Global warming is back on the agenda with the Intergovernmental Panel on Climate Change set to release its latest scientific report on 2 February. Hints and leaks from scientists on the panel suggest that the IPCC will have strengthened its conclusions, previously stated in 2001, that humans are heating up the Earth.
While most scientists probably share this view, there are some who think otherwise. Many of those are either scientifically ill-informed or have dubious links with the energy industry. But one bona fide sceptic is Richard Lindzen, a climate physicist from the Massachusetts Institute of Technology, who was involved in preparing the IPCC's 2001 report. (p. 12)
Although Lindzen does not dispute that the Earth is getting hotter, he argues - in an interview with Physics World - that the warming is, in all probability, largely the result of natural variations in the Earth's climate. He believes that computer models of the Earth's climate, although rooted in the laws of physics, contain far too many uncertainties. Indeed, John Mitchell - the chief scientist of the UK's Meteorological Office - and colleagues describe how hard it is incorporate the impact of clouds into such climate models elsewhere in this issue of Physics World. They warn that if the clouds were modelled incorrectly, climate simulations "would be seriously in error". (p. 20)
Nevertheless, the balance of evidence does suggest that carbon dioxide being pumped into the atmosphere is having a significant warming effect. It is therefore right and prudent to limit greenhouse gas emissions as a way of dealing with the causes of climate change. However a small band of researchers is proposing various outlandish schemes to deal with the effects of climate change - an approach known as "geoengineering". As Physics World reports, these include pumping vast quantities of sulphur into the atmosphere to act as a huge Sun block, sending solar reflectors or even painting the roads white. (p. 10)Also in this issue:
Helen MacBain | alfa
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Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.
The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
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In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
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