We thank first the people who helped us to gather the high-resolution radiosonde data and who provided support: Stefan Liess (SPARC data), Guillaume Brissebrat (AMMA data), and David Hooper and his team (BADC, Met Office); and Marc Allaart, Jitze van der Meulen, Henk Klein Baltink, and Ge Verver (De Bilt data, KNMI). This work is supported by a grant from the Dutch Ministry of Transport, Public Works and Water Management. SPARC high-resolution radiosondes data in this paper were provided by the Canadian Stratospheric Processes and their Role in Climate Network (C-SPARC), funded by the Canadian Foundation for Climate and Atmospheric Sciences and the Canadian Space Agency. BADC high-resolution radiosonde data are provided courtesy of the Met Office (United Kingdom) through the British Atmospheric Data Centre. Based on a French initiative, AMMA was built by an international scientific group and was funded by a large number of agencies, especially from France, the United Kingdom, the United States, and Africa. It has been the beneficiary of a major financial contribution from the European Community’s Sixth Framework Programme. Detailed information on scientific coordination and funding is available on the AMMA International website (http://www.amma-international.org).
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