We are very concerned with the changing climate on Earth. The climate on other planets is more difficult to study, and direct observations are impossible, save some observations from the Mars rovers. Jupiter has an atmosphere that is very different from Earth's. The prominent Giant Red Spot, a swirling anti-cyclonic storm larger than Earth, appears to be a permanent fixture of the planet's atmosphere, and has been remarkably stable for decades.
Now the Great Red Spot has shrunk to its smallest size ever measured.
According to Amy Simon of NASA's Goddard Space Flight Center in Greenbelt, Maryland, recent NASA Hubble Space Telescope observations confirm the Great Red Spot now is approximately 10,250 miles across, less than half the size of some historical measurements. Astronomers have followed this downsizing since the 1930s.
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Rising greenhouse gas levels are causing stronger winds over the Southern Ocean. It's good news for Antarctica, writes Tim Radford, as the circumpolar winds are keeping its ice caps cold. But Australia is getting hotter and drier - and its problems will only increase.
The answer to one of the enduring puzzles of global warming - the apparently sluggish response of the Antarctic continent to rising greenhouse gas levels - may have been settled by Australian scientists.
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In a cave in Australia, researchers from the University of New South Wales discovered giant fossilized sperm. The sperm were produced 17 million years ago by a group of tiny, shelled crustaceans called ostracods, making them the oldest fossilized sperm ever found. The results were published recently in Proceedings of the Royal Society B. The fossils were excavated in 1988, but it wasn't known they contained sperm until they were studied in detail by an ostracod expert last year.
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Yellowstone National Park leaders in 2010 established a five-year plan to elevate Yellowstone as a world leader in environmental stewardship. In other words, lead by example by being one of the greenest parks in the world.
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Yesterday morning, black oil sprayed nearly 20 feet into the air in Atwater Village, a neighborhood in Los Angeles, California after a "valve malfunction" caused the oil to leak. The LA Fire Department (LAFD) estimates that 10,000 gallons have spilled and while much cleanup progress has been made, it will will take a few days to clean up all contamination. Crude oil was spilled across a half-mile area, according to an LAFD alert. The oil spill had created a pool approximately 40-feet wide and was knee-high in some areas.
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Clouds play a critical role in Earth's climate and are the largest source of uncertainty in present climate models, stemming from cloud formation complexity, according to the latest report of the Intergovernmental Panel on Climate Change.
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