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Canada flood shows how climate change could fuel atmospheric river storms

Published

3 years ago

November 19, 2021

Atmospheric rivers of the kind that drenched California and flooded British Columbia in recent weeks will become larger — and possibly more destructive — because of climate change, scientists said.

Columns in the atmosphere hundreds of miles long carry water vapor over oceans from the tropics to more temperate regions in amounts more than double the flow of the Amazon River, according to the American Meteorological Society.

These “rivers in the sky” are relatively common, with about 11 present on Earth at any time, according to NASA.

But warming air and seas around the globe causes conditions that scientists said will make them hold more moisture, causing extreme precipitation when they make landfall, often on the west coasts of North America, South America and Western Europe.

Because of climate change, atmospheric rivers are projected to become slightly less frequent, but more intense, according to a 2018 study https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2017GL076968 led by researchers from NASA’s Jet Propulsion Laboratory.

“There may be fewer, but they are going to be lasting longer, and more intense,” Vicky Espinoza, an author of the NASA study who is now a graduate student at the University of California Merced, said.

Atmospheric rivers will become about 10% less frequent by the end of this century, but about 25% longer and wider, the study found. That will lead to nearly double the frequency of the most intense atmospheric river storms.

Weak atmospheric river systems provide rain and snow that are needed for freshwater supplies. Stronger storms, however, can lead to flooding and extreme winds that disrupt travel, cause mudslides and damage property.

One such event in Canada this month dumped a month’s worth of rain in two days, prompting fatal floods and landslides in British Columbia, devastating communities and severing access to the country’s largest port https://www.reuters.com/business/canadian-shippers-find-few-easy-alternatives-grain-oil-cut-off-by-flood-2021-11-17.

They are not always catastrophic. One such storm last month in drought-stricken California triggered mudslides, toppled utility poles and blocked roadways, but also helped replenish depleted reservoirs and reduced the risk of wildfires by saturating the state’s parched vegetation.

“Because everything was so dry in California, there were a lot of benefits to that storm,” said Julie Kalansky, deputy director for operations at the Center for Western Weather and Water Extremes at the Scripps Institution of Oceanography.

The atmospheric river that hit California last month was accompanied by a so-called “bomb cyclone,” a weather hazard that holds more precipitation and produces stronger winds.

“It’s like the river supercharges the cyclone’s engine,” said Carl Schreck, a researcher with North Carolina State University’s Cooperative Institute for Satellite Earth System Studies.

But as the events in Canada have shown, when heavy precipitation falls on fire-ravaged areas the results can be devastating.

Wildfires, like the ones that hit British Columbia this summer, destroy tree canopies that catch rain and roots that suck up moisture and cling to soil. The fires leave a thick layer of water-repellent ash along forest floors.

“Not only are we having more of these so-called atmospheric rivers, but we also have the added secondary effect of heat and drought… which then amplify the effects of heavy rainstorms,” said Matthias Jakob, a geoscientist with Canada’s BCG Engineering.

(Reporting by Nichola Groom in Los Angeles; Additional reporting by Timothy Gardner in Washington and Anna Mehler Paperny in Toronto; Writing by Nichola Groom; Editing by Lisa Shumaker)

News

Allen nets shutout as Devils burn Oilers 3-0

Published

8 hours ago

November 4, 2024

Anne Joseph

EDMONTON – Jake Allen made 31 saves for his second shutout of the season and 26th of his career as the New Jersey Devils closed out their Western Canadian road trip with a 3-0 victory over the Edmonton Oilers on Monday.

Jesper Bratt had a goal and an assist and Stefan Noesen and Timo Meier also scored for the Devils (8-5-2) who have won three of their last four on the heels on a four-game losing skid.

The Oilers (6-6-1) had their modest two-game winning streak snapped.

Calvin Pickard made 13 stops between the pipes for Edmonton.

TAKEAWAYS

Devils: In addition to his goal, Bratt picked up his 12th assist of the young season to give him nine points in his last eight games and now 15 points overall. Nico Hischier remains in the team lead, picking up an assist of his own to give him 16 points for the campaign. He has a point in all but four games this season.

Oilers: Forward Leon Draisaitl was held pointless after recording six points in his previous two games and nine points in his previous four. Draisaitl usually has strong showings against the Devils, coming into the contest with an eight-game point streak against New Jersey and 11 goals in 17 games.

KEY MOMENT

New Jersey took a 2-0 lead on the power play with 3:26 remaining in the second period as Hischier made a nice feed into the slot to Bratt, who wired his third of the season past Pickard.

KEY RETURN?

Oilers star forward and captain Connor McDavid took part in the optional morning skate for the Oilers, leading to hopes that he may be back sooner rather than later. McDavid has been expected to be out for two to three weeks with an ankle injury suffered during the first shift of last Monday’s loss in Columbus.

OILERS DEAL FOR D-MAN

The Oilers have acquired defenceman Ronnie Attard from the Philadelphia Flyers in exchange for defenceman Ben Gleason.

The 6-foot-3 Attard has spent the past three season in the Flyers organization seeing action in 29 career games. The 25-year-old right-shot defender and Western Michigan University grad was originally selected by Philadelphia in the third round of the 2019 NHL Entry Draft. Attard will report to the Oilers’ AHL affiliate in Bakersfield.

UP NEXT

Devils: Host the Montreal Canadiens on Thursday.

Oilers: Host the Vegas Golden Knights on Wednesday.

This report by The Canadian Press was first published Nov. 4, 2024.

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Mahomes throws 3 TD passes, unbeaten Chiefs beat Buccaneers 30-24 in OT

Published

8 hours ago

November 4, 2024

Anne Joseph

KANSAS CITY, Mo. (AP) — Patrick Mahomes threw for 291 yards and three touchdowns, and Kareem Hunt pounded into the end zone from two yards out in overtime to give the unbeaten Kansas City Chiefs a 30-24 win over the Tampa Bay Buccaneers on Monday night.

DeAndre Hopkins had two touchdown receptions for the Chiefs (8-0), who drove through the rain for two fourth-quarter scores to take a 24-17 lead with 4:17 left. But then Kansas City watched as Baker Mayfield led the Bucs the other way in the final minute, hitting Ryan Miller in the end zone with 27 seconds to go in regulation time.

Tampa Bay (4-5) elected to kick the extra point and force overtime, rather than go for a two-point conversion and the win. And it cost the Buccaneers when Mayfield called tails and the coin flip was heads. Mahomes and the Chiefs took the ball, he was 5-for-5 passing on their drive in overtime, and Hunt finished his 106-yard rushing day with the deciding TD plunge.

Travis Kelce had 14 catches for 100 yards with girlfriend Taylor Swift watching from a suite, and Hopkins finished with eight catches for 86 yards as the Chiefs ran their winning streak to 14 dating to last season. They became the sixth Super Bowl champion to start 8-0 the following season.

Mayfield finished with 200 yards and two TDs passing for the Bucs, who have lost four of their last five.

It was a memorable first half for two players who had been waiting to play in Arrowhead Stadium.

The Bucs’ Rachaad White grew up about 10 minutes away in a tough part of Kansas City, but his family could never afford a ticket for him to see a game. He wound up on a circuitous path through Division II Nebraska-Kearney and a California junior college to Arizona State, where he eventually became of a third-round pick of Tampa Bay in the 2022 draft.

Two year later, White finally got into Arrowhead — and the end zone. He punctuated his seven-yard scoring run in the second quarter, which gave the Bucs a 7-3 lead, by nearly tossing the football into the second deck.

Then it was Hopkins’ turn in his first home game since arriving in Kansas City from a trade with the Titans.

The three-time All-Pro, who already had caught four passes, reeled in a third-down heave from Mahomes amid triple coverage for a 35-yard gain inside the Tampa Bay five-yard line. Three plays later, Mahomes found him in the back of the end zone, and Hopkins celebrated his first TD with the Chiefs with a dance from “Remember the Titans.”

Tampa Bay tried to seize control with consecutive scoring drives to start the second half. The first ended with a TD pass to Cade Otton, the latest tight end to shred the Chiefs, and Chase McLaughlin’s 47-yard field goal gave the Bucs a 17-10 lead.

The Chiefs answered in the fourth quarter. Mahomes marched them through the rain 70 yards for a tying touchdown pass, which he delivered to Samaje Perine while landing awkwardly and tweaking his left ankle, and then threw a laser to Hopkins on third-and-goal from the Buccaneers’ five-yard line to give Kansas City the lead.

Tampa Bay promptly went three-and-out, but its defence got the ball right back, and this time Mayfield calmly led his team down field. His capped the drive with a touchdown throw to Miller — his first career TD catch — with 27 seconds to go, and Tampa Bay elected to play for overtime.

UP NEXT

Buccaneers: Host the San Francisco 49ers on Sunday.

Chiefs: Host the Denver Broncos on Sunday.

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AP NFL:

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NHL roundup: Kuemper helps visiting Kings shut out Predators 3-0

Published

8 hours ago

November 4, 2024

Anne Joseph

NASHVILLE, Tenn. (AP) — Darcy Kuemper made 16 saves for his first shutout of the season and 32nd overall, helping the Los Angeles Kings beat the Nashville Predators 3-0 on Monday night.

Adrian Kempe had a goal and an assist and Anze Kopitar and Kevin Fiala also scored. The Kings have won two of their last three.

Juuse Saros made 24 saves for the Predators. They are 1-2-1 in their last four.

Kopitar opened the scoring with 6:36 remaining in the opening period. Saros denied the Kings captain’s first shot, but Kopitar collected the rebound below the goal line and banked it off the netminder’s skate.

Fiala, a former Predator, made it 2-0 35 seconds into the third.

The Kings held Nashville to just three third-period shots on goal, the first coming with 3:55 remaining and Saros pulled for an extra attacker.

Elsewhere in the NHL on Monday:

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DEVILS 3 OILERS 0

EDMONTON, Alta. (AP) — Jake Allen made 31 saves for his second shutout of the season and 26th of his NHL career, helping the New Jersey Devils close their western Canadian road trip with a 3-0 victory over the Edmonton Oilers.

Jesper Bratt had a goal and an assist and Stefan Noesen and Timo Meier also scored. The Devils improved to 8-5-2. They have won three of their last four after a four-game skid.

Calvin Pickard made 13 saves for Edmonton. The Oilers had won two straight.

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