From volcanic eruptions to ozone holes, a NASA instrument that monitors Earths upper atmosphere marks twenty years in orbit.
The Stratospheric Aerosol and Gas Experiment II (SAGE II) instrument was deployed October 5, 1984, from the Space Shuttle Challenger aboard the Earth Radiation Budget Satellite (ERBS.) Originally scheduled for a two-year mission, SAGE II continues to give scientists a wealth of data on the chemistry and motions of the upper troposphere and stratosphere. "The importance of the SAGE II data is helping to solve some exceedingly important societal issues like ozone depletion and greenhouse warming," said SAGE II principal investigator Dr. M. Patrick McCormick, Co-Director of the Center for Atmospheric Sciences at Hampton University, Hampton, Va. "SAGE II has been a defining experience for my career and me."
Managed by NASA Langley Research Center in Hampton, Va., SAGE II is part of NASAs Earth Radiation Budget Experiment (ERBE.) The series of satellites launched in the mid -1980s were designed to investigate how energy from the Sun is absorbed and re-emitted by the Earth – one of the main processes that drive weather patterns. Observations from the ERB satellite are also used to study the effects on the Earths radiation balance from human activities -- burning fossil fuels and the use of chemicals -- and natural occurrences such as volcanic eruptions.
Chris Rink | EurekAlert!
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12.12.2017 | California Institute of Technology
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
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