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Recovered Arctic expert predicts final collapse of sea ice withi

Recovered Arctic expert predicts final collapse of sea ice withi
Prof Peter Wadhams calls for “urgent” consideration of new ideas to reduce global temperatures. Photograph: John Mcconnico/AP One of the world's leading ice experts has predicted the final collapse of Arctic sea ice in summer months within four years. In what he calls a "global disaster" now unfolding in northern latitudes as the sea area that freezes and melts each year shrinks to its lowest extent ever recorded, Prof Peter Wadhams of Cambridge University calls for "urgent" consideration of new ideas to reduce global temperatures. In an email to the Guardian he says: "Climate change is no longer something we can aim to do something about in a few decades' time, and that we must not only urgently reduce CO2 emissions but must urgently examine other ways of slowing global warming, such as the various geoengineering ideas that have been put forward." These include reflecting the sun's rays back into space, making clouds whiter and seeding the ocean with minerals to absorb more CO2.

World-first hybrid shark found off Australia Scientists said on Tuesday that they had discovered the world's first hybrid sharks in Australian waters, a potential sign the predators were adapting to cope with climate change. The mating of the local Australian black-tip shark with its global counterpart, the common black-tip, was an unprecedented discovery with implications for the entire shark world, said lead researcher Jess Morgan. "It's very surprising because no one's ever seen shark hybrids before, this is not a common occurrence by any stretch of the imagination," Morgan, from the University of Queensland, told AFP. "This is evolution in action." Colin Simpfendorfer, a partner in Morgan's research from James Cook University, said initial studies suggested the hybrid species was relatively robust, with a number of generations discovered across 57 specimens. It means the Australian black-tip could be adapting to ensure its survival as sea temperatures change because of global warming.

Paleoclimatology Program - Perspective on Abrupt climate Change A positive feedback is a process in which an initial change will bring about an additional change in the same direction. An example of a simple positive feedback in everyday life is the growth of an interest-earning savings account. As interest is accrued the principal will begin to grow (assuming money is not withdrawn). There are also negative feedbacks, processes in which an initial change will bring about an additional change in the opposite direction. It is positive, rather than negative feedbacks that contribute to abrupt climate changes. What are some examples of positive feedbacks in the climate system? Ice-albedo feedback Ice has a higher albedo (or reflectivity) than vegetation, soil, or water. Vegetation feedbacks Climate strongly influences what types of vegetation grow in a certain area. Salt advection feedback in the thermohaline circulation

As Arctic Sea Ice Melts Thanks to Climate Change, Drilling for Oil The state of the Arctic, which is bad, may have just made the dreaded jump to worse. This summer, the sea ice that caps the Arctic Ocean melted to the lowest level since at least 1979, when satellites first began keeping track of ice over the North Pole. By the end of August, the National Snow Ice and Data Center (NSIDC) reported that Arctic ice had fallen to 1.54 million sq. miles (4 million sq. km). That’s nearly six times the size of Texas, but it’s still 45% less than the average for August throughout the 1980s and 90s — and as of now the ice is still shrinking. Nor is 2012 an anomaly — the ice cap has been shrinking over the years as temperatures have increased, and now some scientists believe the total volume of Arctic ice is only a quarter of what it was 30 years ago. Environmental activists latched onto the news of the Arctic melt as evidence that climate change was happening in real time — and even faster than scientists had predicted. (MORE: The Future of Oil)

Carcharias taurus, Grey Nurse Shark (East Coast population) listing advice Advice to the Minister for the Environment and Heritage from the Threatened Species Scientific Committee (TSSC) on Amendments to the list of Threatened Species under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) 1. Scientific name, common name (where appropriate), major taxon group Carcharias taurus, Grey Nurse Shark (East Coast population). 2. Carcharias taurus has a broad inshore distribution, primarily in sub-tropical to cool temperate waters around the main continental landmasses, except in the eastern Pacific Ocean off North and South America. NSW Fisheries conducted a distribution and abundance study on Grey Nurse Shark from 1998 to 2001 which included survey work on the species. There has been very little work conducted on the West Coast population of Carcharias taurus. 3. TSSC judges the East Coast population to be eligible for listing as endangered under the EPBC Act. Criterion 1 - Decline in numbers Criterion 2 - Geographic distribution 4. 5.

Scratch Markup Language (.sml) SML (Scratch Markup Language) is a new file format for recording and replaying turntablism. We’ve developed open-source tools for accurately capturing the record and crossfader movements of a scratch DJ, allowing us to analyze, transcribe, and recreate scratch performances. We want to do for turntablism what Graffiti Markup Language has done for tagging — especially teaching giant robot arms how to scratch. At Art Hack Day we collaborated with other artists and programmers to develop the first prototypes of ScratchML. Scratch data was saved to disk as .sml and broadcast as OSC, which allowed other Art Hack Day participants to build visualizations based on what the DJ was scratching during the exhibition. Our goal is to make capturing, replaying, and sharing a scratch performance accurate and easy. Throughout the week here on FAT we’ll be publishing ScratchML projects created during Art Hack Day, data specs, source code, hardware modification details and more. Want to get involved?

Why The Arctic Sea Ice Death Spiral Matters By Neven Acropolis with Kevin McKinney In the past week the Arctic sea ice cover reached an all-time low, several weeks before previous records, several weeks before the end of the melting season. The long-term decline of Arctic sea ice has been incredibly fast, and at this point a sudden reversal of events doesn’t seem likely. The question no longer seems to be “will we see an ice-free Arctic?” Arctic sea ice became a recurrent feature on planet Earth around 47 million years ago. Since the dawn of human civilization, 5000 to 8000 years ago, this annual ebb and flow of melting and freezing Arctic sea ice has been more or less consistent. What makes this event significant, is the role Arctic sea ice plays as a reflector of solar energy. But what happens in the Arctic, doesn’t stay in the Arctic. [JR: See Arctic Death Spiral: How It Favors Extreme, Prolonged Weather Events ‘Such As Drought, Flooding, Cold Spells And Heat Waves’.] – Neven Acropolis with Kevin McKinney Images used:

Songs of the Deep Few species on Earth communicate as frequently and effectively as human beings, and none so majestically or ubiquitously as whales. Immersed in an environment rich in sound but poor in light, whales and dolphins developed complex communication systems that they use to mate, feed, socialize, and navigate. The "vocabulary" of some types of whales such as the beluga and humpback is expansive, and rivals most non-humans creatures. The means and ends of these communications are most astounding to humans perhaps because we are accustomed to viewing communication as a sign of intelligence, and probably most people believe that humans are the only truly intelligent species on this planet. Using enormous gulps of air from the surface, the pod circles the school blowing streams of bubbles that form a curtain around the fish. These long-distance communications are carried along a natural underwater network of acoustic waveguides. Either way, they must be heard to be fully appreciated.

How to make a laptop cooling stand Laptops might have been designed with portability and long battery life in mind, but they weren't designed for comfort. Use a laptop on your coffee table for more than five minutes and you're transformed into a warped and twisted, hunchbacked visage of a human being. What you need is something that raises and angles your fine laptop into a more human-friendly angle. As it happens, it's easy enough to grab an acrylic sheet and bend the two ends to produce an effective custom laptop stand. An A3-sized acrylic sheet should be fine for most laptops. What you will need A3 acrylic sheetCase fanUSB cableProtective glovesHot-air paint stripperSoldering kitClampsWorkbenchWire wool 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Like this? Sign up for the free weekly TechRadar newsletterGet tech news delivered straight to your inbox.