Earth’s temperature has varied more over the past 485 million years than previously thought and is strongly linked to the amount of carbon dioxide in the atmosphere, a study has found.
The research offers the most detailed picture yet of how global temperatures have changed in the 541 million years since the start of the current Phanerozoic Aeon, which is marked by an abundance of fossils. Over the aeon, the global mean temperature has spanned 11°C to 36°C, with colder temperatures associated with lower levels of carbon dioxide, or CO2, and warmer with higher levels
“This research illustrates clearly that carbon dioxide is the dominant control on global temperatures across geological time,” said Jessica Tierney, a paleoclimatologist at the University of Arizona and a co-author of the new paper. “When CO2 is low, the temperature is cold; when CO2 is high, the temperature is warm.”
The study also dismisses the idea that the Earth has a “tropical thermostat”, with a maximum temperature that the tropics can reach, Emily Judd, the lead author of the paper and a former postdoctoral researcher at the National Museum of Natural History and the University of Arizona, told The National. “In the 1990s and early 2000s, several studies generated data, based on the shells from foraminifera – or little calcified “sea bugs”, from warm intervals in Earth’s past with elevation CO2 concentrations that suggested tropical temperatures weren’t that much warmer than today,” she said. “This sparked some controversy over whether there was an upper limit for tropical warmth.”
However, researchers have since shown the data had been altered by processes that occurred after the organisms had died. “In our study, we carefully screen all the data that went into our analysis to make sure that any data that were potentially altered by processes occurring after the death of the organism were excluded,” she said. “Both those subsequent studies that carefully examined each specimen and our work dispel the idea of a tropical thermostat, and demonstrate that under elevated CO2 concentrations, Earth’s tropics experience significant warming above their current temperature.”
The findings indicate that Earth’s current global mean temperature of 15°C is cooler than it has been over much of the aeon. But greenhouse gases are warming the planet at a substantially quicker rate than even the fastest warming events of the Phanerozoic. That puts species and ecosystems around the world at risk and is causing a rapid rise in sea levels, the researchers said. Other episodes of rapid climate change during the Phanerozoic have sparked mass extinctions, they added.
Using an approach called data assimilation, researchers combined data from the geologic record and climate models to create a more complete understanding of ancient climates. But while the new paper is the most robust study of temperature change to date, it is far from a finished project, Brian Huber from the Smithsonian’s National Museum of Natural History, said.
“We all agree that this isn’t the final curve,” he added. “Researchers will continue to uncover additional clues about the deep past, which will help revise this curve down the road.”
Five ways to get on track to reduce your carbon footprint
How to watch Ireland v Pakistan in UAE
When: The one-off Test starts on Friday, May 11
What time: Each day’s play is scheduled to start at 2pm UAE time.
TV: The match will be broadcast on OSN Sports Cricket HD. Subscribers to the channel can also stream the action live on OSN Play.
AWARDS
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THE%20SPECS
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PROFILE OF CURE.FIT
Started: July 2016
Founders: Mukesh Bansal and Ankit Nagori
Based: Bangalore, India
Sector: Health & wellness
Size: 500 employees
Investment: $250 million
Investors: Accel, Oaktree Capital (US); Chiratae Ventures, Epiq Capital, Innoven Capital, Kalaari Capital, Kotak Mahindra Bank, Piramal Group’s Anand Piramal, Pratithi Investment Trust, Ratan Tata (India); and Unilever Ventures (Unilever’s global venture capital arm)
Another way to earn air miles
In addition to the Emirates and Etihad programmes, there is the Air Miles Middle East card, which offers members the ability to choose any airline, has no black-out dates and no restrictions on seat availability. Air Miles is linked up to HSBC credit cards and can also be earned through retail partners such as Spinneys, Sharaf DG and The Toy Store.
An Emirates Dubai-London round-trip ticket costs 180,000 miles on the Air Miles website. But customers earn these ‘miles’ at a much faster rate than airline miles. Adidas offers two air miles per Dh1 spent. Air Miles has partnerships with websites as well, so booking.com and agoda.com offer three miles per Dh1 spent.
“If you use your HSBC credit card when shopping at our partners, you are able to earn Air Miles twice which will mean you can get that flight reward faster and for less spend,” says Paul Lacey, the managing director for Europe, Middle East and India for Aimia, which owns and operates Air Miles Middle East.
Islamophobia definition
A widely accepted definition was made by the All Party Parliamentary Group on British Muslims in 2019: “Islamophobia is rooted in racism and is a type of racism that targets expressions of Muslimness or perceived Muslimness.” It further defines it as “inciting hatred or violence against Muslims”.
Engine: 5.6-litre V8
Transmission: seven-speed automatic
Power: 400hp
Torque: 560Nm
Price: Dh234,000 - Dh329,000
On sale: now
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
Read more about the coronavirus
MATCH INFO
What: 2006 World Cup quarter-final
When: July 1
Where: Gelsenkirchen Stadium, Gelsenkirchen, Germany
Result:
England 0 Portugal 0
(Portugal win 3-1 on penalties)
More from Neighbourhood Watch:
Generational responses to the pandemic
Devesh Mamtani from Century Financial believes the cash-hoarding tendency of each generation is influenced by what stage of the employment cycle they are in. He offers the following insights:
Baby boomers (those born before 1964): Owing to market uncertainty and the need to survive amid competition, many in this generation are looking for options to hoard more cash and increase their overall savings/investments towards risk-free assets.
Generation X (born between 1965 and 1980): Gen X is currently in its prime working years. With their personal and family finances taking a hit, Generation X is looking at multiple options, including taking out short-term loan facilities with competitive interest rates instead of dipping into their savings account.
Millennials (born between 1981 and 1996): This market situation is giving them a valuable lesson about investing early. Many millennials who had previously not saved or invested are looking to start doing so now.
How to wear a kandura
Dos
- Wear the right fabric for the right season and occasion
- Always ask for the dress code if you don’t know
- Wear a white kandura, white ghutra / shemagh (headwear) and black shoes for work
- Wear 100 per cent cotton under the kandura as most fabrics are polyester
Don’ts
- Wear hamdania for work, always wear a ghutra and agal
- Buy a kandura only based on how it feels; ask questions about the fabric and understand what you are buying
'The worst thing you can eat'
Trans fat is typically found in fried and baked goods, but you may be consuming more than you think.
Powdered coffee creamer, microwave popcorn and virtually anything processed with a crust is likely to contain it, as this guide from Mayo Clinic outlines:
Baked goods - Most cakes, cookies, pie crusts and crackers contain shortening, which is usually made from partially hydrogenated vegetable oil. Ready-made frosting is another source of trans fat.
Snacks - Potato, corn and tortilla chips often contain trans fat. And while popcorn can be a healthy snack, many types of packaged or microwave popcorn use trans fat to help cook or flavour the popcorn.
Fried food - Foods that require deep frying — french fries, doughnuts and fried chicken — can contain trans fat from the oil used in the cooking process.
Refrigerator dough - Products such as canned biscuits and cinnamon rolls often contain trans fat, as do frozen pizza crusts.
Creamer and margarine - Nondairy coffee creamer and stick margarines also may contain partially hydrogenated vegetable oils.
Profile of Tarabut Gateway
Founder: Abdulla Almoayed
Based: UAE
Founded: 2017
Number of employees: 35
Sector: FinTech
Raised: $13 million
Backers: Berlin-based venture capital company Target Global, Kingsway, CE Ventures, Entrée Capital, Zamil Investment Group, Global Ventures, Almoayed Technologies and Mad’a Investment.
Pathaan
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Real estate tokenisation project
Dubai launched the pilot phase of its real estate tokenisation project last month.
The initiative focuses on converting real estate assets into digital tokens recorded on blockchain technology and helps in streamlining the process of buying, selling and investing, the Dubai Land Department said.
Dubai’s real estate tokenisation market is projected to reach Dh60 billion ($16.33 billion) by 2033, representing 7 per cent of the emirate’s total property transactions, according to the DLD.
New UK refugee system
- A new “core protection” for refugees moving from permanent to a more basic, temporary protection
- Shortened leave to remain - refugees will receive 30 months instead of five years
- A longer path to settlement with no indefinite settled status until a refugee has spent 20 years in Britain
- To encourage refugees to integrate the government will encourage them to out of the core protection route wherever possible.
- Under core protection there will be no automatic right to family reunion
- Refugees will have a reduced right to public funds
How England have scored their set-piece goals in Russia
Three Penalties
v Panama, Group Stage (Harry Kane)
v Panama, Group Stage (Kane)
v Colombia, Last 16 (Kane)
Four Corners
v Tunisia, Group Stage (Kane, via John Stones header, from Ashley Young corner)
v Tunisia, Group Stage (Kane, via Harry Maguire header, from Kieran Trippier corner)
v Panama, Group Stage (Stones, header, from Trippier corner)
v Sweden, Quarter-Final (Maguire, header, from Young corner)
One Free-Kick
v Panama, Group Stage (Stones, via Jordan Henderson, Kane header, and Raheem Sterling, from Tripper free-kick)
