Latest News

What are atmospheric rivers and why do they trigger flooding?

Climatic rivers are storms comparable to rivers in the sky that discard huge amounts of rain and can cause flooding, trigger mudslides and lead to death and huge residential or commercial property damage.

Here's an explanation of how they form, their size and potential effects.

WHAT IS AN ATMOSPHERIC RIVER?

The weather condition system takes place all over the world. It starts when a large amount of water vapor from tropical oceans is carried by a jet stream towards land. As the air increases, it cools and condenses, leading to rain or snow. They most frequently form in mid-latitude oceans, approximately 30 and 60 degrees north and south, according to NASA.

They look like a path of wispy clouds that can stretch for numerous miles.

HOW DO ATMOSPHERIC RIVERS CAUSE FLOODING?

The majority of climatic rivers are weak and do not cause damage. In reality, they can supply much-needed rain or snow. Atmospheric rivers can bring up to 15 times the volume of the Mississippi River, according to the National Oceanic and Atmospheric Administration.

In drought-stricken California, such storms have triggered mudslides, fell energy poles and obstructed roadways, however likewise assisted renew depleted tanks and reduced the risk of wildfires by saturating the state's parched vegetation.

In 2019, an atmospheric river nicknamed the Pineapple. Express hit California. The water vapor from near Hawaii. brought rain and triggered mudslides that forced vehicle drivers to. swim for their lives and sent out homes moving downhill.

In 2021, a climatic river discarded a month's worth of rain. on British Columbia in two days, triggering fatal floods and. landslides, ravaging neighborhoods and severing access to. Canada's largest port.

HOW WILL CLIMATE CHANGE EFFECT ATMOSPHERIC RIVERS?

Atmospheric rivers of the kind that drenched California and. flooded British Columbia in the last few years will end up being bigger -. and perhaps more devastating - because of environment change,. according to scientists.

Columns in the environment numerous miles (km) long carry. water vapor over oceans from the tropics to more temperate. regions in amounts more than double the circulation of the Amazon. River, according to the American Meteorological Society. There are projected to be 10% less atmospheric rivers in the. future, but they are expected to be 25% larger and longer and. bring more water, according to a 2018 research paper. This could make managing supply of water much harder as moderate. atmospheric rivers, which can be beneficial for water products,. will be less regular, and strong ones could become more. calamitous.

(source: Reuters)