Marine chemist Ken Buesseler (right) deploys a sediment trap from the research vessel Roger Revelle during a 2018 expedition in the Gulf of Alaska. Buesseler’s research focuses on how carbon moves through the ocean. Buesseler and co-authors of a new study found that the ocean’s biological carbon pump may be […]

The 2019 ozone hole reached its peak extent of 6.3 million square miles (16. 4 million square kilometers) on September 8. Abnormal weather patterns in the upper atmosphere over Antarctica dramatically limited ozone depletion this year. Credit: NASA Recovering and safely destroying the sources of these chemicals could speed ozone […]

Underwater coral drilling start. Credit: Jason Turl New international research has found a worrying change in the Indian Ocean’s surface temperatures that puts southeast Australia on course for increasingly hot and dry conditions. The work led by The Australian National University (ANU) and the ARC Centre of Excellence for Climate Extremes has […]

Altering the altitudes of less than two percent of flights could reduce contrail-linked climate change by 59 percent, says a new Imperial College London study. Small airplane altitude changes could cut contrail impact of flights by up to 59 percent. Aircraft contrails – the white streaks aircraft leave in the […]

These tiny meteorites, about half a millimeter across, fell into the ocean and were collected from the deep sea. Like the samples used in the new study, these more recent micrometeorites are made of iron. Credit: Donald Brownlee/University of Washington Very occasionally, Earth gets bombarded by a large meteorite. But […]

The auroral dunes appear as a green-tinged and even pattern of waves resembling a striped veil of clouds or dunes on a sandy beach. Credit: Kari Saari Working together with space researchers, Finnish amateur photographers have discovered a new auroral form. Named ‘dunes’ by the hobbyists, the phenomenon is believed […]

In a series of flights during NASA’s ACT-America campaign, Penn State researchers measured methane plumes in the atmosphere over portions of south central US. The researchers found measurements of methane emissions from the oil and natural gas industry are higher than EPA estimates. Credit: David Kubarek, Penn State Approximately twice […]

Scientists were expecting to see global emissions of HFC-23 drop by almost 90 percent between 2015 and 2017, but researchers have now shown that concentrations were increasing at an all-time record by 2018. Despite reports that global emissions of the potent greenhouse gas, HFC-23, were almost eliminated in 2017, an […]

CMU and NOAA mobile laboratories, collecting data in downtown Pittsburgh. Credit: CMU College of Engineering Despite the prominent health threat posed by fine particulate pollution, fundamental aspects of its formation and evolution continue to elude scientists. This is true especially for the organic fraction of fine particles (also called aerosol), […]