Fig. 6

Comparison of I–D thresholds. Green lines thresholds for Taiwan. Blue lines thresholds for Japan. Black lines global thresholds. Gray lines thresholds for humid (sub)tropics or Asian monsoon regions. Dashed line other regional thresholds. 1-1 Chien-Yuan et al. (2005); 1–2 and 1–3 Jan and Chen (2005); 2–1 and 3–2 Jibson (1989); 2–2 Hong et al. (2005); 2–3 Saito et al. (2010a); 3–1 Caine (1980); 3–3, 3–4, and 3–5 Guzzetti et al. (2008); 4–1 and 4–2 Guzzetti et al. (2008), Cfa climate of humid subtropical east coast in Köppen’s system; 4–3 Larsen and Simon (1993), Puerto Rico; 4–4 Dahal and Hasegawa (2008), Nepal Himalaya; 5 Cannon et al. (2008), Southern California