je.st
news
Tag: earths
Scientists probe what killed Earths megafauna: Man or climate change?
2014-03-15 19:31:00| Climate Ark Climate Change & Global Warming Newsfeed
Observer: "However, it is also the case that tribes of modern humans were moving into these creatures` territories at these times - and many of us believe it is too much of a coincidence that this happened just as these animals vanished. These creatures had endured millions of years of climate change before then, after all. However, this was the first time they had encountered humans." Modern humans emerged from Africa around 70,000 years ago, travelled across Asia and reached Australia 50,000 years ago,...
Tags: man
change
killed
climate
A new renewable energy source? Device captures energy from Earth's infrared emissions to outer space
2014-03-04 14:03:00| Climate Ark Climate Change & Global Warming Newsfeed
ScienceDaily: When the sun sets on a remote desert outpost and solar panels shut down, what energy source will provide power through the night? A battery, perhaps, or an old diesel generator? Perhaps something strange and new. Physicists at the Harvard School of Engineering and Applied Sciences (SEAS) envision a device that would harvest energy from Earth's infrared emissions into outer space. Heated by the sun, our planet is warm compared to the frigid vacuum beyond. Thanks to recent technological advances,...
Ancient forests stabilized Earths CO2 and climate
2014-01-23 17:59:00| Climate Ark Climate Change & Global Warming Newsfeed
ScienceDaily: UK researchers have identified a biological mechanism that could explain how the Earths atmospheric carbon dioxide and climate were stabilised over the past 24 million years. When CO2 levels became too low for plants to grow properly, forests appear to have kept the climate in check by slowing down the removal of carbon dioxide from the atmosphere. The results are now published in Biogeosciences, an open access journal of the European Geosciences Union (EGU). As CO2 concentrations in...
Tags: ancient
climate
forests
co2
Under Arctic Ice, Photographer Captures Climate Shifts In Earth's Most Rapidly Changing Place
2013-12-24 22:32:00| Climate Ark Climate Change & Global Warming Newsfeed
Weather Channel: What does the future hold for the parts of the world that will be most affected by Earth's warming climate? This spring and summer, St. Louis-based photojournalist Randall Hyman spent four months getting a preview in Arctic Norway, a place he's visited again and again since the mid-1970s. What struck him most on this trip, a Fulbright Scholarship project between April and August, was a pace of change that "has really picked up in the last decade," Hyman said, since trips he made there in 2006...
Tags: place
changing
ice
rapidly
Geoengineering Earths Climate: Potential, Barriers And Ethics
2013-12-18 19:18:00| Climate Ark Climate Change & Global Warming Newsfeed
RedOrbit: Artificial clouds that reflect sunlight back into space. A StratoShield that spews sulfur dioxide particles into space like a volcano, cooling the planets surface. Microbial blooms that grow on iron injected into the ocean and trap carbon dioxide from the atmosphere. These are some of the latest ideas being tested to combat climate change in an emerging and hotly-debated field called geoengineering. Geoengineering involves use of technologies that deliberately manipulate the Earths climate,...
Tags: potential
ethics
climate
barriers
Sites : [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] next »