1Climate Features and the Variations of Low-temperature Days in GuangzhouLI Xiao-juan, LI Yin-yin, WEN Jing, JI Zhong-ping1-32Analysis on a Non-typical Torrential Rain Event Associated with Cold Air in AutumnLUO Cong, GAO Ting-ting, LI Huai-yu4-73Reviews on the Strong Cold air Events in November of Guangzhou and a Typical Case StudyWU Xiu-lan, GAO Ting-ting, WU Nai-gen, WEN Jing, HUANG Zhong, WANG Gang8-12