocket project addresses the Earth's nightglow, a global emission layer that is the result of reactions between atomic oxygen and other atmospheric species in the upper mesosphere and lower thermosphere, at altitudes between 80 and 110 km.

Stockholm University's new graduate school in marine, climate and environmental issues is directed towards students from diverse disciplines, interested in understanding their own research in a broad and interdisciplinary context.

The Ryder 2019 expedition with the Swedish icebreaker Oden targets the unexplored marine realm of Ryder Glacier, more specifically the Sherard Osborne Fjord and adjacent area of northern Nares Strait and the southern Lincoln Sea.

Clouds in the tropics and midlatitudes contribute roughly equally to the global cloud feedback. However, there is still no accepted explanation for why midlatitude cloud feedback is positive or what mechanisms determine its magnitude.

MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) is a Swedish satellite mission designed to investigate atmospheric waves. Large uncertainties in the distribution of such waves is a limiting factor for atmospheric models in predicting future changes in the mesosphere, the region bordering space at 50-100 km above sea level.

Previously proposed tipping-points that would lead to the tropical rain forest systems’ collapse involve positive feedback processes. Yet, the Amazon rain forest has persisted despite higher temperatures and carbon dioxide levels in the past.

The increase in summer sea-ice melt will likely amplify Arctic warming. But could the same conditions also spur the activity of marine microbiota, increase cloudiness, and counteract the melting?