News
Atmospheric rivers are shifting poleward, reshaping global weather patterns
Zhe Li, University Corporation for Atmospheric Research
Atmospheric rivers – those long, narrow bands of water vapor in the sky that bring heavy rain and storms to the U.S. West Coast and many other regions – are shifting toward higher latitudes, and that’s changing weather patterns around the world.
The shift is worsening droughts in some regions, intensifying flooding in others, and putting water resources that many communities rely on at risk. When atmospheric rivers reach far northward into the Arctic, they can also melt sea ice, affecting the global climate.
In a new study published in Science Advances, University of California, Santa Barbara, climate scientist Qinghua Ding and I show that atmospheric rivers have shifted about 6 to 10 degrees toward the two poles over the past four decades.
Atmospheric rivers on the move
Atmospheric rivers aren’t just a U.S West Coast thing. They form in many parts of the world and provide over half of the mean annual runoff in these regions, including the U.S. Southeast coasts and West Coast, Southeast Asia, New Zealand, northern Spain, Portugal, the United Kingdom and south-central Chile.
California relies on atmospheric rivers for up to 50% of its yearly rainfall. A series of winter atmospheric rivers there can bring enough rain and snow to end a drought, as parts of the region saw in 2023.
While atmospheric rivers share a similar origin – moisture supply from the tropics – atmospheric instability of the jet stream allows them to curve poleward in different ways. No two atmospheric rivers are exactly alike.
What particularly interests climate scientists, including us, is the collective behavior of atmospheric rivers. Atmospheric rivers are commonly seen in the extratropics, a region between the latitudes of 30 and 50 degrees in both hemispheres that includes most of the continental U.S., southern Australia and Chile.
Our study shows that atmospheric rivers have been shifting poleward over the past four decades. In both hemispheres, activity has increased along 50 degrees north and 50 degrees south, while it has decreased along 30 degrees north and 30 degrees south since 1979. In North America, that means more atmospheric rivers drenching British Columbia and Alaska.
A global chain reaction
One main reason for this shift is changes in sea surface temperatures in the eastern tropical Pacific. Since 2000, waters in the eastern tropical Pacific have had a cooling tendency, which affects atmospheric circulation worldwide. This cooling, often associated with La Niña conditions, pushes atmospheric rivers toward the poles.
The poleward movement of atmospheric rivers can be explained as a chain of interconnected processes.
During La Niña conditions, when sea surface temperatures cool in the eastern tropical Pacific, the Walker circulation – giant loops of air that affect precipitation as they rise and fall over different parts of the tropics – strengthens over the western Pacific. This stronger circulation causes the tropical rainfall belt to expand. The expanded tropical rainfall, combined with changes in atmospheric eddy patterns, results in high-pressure anomalies and wind patterns that steer atmospheric rivers farther poleward.
Conversely, during El Niño conditions, with warmer sea surface temperatures, the mechanism operates in the opposite direction, shifting atmospheric rivers so they don’t travel as far from the equator.
The shifts raise important questions about how climate models predict future changes in atmospheric rivers. Current models might underestimate natural variability, such as changes in the tropical Pacific, which can significantly affect atmospheric rivers. Understanding this connection can help forecasters make better predictions about future rainfall patterns and water availability.
Why does this poleward shift matter?
A shift in atmospheric rivers can have big effects on local climates.
In the subtropics, where atmospheric rivers are becoming less common, the result could be longer droughts and less water. Many areas, such as California and southern Brazil, depend on atmospheric rivers for rainfall to fill reservoirs and support farming. Without this moisture, these areas could face more water shortages, putting stress on communities, farms and ecosystems.
In higher latitudes, atmospheric rivers moving poleward could lead to more extreme rainfall, flooding and landslides in places such as the U.S. Pacific Northwest, Europe, and even in polar regions.
In the Arctic, more atmospheric rivers could speed up sea ice melting, adding to global warming and affecting animals that rely on the ice. An earlier study I was involved in found that the trend in summertime atmospheric river activity may contribute 36% of the increasing trend in summer moisture over the entire Arctic since 1979.
What it means for the future
So far, the shifts we have seen still mainly reflect changes due to natural processes, but human-induced global warming also plays a role. Global warming is expected to increase the overall frequency and intensity of atmospheric rivers because a warmer atmosphere can hold more moisture.
How that might change as the planet continues to warm is less clear. Predicting future changes remains uncertain due largely to the difficulty in predicting the natural swings between El Niño and La Niña, which play an important role in atmospheric river shifts.
As the world gets warmer, atmospheric rivers – and the critical rains they bring – will keep changing course. We need to understand and adapt to these changes so communities can keep thriving in a changing climate.
Zhe Li, Postdoctoral Researcher in Earth System Science, University Corporation for Atmospheric Research
This article is republished from The Conversation under a Creative Commons license. Read the original article.
The science section of our news blog STM Daily News provides readers with captivating and up-to-date information on the latest scientific discoveries, breakthroughs, and innovations across various fields. We offer engaging and accessible content, ensuring that readers with different levels of scientific knowledge can stay informed. Whether it’s exploring advancements in medicine, astronomy, technology, or environmental sciences, our science section strives to shed light on the intriguing world of scientific exploration and its profound impact on our daily lives. From thought-provoking articles to informative interviews with experts in the field, STM Daily News Science offers a harmonious blend of factual reporting, analysis, and exploration, making it a go-to source for science enthusiasts and curious minds alike. https://stmdailynews.com/category/science/
Discover more from Daily News
Subscribe to get the latest posts sent to your email.
Exciting news is on the horizon for commuters in the Santa Barbara and Goleta area! After years of planning and anticipation, the Metrolink commuter train service is set to launch this fall, providing a new, efficient way to travel between Ventura County and Santa Barbara County. With the increasing focus on alternative transportation options, this project represents a significant step forward for our communities and environment.
The Journey Begins
The Santa Barbara County Association of Governments (SBCAG) is at the forefront of this initiative, fulfilling a promise made to voters who approved a funding tax aimed at both widening the freeway and exploring innovative transportation alternatives. Originally considered along with Amtrak, the decision to partner with Metrolink emerged, as their schedules proved more conducive to the commuter needs of the area.
Metrolink’s plan is to operate a streamlined route starting from Moorpark, with stops in our beautiful Santa Barbara and Goleta, avoiding the timing conflicts that hampered the Amtrak discussions. Aaron Bonfilio, SBCAG’s Director of Multimodal Programs, emphasized the importance of this collaboration, saying, “working with them to develop this agreement is critical to the next step. And that’s what this is all about.”
A Convenient Ride
Imagine leaving Oxnard at a crisp 7 a.m. and arriving in Santa Barbara by 7:51 a.m., or reaching Goleta shortly after at 8:03 a.m. The convenience of this service is striking, with additional afternoon departures that will surely benefit daily commuters. Goleta Mayor Paula Perotte expressed her enthusiasm, stating, “Oh, that’s totally reasonable,” highlighting the strategic scheduling designed to meet local needs.
Riders can look forward to a brand new train depot in Goleta, currently under construction, with daily bus connections to enhance accessibility. Bonfilio mentioned the multiple options available through the Coastal Express, providing around 20 trips in both directions each morning and afternoon.
An Affordable and Productive Commute
The introductory round-trip fare of just $10, or $5 in each direction, is a refreshing incentive intended to encourage residents to leave their cars behind. It’s not only planet-friendly but wallet-friendly, too! For those opting to work during their commute, Mayor Perotte noted that riding the train may even allow workers to log their commute time since they can be productive on their laptops while on board.
Initial projections show around 200 daily riders, and with a capacity for over 500, there’s plenty of room for growth. “I think once people get used to riding the train, they’re going to love it,” said Mayor Perotte, sharing her vision of creating a new commuting habit that moves people away from sitting in traffic.
Ready to Roll
SBCAG is currently finalizing agreements to ensure everything is in place before the fall launch, paving the way for an exciting new chapter in commuting for Santa Barbara and Goleta residents. This initiative not only represents a practical solution to transportation challenges but also offers a glimpse into a future where public transit continues to evolve.
In closing, let’s prepare to say goodbye to traffic woes and hello to the ease and joy of train travel. Get ready to hop on the Metrolink and enjoy the ride into a more connected and sustainable future! 🚆✨
STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.
Discover more from Daily News
Subscribe to get the latest posts sent to your email.
In a significant health alert, the U.S. Food and Drug Administration (FDA) has upgraded the recall of Costco’s Kirkland Signature Smoked Salmon to a Class I designation, indicating a serious health risk. This recall follows the discovery of Listeria monocytogenes during routine laboratory testing.
Originally announced in late October, the recall involved 111 cases of smoked salmon packaged in twin 12-ounce units, with a UPC number of 0 96619 25697 6 and a lot number of 8512801270. The affected products have a best-by date of November 13, 2024, and were distributed between October 9 and October 13, 2024, specifically to Costco locations in Florida.
Listeria monocytogenes is known to cause listeriosis, a severe infection that can result in serious health complications or even death, especially among vulnerable populations such as pregnant individuals, the elderly, and those with weakened immune systems. Although no illnesses have been reported in connection with this product, consumers are advised to check their freezers for these recalled items.
Costco is urging customers who purchased this product to return it for a full refund.
For your safety, the FDA reminds consumers that Listeria can be found in a variety of foods, particularly raw or smoked seafood, unpasteurized dairy products, and deli meats. If you suspect you may have consumed contaminated food, please consult with a healthcare professional.
Stay safe and informed by regularly checking for updates on food recalls from reliable sources.
Related links:
The FDA Issued a Class I Recall on Costco’s Kirkland Signature Smoked Salmon https://www.foodandwine.com/costco-kirkland-signature-smoked-salmon-class-i-recall-listeria-monocytogenes-8780336
https://www.fda.gov/food/foodborne-pathogens/listeria-listeriosis
STM Daily News is a vibrant news blog dedicated to sharing the brighter side of human experiences. Emphasizing positive, uplifting stories, the site focuses on delivering inspiring, informative, and well-researched content. With a commitment to accurate, fair, and responsible journalism, STM Daily News aims to foster a community of readers passionate about positive change and engaged in meaningful conversations. Join the movement and explore stories that celebrate the positive impacts shaping our world.
Groundbreaking for a Sustainable Future: LA Metro’s Southeast Gateway Line Light Rail Project
Discover more from Daily News
Subscribe to get the latest posts sent to your email.
Lifestyle
Newsweek Names Delta Dental of California One of America’s Greatest Workplaces for Diversity 2025
Annual ranking recognizes companies fostering inclusion and championing diversity based on anonymous employee feedback, public data, and third-party research.
SAN FRANCISCO /PRNewswire/ — Delta Dental of California and Affiliates, the leading dental insurance provider, has been recognized by Newsweek as one of America’s Greatest Workplaces for Diversity in 2025. This distinguished award is presented by Newsweek and Plant-A Insights Group to recognize U.S. companies across industries that prioritize fostering diversity and inclusive workplace cultures.
“Our people are our greatest asset,” said Brian Sherman, executive vice president and chief people officer of Delta Dental of California and Affiliates. “This recognition reflects our deep commitment to Diversity, Equity, and Inclusion programs that support and celebrate the unique perspectives and contributions of our employees.”
America’s Greatest Workplaces for Diversity is an annual ranking determined by a rigorous evaluation of public data, HR insights, and anonymous employee surveys. The list honors organizations with over 1,000 employees that demonstrate a meaningful commitment to offering distinctive company cultures inclusive of backgrounds and demographics, including age group, race, cultures, and sexual orientations. Research suggests about 80 percent of U.S. workers believe it’s important for companies to create inclusive cultures.
“As companies in the United States continue to navigate the evolving dynamics of the workplace, diversity remains a cornerstone of organizational success and social responsibility,” said Nancy Cooper, global editor in chief of Newsweek. “Newsweek and market-data research firm Plant-A Insights are proud to introduce ‘America’s Greatest Workplaces for Diversity 2025,’ highlighting companies committed to building inclusive workplaces.”
Delta Dental of California received a rating of 4.5 out of 5 stars for its Diversity, Equity and Inclusion practices in 2024. The company has also been recognized with other Newsweek accolades, including America’s Greatest Workplaces 2023, America’s Greatest Workplaces for Diversity 2023, and Americas Greatest Workplaces for Parents and Families 2023.
Delta Dental is committed to providing consistent, quality access to oral health care, improving education and driving lasting policy changes to address systemic issues. To learn more about what makes Delta Dental of California and Affiliates one of the best employers in the U.S., visit our career page.
About Delta Dental of California and Affiliates
Since 1955, Delta Dental of California and Affiliates has offered comprehensive, high-quality oral health care coverage to millions of enrollees and built the strongest network of dental providers in the country. The Delta Dental of California enterprise includes its affiliates Delta Dental Insurance Company, Delta Dental of Pennsylvania, Delta Dental of New York, Inc., as well as the national DeltaCare USA network, and provides dental benefits to more than 31 million people across 15 states and the District of Columbia.* All are members of the Delta Dental Plans Association based in Chicago, Illinois, the not-for-profit national association that through a national network of Delta Dental companies collectively covers millions of people nationwide. Delta Dental is a registered trademark of Delta Dental Plans Association.
For more information about Delta Dental of California and Affiliates, please visit www.deltadentalins.com
*Delta Dental of California and Affiliates’ operating areas encompass Alabama, California, Delaware, Florida, Georgia, Louisiana, Maryland, Mississippi, Montana, Nevada, New York, Pennsylvania, Texas, Utah, West Virginia and the District of Columbia, as well as Puerto Rico and the Virgin Islands.
SOURCE Delta Dental of California
Discover more from Daily News
Subscribe to get the latest posts sent to your email.
-
Urbanism1 year agoSignal Hill, California: A Historic Enclave Surrounded by Long Beach
-
News2 years agoDiana Gregory Talks to us about Diana Gregory’s Outreach Services
-
Senior Pickleball Report2 years agoThe Absolute Most Comfortable Pickleball Shoe I’ve Ever Worn!
-
STM Blog2 years agoWorld Naked Gardening Day: Celebrating Body Acceptance and Nature
-
Senior Pickleball Report2 years agoACE PICKLEBALL CLUB TO DEBUT THEIR HIGHLY ANTICIPATED INDOOR PICKLEBALL FRANCHISES IN THE US, IN EARLY 2023
-
Travel2 years agoUnique Experiences at the CitizenM
-
Automotive2 years ago2023 Nissan Sentra pricing starts at $19,950
-
Senior Pickleball Report2 years ago“THE PEOPLE’S CHOICE AWARDS OF PICKLEBALL” – VOTING OPEN