thermal expansion – Shamskm: A site to exchange knowledge and solutions

CU-Boulder team develops new water splitting technique that could produce hydrogen

By Guest PostAugust 3, 2013Sciencealan weimer, biological engineering, boulder, brian evanko, charles musgrave, christopher muhich, contraction, holy grail, hydrogen, hydrogen molecules, janna martinek, kayla weston, metal oxides, mirror system, new, oxygen, oxygen atoms, produce hydrogen, solar thermal reactor, solar thermal system, sunlight, sustainable hydrogen economy, thermal expansion, university of colorado, water splitting technique, xinhua liang

A University of Colorado Boulder team has developed a radically new technique that uses the power of sunlight to efficiently split water into its components of hydrogen and oxygen, paving the way for the broad use of hydrogen as a clean, green fuel.

The CU-Boulder team has devised a solar-thermal system in which sunlight could be concentrated by a vast array of mirrors onto a single point atop a central tower up to several hundred feet tall. The tower would gather heat generated by the mirror system to roughly 2,500 degrees Fahrenheit (1,350 Celsius), then deliver it into a reactor containing chemical compounds known as metal oxides, said CU-Boulder Professor Alan Weimer, research group leader. (more…)

Century-Old Science Helps Confirm Global Warming

By Guest PostMay 25, 2013Environmentanthropogenic, argo array, australia, century old science, challengers voyage, global scientific survey, global warming, greenhouse gases, hms challenger, human activities, josh willis, life beneath, NASA, natural variation, ocean data, ocean profiling floats, ocean surface, oceanographic expedition, sandy bay, sea water, sea-level rise, temperature, thermal expansion, university analysis, university of tasmania, will hobbs

A new NASA and university analysis of ocean data collected more than 135 years ago by the crew of the HMS Challenger oceanographic expedition provides further confirmation that human activities have warmed our planet over the past century.

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. (more…)

New Research Lowers Past Estimates of Sea-Level Rise

By Guest PostMarch 17, 2012EnvironmentBangladesh, bermuda, bil haq, coral reef, east antarctic, fossil coral, geophysics, glaciers, greenhouse gas emissions, greenland, ice sheet, maureen raymo, national science foundation, North America, paleoceanography, projection, reef, sea, sea level projection, sea-level rise, seashells, seawater, sub tropical islands, the bahamas, thermal expansion, united nations, warm period, west antarctica

*Projections for the future still loom large*

The seas are creeping higher as the planet warms. But how high could they go?

Projections for the year 2100 range from inches to several feet, or even more.

The sub-tropical islands of Bermuda and the Bahamas are two seemingly unlikely places scientists have gone looking for answers. (more…)

Tag Archives: thermal expansion

CU-Boulder team develops new water splitting technique that could produce hydrogen

Century-Old Science Helps Confirm Global Warming

New Research Lowers Past Estimates of Sea-Level Rise