Much of this work was supported by the European Research Council Grant 227915 (PBL-PMES: Atmospheric Planetary Boundary Layers: Physics, Modelling and Role in Earth Systems). The Helsinki Testbed was funded by grants from the Finnish Technology and Innovation Agency (Tekes). The research leading to these results has also received funding from the European Union’s Seventh Framework Programme FP/2007–2011 under Grant Agreement 212520 (MEGAPOLI—Megacities: Emissions, Urban, Regional and Global Atmospheric Pollution and Climate Effects, and Integrated Tools for Assessment and Mitigation). Author D. M. Schultz was partially funded by Vaisala Oyj.
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