NASA scientists are leading an airborne field experiment to a warm tropical locale to take a close look at a largely unexplored region of the chilly upper atmosphere. This area is critical to the recovery of the ozone layer and predicting future climate change. This very cold region far above the Earth’s equator (54,000 feet), a few miles higher than commercial aircraft can fly, is the main pathway where the lower part of the atmosphere, known as the troposphere, flows into the stratosphere.
High-altitude flights by a NASA aircraft based in Costa Rica during the month-long field campaign are being choreographed with the orbits of Aura, NASA’s latest Earth-observing spacecraft. Launched in 2004, Aura helps scientists understand how atmospheric composition affects and responds to Earth’s changing climate. The satellite helps to reveal the processes that connect local and global air quality, and also tracks the extent the Earth’s protective ozone layer is recovering.
In concert with global observations from Aura, the Costa Rica Aura Validation Experiment (CR-AVE) is tackling some of the remaining puzzles about how ozone-destroying chemicals get into the stratosphere and how high-altitude clouds affect the flow of one of the most powerful greenhouse gases -- water -- into this critical region. The project is an integrated science and satellite validation campaign sponsored by NASA’s Science Mission Directorate. Paul Newman, Goddard Space Flight Center, Greenbelt, Md., and Eric Jensen, Ames Research Center, Moffett Field, Calif., orchestrate the field activities as CR-AVE project scientists.
Rob Gutro | EurekAlert!
Global study of world's beaches shows threat to protected areas
19.07.2018 | NASA/Goddard Space Flight Center
NSF-supported researchers to present new results on hurricanes and other extreme events
19.07.2018 | National Science Foundation
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
19.07.2018 | Earth Sciences
19.07.2018 | Power and Electrical Engineering
19.07.2018 | Materials Sciences