Sentences with phrase «storm numbers»

In the case of American hurricane risk, the science says there's a negative trend in storm number, while storm energy and rainfall probably are rising.

Are there regular cycles to tropical storm numbers, and how does this affect your answer?

This year, forecasters with the National Oceanic and Atmospheric Administration are expecting to see above - average storm numbers in the Atlantic, despite the uncertainty of whether an El Niño will develop over the summer.

However, two major climate factors could tweak the expected storm numbers, NOAA forecasters said Friday.

Or as a recent summary of the state of scientific understanding put it, an «increase in intense storm numbers is projected despite a likely decrease (or little change) in the global numbers of all tropical storms.»

Variations in tropical cyclones, hurricanes and typhoons are dominated by ENSO and decadal variability, which result in a redistribution of tropical storm numbers and their tracks, so that increases in one basin are often compensated by decreases over other oceans.

So given the signals that forecasters have to work with, they expect a 45 percent chance of above - average storm numbers, a 35 percent chance of near - normal, and only a 20 percent chance of below - normal activity.

The study looked at historical hurricane activity across the entire tropical Atlantic basin to see if the current peak in storm numbers is... Read more

Holland said that the tropical storm anomalies in the 1940s and 1950s can be explained by natural variability, but that the increasingly higher CO2 levels in the atmosphere began to change the regular patterns of hurricane development in the Caribbean in the 1970s, and that by the early 1990s, the changes in the atmospheric began affecting the storm numbers and intensities.

Variations in the total numbers of tropical cyclones result from ENSO and decadal variability, which also lead to a redistribution of tropical storm numbers and tracks.

The study looked at historical hurricane activity across the entire tropical Atlantic basin to see if the current peak in storm numbers is anomalous.

In other words, there is little evidence from current dynamical models that 21st century climate warming will lead to large (~ 300 %) increases in tropical storm numbers, hurricane numbers, or PDI in the Atlantic.

Existing records of past Atlantic tropical storm numbers (1878 to present) in fact do show a pronounced upward trend, correlated with rising SSTs (see Figs. 1 and 9 of Vecchi and Knutson 2008).

But at least we were supposed to be getting off the hook when it came to storm numbers.