Ny-Ålesund. (Photo: Alfred Wegener Institut) Publication Change of the winter mean (December-January-February) relative humidity from Ny-Ålesund radiosondes. (Photo: Alfred-Wegener-Institut) A manuscript [...] Arctic (AWIPEV Research Base in Ny-Ålesund, Spitsbergen) Radiosonde launch in Ny-Ålesund. (Photo: Alfred Wegener Institut) In Ny-Ålesund, radiosonde measurements are operated since 1991, with regular daily [...] Annual cycle of tropospheric temperatures from radiosondes 1993 to 2014 in Ny-Ålesund. (Photo: Alfred Wegener Institut) Ny-Alesund Radiosondes: Reference Upper-Air Data The inhomogeneity in the historical