Selective cooling on land supports cloud formation by cosmic ray during geomagnetic reversals

Ikuko Kitaba1, Masayuki Hyodo2, Takeshi Nakagawa1, Shigehiro Katoh3, David L Dettman4 and Hiroshi Sato5, (1)Ritsumeikan University, Kusatsu, Japan, (2)Kobe University, Kobe, Japan, (3)Museum of Nature and Human Activities, Hyogo, Sanda, Japan, (4)University of Arizona, Tucson, AZ, United States, (5)University of Hyogo, Sanda, Japan