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Air quality improvements from COVID lockdowns confirmed

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COVID-19 lockdowns brought rapid and “unprecedented” improvements in air quality in some parts of the world – but not enough to halt climate change caused by global warming, UN weather experts said on Friday.

According to the World Meteorological Organization (WMO)’s Air Quality and Climate Bulletin, South East Asia saw a 40 per cent reduction in the level of harmful airborne particles caused by traffic and energy production in 2020.

China, Europe and North America also saw emissions reductions and improved air quality during the pandemic’s first year, while countries such as Sweden saw less dramatic improvements because existing air quality contained comparatively lower microparticle levels (PM2.5) of harmful sulphur dioxide (SO2), nitrogen oxides (NOx), carbon monoxide (CO) and ozone (O3).

Atmospheric experiment

Dr Oksana Tarasova, chief of WMO’s Atmospheric Environment Research Division, explained that although the clean air development had been welcome for many people with breathing difficulties, the absence of harmful microparticles left the path clear for naturally occurring ozone, “which is one of most dangerous pollutants”.

“So, despite such an unexpected experiment with atmospheric chemistry, we noticed that in many parts of the world, even if you take down the transport and some other emissions, air quality would not meet the requirements of the World Health Organization (WHO),” she told journalists in Geneva.

‘Godzilla’ storm

Although human-caused emissions of air pollutants fell during COVID-19 movement restrictions and the accompanying global economic downturn, weather extremes fuelled by climate and environmental change triggered unprecedented sand storms including the June 2020 “Godzilla” dust cloud – the largest African dust storm on record – and wildfires from Australia to Siberia, which have worsened air quality significantly.

“This trend is continuing in 2021,” said WMO, pointing to devastating wildfires in North America, Europe and the Russian tundra, that have “affected air quality for millions, and sand and dust storms (that) have blanketed many regions and travelled across continents”.

4.5 million pollution victims

The UN agency noted that air pollution has a significant impact on human health. Estimates from the latest Global Burden of Disease assessment show that global mortality increased from 2.3 million in 1990 – with 91 per cent owing to particulate matter, nine per cent attributed to ozone – to 4.5 million in 2019 – 92 per cent from particulates, eight per cent from ozone).

The Air Quality and Climate Bulletin – WMO’s first – is based on studying key air-pollutants from more than 540 observation stations in and around 63 cities from 25 countries, across the world’s seven geographical regions.

Analysis showed decreases of up to 30–40 per cent overall of PM2.5 concentrations during full lockdown in 2020, compared with the same periods in 2015–2019.

WMO noted however that PM2.5 levels “exhibited complex behaviour even within the same region, with increases in some Spanish cities, for instance, which were attributed mainly to the long-range transport of African dust and/or biomass burning”.

Changes in ozone concentrations varied greatly across regions, ranging from no overall change to small increases – as in Europe – and larger increases (up 25 per cent in East Asia and up 30 per cent in South America).

Sulphur dioxide concentrations were 25 – 60 per cent lower in 2020 than during 2015–2019 for all regions, according to WMO’s Bulletin. Carbon monoxide levels were lower for all regions, with the largest decrease in South America, of up to approximately 40 per cent.

Wildfire cooling

Paradoxically, while intense wildfires generated “anomalously high” microparticle pollution in several parts of the world in 2020, WMO explained that forest fires in southwestern Australia in December 2018 and January 2019 “also led to temporary cooling across the southern hemisphere, comparable to that caused by ash from a volcanic eruption”.

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Global warming did the Unthinkable

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French ski resort closes permanently because there’s not enough snow, CNN informs. Winter is coming. And for yet another ski resort in France, that means facing up to the reality that there isn’t enough snow to carry on.

La Sambuy, a town which runs a family skiing destination near Mont Blanc in the French Alps, has decided to dismantle its ski lifts because global warming has shrunk its ski season to just a few weeks, meaning it’s no longer profitable to keep them open.

“Before, we used to have snow practically from the first of December up until the 30th of March,” La Sambuy’s mayor, Jacques Dalex, told CNN.

Last winter, however, there was only “four weeks of snow, and even then, not much snow,” he added. That meant “very quickly, stones and rocks appeared on the piste.”

Able to open for fewer than five weeks during January and February, Dalex said the resort was looking at an annual operating loss of roughly 500,000 euros ($530,000). Keeping the lifts going alone costs 80,000 euros per year.

La Sambuy isn’t a huge resort, with just three lifts and a handful of pistes reaching up to a top height of 1,850 meters (about 6,070 feet).

But with a range of slopes running from expert “black” to beginner “green” and relatively cheap ski passes, it was popular with families seeking more of a low-key Alps experience than offered by bigger, higher-altitude destinations.

UK snow report website On The Snow calls it “an idyllic place to visit, with exceptional panoramic views and everything you need in a friendly resort.”

La Sambuy is not the only French ski resort facing a meltdown. Last year, Saint-Firmin, another small Alpine ski destination, opted to remove its ski lift after seeing its winter season dwindle from months to weeks, a situation also blamed on climate change.

Mountain Wilderness, a French environmental group, says it has dismantled 22 ski lifts in France since 2001, and estimates that there are still 106 abandoned ski lifts across 59 sites in the country.

According to a report published in August by the scientific journal Nature Climate Change, 53% of 2,234 ski resorts surveyed in Europe are likely to experience “a very high snow supply risk” at 2 degrees Celsius (3.6 Fahrenheit) of global warming above pre-industrial levels, without use of artificial snow.

A report published in January in the Proceedings of the National Academy of Sciences journal found a “substantial possibility” of global temperature rises crossing this 2-degree Celsius threshold by mid-century.

La Sambuy’s Dalex said that “all winter sports resorts in France are impacted by global warming,” particularly those at a medium mountain altitude between 1,000 and 1,500 meters.

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G20 summit must formulate plan for Global South climate change threat

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The G20 summit in India must have a “concrete plan” for “scaled-up” green financing for the Global South as a critical strategy to combat climate change, affirms the founder of one of the world’s largest independent financial advisory, asset management and fintech organizations.

The comments from deVere Group’s Nigel Green comes as leaders of the Group of 20 top industrialised and developing countries will gather this weekend in New Delhi for a summit that will celebrate the end of India’s 12-month G20 presidency.

He says: Climate change is no longer a distant threat; it is a present reality. Rising global temperatures, extreme weather events, melting ice caps, and sea-level rise are already affecting communities, ecosystems, and economies worldwide. 

“The Global South, comprising developing nations with limited resources, bears a disproportionate burden in this climate crisis, despite contributing minimally to greenhouse gas emissions.

“As such, the leader of the G20 – the richest countries in the world – must use the summit starting in India this week to formulate a concrete plan for scaled-up green financing to help the Global South tackle the biggest issue of our time. 

“A failure to do this could, ultimately, have catastrophic consequences for our planet and its communities.”

Green financing encompasses a range of mechanisms designed to support sustainable, environmentally friendly projects that mitigate climate change and enhance resilience. 

These include investments in renewable energy, energy efficiency, climate adaptation, sustainable agriculture, and conservation efforts. 

“One of the major challenges faced by the Global South is access to financial resources needed for climate action. Developing nations often lack the financial capacity to invest in green projects without incurring significant debt,” says the deVere CEO.

“The G20 summit must play a pivotal role in bridging this financial gap by prioritising green financing and creating mechanisms to make it more accessible.”

G20 countries, being the largest economies in the world, must also “commit to increasing in a considerable way their financial contributions to international climate finance mechanisms. These funds are essential for providing support to developing nations in their efforts to mitigate emissions and adapt to the impacts of climate change,” he notes.

Nigel Green goes on to add that the G20 summit should also serve as a platform for fostering collaboration between developed and developing nations. 

This collaboration can take various forms, including knowledge sharing, technology transfer, and capacity building. 
In addition, to scale up climate action, it is crucial to engage the private sector. G20 countries can promote public-private partnerships and initiatives that attract private sector investment in green projects. 

“This can be achieved through incentives, guarantees, or risk-sharing mechanisms that make investments in sustainability more appealing to businesses.”

Innovation in financial instruments, such as green bonds and climate insurance, can unlock alternative funding sources for climate projects in developing nations. 

The deVere CEO says: “The G20 summit must urgently encourage the development and adoption of such instruments to diversify funding options.”

The G20 summit in India presents a crucial opportunity to prioritize green financing for the Global South as a key strategy to combat climate change. 

This summit can be a turning point in the global fight against climate change, demonstrating that unity, innovation, and commitment can drive transformative change toward a sustainable future for all.

“The urgency of climate action cannot be overstated, and the global community must act decisively. 

“By committing to green financing, promoting collaboration, and bridging the financial gap, the G20 can lead the way in ensuring that all nations, particularly those in the Global South, have the resources and support they need to address the climate crisis effectively,” concludes Nigel Green.

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To tackle wildfires, researchers in Europe team up with frontline forces

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The EU is seeking to limit growing threats from blazes through the use of satellites, artificial intelligence and unmanned aerial vehicles.

By  JACK MCGOVAN

Picture the following scene on the French island of Corsica: a local fire service uses a special surveillance camera to detect smoke in the area, quickly declare the outbreak of a blaze and mobilise a targeted response.

No, the action in the Biguglia municipality on Corsica’s northeastern coast wasn’t one of the many wildfire emergencies in Europe in 2023. Rather, it was a demonstration in October 2022 under an EU-funded research project to help regions in Europe counter threats from wildfires.

Teaming up

The Biguglia exercise used a smoke bomb to simulate the start of a fire and an extensive data network to trigger the rapid-reaction steps. It involved a service that has 1 300 firefighters who protect a population in this part of Corsica – the Mediterranean’s fourth-biggest island – that grows to around 400 000 in summer.

‘This first demonstration on Corsica was very positive,’ said Michael Pelissier, a firefighter who participated in the test.

As part of the EU project, called SAFERS, a similar firefighting exercise took place in the Piedmont region of Italy in February 2023 and two more trials are planned in Greece and Spain toward the end of this year.

After the next two demonstrations, we would like to push the management system forward in Europe and also beyond,’ said Claudio Rossi, who coordinates the project and is a senior researcher at an Italian research and innovation centre called the Links Foundation in the city of Turin.

With the help of EU funding, Europe’s research community is joining forces with firefighters to prevent fires from spreading or from happening at all. SAFERS is one of several EU projects to combine resources and know-how for tackling wildfires on the continent.

Satellite support

The focus of SAFERS is primarily on the use of satellites and artificial intelligence, or AI, to provide information that could help save lives and contain environmental damage.

‘The orchestrated utilisation of AI-powered solutions can increase resilience to forest fires,’ Rossi said.

Running for three and a half years through March 2024, the project features weather and hazard maps, fire-detection techniques, input from the general public and other tools to help local authorities prepare.

The ultimate goal is to build on the demonstrations in France, Greece, Italy and Spain and develop a comprehensive wildfire-control system for use around Europe.

By combining satellite images and other data, the system is intended to give first responders, decision-makers and ordinary people a clearer view of what’s happening and to facilitate the best responses.

Earth-observation data from the EU’s Copernicus programme is the primary source of information. This would be combined with data collected from smoke detectors, mobile applications, social media and forecast models.

Present threat

A stark reminder that wildfires pose a growing threat in Europe came from news images in July 2023 of tourists fleeing flames on the Greek island of Rhodes and blazes spreading near the Sicilian city of Palermo.

A month later, attention turned to Spain and Portugal where blazes destroyed more than 16 300 hectares of land and forced the evacuation of villages and tourist accommodations.

The Biguglia municipality on Corsica was chosen as a SAFERS demonstration site in part because of a major fire there in 2017.

‘These last years we have noticed that, notably because of global warming, the summer season has a tendency to expand,’ said Pelissier, the firefighter. ‘So we are increasingly threatened by forest fires.’

The EU, which recently doubled its firefighting fleet of aircraft, has deployed more than 10 planes, 500 firefighters and 100 vehicles to help control and quell wildfires in Greece alone during the summer of 2023.

Over the past two months, the EU has also mobilised such support for Cyprus and – outside Europe – Tunisia. The moves were closely coordinated with national authorities.

Hotspot training

Another EU-funded project – TREEADS – plans to feature drones, high-altitude balloons and satellites in a Europe-wide protection system.

‘We can’t only invest in fire trucks, helicopters or planes – we need to train our communities before the fires happen,’ said Kemal Sarp Arsava, who coordinates the project.

Arsava is a senior research scientist at Norway-based RISE Fire Research, which specialises in fire safety.

TREEADS aims to establish a comprehensive fire-management platform covering all three stages of wildfires – before, during and after a blaze breaks out.

Arsava is a native of Turkey who has also worked and studied in the US.

While in the US in late 2019, he was reminded of the international dimension of the wildfires threat by noticing the effect of Australia’s major outbreak of bushfires at the time.

Based then in the state of New Hampshire, Arsava said the blazes caused a slight haze in North America while primarily hurting air quality in South America. 

‘The smoke from all of the wildfires in Australia basically crossed the Pacific Ocean and even changed the colour of the sky in America,’ he said.

Drones and balloons

TREEADS began in December 2021 and is due to run until end-May 2025.

The initiative brings together research institutes and companies from 14 European countries and Taiwan.

Besides Norway and Taiwan, the participants are from Austria, Belgium, Bulgaria, Cyprus, Denmark, France, Germany, Greece, Italy, Lithuania, Romania, Spain and Sweden.

The team of researchers is developing new technologies that’ll be tested in eight countries represented in the project.

One plan is to use drones and high-altitude balloons to detect blazes early, collect data for fire crews and even aid their actions by dropping fire-suppressant materials.

A four-layer approach is foreseen: low-altitude drones to locate fire hotspots; mid-altitude drones to drop fire suppressants; high-altitude balloons to provide a broader view; and satellites for the whole picture.

The trials are due to start early next year.

The project is also testing a virtual-reality headset to train firefighters who aren’t typically assigned to dealing with wildfires. That means teaching city firefighters to deal with blazes in different terrains should the need arise.

In total, more than 26 technologies including for fire protection and suppression will be enhanced, developed and verified in TREEADS.

‘These new technologies will make it easier to fight wildfires in the future,’ said Arsava.

Research in this article was funded by the EU. This article was originally published in Horizon, the EU Research and Innovation Magazine. 

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