What is turbulence and why is it getting worse?


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About 11 hours after take-off in London, a Singapore Airlines flight hit severe turbulence on Tuesday, forcing the crew to make an emergency landing in Bangkok. One passenger died and dozens were injured during the incident.

Last year, a Delta Air Lines flight from Milan was about 64km away from its destination in Atlanta when it hit severe turbulence. Although the Airbus 350 plane landed safely, 11 people were taken to hospital.

A few days earlier, passengers on a flight over Mallorca in Spain were videoed screaming amid strong winds and storms.

These incidents follow others this year during which severe turbulence has caused injuries.

It also comes after the release of a report that found bumpier flights are more common than ever before, with clear-air turbulence intensifying significantly worldwide in the past four decades.

“We’ve only been tracking turbulence since the 1970s,” Vance Hilderman, chief executive of aviation and safety-critical services company Afuzion, tells The National.

“We know that temperatures generally declined in the century prior to that as part of normal global fluctuations. However, in the past 50 years, some temperatures have increased and assessed turbulence has correspondingly increased as expected.”

What is turbulence?

Severe turbulence can be caused by extreme weather events, such as thunderstorms. Getty Images
Severe turbulence can be caused by extreme weather events, such as thunderstorms. Getty Images

“Turbulence is a common occurrence during flights and can vary from light to severe intensity,” explains Captain Michael Schreiber, chief of pilot technical operations at Emirates Airline.

It refers to the irregular and often abrupt changes in the airflow that an aircraft experiences while flying through the atmosphere, he adds. “If happening, it normally results in sudden, erratic movements or vibrations of the aircraft.”

There are various reasons why this might happen, he says. There’s clear-air turbulence, which occurs at high altitudes in otherwise clear skies and is often associated with the jet stream – fast-flowing air currents that move from west to east in the upper atmosphere.

Then there’s convective turbulence, which comes from vertical air movement due to heating from the Earth’s surface, often associated with clouds and thunderstorms.

Mechanical turbulence happens when air encounters obstacles such as mountains or buildings; while wake turbulence is generated by aircraft vortices – circular patterns of rotating air left behind a wing as it generates lift – or jetwash, which are gases expelled from the engine.

Which areas of the world are most turbulent?

“Remember, turbulence is caused by temperature differences and changes. The higher the altitude, the thinner and colder the air, and thus less turbulence. A cooling evening in an Arizona summer has maximum turbulence,” Mr Hilderman says.

Mr Schreiber also says certain parts of the world and times of year are more prone to turbulent skies due to meteorological factors.

“During the hot summer, for example, you may notice that during departure, approach and landing, the air you travel through is generally rougher than during the cooler winter season. This is caused by the air masses heated up by the hot surfaces and rising vertically.”

What do pilots do to mitigate its effects?

Pilots are trained around turbulence avoidance and management. Getty Images
Pilots are trained around turbulence avoidance and management. Getty Images

“Like ocean waves, ship captains can mitigate ocean wave effects via manoeuvring, but cannot avoid waves,” says Mr Hilderman. “Aircraft can try to fly around turbulence, but turbulence is dynamically moving and changing and not readily detected.”

Mr Schreiber, however, says Emirates is investing heavily in new technologies to make these predictions more accurate. The airline’s pilots also receive training on how to deal with it.

“Practical training around turbulence avoidance and management is conducted in the flight simulator,” he says. “Pilots are instructed how to navigate around areas of turbulence and how to ensure the safety of our passengers and crew in cases where turbulence is encountered in-flight.

“Improved technology, such as better weather prediction tools, support the pilots in making good decisions, avoiding areas of rough air while in-flight.”

When possible, Emirates flights will be routed around areas of forecasted turbulence and avoid various weather phenomena to try to ensure smooth flying.

But, Mr Hilderman says, no matter what, “aircraft will always fly in turbulence”.

How does turbulence affect aircraft?

“The larger the aircraft, the less effect from turbulence – just like small versus large boats upon ocean waves,” says Mr Hilderman. “Turbulence literally moves an aircraft within the air away from its intended stable path and also affects flight control surfaces, such as the wings, aileron, lift and rudder.”

Mr Schreiber says the most significant ways turbulence affects a flight are when it comes to passenger comfort and safety, crew workload, flight delays and reroutes, and aircraft stability.

“It is important to note that turbulence in general is not a safety threat to modern aircraft,” he says.

Mr Hilderman echoes this. “Aircraft are designed to be safer than any expected turbulence, with a wide margin for worst-case turbulence.”

How does it affect passengers?

Experts advise passengers keep their seat belts on at all times in case of unexpected turbulence. iStockphoto
Experts advise passengers keep their seat belts on at all times in case of unexpected turbulence. iStockphoto

While the safety of modern, commercial aircraft is not in question, there is a threat to passengers on-board. “Unbelted passengers could die in extreme turbulence,” Mr Hilderman says.

Mr Schreiber says passengers must keep their seat belts fastened, not just during instability, but at all times, as not all turbulence can be predicted. “Passengers who are not wearing their seat belts and are not properly secured are potentially at risk of injury,” he says.

The other way travellers may be affected is via flight path changes. “In severe cases, flights need to be delayed or rerouted to avoid forecasted areas of turbulence,” says Mr Schreiber.

How can passengers deal with bumpy flights?

Both Mr Hilderman and Mr Schreiber warn that some turbulence is unpredictable and that passengers should wear a seat belt.

“Never leave your seat if you feel turbulence and return to your seat if it begins,” says Mr Hilderman. “Store loose belongings and sharp objects. In extreme turbulence, push your head back against the headrest firmly to avoid neck whiplash.”

He also advises parents to hold infants firmly and place them in a belted carrier or, if possible, buy them a seat instead of holding them on their lap.

You also might want to avoid hot beverages, Mr Schreiber adds, as they can splash or spill, resulting in potential burns.

Most importantly, he says, stay calm. “Remember, turbulence might disturb your in-flight experience, but it is not harmful to modern aircraft.”

Is turbulence anything to be scared of?

No, says Mr Schreiber. Rather, it’s something passengers should be prepared for and informed about, he adds. “Almost every flight encounters turbulence at one stage during a flight”,

Mr Hilderman says: “Even trained pilots and passengers with three million flight miles and 20,000 hours in the air occasionally have white knuckles and use the sick bag.”

But aircraft are continually improving their designs, he adds. “So today’s aircraft in greater turbulence are still safer than prior aircraft in less turbulence.”

UAE v Gibraltar

What: International friendly

When: 7pm kick off

Where: Rugby Park, Dubai Sports City

Admission: Free

Online: The match will be broadcast live on Dubai Exiles’ Facebook page

UAE squad: Lucas Waddington (Dubai Exiles), Gio Fourie (Exiles), Craig Nutt (Abu Dhabi Harlequins), Phil Brady (Harlequins), Daniel Perry (Dubai Hurricanes), Esekaia Dranibota (Harlequins), Matt Mills (Exiles), Jaen Botes (Exiles), Kristian Stinson (Exiles), Murray Reason (Abu Dhabi Saracens), Dave Knight (Hurricanes), Ross Samson (Jebel Ali Dragons), DuRandt Gerber (Exiles), Saki Naisau (Dragons), Andrew Powell (Hurricanes), Emosi Vacanau (Harlequins), Niko Volavola (Dragons), Matt Richards (Dragons), Luke Stevenson (Harlequins), Josh Ives (Dubai Sports City Eagles), Sean Stevens (Saracens), Thinus Steyn (Exiles)

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THE SPECS

Engine: AMG-enhanced 3.0L inline-6 turbo with EQ Boost and electric auxiliary compressor

Transmission: nine-speed automatic

Power: 429hp

Torque: 520Nm​​​​​​​

Price: Dh360,200 (starting)

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
Volvo ES90 Specs

Engine: Electric single motor (96kW), twin motor (106kW) and twin motor performance (106kW)

Power: 333hp, 449hp, 680hp

Torque: 480Nm, 670Nm, 870Nm

On sale: Later in 2025 or early 2026, depending on region

Price: Exact regional pricing TBA

Key facilities
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  • Premier League-standard football pitch
  • 400m Olympic running track
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How the bonus system works

The two riders are among several riders in the UAE to receive the top payment of £10,000 under the Thank You Fund of £16 million (Dh80m), which was announced in conjunction with Deliveroo's £8 billion (Dh40bn) stock market listing earlier this year.

The £10,000 (Dh50,000) payment is made to those riders who have completed the highest number of orders in each market.

There are also riders who will receive payments of £1,000 (Dh5,000) and £500 (Dh2,500).

All riders who have worked with Deliveroo for at least one year and completed 2,000 orders will receive £200 (Dh1,000), the company said when it announced the scheme.

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Director: Joseph Kosinski

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4pm Al Bastakiya Listed US$300,000 (Dirt) 1,900m

4.35pm Mahab Al Shimaal Group 3 $350,000 (D) 1,200m

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7.30pm Dubai City Of Gold Group 2 $350,000 (T) 2,410m

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Name: Abeer Al Bah

Born: 1972

Husband: Emirati lawyer Salem Bin Sahoo, since 1992

Children: Soud, born 1993, lawyer; Obaid, born 1994, deceased; four other boys and one girl, three months old

Education: BA in Elementary Education, worked for five years in a Dubai school

 

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AT4 Ultimate, as tested

Engine: 6.2-litre V8

Power: 420hp

Torque: 623Nm

Transmission: 10-speed automatic

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Engine: twin-turbocharged 3.5-liter V6

Power: 450hp

Torque: 700Nm

Price: From Dh450,000, Autograph model from Dh510,000

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Miguel Cotto world titles:

WBO Light Welterweight champion - 2004-06
WBA Welterweight champion – 2006-08
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For decades the UAE has granted two and three year visas to foreign workers, tied to their current employer. Now that's changing.

Last year, the UAE cabinet also approved providing 10-year visas to foreigners with investments in the UAE of at least Dh10 million, if non-real estate assets account for at least 60 per cent of the total. Investors can bring their spouses and children into the country.

It also approved five-year residency to owners of UAE real estate worth at least 5 million dirhams.

The government also said that leading academics, medical doctors, scientists, engineers and star students would be eligible for similar long-term visas, without the need for financial investments in the country.

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The Bio

Hometown: Bogota, Colombia
Favourite place to relax in UAE: the desert around Al Mleiha in Sharjah or the eastern mangroves in Abu Dhabi
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Based: Dubai
Founders: Alhaan Ahmed, Alyina Ahmed and Maximo Tettamanzi
Sector: Sustainability
Total funding: Self funded
Number of employees: 4
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Chancellor Rachel Reeves set markets on edge as she appeared visibly distraught in parliament on Wednesday. 

Legislative setbacks for the government have blown a new hole in the budgetary calculations at a time when the deficit is stubbornly large and the economy is struggling to grow. 

She appeared with Keir Starmer on Thursday and the pair embraced, but he had failed to give her his backing as she cried a day earlier.

A spokesman said her upset demeanour was due to a personal matter.

Roll of honour

Who has won what so far in the West Asia Premiership season?

Western Clubs Champions League - Winners: Abu Dhabi Harlequins; Runners up: Bahrain

Dubai Rugby Sevens - Winners: Dubai Exiles; Runners up: Jebel Ali Dragons

West Asia Premiership - Winners: Jebel Ali Dragons; Runners up: Abu Dhabi Harlequins

UAE Premiership Cup - Winners: Abu Dhabi Harlequins; Runners up: Dubai Exiles

West Asia Cup - Winners: Bahrain; Runners up: Dubai Exiles

West Asia Trophy - Winners: Dubai Hurricanes; Runners up: DSC Eagles

Final West Asia Premiership standings - 1. Jebel Ali Dragons; 2. Abu Dhabi Harlequins; 3. Bahrain; 4. Dubai Exiles; 5. Dubai Hurricanes; 6. DSC Eagles; 7. Abu Dhabi Saracens

Fixture (UAE Premiership final) - Friday, April 13, Al Ain – Dubai Exiles v Abu Dhabi Harlequins

Company%20Profile
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Updated: May 22, 2024, 5:34 AM`