Dust storms in the Gulf of Alaska might play a pivotal role in influencing global climate patterns, a study has revealed.
These Alaskan dust particles, especially from the Copper River Valley, have been found to be more efficient at forming ice in the atmosphere compared with those from the Sahara, shedding new light on the complexities of our climate system.
Giant dust storms originating in the Gulf of Alaska can persist for days, releasing tonnes of silt into the atmosphere.
Their scale is such that they have been spotted from space, with images from the Landsat satellite in 2020 capturing dust being carried from the valley to Alaska’s southern coastline.
While the exact implications of these dust particles on global climate are a mystery, research by the University of Leeds and the National Centre for Atmospheric Science suggests a more profound effect than previously believed.
Historically, climate research predominantly concentrated on dust contributions from the Sahara and regions in Africa and Asia.
Prof Benjamin Murray, lead researcher, told The National: "Dust from places like the Sahara has long been known to be important for the planet’s climate. It reflects sunlight back into space so affects climate directly."
These mid to low-latitude storms introduce desert-sourced dust particles into the atmosphere.
However, researchers at Leeds chose a different path, examining the dust from the Copper River Valley on Alaska's south coast, which stretches more than 443km.
Prof Murray said: "One major difference is that Copper River Valley dust has some biological material mixed up in it which makes it much better at nucleating ice.
"The more ice-nucleating particles, the more ice in clouds ... and consequently stratoform clouds out over the oceans tend to reflect less sunlight to space with more absorbed at the surface."
This river is believed to transport about 70 million tonnes of glacial sediment annually.
During warmer months, when water levels are low, winds pick up this silt, dispersing it extensively across North America, sometimes reaching altitudes conducive for ice-cloud formation.
Distinct from Saharan dust, the Copper River Valley particles have a richer biological composition due to the area's abundant vegetation and wildlife.
Dust's role in atmospheric ice formation is pivotal. Without dust, cloud water can remain liquid even in freezing temperatures.
Prof Benjamin Murray, an atmospheric scientist at Leeds, said: “Only a tiny fraction of atmospheric dust particles have the ability to initiate ice formation.
“We are only beginning to understand their origins and global spread. A cloud's ability to reflect sunlight is determined by its ice content, thus it's imperative to understand the diverse sources of these ice-nucleating agents globally.”
Existing climate models largely ignore these high-latitude dust sources, a deficiency highlighted by Prof Murray.
Sarah Barr and Bethany Wyld, doctoral researchers at Leeds, collected samples during these dust storms.
Subsequent laboratory analysis revealed that the particles from Alaska excel in forming ice, compared with their Saharan counterparts.
This difference arises from the Alaskan dust's microscopic biogenic substance fragments, remnants of living organisms.
Meanwhile, Saharan dust comprises mostly potassium feldspar, a significant ice nucleating agent in such regions.
Emphasising the study's significance, Ms Barr said: “While the Sahara's importance in supplying ice-nucleating particles is acknowledged, our research underscores river deltas like the Copper River Valley's equally vital role. Comprehensive understanding of these dust emissions is essential for refining our climate models.”
Killing of Qassem Suleimani
UAE currency: the story behind the money in your pockets
Dubai Bling season three
Cast: Loujain Adada, Zeina Khoury, Farhana Bodi, Ebraheem Al Samadi, Mona Kattan, and couples Safa & Fahad Siddiqui and DJ Bliss & Danya Mohammed
Rating: 1/5
More on animal trafficking
MATCH INFO:
Second Test
Pakistan v Australia, Tuesday-Saturday, 10am daily at Zayed Cricket Stadium, Abu Dhabi
Entrance is free
FIXTURES
All times UAE ( 4 GMT)
Friday
Saint-Etienne v Montpellier (10.45pm)
Saturday
Monaco v Caen (7pm)
Amiens v Bordeaux (10pm)
Angers v Toulouse (10pm)
Metz v Dijon (10pm)
Nantes v Guingamp (10pm)
Rennes v Lille (10pm)
Sunday
Nice v Strasbourg (5pm)
Troyes v Lyon (7pm)
Marseille v Paris Saint-Germain (11pm)
How to apply for a drone permit
- Individuals must register on UAE Drone app or website using their UAE Pass
- Add all their personal details, including name, nationality, passport number, Emiratis ID, email and phone number
- Upload the training certificate from a centre accredited by the GCAA
- Submit their request
What are the regulations?
- Fly it within visual line of sight
- Never over populated areas
- Ensure maximum flying height of 400 feet (122 metres) above ground level is not crossed
- Users must avoid flying over restricted areas listed on the UAE Drone app
- Only fly the drone during the day, and never at night
- Should have a live feed of the drone flight
- Drones must weigh 5 kg or less
Sweet%20Tooth
%3Cp%3E%3Cstrong%3ECreator%3A%20%3C%2Fstrong%3EJim%20Mickle%3Cbr%3E%3Cstrong%3EStarring%3A%20%3C%2Fstrong%3EChristian%20Convery%2C%20Nonso%20Anozie%2C%20Adeel%20Akhtar%2C%20Stefania%20LaVie%20Owen%3Cbr%3E%3Cstrong%3ERating%3A%20%3C%2Fstrong%3E2.5%2F5%3C%2Fp%3E%0A
INDIA SQUAD
Rohit Sharma (captain), Shikhar Dhawan (vice-captain), KL Rahul, Suresh Raina, Manish Pandey, Dinesh Karthik (wicketkeeper), Deepak Hooda, Washington Sundar, Yuzvendra Chahal, Axar Patel, Vijay Shankar, Shardul Thakur, Jaydev Unadkat, Mohammad Siraj and Rishabh Pant (wicketkeeper)
FIXTURES
UAE’s remaining fixtures in World Cup qualification R2
Oct 8: Malaysia (h)
Oct 13: Indonesia (a)
Nov 12: Thailand (h)
Nov 17: Vietnam (h)
Superpower%20
%3Cp%3E%3Cstrong%3EDirector%3A%20%3C%2Fstrong%3ESean%20Penn%2C%20Aaron%20Kaufman%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ERating%3A%20%3C%2Fstrong%3E3%2F5%3C%2Fp%3E%0A
Duterte Harry: Fire and Fury in the Philippines
Jonathan Miller, Scribe Publications
Australia World Cup squad
Aaron Finch (capt), Usman Khawaja, David Warner, Steve Smith, Shaun Marsh, Glenn Maxwell, Marcus Stoinis, Alex Carey, Pat Cummins, Mitchell Starc, Jhye Richardson, Nathan Coulter-Nile, Jason Behrendorff, Nathan Lyon, Adam Zampa
Company profile
Name: Steppi
Founders: Joe Franklin and Milos Savic
Launched: February 2020
Size: 10,000 users by the end of July and a goal of 200,000 users by the end of the year
Employees: Five
Based: Jumeirah Lakes Towers, Dubai
Financing stage: Two seed rounds – the first sourced from angel investors and the founders' personal savings
Second round raised Dh720,000 from silent investors in June this year
NINE WINLESS GAMES
Arsenal 2-2 Crystal Palace (Oct 27, PL)
Liverpool 5-5 Arsenal (Oct 30, EFL)
Arsenal 1-1 Wolves (Nov 02, PL)
Vitoria Guimaraes 1-1 Arsenal (Nov 6, Europa)
Leicester 2-0 Arsenal (Nov 9, PL)
Arsenal 2-2 Southampton (Nov 23, PL)
Arsenal 1-2 Eintracht Frankfurt (Nov 28, Europa)
Norwich 2-2 Arsenal (Dec 01, PL)
Arsenal 1-2 Brighton (Dec 05, PL)
Funk Wav Bounces Vol.1
Calvin Harris
Columbia
UAE currency: the story behind the money in your pockets
Benefits of first-time home buyers' scheme
- Priority access to new homes from participating developers
- Discounts on sales price of off-plan units
- Flexible payment plans from developers
- Mortgages with better interest rates, faster approval times and reduced fees
- DLD registration fee can be paid through banks or credit cards at zero interest rates
How much do leading UAE’s UK curriculum schools charge for Year 6?
- Nord Anglia International School (Dubai) – Dh85,032
- Kings School Al Barsha (Dubai) – Dh71,905
- Brighton College Abu Dhabi - Dh68,560
- Jumeirah English Speaking School (Dubai) – Dh59,728
- Gems Wellington International School – Dubai Branch – Dh58,488
- The British School Al Khubairat (Abu Dhabi) - Dh54,170
- Dubai English Speaking School – Dh51,269
*Annual tuition fees covering the 2024/2025 academic year
Six large-scale objects on show
- Concrete wall and windows from the now demolished Robin Hood Gardens housing estate in Poplar
- The 17th Century Agra Colonnade, from the bathhouse of the fort of Agra in India
- A stagecloth for The Ballet Russes that is 10m high – the largest Picasso in the world
- Frank Lloyd Wright’s 1930s Kaufmann Office
- A full-scale Frankfurt Kitchen designed by Margarete Schütte-Lihotzky, which transformed kitchen design in the 20th century
- Torrijos Palace dome
ON%20TRACK
%3Cp%3EThe%20Dubai%20Metaverse%20Assembly%20will%20host%20three%20main%20tracks%3A%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EEducate%3A%3C%2Fstrong%3E%20Consists%20of%20more%20than%2010%20in-depth%20sessions%20on%20the%20metaverse%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EInspire%3A%3C%2Fstrong%3E%20Will%20showcase%20use%20cases%20of%20the%20metaverse%20in%20tourism%2C%20logistics%2C%20retail%2C%20education%20and%20health%20care%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EContribute%3A%3C%2Fstrong%3E%20Workshops%20for%20metaverse%20foresight%20and%20use-case%20reviews%3C%2Fp%3E%0A
Kandahar%20
%3Cp%3E%3Cstrong%3EDirector%3A%3C%2Fstrong%3E%20Ric%20Roman%20Waugh%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EStars%3A%C2%A0%3C%2Fstrong%3EGerard%20Butler%2C%20Navid%20Negahban%2C%20Ali%20Fazal%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%202.5%2F5%3C%2Fp%3E%0A
Silent Hill f
Publisher: Konami
Platforms: PlayStation 5, Xbox Series X/S, PC
Rating: 4.5/5
THE SPECS
Engine: 6.75-litre twin-turbocharged V12 petrol engine
Power: 420kW
Torque: 780Nm
Transmission: 8-speed automatic
Price: From Dh1,350,000
On sale: Available for preorder now
