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2 results for “Aeolotron”
Aeolotron: the Heidelberg air sea interaction facility
<p>In 1999 the Institut für Umweltphysik at the University of Heidelberg moved into a new building. There a world wide unique experimental facility is available, the Heidelberg Aeolotron. This annular wind/wave facility with 10 m in diameter was built for the investigation of small-scale air-sea interaction processes. Although these processes are controlled by thin boundary layers of about a millimeter thickness on both sides of the interface, they are of importance for the global climate and the global cycling of chemical species. These processes partly control how much energy, heat and climate-relevant gaseous species such as carbon dioxide and methane are exchanged between the atmosphere and the oceans. It is very difficult to study air-sea interaction processes at a water surface agitated by waves. The breakthrough came with imaging optical technique that make various parameters of these processes visible and with digital image processes for an automated quantitative analysis of the image sequences obtained. The Aeolotron is well equipped to apply these novel techniques. It is envisioned that it will attract guest scientists from all over the world and will become a center for experimental research in air-sea interaction for years to come.</p> <p> </p>
The SOPRAN Aeolotron November 2014 Seawater Gas Exchange Experiment
<p>The video reports on the first air-sea gas exchange measurements with seawater from the Atlantic Ocean in the Aeolotron, including the effects of the natural surface micro layer and bubbles. In addition, aerosols were sampled with different techniques to investigate to what extent organic material from the sea surface micro layer (SML) is carried into aerosol. The experiments will also be essential for the provide further experimental data for the new SOPRAN air-sea gas transfer model with conditions, where data are not yet available. The project is funded within the SOPRAN project by the BMBF as the German part of the SOLAS initiative.</p> <p>The participating groups were J. Williams, MPI for Chemistry, Mainz (PTR-MS measurements of gas concentrations in air and water), A. Engel, GEOMAR Helmholtz Centre for Ocean Research Kiel (SML measurements), M. van Pinxteren, TROPOS (aerosol measurements), and B. Jähne, U. Heidelberg (MIMS and FTIR gas exchange measurements, active and passive thermography, and all environmental parameters including wave slope imaging). External groups include O. Wurl, ICBM (CO2 gas exchange and SML measurements), B. Schneider, IOW (CO2 measurements), and foreign groups from England (J. Najera, U. Manchester) and France (B. D'Anna, CNRS, lab IRCELYON). The latter two groups supported the aerosol measurements. The experiment took place in November 2014. On September 23, twenty tonnes of Atlantic seawater, sampled from the Northern Atlantic Ocean on board of the research vessel POSEIDON and reloaded to a road tanker at GEOMAR, arrived in Heidelberg and were filled into the storage tanks in the basement of the building, where the Aeolotron is located.</p>
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