Climate change

Shortly after the opening ceremony of the 2023 United Nations climate negotiations in Dubai, delegates of nations around the world rose in a standing ovation to celebrate a long-awaited agreement to launch a loss and damage fund to help vulnerable countries recover from climate-related disasters. But the applause might not yet be warranted. The deal itself leaves much undecided and has been met with criticism by climate justice advocates and front-line communities. I teach global environmental politics and climate justice and have been attending and observing these negotiations for over a decade to follow the demands for just climate solutions, including loss and damage compensation for countries that have done the least to cause climate change. COP28 President Sultan Ahmed al-Jaber, center, walks with world leaders and representatives of countries to the climate summit’s opening ceremony. The loss and damage fund was one of the fi...

Nine years ago, I stood on the muddy banks of the Great Marsh, a salt marsh an hour north of Boston, and pulled a thumb-sized crab with an absurdly large claw out of a burrow. I was looking at a fiddler crab – a species that wasn’t supposed to be north of Cape Cod, let alone north of Boston. As it turned out, the marsh I was standing in would never be the same. I was witnessing climate change in action. The Great Marsh is on the Gulf of Maine, the piece of the Atlantic that extends approximately from Cape Cod, Massachusetts, to Nova Scotia, Canada. The marshes along the gulf are critical breeding sites for many bird species. But the water there is warming faster than almost anywhere else on the planet. And with warming water comes warm-water species. Marsh grass is essential for both habitat and adapting to sea-level rise in the Great Marsh. David S. Johnson Maryland blue crab and black...

The year 2023 shattered the record for the warmest summer in the Arctic, and people and ecosystems across the region felt the impact. Wildfires forced evacuations across Canada. Greenland was so warm that a research station at the ice sheet summit recorded melting in late June, only its fifth melting event on record. Sea surface temperatures in the Barents, Kara, Laptev and Beaufort seas were 9 to 12 degrees Fahrenheit (5 to 7 degrees Celsius) above normal in August. While reliable instrument measurements go back only to around 1900, it’s almost certain this was the Arctic’s hottest summer in centuries. Summer heat extremes in 2023 and over time. NOAA, Arctic Report Card 2023 The year started out unusually wet, and snow accumulation during the winter of 2022-23 was above average across much the Arctic. But by May, high spring temperatures had left the North American snowpack at a recor...

A research project based at Heidelberg University and Heidelberg University Hospital targets plastic particles and climate change as driving factors for the spread of antimicrobial resistance (AMR) in the environment. The participating researchers will investigate socio-ecological interactions within aquatic habitats affected by plastic pollution, contamination with antibiotics and climatic influences, and explore environmental and health-related impacts in the context of Planetary Health. The project is led by Prof. Dr Joacim Rocklöv, Humboldt Professor at the Interdisciplinary Center for Scientific Computing and the Heidelberg Institute of Global Health, and comprises eleven international partners, including the Research Institute for Tropical Medicine in the Philippine Department of Health. The European Union is funding the four and a half-year international collaboration project with more than six million euros. “Scientific research is needed to show...

Esnart Chongani boils five small pumpkins over firewood outside her home in Makoka, a village in Zambia’s Chongwe District, not far from the capital, Lusaka. She tests to make sure they’re tender, drains the water, which she will save for later, and then carefully divides them into 12 portions as her family sits down for lunch. It’s a healthy dish, but there’s scarcely enough to go around, and this is the only meal any of them will eat today. Chongani, 76, isn’t used to rationing. She’s the proud owner of a seven-acre farm that she has worked on for decades. Ordinarily, her family harvests more than two tons of maize in April. But this year, southern Africa was hit by its worst mid-season dry spell in over a century, and for the first time in her life, they have harvested nothing. “I cannot remember anything like this,” says Chongani. “People are so hungry they are stealing food. The generosity o...