‏إظهار الرسائل ذات التسميات study. إظهار كافة الرسائل
‏إظهار الرسائل ذات التسميات study. إظهار كافة الرسائل

Study warns of 'nightmarish' periods of extreme heat in tropical regions

Researchers fear billions of people will be overexposed to extremely dangerous temperatures "in a way that we just fundamentally haven't seen".

Severe heatwaves — made hotter and more frequent by climate change — are already being felt across the world, threatening human health, wildlife and crop yields.
Severe heatwaves — made hotter and more frequent by climate change — are already being felt across the world, threatening human health, wildlife and crop yields. (AFP)
Millions of people in the tropics could be exposed to dangerous heat for half the year by 2100 even if humanity manages to meet climate goals, researchers have warned. In the most likely scenario, the world would miss those targets — potentially subjecting people across the tropics to harmful temperatures most days of each typical year by the end of the century, according to the study. If emissions go unchecked, large numbers of people in these regions could face potentially "nightmarish" periods of extreme heat. "There's a possibility that if we don't get our act together, billions of people are going to be really, really overexposed to these extremely dangerous temperatures in a way that we just fundamentally haven't seen," said lead author Lucas Vargas Zeppetello of Harvard University. Most climate projections predict temperature increases under different policy scenarios, but do not say which of those pathways is more likely. In this study, published in the journal Communications Earth and Environment, researchers estimated potential exposure to dangerous heat and humidity. They used statistical projections to predict levels of carbon dioxide emissions from human activity and the resultant levels of global warming. They found that many people in tropical regions could face dangerous heat levels for half the year by the end of the century, even if the world limits temperature rises to the Paris climate deal goal of less than two degrees Celsius (35.6 degrees Fahrenheit) above preindustrial levels. Outside the tropics, they said deadly heatwaves will likely become annual occurrences. READ MORE: As the climate is changing, which animals will adjust and survive? [embed]https://www.youtube.com/watch?v=wmUy0OtG4Ec[/embed] 'Dangerous' levels  The researchers used a heat index that puts "dangerous" levels at 39.4C, while temperatures above 51C are considered "extremely dangerous" and totally unsafe for humans. The extreme measure was originally developed for people working in scorching indoor environments, like a ship's boiler room, and have rarely been observed outdoors, Zeppetello said. But by the end of the century, the researcher said it was "virtually guaranteed" that people in some parts of the tropics would experience this level of heat every year unless emissions are severely curtailed, with swathes of sub-Saharan Africa and India particularly at risk. "That's pretty scary," he told AFP, adding that even walking outside would be dangerous under those conditions. Earth has warmed nearly 1.2C so far and current predictions based on countries' carbon-cutting pledges would see the world far exceed the Paris Agreement's 2C target for 2100, let alone its more ambitious 1.5C aspiration. In their research,Zeppetello and colleagues analysed predictions from global climate models, human population projections, and looked at the relationship between economic growth and carbon emissions. They estimated that there is only a 0.1 percent chance of limiting global average warming to 1.5C by 2100, projecting that the world is likely to reach 1.8C by 2050. In 2100, the researchers found, the most likely global average temperature rise would be 3C, which Zeppetello said would spell "nightmarish" conditions for many people. In a worst case scenario, in which emissions continue unchecked, he said extreme temperatures could last up to two months every year in parts of the tropics. But he said it depends on how swiftly humanity can cut emissions. "We don't have to go to that world. There's nothing right now that says it is a certainty, but people need to be aware of just how dangerous that would be if it were to pass," he said. The researchers said under all scenarios there could be a large increase in heat-related illnesses, particularly among the elderly, vulnerable and those working outside. READ MORE: Drought hits half of China in worst heatwave on record Source: AFP

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Sanctions ‘Cripple’ Russian Economy, Study Says

The Russian economy has been deeply damaged by sanctions and the exit of international business since the country invaded Ukraine, according to a new report by Yale University business experts and economists.

Even though Moscow has been able to pull in billions of dollars from continued energy sales at elevated prices, largely unpublished data shows that much of its domestic economic activity has stalled since the Feb. 24 invasion, according to the report released in late July.

"The findings of our comprehensive economic analysis of Russia are powerful and indisputable: Not only have sanctions and the business retreat worked, they have thoroughly crippled the Russian economy at every level," said the report from the Yale School of Management.

"Russian domestic production has come to a complete standstill with no capacity to replace lost businesses, products and talent," the 118-page report said.

The report was produced by Jeffrey Sonnenfeld, president of the Yale Chief Executive Leadership Institute, and other members of the institute, a mix of economists and business management experts.

With Moscow having halted or pared the release of official economic statistics, including crucial trade figures, Sonnenfeld's group tapped into data held by companies, banks, consultants, Russian trading partners and others to build a picture of Russian economic performance.

They also said they obtained unreleased data from experts on the Russian economy, and data in other languages which supported their conclusions.

Even if Russia is able to earn more foreign exchange on gas and oil exports, that has not offset the impact of Western sanctions.

And, they argue, the country's dependence on Europe to buy 83% of its energy exports leaves it under a greater medium-term threat.

"Russia is far more dependent on Europe than Europe is on Russia," they said.

Car industry crashes

Russia largely survived Western economic sanctions after Moscow's 2014 seizure of the Ukraine region of Crimea.

President Vladimir Putin pushed a program of replacing some imports with domestic products and built up a cushion of financial reserves.

But the country's industry remained heavily driven by foreign capital investment and the import of higher-tech inputs that Russia had not mastered, like semiconductors.

The barrage of deeper sanctions after the invasion took aim at both of those vulnerabilities, the report said.

Some 1,000 foreign companies halted their activities in the country, potentially impacting up to 5 million jobs, according to the report.

Industrial output plunged, and Russian retail sales and consumer spending have fallen at an annual rate of 15-20%.

Imports have plunged across the board, the report said; crucial imports from China fell by more than half.

A key example of Russian problems, according to the report, is the automobile sector.

Car sales went from 100,000 a month to 27,000 a month, and output has stalled due to a lack of parts and machinery.

Without access to imported components, Russian producers are putting out cars without airbags or modern anti-lock brakes, and only with manual transmissions.

Threat to gas revenues

The report challenged the belief that the Russian economy was surviving thanks to the tens of billions of dollars the country reaps each month from oil and gas exports.

Last week the IMF said the Russian economy, though contracting, was doing better than expected due to its energy and commodity export income.

The Yale report said data indicates energy revenues have been falling for the last three months.

If Western Europe succeeds in cutting itself off from Russian natural gas, Moscow faces an "unsolvable" situation with a lack of a market for its output, according to the report.

"Any decrease in oil and gas revenues or oil and gas export volumes would immediately put a strain on the Kremlin's budget," it said.


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