As the Earth’s surface and lower atmosphere continue to warm, another part of the planet’s atmosphere is doing the opposite. Far above the ground, the upper atmosphere has been cooling significantly for decades. Scientists have long recognized this unusual contrast as one of the clearest signals of human driven climate change, but the exact physics … Read more
Scientists have identified surprisingly high levels of a little-known silicone pollutant in the atmosphere, raising new questions about possible risks to human health and the climate. The chemicals, known as methylsiloxanes, are commonly used in cosmetics, industrial products, transportation, and household items. Researchers found these compounds across a wide range of environments, from major cities … Read more
In January 2022, the underwater volcano Hunga Tonga-Hunga Ha’apai in the South Pacific produced one of the most powerful eruptions in modern history. But scientists have now discovered that the eruption also triggered an unexpected atmospheric reaction that partially removed methane, a potent greenhouse gas, from the air. Researchers say the finding could eventually help … Read more