Above Scandinavia, on the Atlantic side of the Arctic Ocean, mackerel, cod, and other fish native to the European coast are migrating through increasingly ice-free waters, heading deeper into the Arctic Basin toward Siberia. Thousands of miles to the west, above Alaska, kittiwakes and other polar seabirds are being supplanted by southern birds following warm waters streaming north through the Bering Strait. And midway between, above Canada, sea ice-avoiding killer whales from the Atlantic are increasingly making themselves at home in a thawing Arctic.

Placing giant mirrors in orbit to reflect sunlight before it reaches Earth and launching millions of tons of sulfur into the stratosphere to simulate the effects of a major volcanic eruption are among the mind-boggling climate geoengineering projects that are starting to be considered as ways to mitigate the global warming caused by greenhouse gases.

Mixed forests are more productive than monocultures. This is true on all five continents, and particularly in regions with high precipitation. These findings from an international overview study, in which the Technical University of Munich (TUM) participated, are highly relevant for forest science and forest management on a global scale.

Hurricanes that intensify rapidly — a characteristic of almost all powerful hurricanes — do so more strongly and quickly now than they did 30 years ago, according to a study published recently in Geophysical Research Letters, a journal of the American Geophysical Union.

Everyone seems to be wondering, "What happened to spring?" Last month, a persistent flow of Arctic air blanketed the eastern two-thirds of the nation. Record cold, and even snow in some areas, delayed the onset of warm spring-like conditions.

NOAA’s National Weather Service is tapping technology to automate weather balloon launches in Alaska, a move that will allow staff to improve public service across the state while saving federal tax dollars.

Scientists drilling deep into ancient rocks in the Arizona desert say they have documented a gradual shift in Earth’s orbit that repeats regularly every 405,000 years, playing a role in natural climate swings. Astrophysicists have long hypothesized that the cycle exists based on calculations of celestial mechanics, but the authors of the new research have found the first verifiable physical evidence. They showed that the cycle has been stable for hundreds of millions of years, from before the rise of dinosaurs, and is still active today. The research may have implications not only for climate studies, but our understanding of the evolution of life on Earth, and the evolution of the Solar System. It appears this week in the Proceedings of the National Academy of Sciences.

As coastal lands in Louisiana erode, researchers, environmentalists and engineers are all searching for ways to preserve the marsh coastline.

Researchers at Indiana University have developed a new method for identifying communities that may be negatively affected by clean energy policies designed to hasten the move from fossil fuels to more environmentally friendly solutions.

New research from the University of North Carolina at Chapel Hill and collaborators found that most marine life in marine protected areas will not be able to tolerate warming ocean temperatures caused by greenhouse gas emissions. Marine protected areas have been established as a haven to protect threatened marine life, like polar bears, penguins and coral reefs, from the effects of fishing and other activities like mineral and oil extraction. The study found that with continued “business-as-usual” emissions, the protections currently in place won’t matter, because by 2100, warming and reduced oxygen concentration will make marine protected areas uninhabitable by most species currently residing in those areas.