Hurricanes and Typhoons are Becoming 'Sluggish' — and That Makes Them More Destructivehttps://www.businessinsider.com/hurricanes-moving-more-slowly-causing-more-damage-2018-6- Over the past 70 years, the speed of hurricanes and tropical storms has slowed about 10% on average, according to new research.
- That doesn't mean storm systems have become less intense, just that they're crossing Earth more slowly, which actually gives storms more time to dump rain and lash an area with powerful winds.
- Over land, especially in the North Atlantic and Western North Pacific, storms are moving 20-30% more slowly.
James P. Kossin,
A global slowdown of tropical-cyclone translation speed,
Nature Volume 558, pages104–107 (2018)
Open Access: Timothy M. Hall & James P. Kossin,
Hurricane stalling along the North American coast and implications for rainfall,
Climate and Atmospheric Science Volume 2, Article Number: 17 (2019)
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A Global Slowdown of Tropical-Cyclone Translation Speed and Implications for Floodinghttps://riskfrontiers.com/rf2018/wp-content/uploads/2018/07/Briefing-Note-370.pdf
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Hurricanes: A Bit Stronger, a Bit Slower, and a Lot Wetter in a Warmer Climatehttps://phys.org/news/2018-05-hurricanes-bit-stronger-slower-lot.htmlScientists have published a detailed analysis of how 22 recent hurricanes would change if they instead formed near the end of this century. While each storm's transformation would be unique, on balance, the hurricanes would become a little stronger, a little slower moving, and a lot wetter.
In one example, Hurricane Ike—which killed more than 100 people and devastated parts of the U.S. Gulf Coast in 2008—could have 13 percent stronger winds, move 17 percent slower, and be 34 percent wetter if it formed in a future, warmer climate.
The study, led by the National Center for Atmospheric Research (NCAR) and published in the
Journal of Climate, compares high-resolution computer simulations of more than 20 historical, named Atlantic storms with a second set of simulations that are identical except for a warmer, wetter climate that is consistent with the average outcome of scientific projections for the end of this century.
... As a group, the storms in the future simulation had 6 percent stronger average hourly maximum wind speeds than those in the past. They also moved at a 9 percent slower speed and had a 24 percent higher average hourly maximum rainfall rate. Average storm radius did not change.
... there was one consistent feature across storms: They all produced more rain.
Open Access: Ethan D. Gutmann et al.
Changes in Hurricanes from a 13-Yr Convection-Permitting Pseudo–Global Warming Simulation,
Journal of Climate (2018)
