Mikael Allan Mikaelsson is a policy fellow at Stockholm Environment Institute. Johan Munck af Rosenschöld, is group manager and senior research scientist at Syke (Finnish Environment Institute).
Europe’s first comprehensive climate risk assessment, published in May, sent a clear and unequivocal message: climate risks facing Europe have reached a critical level and urgently require decisive actions from European policymakers.
Yet the recent EU parliamentary elections – which delivered significant gains for Europe’s far-right and dealt a blow to its green parties – alongside a recently leaked list of EU Council priorities for the next five years, indicate a marked U-turn in the EU’s commitment to climate action.
The EU has faced a dramatically changed geopolitical situation over the past few years, marked by the upsurge of far-right political forces in several member states, growing trade-tensions with China, and a humanitarian disaster and heightened energy security risk caused by Russia’s war in Ukraine.
Against this backdrop, EU policymakers have had to make tough decisions on strengthening security in Europe, diverting their attention to defense, security and migration issues, although this has come at the expense of the EU’s much flagged international climate leadership and green agenda.
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We argue that the EU should stay the course on climate action. Despite geopolitical turns and a backlash from some industries over legislation brought on by the Green Deal, European policymakers have a responsibility to follow through on climate commitments – and thereby avoid the tremendous risks that face us if they do not.
Exacerbating geopolitical risks
Protests have included those by European farmers against sustainability provisions in the EU’s Common Agricultural Policy. Recently, the EU Council only just managed to approve the highly anticipated, but embattled Nature Restoration Law, thanks to a rare display of political defiance by the Austrian environment minister.
The law provides critical policy levers for improving Europe’s much degraded ecosystems, strengthening their resilience towards climate change. Hence this vote was critical, although it may still face a legal challenge.
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There is ample irony in the notion that political efforts and financial resources should be diverted to enhance Europe’s defence and security capabilities and strengthen the EU’s external borders from human migration. Climate change is certain to exacerbate the impacts and risks from geopolitical conflicts and wars and will be the mega-driver of migration over the coming years.
And while legislation that requires businesses to take action on climate change and biodiversity loss is certainly going to be burdensome for some, these costs pale in comparison with the effects that climate change will have on the European economy.
Corporate credit rating downgrades due to companies’ exposure to climate risks have already accelerated, according to S&P Global. And climate-induced disruptions of supply chains are likely to cost the global economy up to $25 trillion over the next 35 years under the current trajectory. Much of this cost will be borne by businesses.
Ways to protect Europe
EU-level policies are currently dangerously inadequate to safeguard European lives and livelihoods from the majority of the potentially catastrophic threats that will loom over Europe in the coming years and decades.
But there are solutions, if bold action is taken in the following areas:
- Protect and restore marine and coastal ecosystems by minimising pressures from overfishing, agricultural runoff and other industrial activities to avoid disastrous degradation of marine ecosystems.
- Conserve and restore Europe’s forests through the recently passed Nature Restoration Law to safeguard Europe’s ecosystems and their many services on which the European economy and wider society heavily depend.
- Leverage the Common Agricultural Policy to strengthen incentives and policy certainty for transforming and adapting Europe’s agricultural sector to extreme heat and drought.
- Shore up the preparedness of healthcare systems and resources against the impacts of heat waves on vulnerable populations and outdoor workers, especially in southern Europe.
- Bolster investments in climate adaptation abroad. This support will also be critical to reduce cascading climate risks that originate beyond Europe’s outer borders.
With this comprehensive body of scientific evidence and advice at hand, European policymakers must resist the urge to adopt a tunnel-vision approach and focus solely on near-term risks, but rather approach climate change as a systemic threat to European’s economy, society and natural capital.
The scientific community already has called on policymakers to reverse the current course of retreat from the EU environmental agenda, in an open letter to the EU’s legislative bodies.
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The actions taken by the incoming group of elected lawmakers and appointed officials will determine the level of harm and damage European citizens will have to endure over the coming decades. It is critical that European policymakers take the long view.
The decisions and actions they take today will lock our children’s future onto a path. Only today’s policymakers can make sure that path takes us towards a world that can sustain a functioning social order and human life.
The post New European Parliament must act on climate change as a systemic threat appeared first on Climate Home News.
New European Parliament must act on climate change as a systemic threat
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Samantha Kemnah looked out the foggy window of her home in New Berlin, New York, at the 150-acre dairy farm she and her husband, Chris, bought last year. This winter, an unprecedented cold front brought snowstorms and ice to the region.
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Drought and heatwaves occurring together – known as “compound” events – have “surged” across the world since the early 2000s, a new study shows.
Compound drought and heat events (CDHEs) can have devastating effects, creating the ideal conditions for intense wildfires, such as Australia’s “Black Summer” of 2019-20 where bushfires burned 24m hectares and killed 33 people.
The research, published in Science Advances, finds that the increase in CDHEs is predominantly being driven by events that start with a heatwave.
The global area affected by such “heatwave-led” compound events has more than doubled between 1980-2001 and 2002-23, the study says.
The rapid increase in these events over the last 23 years cannot be explained solely by global warming, the authors note.
Since the late 1990s, feedbacks between the land and the atmosphere have become stronger, making heatwaves more likely to trigger drought conditions, they explain.
One of the study authors tells Carbon Brief that societies must pay greater attention to compound events, which can “cause severe impacts on ecosystems, agriculture and society”.
Compound events
CDHEs are extreme weather events where drought and heatwave conditions occur simultaneously – or shortly after each other – in the same region.
These events are often triggered by large-scale weather patterns, such as “blocking” highs, which can produce “prolonged” hot and dry conditions, according to the study.
Prof Sang-Wook Yeh is one of the study authors and a professor at the Ewha Womans University in South Korea. He tells Carbon Brief:
“When heatwaves and droughts occur together, the two hazards reinforce each other through land-atmosphere interactions. This amplifies surface heating and soil moisture deficits, making compound events more intense and damaging than single hazards.”
CDHEs can begin with either a heatwave or a drought.
The sequence of these extremes is important, the study says, as they have different drivers and impacts.
For example, in a CDHE where the heatwave was the precursor, increased direct sunshine causes more moisture loss from soils and plants, leading to a drought.
Conversely, in an event where the drought was the precursor, the lack of soil moisture means that less of the sun’s energy goes into evaporation and more goes into warming the Earth’s surface. This produces favourable conditions for heatwaves.
The study shows that the majority of CDHEs globally start out as a drought.
In recent years, there has been increasing focus on these events due to the devastating impact they have on agriculture, ecosystems and public health.
In Russia in the summer of 2010, a compound drought-heatwave event – and the associated wildfires – caused the death of nearly 55,000 people, the study notes.
The record-breaking Pacific north-west “heat dome” in 2021 triggered extreme drought conditions that caused “significant declines” in wheat yields, as well as in barley, canola and fruit production in British Columbia and Alberta, Canada, says the study.
Increasing events
To assess how CDHEs are changing, the researchers use daily reanalysis data to identify droughts and heatwaves events. (Reanalysis data combines past observations with climate models to create a historical climate record.) Then, using an algorithm, they analyse how these events overlap in both time and space.
The study covers the period from 1980 to 2023 and the world’s land surface, excluding polar regions where CDHEs are rare.
The research finds that the area of land affected by CDHEs has “increased substantially” since the early 2000s.
Heatwave-led events have been the main contributor to this increase, the study says, with their spatial extent rising 110% between 1980-2001 and 2002-23, compared to a 59% increase for drought-led events.
The map below shows the global distribution of CDHEs over 1980-2023. The charts show the percentage of the land surface affected by a heatwave-led CDHE (red) or a drought-led CDHE (yellow) in a given year (left) and relative increase in each CDHE type (right).
The study finds that CDHEs have occurred most frequently in northern South America, the southern US, eastern Europe, central Africa and south Asia.
Threshold passed
The authors explain that the increase in heatwave-led CDHEs is related to rising global temperatures, but that this does not tell the whole story.
In the earlier 22-year period of 1980-2001, the study finds that the spatial extent of heatwave-led CDHEs rises by 1.6% per 1C of global temperature rise. For the more-recent period of 2022-23, this increases “nearly eightfold” to 13.1%.
The change suggests that the rapid increase in the heatwave-led CDHEs occurred after the global average temperature “surpasse[d] a certain temperature threshold”, the paper says.
This threshold is an absolute global average temperature of 14.3C, the authors estimate (based on an 11-year average), which the world passed around the year 2000.
Investigating the recent surge in heatwave-leading CDHEs further, the researchers find a “regime shift” in land-atmosphere dynamics “toward a persistently intensified state after the late 1990s”.
In other words, the way that drier soils drive higher surface temperatures, and vice versa, is becoming stronger, resulting in more heatwave-led compound events.
Daily data
The research has some advantages over other previous studies, Yeh says. For instance, the new work uses daily estimations of CDHEs, compared to monthly data used in past research. This is “important for capturing the detailed occurrence” of these events, says Yeh.
He adds that another advantage of their study is that it distinguishes the sequence of droughts and heatwaves, which allows them to “better understand the differences” in the characteristics of CDHEs.
Dr Meryem Tanarhte is a climate scientist at the University Hassan II in Morocco, and Dr Ruth Cerezo Mota is a climatologist and a researcher at the National Autonomous University of Mexico. Both scientists, who were not involved in the study, agree that the daily estimations give a clearer picture of how CDHEs are changing.
Cerezo-Mota adds that another major contribution of the study is its global focus. She tells Carbon Brief that in some regions, such as Mexico and Africa, there is a lack of studies on CDHEs:
“Not because the events do not occur, but perhaps because [these regions] do not have all the data or the expertise to do so.”
However, she notes that the reanalysis data used by the study does have limitations with how it represents rainfall in some parts of the world.
Compound impacts
The study notes that if CDHEs continue to intensify – particularly events where heatwaves are the precursors – they could drive declining crop productivity, increased wildfire frequency and severe public health crises.
These impacts could be “much more rapid and severe as global warming continues”, Yeh tells Carbon Brief.
Tanarhte notes that these events can be forecasted up to 10 days ahead in many regions. Furthermore, she says, the strongest impacts can be prevented “through preparedness and adaptation”, including through “water management for agriculture, heatwave mitigation measures and wildfire mitigation”.
The study recommends reassessing current risk management strategies for these compound events. It also suggests incorporating the sequences of drought and heatwaves into compound event analysis frameworks “to enhance climate risk management”.
Cerezo-Mota says that it is clear that the world needs to be prepared for the increased occurrence of these events. She tells Carbon Brief:
“These [risk assessments and strategies] need to be carried out at the local level to understand the complexities of each region.”
The post Heatwaves driving recent ‘surge’ in compound drought and heat extremes appeared first on Carbon Brief.
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