*Gunter Stober¹、Vivien Matthias²、Sven Wilhelm¹、Dimitry Pokhotelov¹、Alexander Kozlovsky³、Evgenia Belova⁴、Johan Kero⁴、Chris Hall⁵、Masaki Tsutsumi⁶ (1.Leibniz Institute of Atmospheric Physics、2.Potsdam Institute for Climate Impact Research, Earth System Analysis - Research Domain 1, Potsdam, Germany、3.Sodankylä Geophysical Observatory, Sodankylä, FIN-99600, Finland、4.Swedish Institute of Space Physics, Box 812, 98128 Kiruna, Sweden、5.Tromsø Geophysical Observatory UiT-the Arctic University of Norway, Tromsø, Norway、6.National Institute of Polar Research, Tokyo, Japan)