The ups and downs of early atmospheric oxygen

A team of biogeochemists at the University of California, Riverside, give us a nontraditional way of thinking about the earliest accumulation of oxygen in the atmosphere, arguably the most important biological event in Earth history. A general consensus asserts that appreciable oxygen first accumulated in Earth’s atmosphere around 2.3 billion years ago during the so-called…

Yellowstone supereruption would send ash across North America

In the unlikely event of a volcanic supereruption at Yellowstone National Park, the northern Rocky Mountains would be blanketed in meters of ash, and millimeters would be deposited as far away as New York City, Los Angeles and Miami, according to a new study. An improved computer model developed by the study’s authors finds that…

Volcanoes helped offset man-made warming: study

Volcanoes spewing Sun-reflecting particles into the atmosphere have partly offset the effects of Man’s carbon emissions over a 15-year period that has become a global-warming battleground, researchers said Sunday. A so-called hiatus in warming since 1998 has pitched climate sceptics against mainstream scientists. While temperatures have risen relentlessly—13 of the l4 warmest years on record…

Lava flowing toward homes on Hawaii’s Big Island

Residents in a rural, isolated region of Hawaii’s Big Island still reeling from a recent tropical storm turned their attention to a potential new disaster Thursday as scientists warned that a lava flow from a nearby volcano had moved closer to homes. The Hawaiian Volcano Observatory said lava from the Kilauea volcano could reach the…