Gravity waves form in the atmosphere as a result of destabilizing processes, for example at weather fronts, during storms or when air masses stroke over mountain ranges. They can occasionally be seen in the sky as bands of cloud. For weather forecast and climate models, however, they are mostly “invisible” due to their short wavelength. The effects of gravity waves can only be taken into consideration by including additional special components in the models. The “MS-GWaves” research unit funded by the German Research Foundation and led by Goethe University Frankfurt has meanwhile further developed such parameterizations and will test them in the second funding period.

A new study suggests that nations have a bit more time than previously thought if they want to cut greenhouse gas emissions and limit global warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit). The research, published in the journal Nature Geoscience, finds that the world’s economies can emit an additional 700 billion tons of carbon dioxide before exceeding 1.5 degrees — more than twice previous estimates.

The onset of the last ice age may have forced some bird species to abandon their northerly migrations for thousands of years, says new research led by a University of Nebraska-Lincoln ornithologist.

NASA looked into Hurricane Maria and found that powerful convective storms within the hurricane were dropping heavy rainfall. Maria brought that heavy rainfall to Puerto Rico and made landfall on Sept. 20 at 6:15 a.m. EDT.

The Southern Ocean is key to Earth’s climate, but the same gusting winds, big waves and strong currents that are important to ocean physics make it perilous for oceanographers.

In the past 540 million years, the Earth has endured five mass extinction events, each involving processes that upended the normal cycling of carbon through the atmosphere and oceans. These globally fatal perturbations in carbon each unfolded over thousands to millions of years, and are coincident with the widespread extermination of marine species around the world. 

Satellite imagery shows that Jose is a large storm, with a large reach. NASA’s Aqua satellite captured cloud top temperatures of Tropical Storm Jose that revealed the strongest storms were in the northeastern part of the tropical cyclone but the storm is so large that it is causing dangerous ocean conditions from Bermuda to the U.S. East coast.

Forest fires in Southeast Asia during the El Niño droughts of 2015 caused considerable disruption to the biodiversity of the region due to the smoke-induced ‘haze’ they created, according to new research led by Benjamin Lee at the University of Kent and the National Parks Board in Singapore.

It is widely recognized that rainfall over the Yangtze River valley (YRV) strengthens considerably during the decaying summer of El Niño, as demonstrated by the catastrophic flooding suffered in the summer of 1998. Nevertheless, the rainfall over the YRV in the summer of 2016 was much weaker than that in 1998, despite the intensity of the 2016 El Niño having been as strong as that in 1998. A group of scientists from the Institute of Atmospheric Physics, Chinese Academy of Sciences, have now revealed the remarkable role played by the mid-latitude circulation in this surprising feature.

Researchers at the University of Alaska Fairbanks’ Geophysical Institute are exploring the changing chemistry of the Arctic’s atmosphere to help answer the question of what happens as snow and ice begin to melt.