Department of Forest Ecology and Management Scientific backgroundAtmospheric aerosols are microscopic particles that influence weather and climate, contribute to biogeochemical cycling, and facilitate the dispersal of organisms. Aquatic systems can release aerosols into the atmosphere through processes such as bubble bursting, which have been studied extensively in oceans. However, whether and how these processes operate in streams remains poorly understood.Streams differ from oceans in their hydrodynamics and water chemistry, potentially affecting how particles are captured by bubbles and potentially transferred to the atmosphere. Recent observations suggest that streams contain ice-nucleating particles that could become airborne, raising the possibility that boreal streams represent an overlooked source of atmospheric aerosols. The magnitude of these emissions, the mechanisms driving them, and the environmental factors controlling them remain largely unknownAbout the position The postdoctoral researcher will investigate the hypothesis that streams emit aerosols to the atmosphere and identify the mechanisms and environmental conditions governing these emissions. A central task will be to develop a flux chamber to capture aerosols emitted from stream surfaces and quantify aerosol fluxes using online particle counters and air filtration for laboratory measurements of ice-nucleating particles. The chamber is planned to be deployed in both controlled experiments and field studies in natural boreal streams. The job also includes water sampling and measurements of physicochemical water and bubble properties.The postdoctoral researcher will contribute to experimental design, data collection and analysis, manuscript preparation, scientific publication, an…Postdoktor/PostdocForskarassistenter m.fl.
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