The disastrous consequences of climate tipping points could be averted if global warming were reversed quickly enough, new research suggests.
Crossing these limits was considered a point of no return, but a University of Exeter study concludes that thresholds could be "temporarily exceeded" without causing permanent shifts.
Tipping points are defined as small changes within a complex system causing disproportionately large changes to the system. They can be compared to the game of Jenga where bricks are removed from a tower one by one until the 'tipping brick' causes the whole edifice to crumble.
Climate tipping points are a little more nuanced and can be grouped into fast-onset and slow-onset categories.
The study focused on four examples: Amazon rainforest dieback – fast onset; Indian summer monsoon – fast onset; Atlantic Meridional Overturning Circulation – slow onset; and ice sheet melt – slow onset.
For the study, the researchers calculated "time to act" as the time taken to reverse warming and stabilise at 1.5°C above pre-industrial levels.
The window available to recover the damage spawned by reaching these tipping points depended on whether they were fast or slow onset and the level of global warming at the time.
"The more extreme the warming, the less time we would have to prevent tipping points," said lead author Dr Paul Ritchie, of the university's Global Systems Institute and the Department of Mathematics.
"This is especially true for fast-onset tipping points like Amazon forest dieback and disruption to monsoons, where irreversible change could take place in a matter of decades.
"Slow-onset tipping points take place over a timescale of many centuries and, depending on the level of warming, this would give us more time to act."
Climate tipping points and thresholds
Dr Ritchie told The National that it was "important to highlight the difference between tipping points and tipping point thresholds" which are "frequently overlooked in the literature".
"The tipping point threshold is the critical level of forcing (i.e. global mean warming) at which tipping would first be triggered if the forcing stayed constant at that level for a sufficiently long period of time," he said.
"The tipping point itself is the point at which we actually observe the transition. So if the forcing were to continue to rise after crossing the threshold, then the tipping point would be later than the threshold.
Need to act on climate change still urgent
Even if there is a little more leeway on some climate tipping points than others, Dr Ritchie said it shouldn't lead to complacency among global policymakers.
"Action still needs to be taken now to reduce global warming because ultimately the safest thing to do is not to cross these thresholds," he said.
"However, if we are to cross a threshold then the key message is to not give up, there is still the hope that we can avoid the disastrous consequences of a climate tipping point if global warming can be reversed quickly."
The four climate tipping points in the study
1. Amazon rainforest dieback - fast onset
The Amazon rainforest is one of the largest natural carbon sinks. Large-scale dieback of the forest, via increased temperatures and drying, or direct deforestation, would further amplify global warming.
2. Indian summer monsoon - fast onset
The Indian monsoon is crucial for the local economy, as well as being important for agriculture, river systems and water stock. However, an increase in the planetary albedo (increases in the atmospheric brown cloud haze over India) has the capability of switching off the monsoon.
3. Atlantic Meridional Overturning Circulation – slow onset
The Amoc is a large-scale circulation current in the Atlantic Ocean, which is responsible for giving western Europe its relatively mild climate when compared to other locations at a similar latitude (such as Siberia). Adding freshwater to the North Atlantic could disrupt the downwelling that occurs in this region leading to a collapse of the large-scale current.
4. Ice sheet melt – slow onset
The melting of major ice sheets would lead to significant increases in sea level. Under increased warming ice starts to melt, which results in less incoming radiation being reflected and more being absorbed. This in turn leads to hotter temperatures and more ice melting, possibly generating a feedback loop to an ice-free state – but crucially over many centuries.
More on climate change
UK to set out radical climate change targets ahead of Cop26
'Next 10 years are critical’: Prince William backs £50m climate change project Earthshots
Boris Johnson and Sir David Attenborough push climate change at UN’s top table
Paltan
Producer: JP Films, Zee Studios
Director: JP Dutta
Cast: Jackie Shroff, Sonu Sood, Arjun Rampal, Siddhanth Kapoor, Luv Sinha and Harshvardhan Rane
Rating: 2/5
COMPANY%20PROFILE
%3Cp%3E%3Cstrong%3EName%3A%20%3C%2Fstrong%3EQureos%0D%3Cbr%3E%3Cstrong%3EBased%3A%20%3C%2Fstrong%3EUAE%0D%3Cbr%3E%3Cstrong%3ELaunch%20year%3A%20%3C%2Fstrong%3E2021%0D%3Cbr%3E%3Cstrong%3ENumber%20of%20employees%3A%20%3C%2Fstrong%3E33%0D%3Cbr%3E%3Cstrong%3ESector%3A%20%3C%2Fstrong%3ESoftware%20and%20technology%0D%3Cbr%3E%3Cstrong%3EFunding%3A%20%3C%2Fstrong%3E%243%20million%0D%3Cbr%3E%3C%2Fp%3E%0A
Killing of Qassem Suleimani
Killing of Qassem Suleimani
The five pillars of Islam
1. Fasting
2. Prayer
3. Hajj
4. Shahada
5. Zakat
Ramy%3A%20Season%203%2C%20Episode%201
%3Cp%3E%3Cstrong%3ECreators%3A%20%3C%2Fstrong%3EAri%20Katcher%2C%20Ryan%20Welch%2C%20Ramy%20Youssef%0D%3Cbr%3E%3Cstrong%3EStars%3A%20%3C%2Fstrong%3ERamy%20Youssef%2C%20Amr%20Waked%2C%20Mohammed%20Amer%0D%3Cbr%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%204%2F5%3C%2Fp%3E%0A
Ferrari 12Cilindri specs
Engine: naturally aspirated 6.5-liter V12
Power: 819hp
Torque: 678Nm at 7,250rpm
Price: From Dh1,700,000
Available: Now
If you go:
The flights: Etihad, Emirates, British Airways and Virgin all fly from the UAE to London from Dh2,700 return, including taxes
The tours: The Tour for Muggles usually runs several times a day, lasts about two-and-a-half hours and costs £14 (Dh67)
Harry Potter and the Cursed Child is on now at the Palace Theatre. Tickets need booking significantly in advance
Entrance to the Harry Potter exhibition at the House of MinaLima is free
The hotel: The grand, 1909-built Strand Palace Hotel is in a handy location near the Theatre District and several of the key Harry Potter filming and inspiration sites. The family rooms are spacious, with sofa beds that can accommodate children, and wooden shutters that keep out the light at night. Rooms cost from £170 (Dh808).
Sole survivors
- Cecelia Crocker was on board Northwest Airlines Flight 255 in 1987 when it crashed in Detroit, killing 154 people, including her parents and brother. The plane had hit a light pole on take off
- George Lamson Jr, from Minnesota, was on a Galaxy Airlines flight that crashed in Reno in 1985, killing 68 people. His entire seat was launched out of the plane
- Bahia Bakari, then 12, survived when a Yemenia Airways flight crashed near the Comoros in 2009, killing 152. She was found clinging to wreckage after floating in the ocean for 13 hours.
- Jim Polehinke was the co-pilot and sole survivor of a 2006 Comair flight that crashed in Lexington, Kentucky, killing 49.
F1 The Movie
Starring: Brad Pitt, Damson Idris, Kerry Condon, Javier Bardem
Director: Joseph Kosinski
Rating: 4/5
Match info
Manchester City 3 (Jesus 22', 50', Sterling 69')
Everton 1 (Calvert-Lewin 65')
MATCH INFO
Chelsea 1
Alonso (62')
Huddersfield Town 1
Depoitre (50')
MATCH INFO
Quarter-finals
Saturday (all times UAE)
England v Australia, 11.15am
New Zealand v Ireland, 2.15pm
Sunday
Wales v France, 11.15am
Japan v South Africa, 2.15pm
The%20specs
%3Cp%3E%3Cstrong%3EEngine%3A%20%3C%2Fstrong%3E6.5-litre%20V12%3Cbr%3E%3Cstrong%3EPower%3A%20%3C%2Fstrong%3E725hp%20at%207%2C750rpm%3Cbr%3E%3Cstrong%3ETorque%3A%20%3C%2Fstrong%3E716Nm%20at%206%2C250rpm%3Cbr%3E%3Cstrong%3ETransmission%3A%20%3C%2Fstrong%3E8-speed%20dual-clutch%20auto%3Cbr%3E%3Cstrong%3EOn%20sale%3A%20%3C%2Fstrong%3EQ4%202023%3Cbr%3E%3Cstrong%3EPrice%3A%20%3C%2Fstrong%3EFrom%20Dh1%2C650%2C000%3C%2Fp%3E%0A
The%20National%20selections
%3Cp%3E6pm%3A%20Barakka%3Cbr%3E6.35pm%3A%20Dhahabi%3Cbr%3E7.10pm%3A%20Mouheeb%3Cbr%3E7.45pm%3A%20With%20The%20Moonlight%3Cbr%3E8.20pm%3A%20Remorse%3Cbr%3E8.55pm%3A%20Ottoman%20Fleet%3Cbr%3E9.30pm%3A%20Tranquil%20Night%3C%2Fp%3E%0A
Top Hundred overseas picks
London Spirit: Kieron Pollard, Riley Meredith
Welsh Fire: Adam Zampa, David Miller, Naseem Shah
Manchester Originals: Andre Russell, Wanindu Hasaranga, Sean Abbott
Northern Superchargers: Dwayne Bravo, Wahab Riaz
Oval Invincibles: Sunil Narine, Rilee Rossouw
Trent Rockets: Colin Munro
Birmingham Phoenix: Matthew Wade, Kane Richardson
Southern Brave: Quinton de Kock
Killing of Qassem Suleimani
Water waste
In the UAE’s arid climate, small shrubs, bushes and flower beds usually require about six litres of water per square metre, daily. That increases to 12 litres per square metre a day for small trees, and 300 litres for palm trees.
Horticulturists suggest the best time for watering is before 8am or after 6pm, when water won't be dried up by the sun.
A global report published by the Water Resources Institute in August, ranked the UAE 10th out of 164 nations where water supplies are most stretched.
The Emirates is the world’s third largest per capita water consumer after the US and Canada.
Safety 'top priority' for rival hyperloop company
The chief operating officer of Hyperloop Transportation Technologies, Andres de Leon, said his company's hyperloop technology is “ready” and safe.
He said the company prioritised safety throughout its development and, last year, Munich Re, one of the world's largest reinsurance companies, announced it was ready to insure their technology.
“Our levitation, propulsion, and vacuum technology have all been developed [...] over several decades and have been deployed and tested at full scale,” he said in a statement to The National.
“Only once the system has been certified and approved will it move people,” he said.
HyperloopTT has begun designing and engineering processes for its Abu Dhabi projects and hopes to break ground soon.
With no delivery date yet announced, Mr de Leon said timelines had to be considered carefully, as government approval, permits, and regulations could create necessary delays.
'Midnights'
%3Cp%3E%3Cstrong%3EArtist%3A%3C%2Fstrong%3E%20Taylor%20Swift%26nbsp%3B%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ELabel%3A%3C%2Fstrong%3E%20Republic%20Records%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%204%2F5%3C%2Fp%3E%0A
Tearful appearance
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.
THE SIXTH SENSE
Starring: Bruce Willis, Toni Collette, Hayley Joel Osment
Director: M. Night Shyamalan
Rating: 5/5
UAE Premiership
Results
Dubai Exiles 24-28 Jebel Ali Dragons
Abu Dhabi Harlequins 43-27 Dubai Hurricanes
Fixture
Friday, March 29, Abu Dhabi Harlequins v Jebel Ali Dragons, The Sevens, Dubai
The biog
Place of birth: Kalba
Family: Mother of eight children and has 10 grandchildren
Favourite traditional dish: Al Harees, a slow cooked porridge-like dish made from boiled cracked or coarsely ground wheat mixed with meat or chicken
Favourite book: My early life by Sheikh Dr Sultan bin Muhammad Al Qasimi, the Ruler of Sharjah
Favourite quote: By Sheikh Zayed, the UAE's Founding Father, “Those who have no past will have no present or future.”
TOURNAMENT INFO
Fixtures
Sunday January 5 - Oman v UAE
Monday January 6 - UAE v Namibia
Wednesday January 8 - Oman v Namibia
Thursday January 9 - Oman v UAE
Saturday January 11 - UAE v Namibia
Sunday January 12 – Oman v Namibia
UAE squad
Ahmed Raza (captain), Rohan Mustafa, Mohammed Usman, CP Rizwan, Waheed Ahmed, Zawar Farid, Darius D’Silva, Karthik Meiyappan, Jonathan Figy, Vriitya Aravind, Zahoor Khan, Junaid Siddique, Basil Hameed, Chirag Suri
The%20specs
%3Cp%3E%3Cstrong%3EPowertrain%3A%20%3C%2Fstrong%3ESingle%20electric%20motor%0D%3Cbr%3E%3Cstrong%3EPower%3A%20%3C%2Fstrong%3E201hp%0D%3Cbr%3E%3Cstrong%3ETorque%3A%20%3C%2Fstrong%3E310Nm%0D%3Cbr%3E%3Cstrong%3ETransmission%3A%20%3C%2Fstrong%3ESingle-speed%20auto%0D%3Cbr%3E%3Cstrong%3EBattery%3A%20%3C%2Fstrong%3E53kWh%20lithium-ion%20battery%20pack%20(GS%20base%20model)%3B%2070kWh%20battery%20pack%20(GF)%0D%3Cbr%3E%3Cstrong%3ETouring%20range%3A%20%3C%2Fstrong%3E350km%20(GS)%3B%20480km%20(GF)%0D%3Cbr%3E%3Cstrong%3EPrice%3A%20%3C%2Fstrong%3EFrom%20Dh129%2C900%20(GS)%3B%20Dh149%2C000%20(GF)%0D%3Cbr%3E%3Cstrong%3EOn%20sale%3A%3C%2Fstrong%3E%20Now%3C%2Fp%3E%0A
Farasan Boat: 128km Away from Anchorage
Director: Mowaffaq Alobaid
Stars: Abdulaziz Almadhi, Mohammed Al Akkasi, Ali Al Suhaibani
Rating: 4/5
COMPANY PROFILE
Name: Lamsa
Founder: Badr Ward
Launched: 2014
Employees: 60
Based: Abu Dhabi
Sector: EdTech
Funding to date: $15 million
ESSENTIALS
The flights
Emirates flies from Dubai to Phnom Penh via Yangon from Dh2,700 return including taxes. Cambodia Bayon Airlines and Cambodia Angkor Air offer return flights from Phnom Penh to Siem Reap from Dh250 return including taxes. The flight takes about 45 minutes.
The hotels
Rooms at the Raffles Le Royal in Phnom Penh cost from $225 (Dh826) per night including taxes. Rooms at the Grand Hotel d'Angkor cost from $261 (Dh960) per night including taxes.
The tours
A cyclo architecture tour of Phnom Penh costs from $20 (Dh75) per person for about three hours, with Khmer Architecture Tours. Tailor-made tours of all of Cambodia, or sites like Angkor alone, can be arranged by About Asia Travel. Emirates Holidays also offers packages.
Key facilities
- Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
- Premier League-standard football pitch
- 400m Olympic running track
- NBA-spec basketball court with auditorium
- 600-seat auditorium
- Spaces for historical and cultural exploration
- An elevated football field that doubles as a helipad
- Specialist robotics and science laboratories
- AR and VR-enabled learning centres
- Disruption Lab and Research Centre for developing entrepreneurial skills
UK-EU trade at a glance
EU fishing vessels guaranteed access to UK waters for 12 years
Co-operation on security initiatives and procurement of defence products
Youth experience scheme to work, study or volunteer in UK and EU countries
Smoother border management with use of e-gates
Cutting red tape on import and export of food
UAE currency: the story behind the money in your pockets
PREMIER LEAGUE FIXTURES
All times UAE ( 4 GMT)
Saturday
West Ham United v Tottenham Hotspur (3.30pm)
Burnley v Huddersfield Town (7pm)
Everton v Bournemouth (7pm)
Manchester City v Crystal Palace (7pm)
Southampton v Manchester United (7pm)
Stoke City v Chelsea (7pm)
Swansea City v Watford (7pm)
Leicester City v Liverpool (8.30pm)
Sunday
Brighton and Hove Albion v Newcastle United (7pm)
Monday
Arsenal v West Bromwich Albion (11pm)
UAE currency: the story behind the money in your pockets
Global state-owned investor ranking by size
|
1.
|
United States
|
|
2.
|
China
|
|
3.
|
UAE
|
|
4.
|
Japan
|
|
5
|
Norway
|
|
6.
|
Canada
|
|
7.
|
Singapore
|
|
8.
|
Australia
|
|
9.
|
Saudi Arabia
|
|
10.
|
South Korea
|
Dubai Rugby Sevens
November 30, December 1-2
International Vets
Christina Noble Children’s Foundation fixtures
Thursday, November 30:
10.20am, Pitch 3, v 100 World Legends Project
1.20pm, Pitch 4, v Malta Marauders
Friday, December 1:
9am, Pitch 4, v SBA Pirates
Specs
Engine: 51.5kW electric motor
Range: 400km
Power: 134bhp
Torque: 175Nm
Price: From Dh98,800
Available: Now
VEZEETA PROFILE
Date started: 2012
Founder: Amir Barsoum
Based: Dubai, UAE
Sector: HealthTech / MedTech
Size: 300 employees
Funding: $22.6 million (as of September 2018)
Investors: Technology Development Fund, Silicon Badia, Beco Capital, Vostok New Ventures, Endeavour Catalyst, Crescent Enterprises’ CE-Ventures, Saudi Technology Ventures and IFC
