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Home | Lifestyle | Heatwaves To Worsen Air Quality Additional Climate Penalty Wmo

Heatwaves to worsen air quality, additional climate penalty: WMO

The regions with the strongest projected climate penalty, mainly in Asia, are home to roughly a quarter of the world's population.

By ANI
Published Date - 02:42 PM, Thu - 8 September 22
Heatwaves to worsen air quality, additional climate penalty: WMO
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Geneva: Severe, long-lasting heatwaves and more frequent wildfires could lead to even worse air quality, an additional “climate penalty” for hundreds of millions of people, World Meteorological Organization (WMO) warned.

According to WMO’s annual Air Quality and Climate Bulletin released on Wednesday, an anticipated rise in the frequency, intensity and duration of heatwaves and an associated increase in wildfires this century are likely to worsen air quality, harming human health and ecosystems, reports Xinhua news agency.

“As the globe warms, wildfires and associated air pollution are expected to increase, even under a low emission scenario. In addition to human health impacts, this will also affect ecosystems as air pollutants settle from the atmosphere to Earth’s surface,” said WMO Secretary-General Petteri Taalas.

“We have seen this in the heatwaves in Europe and China this year when stable high atmospheric conditions, sunlight and low wind speeds were conducive to high pollution levels.

“This is a foretaste of the future because we expect a further increase in the frequency, intensity and duration of heatwaves, which could lead to even worse air quality, a phenomenon known as the ‘climate penalty’.” he said.

The “climate penalty” refers specifically to the climate change amplification effect on ground-level ozone production, which negatively impacts the air that people breathe.

The regions with the strongest projected climate penalty, mainly in Asia, are home to roughly a quarter of the world’s population.

Climate change could exacerbate surface ozone pollution episodes, leading to detrimental health impacts for hundreds of millions of people.

According to the Intergovernmental Panel on Climate Change (IPCC), the probability of catastrophic wildfire events is likely to increase by 40 to 60 per cent by the end of this century under a high emission scenario, and by 30 to 50 per cent under a low emission scenario.

If greenhouse gas emissions remain high and global temperatures rise by three degrees Celsius from pre-industrial levels by the second half of the 21st century, surface ozone levels are expected to increase across heavily polluted areas, particularly in Asia.

While most of the ozone increase will be due to an increase in emissions from fossil fuel combustion, roughly a fifth of this increase will be due to climate change, most likely realized through increased heatwaves, which amplify air pollution episodes.

As a result, heatwaves — which are increasingly common due to climate change — are likely to continue leading to a degradation in air quality, IPCC said.

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