News tagged with northern hemisphere

Tackling an Ice Age mystery

In the northern hemisphere, ice sheets ebb and flow in 100,000-year cycles, driven by varying amounts of sunlight falling on Earth's surface as its orbit and orientation toward the sun changes. But astronomical variations ...

dateSep 05, 2013 in Earth Sciences
shares0 comments 0

Earth's northern biomass mapped and measured

The biomass of the northern hemisphere's forests has been mapped with greater precision than ever before thanks to satellites, improving our understanding of the carbon cycle and our prediction of Earth's ...

dateJun 27, 2013 in Environment
shares0 comments 0

Comet Lemmon, Now in STEREO

An icy interloper was in the sights of a NASA spacecraft this past weekend. Comet 2012 F6 Lemmon passed through the field of view of NASA's HI2A camera as seen from its solar observing STEREO Ahead spacecraft. ...

dateApr 25, 2013 in Space Exploration
shares0 comments 0

Atmospheric carbon levels nearing historic threshold

(Phys.org) —For the first time in human history, concentrations of the greenhouse gas carbon dioxide (CO2) could rise above 400 parts per million (ppm) for sustained lengths of time throughout much of the Northern Hemisphere ...

dateApr 24, 2013 in Environment
shares0 comments 52