Observational Study on the Characteristics of the Boundary Layer during Changes in the Intensity of Tropical Cyclones Landing in Guangdong, China

Figure 6

Distributions of the absolute angular momentum relative to the radius of the typhoon as obtained by wind profilers. (a)–(k) are consistent with the numbers in Table 1, and the black dotted solid lines are the strength grades of a tropical cyclone. The numbers on the right represent the tropical cyclone category as judged by its intensity [20]: 1 is tropical depression, 2 is tropical storm, 3 is severe tropical storm, 4 is typhoon, 5 is intense typhoon, and 6 is superintense typhoon.

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