Intensity measures a hurricane’s force, which includes wind speeds, and there has been some recorded increase. The biggest change, however, has been in the duration of hurricanes: how many days each hurricane lasts.
强度衡量包括风速在内的飓风的力量，强度增加有记录可查。最大的改变则是飓风的持续时间，也就是每场飓风持续的天数。