In the 20th century, ocean levels rose by a global average of about 14 centimeters, mainly due to melting ice and warming waters. Some coastal areas saw more sea level rise than others. Here’s why:Expanding seawater
As water heats up, its molecules take up more space, contributing to global sea level rise. Local weather systems can influence that effect. In 2017 scientists reported in...
Each year when the monsoon rain sheets down and the tides swell over coastal Mumbai, Saif shutters his soda shop on Juhu Beach and takes shelter up in the rafters. Still, the water invades through the roof and over the concrete floors, sometimes reaching as high as the freezers full of ice cream.
For 36-year-old Saif, the coastal megacity’s chronic flooding is stressful. “What would...
A year ago, while news reports focused on the inundation of Houston by Hurricane Harvey, much of the Indian city of Mumbai was also underwater. Both coastal cities, more than 14,000 kilometers apart, had been swamped by extreme rainfall. Deputy news editor Katy Daigle, who had reported from India for seven years for the Associated Press before joining Science News, knew that flooding...08/09/2018 - 07:15 Science & Society, Climate, Earth
Letters to the Editor
Melt away08/09/2018 - 07:00 Climate, Particle Physics, Microbiology
In the last five years, Antarctica has lost ice nearly three times faster on average than it did over the previous 20 years — largely due to climate change, Laurel Hamers reported in “Antarctica has lost about 3 trillion metric tons of ice since 1992” (SN: 7/7/18, p. 6).
“Isn’t there a volcano or multiple volcanoes recently found under Antarctica that might also be...
Shading Earth by adding a veil of particles to the upper atmosphere may help to offset global warming — but at a cost.
Crop yields could decline, as they did following two colossal volcanic eruptions that shot sunlight-blocking sulfur particles high above the cloud layer and into the planet’s stratosphere, researchers report online August 8 in Nature. The study is the first to use real-...
Meghalayan\mehg-a-LAY-an \ n.07/20/2018 - 07:00 Earth, Climate, Anthropology
The newly named current geologic age that started 4,200 years ago.
Welcome to the Meghalayan, our geologic here and now. It’s one of three newly designated ages divvying up the Holocene Epoch, a geologic time period kicked off 11,700 years ago by the end of the Ice Age.
First came a warming period, now dubbed the Greenlandian Age. Then, about 8,300...
Deep water reefs are unlikely to be safe harbors for many fish and coral species from shallow reefs threatened by climate change and human activity. Shallow water creatures may have trouble adapting to conditions in the deep, scientists report in the July 20 Science. Plus, deep reefs are facing the same threats that are putting shallower ones at risk.
The study deals a blow to the “deep...
The northwestern United States has become an air pollution hot spot — literally.
Air quality in states from Nevada to Montana is worse than it was 30 years ago on the days with the most extreme air pollution. Bigger and more frequent wildfires that spew plumes of fine particulate matter into the sky are largely to blame, researchers report July 16 in Proceedings of the National Academy...
News in Brief
Climate change could make a showy invasive milkweed called a bloodflower even more of a menace for monarch butterflies than it already is.
Monarch caterpillars, which feed on plants in the milkweed family, readily feast on Asclepias curassavica. Gardeners in the southern United States plant it for its showy orange blooms, yet the species “is turning out to be a bit of a nightmare,” says...
All of the world’s rivers and streams together cover more area than the U.S. state of Texas.
A new estimate based on global satellite images shows that these waterways squiggle their way across about 773,000 square kilometers of land — or just over half a percent of Earth’s nonglaciated land surface. That’s roughly 44 percent more than previously estimated, researchers report online June...