Season's 1st tropical storm forms in eastern Pacific

  • Season's 1st tropical storm forms in eastern Pacific

Season's 1st tropical storm forms in eastern Pacific

The trend has all the signs of human-caused climate change, Kossin said.

Global warming is causing severe storms to move across the planet slower than ever before - and that's bad news for everyone.

NOAA's National Centers for Environmental Information (NCEI) scientist Dr. Jim Kossin, author of the study, found a 20 percent slowdown in a storm's forward velocity 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.

'The laws of thermodynamics reveal that, as the atmosphere warms by 1°C, the amount of moisture it can hold increases by 7 per cent.

"Every one of the hazards that we know tropical cyclones carry with them, all of them are just going to stick around longer", Kossin said.

"The storms will stay in your neighbourhoods longer", he said.

"I was not surprised by his findings", she says.

Kossin would actually agree on that point.

"Inland flooding, freshwater flooding, is taking over as the key mortality risk now associated with these storms", Kossin said.

Kossi hopes that scientists will begin building models that show which communities are likely to face the most risk. "These are not good things to be combining", he says.

On average, the storms moved 2 kilometers per hour slower in 2016 compared with 1949-a change of 10% during a period when Earth warmed by 0.5⁰C.

Tropical cyclones have generally slowed more in the Northern Hemisphere where they are also known as hurricanes and typhoons and where more of these storms typically occur each year. The VIIRS image showed a better, more organized circulation center with consolidating banding of thunderstorms wrapping into a well-defined low level circulation center.

Dr Kossin said more rain was also falling during cyclones, and there was evidence that tropical cyclones were migrating more towards the poles.

But both scientists say the importance is in the bigger picture.