Thin mid-level clouds in the foreground with deep convective clouds in the background. Photo: Radovan Krejci

Thin tropical clouds cool the climate

Thin clouds at about 5 km altitude are more ubiquitous in the tropics than previously thought and they have a substantial cooling effect on climate. This is shown in a recent study by researchers from ACES and colleagues from Stockholm University and the University of Miami, which was published in Nature Communications. Mid-level clouds are currently missing in global climate models.  …

A little calcium with your sea spray?

Seawater droplets that are formed when waves break at the ocean surface, often referred to as sea spray aerosol, could potentially be important for climate. Quite how important their effects are depends a lot on what the sea spray aerosol droplets are made of. This was the focus of a recent study by researchers at ACES published in Geophysical Research …

New method for better assessment of endocrine-disrupting chemicals

Researchers at ACES participated in an international collaboration to develop a new method for the identification of endocrine-disrupting chemicals (EDC). The method was presented in an article published in the scientific journal Environmental Health. Among the high amount of chemicals used in the global market today are substances that can interfere with the body’s endocrine system, ultimately affecting human health …

Weathering of rocks by mosses may explain climate change during the Late Ordovician

During the Ordovician Period (485.4 and 443.8 million years ago), carbon dioxide (CO2) levels in the atmosphere were about eight times higher than today. Despite that, the Earth’s climate was cooled to cause an ice age, something that scientists have had difficulty explaining. A new study by researchers at ACES and colleagues in France, Germany and the UK, published in …

To the left: water flea (Daphnia magna) with visible plastic microbeads (green spots) in the gut. To the right: water flea that has ingested irregular plastic fragments, which, in contrast to microbeads, have formed clumps in the gut (red circle).

Impact of microplastics on marine animals more complex than previously thought

Effects of microplastics on aquatic organisms can vary depending on particle type and food availability shows a new study by researchers from ACES and colleagues from AquaBiota Research, Stockholm, published in journal PLOS One. Their results present a more complex picture of the effects of microplastics than previously thought. “Microplastics are tiny particles that are less than 5mm in size …

Airplanes make clouds brighter

Clouds may have a net warming or cooling effect on climate, depending on their thickness and altitude. Artificially formed clouds called contrails form due to aircraft effluent. In a cloudless sky, contrails are thought to have minimal effect on climate. But what happens when the sky is already cloudy? In a new study published in the journal Nature Communications, scientists …

World class research in environmental science at Stockholm University according to Shanghai Ranking

Today we learned that environmental science and engineering at Stockholm University was ranked 5th in the world by Shanghai Ranking global ranking of academic subjects. This outstanding placing, despite the limitations of this and other university ranking systems, is a clear indication of the world-class research in environmental science being done at Stockholm University. Our international standing in this field is …

Many unknown chemicals in the Baltic Sea

Nowadays, we use and produce more chemicals and in increasingly higher amounts. Many chemicals are later found in the marine environment, such as the Baltic Sea. But what and how much do we know about the chemicals present in the Baltic Sea? Researchers at ACES set out to answer this question in a new study published in the journal Environmental …

New research sheds light into our climate’s cloudier past

In two new papers published in Nature, researchers from ACES along with colleagues from Europe and the USA, imply that the baseline pristine pre-industrial climate may have been cloudier than presently thought. New results from the CLOUD experiment at CERN, Switzerland, shows that organic vapours emitted by trees produce abundant aerosol particles in the atmosphere in the absence of sulphuric acid. …

Researcher receives prestigious award to study emerging pollutants in the Baltic Sea

Researcher Claudia Lindim has been awarded a stipend of 85000 SEK (€9000) by The King Carl XVI 50-year Foundation for Science, Technology and Environment.   “ I am very happy to receive this award which will allow me contribute to improving the environment in the Baltic region,” says Claudia Lindim.   Claudia Lindim, who is originally from Portugal, is a …

Stockholm ranked best student city in the Nordic countries

Stockholm is the Nordic region’s best student city, and the 24th in the world according to a new ranking from QS World University Rankings. The QS Best Student Cities 2016 compares which cities are the best in the world for international students. Stockholm placed highest in the Nordic countries, and is well placed internationally with its place at 24 in …

Environmental toxins accumulate in wild animals in China

Many animal species in southern China carry high levels of organohalogen contaminants. Most common is DDT, which has been banned for a long time in many parts of the world. New types of PCBs as well as polychlorinated carbon compounds and chloroparaffins were also found.  These are the results of a research study from a collaborative project between researchers from …

Contact information

Visiting addresses:

Geovetenskapens Hus,
Svante Arrhenius väg 8, Stockholm

Arrheniuslaboratoriet, Svante Arrhenius väg 16, Stockholm (Unit for Analytical and Toxicological Chemistry)

Mailing address:
Department of Environmental Science and Analytical Chemistry (ACES)
Stockholm University
106 91 Stockholm

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Annika Hallman
Science Communicator
Phone +46 (0)8 16 15 53
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