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Climate change has amped up hurricane wind speeds by 30 kph on average

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As if hurricanes needed any more kick.

Human-caused climate change is boosting the intensity of Atlantic hurricanes by a whole category on the Saffir-Simpson Hurricane Wind Scale, which rates hurricanes based on their peak sustained wind speed, researchers report November 20 in two new studies.

From 2019 to 2023, climate change enhanced the maximum wind speeds of hurricanes by an average of about 29 kilometers per hour (18 miles per hour), or roughly the breadth of a Saffir-Simpson category, researchers report in Environmental Research: Climate. Climate change similarly increased the intensities of all hurricanes in 2024 by an average of about 29 kph (18 mph), escalating the risk of wind damage, a companion analysis from Climate Central shows. More

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    Climate change has amped up hurricane wind speeds by 30 kph on average

    As if hurricanes needed any more kick.

    Human-caused climate change is boosting the intensity of Atlantic hurricanes by a whole category on the Saffir-Simpson Hurricane Wind Scale, which rates hurricanes based on their peak sustained wind speed, researchers report November 20 in two new studies.

    From 2019 to 2023, climate change enhanced the maximum wind speeds of hurricanes by an average of about 29 kilometers per hour (18 miles per hour), or roughly the breadth of a Saffir-Simpson category, researchers report in Environmental Research: Climate. Climate change similarly increased the intensities of all hurricanes in 2024 by an average of about 29 kph (18 mph), escalating the risk of wind damage, a companion analysis from Climate Central shows. More

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    in Space & Astronomy

    Einstein’s gravity endures despite a dark energy puzzle 

    Scientists could be wrong about dark energy. But they’re right about gravity, a new study suggests.

    Dark energy, the mysterious phenomenon that causes the expansion of the cosmos to accelerate, is widely thought to have had a constant density throughout the history of the universe. But dark energy may instead be waning, researchers from the Dark Energy Spectroscopic Instrument, or DESI, collaboration report November 19 in a batch of papers posted to the project’s website and arXiv.org. 

    The finding reaffirms an April report from the same team that had come to a similar conclusion (SN: 4/4/24). Simultaneously, the new analysis — a more thorough look at the same data used in the earlier report — confirms that the DESI data agree with general relativity, Albert Einstein’s theory of gravity, with no evidence for alternative, “modified gravity” theories.  More

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    in Heart

    The world’s largest coral was discovered in the South Pacific

    Off the coast of the Solomon Islands lurks a centuries-old being that is so immense, it can be seen from space.

    Discovered in October by the National Geographic Society’s Pristine Seas team, it is the world’s largest standalone coral. Coming in at roughly 34 meters wide, 32 meters long and 6 meters tall, the behemoth coral is longer than the average blue whale. It also dwarfs the world’s next largest-known coral, a 22-meter-wide coral in American Samoa known as Big Momma. More

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    in Heart

    22 pesticides show links to prostate cancer

    Nearly two dozen pesticides are associated with an increased risk of prostate cancer in the United States, researchers report November 4 in Cancer. Four of those, the study finds, are also linked to prostate cancer deaths.

    The findings can’t say for certain that these pesticides caused prostate cancer, says John Leppert, a urologist at Stanford University School of Medicine. It’s unknown whether the people who were diagnosed with prostate cancer in Leppert’s data were exposed to the pesticides. More

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    Fire-prone neighborhoods on the fringes of nature are rapidly expanding

    People are flocking to nature’s doorstep, and into wildfire territory.

    Homes constructed where human development meets undeveloped wildland are particularly vulnerable to wildfires and other natural hazards (SN: 11/9/23). Nonetheless, people are moving into the wildland-urban interface, or WUI, and rapidly expanding it. From 2000 to 2020, the global footprint of the WUI grew by about 35 percent, reaching a total area that’s roughly the size of Mexico, researchers report November 8 in Science Advances. More

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    in Heart

    Meet Chonkus, the mutant cyanobacteria that could help sink climate change

    Stand back, ordinary ocean-dwelling, oxygen-spewing organisms: There’s a new green, hulkish mutant in town.

    And hefty UTEX 3222 — dubbed “Chonkus” by the researchers who found it — may have just the right combination of traits to help with some of humanity’s most pressing problems. In particular, Chonkus could help fight climate change, report microbiologist Max Schubert, formerly of the Wyss Institute at Harvard and now launching a start-up, and colleagues in a study published October 29 in Applied and Environmental Microbiology.  

    Chonkus (right) settles quickly to the bottom of a water-filled test tube, compared with another strain of cyanobacteria (left). That quick accumulation of green sludge could make it more useful for sequestering atmospheric carbon dioxide.Ted Chavkin

    Chonkus was discovered in the shallow sunlit waters off the coast of Italy’s Vulcano Island, where volcanic gas-rich groundwater seeps into the sea. It’s an environment that Schubert and colleagues suspected to be fertile ground for finding photosynthesizing, carbon-consuming microbes. The waters collected from those seeps turned out to contain a spontaneous mutant strain of Synechococcus elongatus, a species of photosynthesizing bacteria that’s at the base of ocean food webs around the world (SN: 10/20/16; SN: 6/9/16).

    S. elongatus is a favorite lab organism, because of how quickly it grows and how resistant it is to environmental stressors (SN: 6/14/17). And Chonkus, the new mutant, is like a superpowered version, the team found. When they cultured the strain in the laboratory, its individual cells were larger than those of other fast-growing cyanobacteria, and it built larger colonies. The mutant also contained more carbon than other strains of S. elongatus, apparently stored in white granules within its cells. The strain was also heavy: When placed into a test tube, the cyanobacteria rapidly sank to the bottom, forming a dense sludge. More

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    This marine biologist discovered a unique blue whale population in Sri Lanka

    Pooping whales changed the course of Asha de Vos’ career.

    The Sri Lankan marine biologist was aboard a research vessel near her home island in 2003 when she spotted six blue whales congregating. A bright red plume of whale waste was spreading across the water’s surface.

    Seeing whale poop, colored red thanks to the whale’s diet, was the first clue that Sri Lanka’s blue whales don’t migrate between feeding and breeding areas.A. de Vos

    De Vos, then a master’s student, recalls being “super excited.” What she witnessed went against prevailing dogma: Her textbooks and professors had taught that blue whales, like other large whales, embark on long-distance migrations between colder feeding areas and warmer breeding and calving areas. But seeing whales pooping in tropical waters meant the behemoths must be feasting locally.

    Intrigued, de Vos spent the next few years documenting how blue whales near Sri Lanka differ from those elsewhere in the world. For one, the population feeds on shrimp rather than krill. The whales also have unique songs. But the key difference, she realized, is that they remain year-round in the waters between Sri Lanka, Oman and the Maldives — making them the only nonmigratory blue whales in the world. Abundant upwellings of nutrient-rich water from the ocean depths support a steady food supply for the whales.

    Eventually, the International Whaling Commission, the intergovernmental body dedicated to protecting whales, recognized Sri Lanka’s blue whales as a distinct subspecies called Balaenoptera musculus indica.

    By studying the blue whales around Sri Lanka, marine biologist Asha de Vos discovered they are the only nonmigratory blue whales in the world.Franco Banfi/Nature Picture Library/Alamy Stock Photo

    This distinction is crucial for conservation management, explains retired whale biologist Phillip Clapham, formerly of the U.S. National Oceanic and Atmospheric Administration’s National Marine Fisheries Service. Small, localized populations — like the one in Sri Lanka — face higher risks of being wiped out in the face of environmental or human threats, such as deep-sea mining.

    More than two decades on, de Vos is now one of Sri Lanka’s most renowned scientists — famed for nurturing the country’s nascent marine biology scene. She is also an ardent champion for greater diversity among researchers in ocean conservation. More

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    in Heart

    Fans may not keep older adults cool during heat waves

    Air blowing from an electric fan alone isn’t enough to cool off older adults sweltering indoors in a heat wave, new research shows. A study of 18 adults aged 65 to 72, monitored in a controlled-climate chamber simulating extreme heat wave conditions, found little difference in peak core temperatures as a result of electric fan use, scientists report October 17 in the Journal of the American Medical Association.

    Older adults, many of whom prefer to weather heat waves their own homes, are particularly at risk for heat-related health impacts (SN: 5/14/24). In the absence of access to air conditioning, using pedestal-style electric fans has been one recommended strategy for individuals at home to try to stay cool. Fans can speed up heat loss, lowering the body’s core temperature, by increasing sweat evaporation. More