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Data from HMS Challenger Expedition Helps Confirm Long Term Ocean Warming
May 25, 2013 07:50 AM - Roger Greenway, ENN
Global warming has been going on for a long time. What were the temperatures like a hundred years ago? Terrestrial records go back that far and farther, but what about ocean temperatures? In the late 1800's the HMS Challenger conducted extensive measurements of ocean temperatures across the globe. Researchers from the University of Tasmania, Sandy Bay, Australia; and NASA's Jet Propulsion Laboratory, Pasadena, Calif., combined the ship's measurements of ocean temperatures with modern observations from the international Argo array of ocean profiling floats. They used both as inputs to state-of-the-art climate models, to get a picture of how the world's oceans have changed since the Challenger's voyage. The Challenger expedition, from 1872 to 1876, was the world's first global scientific survey of life beneath the ocean surface. Along the way, scientists measured ocean temperatures, lowering thermometers hundreds of meters deep on ropes.
When I first read about NASA’s $125,000 grant to Systems and Materials Research Corporation to create a 3-D food printer, I was excited, confused, and a little weirded out. A range of thoughts and questions ran through my mind. What would the food be made out of? Would it taste and feel like real food, [...]
Brandon Cheshire, Owner & Chief Technical Officer at Arizona-based SunHarvest Solar, recently spoke with Sierra Club Green Home about the benefits of going solar. During the interview, they discovered that his home is not only solar powered, it’s carbon neutral. This means it’s completely energy independent and emissions-free. Here’s how he did it...
Each day, our industry sits down and whittles the unsightly knots off the tree we call solar energy. We, as a group, spend more time than we should pointing to one of a growing number of reasons why solar energy isn’t taking hold in America: that perhaps our government incentives were cut too quickly, that our state’s SREC program is broken, that the net metering requirements aren’t strong enough...