Sentences with phrase «frequency over the twentieth century»

There has been no detectable trend in hurricane frequency over the twentieth century when you account for increased observational capabilities through time (Landsea, 2007).

Not exact matches

· In the mid - and high - latitudes of the Northern Hemisphere over the latter half of the twentieth century, it is likely that there has been a 2 to 4 percent increase in the frequency of heavy precipitation events [thunderstorms and large - scale storm activity].