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Climate Change Is Slowing Earth’s Rotation

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Wednesday, July 17, 2024

Climate change is causing Greenland and Antarctic ice to melt, shifting water to the equatorial regions and affecting Earth’s rotation, which lengthens days by a few milliseconds. Supported by NASA, ETH Zurich researchers showed that this impact could surpass the moon’s influence on Earth’s rotational speed and is also shifting the Earth’s axis of rotation.Melting polar ice due to climate change is redistributing Earth’s mass, slowing its rotation and slightly extending the day, as highlighted by ETH Zurich’s studies supported by NASA. This indicates a greater human influence on Earth’s rotational dynamics than previously recognized.Climate change is leading to the melting of ice in Greenland and Antarctica. As a result, water from these polar areas is flowing into the world’s oceans –and especially into the equatorial region. “This means that a shift in mass is taking place, and this is affecting the Earth’s rotation,” explains Benedikt Soja, Professor of Space Geodesy at the Department of Civil, Environmental and Geomatic Engineering at ETH Zurich.“It’s like when a figure skater does a pirouette, first holding her arms close to her body and then stretching them out,” Soja says. The initially fast rotation becomes slower because the masses move away from the axis of rotation, increasing physical inertia. In physics, we speak of the law of conservation of angular momentum, and this same law also governs the Earth’s rotation. If the Earth turns more slowly, the days get longer. Climate change is therefore also altering the length of the day on Earth, albeit only minimally. Supported by the US space agency NASA, the ETH researchers from Soja’s group have published two new studies in the journals Nature Geoscience and Proceedings of the National Academy of Sciences (PNAS) on how climate change affects the polar motion and the length of the day.Climate change surpasses the moon’s influenceIn the PNAS study, the ETH Zurich researchers show that climate change is also increasing the length of the day by a few milliseconds from its current 86,400 seconds. This is because water is flowing from the poles to lower latitudes thus slowing down the speed of rotation.Another cause of this slowdown is tidal friction, which is triggered by the moon. However, the new study comes to a surprising conclusion: if humans continue to emit more greenhouse gases and the Earth warms up accordingly, this would ultimately have a greater influence on the Earth’s rotational speed than the effect of the moon, which has determined the increase in the length of the day for billions of years. “We humans have a greater impact on our planet than we realize,” Soja concludes, “and this naturally places great responsibility on us for the future of our planet.”The Earth’s axis of rotation is shiftingHowever, shifts in mass on the Earth’s surface and in its interior caused by the melting ice not only change the Earth’s rotational speed and the length of day: as the researchers show in Nature Geoscience, they also alter the axis of rotation. This means that the points where the axis of rotation actually meets the Earth’s surface move. Researchers can observe this polar motion, which, over a longer timeframe, comes to some ten meters per hundred years. It’s not only the melting of the ice sheets that plays a role here, but also movements taking place in the Earth’s interior. Deep in the Earth’s mantle, where the rock becomes viscous due to high pressure, displacements occur over long periods of time. And there are also heat flows in the liquid metal of Earth’s outer core, which are responsible for both generating the Earth’s magnetic field and leading to shifts in mass.In the most comprehensive modeling to date, Soja and his team have now shown how polar motion results from the individual processes in the core, in the mantle and from the climate at the surface. Their study was recently published in the journal Nature Geoscience. “For the first time, we present a complete explanation for the causes of long-period polar motion,” says Mostafa Kiani Shahvandi, one of Soja’s doctoral students and lead author of the study. “In other words, we now know why and how the Earth’s axis of rotation moves relative to the Earth’s crust.”One finding in particular stands out in their study in Nature Geoscience: that the processes on and in the Earth are interconnected and influence each other. “Climate change is causing the Earth’s axis of rotation to move, and it appears that the feedback from the conservation of angular momentum is also changing the dynamics of the Earth’s core,” Soja explains. Kiani Shahvandi adds: “Ongoing climate change could therefore even be affecting processes deep inside the Earth and have a greater reach than previously assumed.” However, there is little cause for concern, as these effects are minor and it’s unlikely that they pose a risk.Physical laws combined with artificial intelligenceFor their study on polar motion, the researchers used what are known as physics-informed neural networks. These are novel artificial intelligence (AI) methods in which researchers apply the laws and principles of physics to develop particularly powerful and reliable algorithms for machine learning. Kiani Shahvandi received support from Siddhartha Mishra, Professor of Mathematics at ETH Zurich, who in 2023 received ETH Zurich’s Rössler Prize, the university’s most highly endowed research award, and who is a specialist in this field.The algorithms that Kiani Shahvandi developed have made it possible for the first time to record all the different effects on the Earth’s surface, in its mantle, and in its core, and to model their possible interactions. The result of the calculations shows how the Earth’s rotational poles have moved since 1900. These model values are in excellent agreement with the real data provided by astronomical observations in the past and by satellites over the last thirty years, which means they also enable forecasts for the future.Important for space travel“Even if the Earth’s rotation is changing only slowly, this effect has to be taken into account when navigating in space – for example, when sending a space probe to land on another planet,” Soja says. Even a slight deviation of just one centimeter on Earth can grow to a deviation of hundreds of meters over the huge distances involved. “Otherwise, it won’t be possible to land in a specific crater on Mars,” he says.References:“The increasingly dominant role of climate change on length of day variations” by Mostafa Kiani Shahvandi, Surendra Adhikari, Mathieu Dumberry, Siddhartha Mishra and Benedikt Soja, 15 July 2024, Proceedings of the National Academy of Sciences.DOI: 10.1073/pnas.2406930121“Contributions of core, mantle and climatological processes to Earth’s polar motion” by Mostafa Kiani Shahvandi, Surendra Adhikari, Mathieu Dumberry, Sadegh Modiri, Robert Heinkelmann, Harald Schuh, Siddhartha Mishra and Benedikt Soja, 12 July 2024, Nature Geoscience.DOI: 10.1038/s41561-024-01478-2

Melting polar ice due to climate change is redistributing Earth’s mass, slowing its rotation and slightly extending the day, as highlighted by ETH Zurich’s studies...

Earth From Space at Night

Climate change is causing Greenland and Antarctic ice to melt, shifting water to the equatorial regions and affecting Earth’s rotation, which lengthens days by a few milliseconds. Supported by NASA, ETH Zurich researchers showed that this impact could surpass the moon’s influence on Earth’s rotational speed and is also shifting the Earth’s axis of rotation.

Melting polar ice due to climate change is redistributing Earth’s mass, slowing its rotation and slightly extending the day, as highlighted by ETH Zurich’s studies supported by NASA. This indicates a greater human influence on Earth’s rotational dynamics than previously recognized.

Climate change is leading to the melting of ice in Greenland and Antarctica. As a result, water from these polar areas is flowing into the world’s oceans –and especially into the equatorial region. “This means that a shift in mass is taking place, and this is affecting the Earth’s rotation,” explains Benedikt Soja, Professor of Space Geodesy at the Department of Civil, Environmental and Geomatic Engineering at ETH Zurich.

“It’s like when a figure skater does a pirouette, first holding her arms close to her body and then stretching them out,” Soja says. The initially fast rotation becomes slower because the masses move away from the axis of rotation, increasing physical inertia. In physics, we speak of the law of conservation of angular momentum, and this same law also governs the Earth’s rotation. If the Earth turns more slowly, the days get longer. Climate change is therefore also altering the length of the day on Earth, albeit only minimally.

Supported by the US space agency NASA, the ETH researchers from Soja’s group have published two new studies in the journals Nature Geoscience and Proceedings of the National Academy of Sciences (PNAS) on how climate change affects the polar motion and the length of the day.

Climate change surpasses the moon’s influence

In the PNAS study, the ETH Zurich researchers show that climate change is also increasing the length of the day by a few milliseconds from its current 86,400 seconds. This is because water is flowing from the poles to lower latitudes thus slowing down the speed of rotation.

Another cause of this slowdown is tidal friction, which is triggered by the moon. However, the new study comes to a surprising conclusion: if humans continue to emit more greenhouse gases and the Earth warms up accordingly, this would ultimately have a greater influence on the Earth’s rotational speed than the effect of the moon, which has determined the increase in the length of the day for billions of years. “We humans have a greater impact on our planet than we realize,” Soja concludes, “and this naturally places great responsibility on us for the future of our planet.”

The Earth’s axis of rotation is shifting

However, shifts in mass on the Earth’s surface and in its interior caused by the melting ice not only change the Earth’s rotational speed and the length of day: as the researchers show in Nature Geoscience, they also alter the axis of rotation. This means that the points where the axis of rotation actually meets the Earth’s surface move. Researchers can observe this polar motion, which, over a longer timeframe, comes to some ten meters per hundred years. It’s not only the melting of the ice sheets that plays a role here, but also movements taking place in the Earth’s interior. Deep in the Earth’s mantle, where the rock becomes viscous due to high pressure, displacements occur over long periods of time. And there are also heat flows in the liquid metal of Earth’s outer core, which are responsible for both generating the Earth’s magnetic field and leading to shifts in mass.

In the most comprehensive modeling to date, Soja and his team have now shown how polar motion results from the individual processes in the core, in the mantle and from the climate at the surface. Their study was recently published in the journal Nature Geoscience. “For the first time, we present a complete explanation for the causes of long-period polar motion,” says Mostafa Kiani Shahvandi, one of Soja’s doctoral students and lead author of the study. “In other words, we now know why and how the Earth’s axis of rotation moves relative to the Earth’s crust.”

One finding in particular stands out in their study in Nature Geoscience: that the processes on and in the Earth are interconnected and influence each other. “Climate change is causing the Earth’s axis of rotation to move, and it appears that the feedback from the conservation of angular momentum is also changing the dynamics of the Earth’s core,” Soja explains. Kiani Shahvandi adds: “Ongoing climate change could therefore even be affecting processes deep inside the Earth and have a greater reach than previously assumed.” However, there is little cause for concern, as these effects are minor and it’s unlikely that they pose a risk.

Physical laws combined with artificial intelligence

For their study on polar motion, the researchers used what are known as physics-informed neural networks. These are novel artificial intelligence (AI) methods in which researchers apply the laws and principles of physics to develop particularly powerful and reliable algorithms for machine learning. Kiani Shahvandi received support from Siddhartha Mishra, Professor of Mathematics at ETH Zurich, who in 2023 received ETH Zurich’s Rössler Prize, the university’s most highly endowed research award, and who is a specialist in this field.

The algorithms that Kiani Shahvandi developed have made it possible for the first time to record all the different effects on the Earth’s surface, in its mantle, and in its core, and to model their possible interactions. The result of the calculations shows how the Earth’s rotational poles have moved since 1900. These model values are in excellent agreement with the real data provided by astronomical observations in the past and by satellites over the last thirty years, which means they also enable forecasts for the future.

Important for space travel

“Even if the Earth’s rotation is changing only slowly, this effect has to be taken into account when navigating in space – for example, when sending a space probe to land on another planet,” Soja says. Even a slight deviation of just one centimeter on Earth can grow to a deviation of hundreds of meters over the huge distances involved. “Otherwise, it won’t be possible to land in a specific crater on Mars,” he says.

References:

“The increasingly dominant role of climate change on length of day variations” by Mostafa Kiani Shahvandi, Surendra Adhikari, Mathieu Dumberry, Siddhartha Mishra and Benedikt Soja, 15 July 2024, Proceedings of the National Academy of Sciences.
DOI: 10.1073/pnas.2406930121

“Contributions of core, mantle and climatological processes to Earth’s polar motion” by Mostafa Kiani Shahvandi, Surendra Adhikari, Mathieu Dumberry, Sadegh Modiri, Robert Heinkelmann, Harald Schuh, Siddhartha Mishra and Benedikt Soja, 12 July 2024, Nature Geoscience.
DOI: 10.1038/s41561-024-01478-2

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Hampshire have been accused of taking part in a “sportswashing vehicle” before their participation in this month’s Global Super League in Guyana, a T20 tournament sponsored by oil giant ExxonMobil.Hampshire’s participation in the GSL comes despite their venue’s public commitment to playing a leading global role in environmental sustainability. The Utilita Bowl celebrated switching on more than 1,000 solar panels before a T20 between England and Australia in September. David Mann, chief executive of the Utilita Bowl, used the initiative to highlight “our commitment to being the greenest international cricket venue”.The new five-team GSL tournament runs from 26 November to 6 December and, alongside Australian state team Victoria, features franchise sides Guyana Amazon Warriors, Lahore Qalandars and Rangpur Riders.ExxonMobil Guyana is its title sponsor, with the tournament website stating the event “has the full support of the Government of Guyana … the government sees the GSL as a key driver for tourism and economic growth”. ExxonMobil found oil in the country in 2015 and, this month, celebrated the production of 500m barrels from the Stabroek block.Etienne Stott, an Olympic gold medallist in 2012 who now campaigns for Extinction Rebellion, told the Guardian: “I’m really sad and angry that yet another sport is being corrupted by the oily money of the fossil fuel industry.”Stott said it was “perverse” for ExxonMobil to sponsor “a supposedly global cricket tournament in a country which is very much at risk from the effects of global heating.“I cannot understand why Hampshire [County] Cricket Club would risk reputational damage by associating itself with such an obvious sportswashing vehicle, especially given their public commitments to be more sustainable,” said Stott. “I hope cricket fans will demand that this tournament ditches its filthy sponsor.”Hampshire have declined to comment.Joe Cooke, an environmental campaigner and ex-professional cricketer for Glamorgan, said: “It’s disheartening to see cricket being sponsored and influenced by companies with such a direct link to the climate crisis. As a sport we are deeply at mercy to the environment with extreme weather events that have been made more likely by a changing climate, impacting the game at all levels. Cricket could be in a unique position to set a positive example by distancing itself from these kinds of partnerships.”ExxonMobil also sponsors the Amazon Warriors, who play in the Caribbean Premier League, and its involvement in cricket highlights the significant relationship between fossil fuel firms and the sport. In May the International Cricket Council announced a four-year extension to its partnership with Aramco, the Saudi Arabian oil company.skip past newsletter promotionSubscribe to our cricket newsletter for our writers' thoughts on the biggest stories and a review of the week’s actionPrivacy Notice: Newsletters may contain info about charities, online ads, and content funded by outside parties. For more information see our Privacy Policy. We use Google reCaptcha to protect our website and the Google Privacy Policy and Terms of Service apply.after newsletter promotionChris Britt-Searle of The Next Test, a group aiming to raise awareness of the climate crisis’s impact on cricket, said: “It’s very easy to condemn individual teams, countries and competitions. But the truth is, the whole of cricket is awash with fossil fuel money.”Britt-Searle added that the tournament could be an “opportunity” for cricketers to discuss the involvement of fossil fuels in cricket, noting the recent letter signed by more than 100 female professional footballers urging Fifa to end its partnership with Aramco.“I would say to all cricketers, all cricket fans, clubs, cricket organisations, you have an opportunity to talk about this,” said Britt-Searle. “There’s a great opportunity here to put your hand up and say, look, we’re not OK with this.”

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Starmer condemns Badenoch for abandoning cross-party consensus on climate crisis policy – UK politics live

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The climate crisis is a big problem. Marine biologist Ayana Elizabeth Johnson is dreaming of even bigger solutions.

Here’s an exercise for you: Imagine the trajectory of our current climate crisis.  You probably don’t need to imagine very hard what this future looks like because we’re seeing it play out in the present: towns torn apart by massive hurricanes, thousands displaced by wildfires, lives taken by extreme heat. All of it is enough […]

Here’s an exercise for you: Imagine the trajectory of our current climate crisis.  You probably don’t need to imagine very hard what this future looks like because we’re seeing it play out in the present: towns torn apart by massive hurricanes, thousands displaced by wildfires, lives taken by extreme heat. All of it is enough to make a person freeze with fear. But there is a flip side to this terror.  Such an all-consuming problem inherently requires innovative solutions and adaptations of epic proportions. So here’s another exercise: Close your eyes and think, what could a world that hasn’t just taken the climate crisis seriously but also risen to the challenge look like? Envisioning a better future in the face of serious climate threats might seem like lofty daydreaming, especially when we take into consideration our world leaders’ inaction. But Ayana Elizabeth Johnson, a marine biologist and climate policy wonk, has spent much of her career dreaming and coming up with climate solutions — and she knows that nihilism and avoidance won’t get us anywhere. In her recently published book, What If We Get It Right?: Visions of Climate Futures, Johnson tackles how we can transform our ways of being, thinking, and doing to stop the worst of climate change. She expertly intertwines her conversations with scientists, artists, and activists to create a practical and accessible guidebook for a more just future brimming with possibilities — a salve for even the most environmentally anxious.  “Peril and possibility coexist,” she writes in the book. Of course, she’s well aware of just how big of an environmental mess our world is in, but you won’t catch her dwelling on the worst-case scenarios for long. “We’re pretty fucked,” Johnson said in her September interview on Vox’s The Gray Area, “but there’s a lot we could do to have a better possible future.”  Johnson is particularly adept at speaking to those who know the climate crisis is real but have the instinct to bury their head in the sand at the thought of such a massive existential crisis. Though she is frank about the state of our world’s environmental health, she speaks and writes with an energizing clarity — whether it’s conversing with climate advocates for her book tour or breaking down big environmental questions as a co-host of the podcast How to Save a Planet. It’s Johnson’s understanding of our instinct to flee the climate problems that has made it essential for her to explore the possibilities to address it and take action that goes beyond protesting or voting. These are important measures, Johnson believes, but also broad ones that aren’t necessarily fine-tuned to our individual experiences, skills, and interests.  For Johnson, a Brooklyn native who calls the ocean her love before it became her career, that looked like co-founding Urban Ocean Lab (UOL) in 2018. The nonprofit think tank specializes in researching coastal cities in the United States — places that one in five Americans call home and are often vulnerable to some of the worst environmental disasters — and developing equitable, pragmatic policy recommendations for these regions.  One such recommendation is UOL’s climate readiness framework for coastal cities. It’s a comprehensive collection of over 70 actions that coastal communities can apply to better adapt to current and future climate risks, such as working with community-based organizations to strengthen disaster preparedness plans and developing home relocation programs for low-income residents and people of color living in climate-vulnerable places.  The Caribbean region in particular has a special place in Johnson’s heart — her late father hailed from Jamaica, whose waters have suffered from pollution and overfishing. “To me, ocean conservation is in part about cultural preservation,” she writes after reflecting on her father’s life between Jamaica and New York City. “We are losing something more fundamental than a meal: a way of life.” It makes sense that Johnson has also worked to improve the waters surrounding these islands. Prior to founding UOL, she led an ocean management policy project called the Blue Halo Initiative at the Waitt Institute, where she served as executive director. Starting in Barbuda in 2013, Johnson focused on engaging with the community, interviewing hundreds of fishers and residents to develop policy recommendations for better preserving the waters and the species within it. Just a year later, the Barbuda Council signed into law a set of ocean zoning policies to protect underwater ecosystems and ensure sustainable fishing. These efforts were soon replicated in Montserrat and Curaçao. Johnson’s reverence for the ocean and the career she’s made out of it has made its way into the American political sphere, too. Back in 2019, the Green New Deal, a set of proposed progressive climate policies, was supported by left-leaning candidates up and down the ballot. Johnson had just one issue with it: It left out our seas almost entirely. “I was feeling bummed about the ocean getting short shrift in the Green New Deal Resolution — just a single, vague reference to the ocean,” Johnson wrote in What If We Get It Right? That summer, Johnson co-authored an op-ed in Grist about this big blue gap and what solutions to fill it with. Within that year, Johnson was contacted by Sen. Elizabeth Warren’s 2020 presidential campaign to help write what would become the Blue New Deal, an official policy platform for the Warren campaign. It was an extensive list of actions, like expanding marine protected areas, building climate-smart ports, and holding Big Agriculture accountable for water pollution. When Johnson later met Sen. Warren, she wrote in What If We Get It Right? that “[Senator Warren] told me it was the plan that got the most excited mentions in her selfie lines.” And while Joe Biden won the Democratic nomination and the election, his administration became the first to put out a federal Ocean Climate Action plan — which included similar elements to the Blue New Deal — after dozens of businesses and organizations (including UOL) pushed the White House to do so. There are a lot of studies that show engaging with nature helps our physical and mental well-being, so it’s not surprising that conserving our environment is important for many people. One word that Johnson often uses and embodies is “biophilia”: a love for nature and life, and in her words, “a powerful driving force for conservation.” With this in mind, I have one more exercise for you: Think of moments you’ve felt biophilia. Maybe you once walked through a lush forest, swam in a pristine lake, or witnessed snow-capped mountains up close. Perhaps you’ve encountered one of the millions of amazing creatures that inhabit these ecosystems. But how can one hold onto this sense of biophilia if much of our ways of life are destroying the very essence of it?  It’s all the more reason not to let our worries immobilize us and instead try to get it right, just as Johnson has done. Her wide-ranging expertise on climate policy; deeply empathetic and inclusive lens for climate solutions; and her unwavering, contagious biophilia has made her a bold visionary to follow in the climate space.  How apt that a lover of the ocean is making waves. —Sam Delgado

Climate
Crisis
Agriculture

Denmark is tiny. Its ambition to make its food system more climate-friendly is huge.

Climate scientists agree on at least one necessary change to our food system: People, especially those in rich countries, ought to be eating more plants and fewer animals.  Globally, livestock production accounts for some 15 to 20 percent of greenhouse gas emissions and accelerates a host of other environmental problems, from deforestation to freshwater depletion […]

Climate scientists agree on at least one necessary change to our food system: People, especially those in rich countries, ought to be eating more plants and fewer animals.  Globally, livestock production accounts for some 15 to 20 percent of greenhouse gas emissions and accelerates a host of other environmental problems, from deforestation to freshwater depletion to air pollution. And yet virtually all Western governments have designed their food policy to churn out more and more meat, milk, and eggs.  The idea that we need to eat more, not less, meat is also baked into many nations’ cultural psyches, with both subtle and overt messages that meat equals masculinity and prosperity. Meat has been dragged into many countries’ culture wars, stifling civil discussions over how to make food systems sustainable. One country, though, far more than any other, has heeded the climate scientists’ advice: Denmark, the small Scandinavian nation of 6 million people known for its intensive factory farming system and resulting pork and dairy exports. In 2021, the Danish Parliament and government made a deal to shift its food system in a more plant-based and organic direction, and has set aside around $200 million US to do it. About $85 million is going to farmers who grow plant-based foods. The rest is being used to fund new projects, like experimenting with “nudge theory” — redesigning cafeterias to subtly encourage consumers to choose more plant-based options — and launching a startup incubator for plant-based companies at the Technological Institute of Denmark.  Many people have labored to turn these ideas into policy, but Rune-Christoffer Dragsdahl, the secretary-general of the Vegetarian Society of Denmark, has unquestionably been the leader. Dragsdahl became the society’s first employee in 2016, when he went unpaid for the first year or so. Since then, the organization has grown to employ 22 staff members.  How exactly did a tiny organization with little political clout blaze a trail toward a more sustainable, humane food system? I spoke with Dragsdahl last month to find out. His secret, it turns out, is diplomacy.  Dragsdahl and his vegetarian society colleagues spent years building a coalition of farmers, scientists, and organic food advocates, emphasizing shared values — sustainability and food innovation — instead of differences, like the merits of vegetarianism. This big-tent approach appealed to politicians, including not just members of left-wing parties but also politicians on the right, one of whom called the country’s plant-based action plan an “intelligent idea,” according to Dragsdahl.    “That, I think, shows the fact that we and other stakeholders have somehow managed to mainstream this,” he told me. “There are still ideological battles and clearly we’re not done, but we have to a large extent managed to get many people to see that this should also be a part of Danish agriculture and that it should be stronger. That there’s actual potential in this. That there’s no need to fight over more plants.” My conversation with Dragsdahl has been edited for length and clarity. What role does meat play in Danish society? It’s really a centerpiece of food culture, of Danish culture. There are many social events, whether it’s football events — people will have their hot dogs — and when they’re grilling in the summer.  Apart from food culture … Denmark is a very agricultural nation. We are the most cultivated country in the world, together with Bangladesh, in terms of the [percentage of the] surface of the land being cultivated, because the country is very flat, so you can say it’s suitable for this.  Even though the country might be suitable, you can over-cultivate it. And that is the problem — we have severe biodiversity loss here, severe eutrophication. … So it’s definitely damaging the local environment here. But for many decades, it has been difficult to do anything about it because at least some people have felt we are an agricultural nation. It’s in our blood, that’s who we are. And livestock is an integral part of that.  So there are things here, both culturally but also politically. And there’s this universal pride for people — that Danish dairy, Danish butter, is being exported to the whole world… But also, of course, bacon and pork products. But that has been increasingly questioned in the last 10 years.  What happened to lay the groundwork for the plant-based action plan? In 2019, we got the idea to start something we call the Danish Network for Plant Proteins. You make such a network, really, to make people feel welcome no matter where they’re from. … We had hard-hitting scientists, we had inspiring startups, we had interesting content — but always in a friendly and warm and pragmatic tone. And that meant that even the farming association [the Danish Agriculture and Food Council] attended. They later came back to us a month later and told us that they liked our approach. We don’t agree about scaling down livestock production, but they did agree that we could work together on how to look more into plant-based [food production] to diversify Danish agriculture.  When they did that, it almost immediately eliminated any opposition from a large part of the political spectrum. So maybe some of the resistance in the right wing became neutral, and some of the hesitance among the parties in the center of Danish politics became slightly positive. And that was extremely helpful because you move the entire playing field. And then, of course, the parties which are even more progressive on the center and center-left wing, they can push even harder for it and get the middle parties on board without the right wing making a big fuss about it. And the farmers’ association was definitely important for that. I think we have really successfully been insisting that plant-based is both the whole foods plant-based and the processed [foods] and everything in between. And by insisting on that, we’re getting less opposition between the people who just want everything to be home-cooked and believe children should be taught how to cook their own vegetables again. These solutions are both needed, and there [are] also places in between. There might be processed products that imitate meat but that are processed in milder ways. I think many of the Danish startups in this space are actually trying to find these kinds of solutions. So that has been a way to get many different kinds of people on board.  What kind of plant-based projects have been awarded funding?  So far, around 35 projects have been granted [in each of two rounds].  In the first round, the Hospitality School of Copenhagen got funding for a vegetarian chef’s degree. They got the funding for developing a curriculum that the government could then approve as acceptable for a new chef’s degree — which does not have any meat — and that degree becomes part of the government system, so it becomes a formal government education. But they could not have done it without getting funding to develop the curriculum. In the second round, some [agricultural] schools applied for funding for developing a curriculum on legumes, but also to teach the professionals in the kitchens at the farmer schools how to include more legumes in the foods eaten by the young farmers. What else should people know about Denmark’s efforts to build a more plant-based food system? Denmark is not paradise. [People] will have this excuse — they’ll say, “This is just Denmark, Denmark is always ahead on everything.” But that’s not the full story. And I think that’s the important part to be told here. This happened in the country with the largest livestock production per capita and with a very powerful livestock lobbying sector. So when we can succeed on that in Denmark, there will be pathways to that in other countries. And for me, that is a really important message that we should not give up — that there is actually hope.

Climate
Food
Forests

“Absolutely devastating”: Climate change is pushing coral reefs to extinction, experts warn

Coral reefs have experienced four mass bleaching event in 18 months, with no sign of stopping

The Chagos Archipelago is one of the most remote places on Earth. Smack dab in the middle of the Indian Ocean, the collection of more than five dozen tiny islands are mostly uninhabited, due in no small part to the United States and United Kingdom expelling the Indigenous Chagossians in an ethnic cleansing from 1967 to 1973. For decades only a single atoll, Diego Garcia, has had any inhabitants. Yet as coral reef ecologist Alexandra Dempsey explored the atolls’ beautiful coral reefs in 2015, she nevertheless found signs of human pollution. “While we were there, we witnessed the very first stages of a bleaching event,” Dempsey said, referring to when coral becomes dead and white due to stress. Dempsey recalled "the scale at which these 100-year-old corals were just stressed. They were paling. The cotton candy colors paling is definitely an indicator of an ecosystem that is extremely stressed.”  Even the supposed “crown jewel of the reefs” looked bleached because of temperatures upwards of 80 and 90 degrees Fahrenheit. As CEO of the Khaled bin Sultan Living Oceans Foundation, Dempsey often thinks about how to protect coral reefs from human activity, yet is now presented with evidence that even the most remote locations cannot be entirely protected. One big reason? Few things, if anything, will be unaffected by global heating. “No matter how much protection and how much due diligence goes behind trying to keep humans and people away from the reefs, the effects of climate change are just absolutely devastating to these ecosystems,” Dempsey said. Bleached Corals, Cenderawasih Bay, West Papua, Indonesia (Reinhard Dirscherl/ullstein bild via Getty Images)Similarly, if coral reefs go extinct, it won’t just be the diversity of the ocean that will suffer — many people will too. Approximately 3.3 billion people rely on aquatic foods for nutrition, which accounts for almost 20% of the average per capita consumption of animal protein. If the reefs collapse, so will some bigger fish stocks, like tuna and groupers. Marine fisheries ecologist Khatija Alliji, from the Centre for Environment, Fisheries and Aquaculture Science, has personally seen humans tampering with coral reefs while exploring them, and from that observation points out that it is not merely our greenhouse gas emissions that harm coral reefs and underwater ecosystems. "We are clearly challenging coral’s natural capacity for adaptation." “Currently coral reefs face many threats, including (but not limited to) biodiversity loss, water quality, climate change, disease, predation, coastal development, litter, marine traffic and pollution,” Alliji explained. Because reefs are so complex, scientists still do not fully understand all the interlocking parts that make them work. Even the recent Red List assessment that found over two-fifths of coral reef species threatened with extinction added there are some species where data is so deficient that a risk category cannot be assigned. “Advancements in coral taxonomy using DNA has led to the discovery of new species of coral and better taxonomic definition,” Alliji said. “But there is still lots to investigate and this is both exciting and terrifying given the many threats listed above.” For all of the mysteries that remain about coral reefs, though, experts agree that climate change is an undisputed threat. Indeed, our planet is already in the middle of its fourth global coral bleaching event in 18 months largely due to climate change, which experts predict will worsen as we surpass 1.5º C of global temperature rise. Want more health and science stories in your inbox? Subscribe to Salon's weekly newsletter Lab Notes. “Locally, some reef regions surpassed 1.5º C in the last year, but it takes a global average over 20 years to calculate the threshold; it is highly likely temperature levels will exceed even 2º C globally before a turning point is reached,” David Obura, chair of the Intergovernmental Platform on Biodiversity and Ecosystem Services, told Salon. “Scientists recently shifted the estimated critical range for corals from 1.5º to 2º C warming to [between] 1º and 1.5º C warming. And as with many things with climate change and the Anthropocene, severe and compounding impacts are being observed earlier than predicted.” "The ocean has no boundaries and therefore a collaborative approach is required to ensure coral survival and guarantee their future." Aldo Croquer, a marine conservation program manager for the Central Caribbean in Nature Conservancy, said that coral reefs have weathered many cataclysmic events in Earth’s history, but they may not survive humanity. “Corals have evolved facing great challenges and they have managed to survive, even to massive global extinctions,” Croquer said. “Their capacity to adapt to environmental change and to come back from disturbances is indisputable, at least at evolutionary time scales. However, the changes that we are seeing today occurred at the scales of decades. This is unprecedented. Thus, we are clearly challenging coral’s natural capacity for adaptation.” To protect coral reefs from rising temperatures and other human activity, it is critical for local communities to work together with global authorities so they can salvage what they can. “Climate change is a global issue and will need both local and global management and solutions to ensure we protect our natural ecosystems and resources,” Alliji said. “The ocean has no boundaries and therefore a collaborative approach is required to ensure coral survival and guarantee their future.” Obura added, “There is a localized commitment to enabling the sorts of changes that can reduce local pressures, which revolve around promoting circular economies, less destructive economic and development practices. To some extent the problem is these are pitched as ‘local’ problems for local authorities to act on, but often the broader national and international contexts don’t facilitate this by continually incentivising more growth, more resorts, more fishing, more goods and services, etc.” Yet even if all of those changes are made, scientists like Jason Spadaro from the Coral Reef Restoration Research Program in Florida's Mote Marine Laboratory still expect more depressing journeys like one he recently took to the Florida Keys. “When I started my career back in 2006 or so, coral reefs in the Florida Keys in particular had about maybe a little better than 10% of their surface covered in live coral,” Spadaro said. “Today we've got somewhere less than 2%, as well as a fourfold decrease in the living tissue color cover of our coral reefs in the Keys. That's due almost entirely to things like climate change.” Read more about our oceans

Climate
Extinction
Conservation

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