A new study using a computer climate model to simulate the last 50 years of climate changes, projects warming over the next 50 years regardless of whether or not nations curb their greenhouse gas emissions soon. If no emission reductions are made and they continue to increase at the current rate, global temperatures may increase by 1-2 degrees Celsius [2-4 degrees Fahrenheit]. But if the growth rate of carbon dioxide does not exceed its current rate and if the growth of true air pollutants (substances that are harmful to human health) is reversed, temperatures may rise by only 0.75 degrees Celsius [1.4 degrees Fahrenheit].
"Some continued global warming will occur, probably about 0.5 degrees Celsius [0.9 degrees Fahrenheit] even if the greenhouse gases in the air do not increase further, but the warming could be much less than the worst case scenarios," says James E. Hansen, lead researcher on the study at NASAs Goddard Institute for Space Studies (GISS), in New York, New York. The research was a collaborative effort among 19 institutions, including seven universities, federal agencies, private industry and other NASA centers, and was funded by NASA. The results appear this month in the Journal of Geophysical Research-Atmospheres, published by the American Geophysical Union.
The GISS SI2000 climate model provided a convincing demonstration that global temperature change of the past half-century was mainly a response to climate forcing agents, or imposed perturbations of the Earths energy balance, according to the researchers. This was especially true of human-made forcings, such as carbon dioxide and methane, which trap the Earths heat radiation as a blanket traps body heat; thus causing warming.
Harvey Leifert | EurekAlert!
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01.12.2016 | NASA/Goddard Space Flight Center
Cyclic change within magma reservoirs significantly affects the explosivity of volcanic eruptions
30.11.2016 | Johannes Gutenberg-Universität Mainz
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
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