Application of Buoy Observations in Determining Characteristics of Several Typhoons Passing the East China Sea in August 2012

Table 1

CMA’s Classification of tropical cyclones for Western North Pacific.

Grade of tropical; cyclones	Maximum sustained (2-minute average) wind speeds (m/s)	Maximum surface wind in beaufort wind scale
Tropical depression	10.8~17.1	6~7
Tropical storm	17.2~24.4	8~9
Severe tropical storm	24.5~32.6	10~11
Typhoon	32.7~41.4	12~13
Severe typhoon	41.5~50.9	14~15
Super typhoon	≧51.0	≧16