Long-term variation in the ionosphere and lower thermosphere as seen in the geomagnetic solar quiet daily variation

Atsuki Shinbori1, Yukinobu Koyama2, Tomoaki Hori3, Masahito Nosé2 and Yuichi Otsuka4, (1)Nagoya University, Institute for Space-Earth Environmental Research, Nagoya, Japan, (2)Kyoto University, Graduate School of Science, Kyoto, Japan, (3)Nagoya University, Solar-Terrestrial Environment Laboratory, Nagoya, Japan, (4)Nagoya University, ISEE, Nagoya, Japan