Hurricanes Are Lingering Longer. That Makes Them More Dangerous

Hurricanes Are Lingering Longer. That Makes Them More Dangerous

Slowdowns over land were higher in some regions (a 20 percent slowdown over land for Atlantic storms, a 30 percent slowdown over land for western North Pacific storms and a 19 percent slowdown over land for storms affecting the Australian region).

Several major natural climate variations occur over long periods, such as the Pacific Decadal Oscillation, which is similar to the El Niño/La Niña oscillation that can significantly alter global weather but operates on much longer time scales (hence "decadal", whereas El Niño/La Niña alternate from year to year).

If Harvey is any indication of what hurricanes will look like in the future, this will create a considerable strain on countries' ability to respond financially to storms. But he says there's good evidence that the warming planet could weaken the global winds that push storms around.

"If the atmosphere can hold more water vapor, then things are going to tend to rain more", Kossin said. Still, the shift is precisely what he and other cyclone experts said would be expected from climate change. "The storms will stay in your neighborhoods longer".

Kossin acknowledged problems with pre-1970s data but said that most of it deals with how strong storms are. "But I was surprised by the magnitude of the slowdown".

Kossin would actually agree on that point.

The center said the storm was likely to strengthen some more as it moved farther out into the Pacific, but predicted Aletta would begin weakening Saturday. That may mean bad news for people residing in their path.

The study was published Wednesday in the peer-reviewed British journal Nature. Rainfall, on average, increased 24 percent. "That has serious implications for inland flooding and urban infrastructure". And there are limits to each approach.

Severe storms will develop across the Plains into the Midwest today.

But both scientists say the importance is in the bigger picture. "And, unfortunately, this signal would point to more freshwater flooding".

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