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'Tipping points' could come this century
02-04-2008 · EurekAlert!A number of key components of the Earth's climate system could pass their 'tipping point' this century, according to new research led by a scientist at the University of East Anglia.
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Keywords: tipping, points, come, century, point
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- Research finds that Earth's climate is approaching 'dangerous' point
05-31-2007 · EurekAlert!
NASA and Columbia University Earth Institute research finds that human-made greenhouse gases have brought the Earth's climate close to critical tipping points, with potentially dangerous consequences for the planet.
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- Arctic sea ice decline may trigger climate change cascade, says University of Colorado study
03-15-2007 · EurekAlert!
Arctic sea ice that has been dwindling for several decades may have reached a tipping point that could trigger a cascade of climate change reaching into Earth's temperate regions, says a new University of Colorado at Boulder study.
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- Geographer designs computer model to predict crowd behavior
05-21-2007 · EurekAlert!
Patterns of human behavior and movement in crowded cities -- the tipping point at which agitated crowds become anti-social mobs, the configuration of civic areas as defensible spaces that also promote free speech, the design of retail space that fosters active walking -- are at the core of an immersive 3-D computational model under development by an Arizona State University geographer.
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- Predicting catastrophic transitions
05-22-2007 · EurekAlert!
Complex systems, such as the earth's climate, coral reefs, oceans and socioeconomic systems, seem to respond little to gradual change until a critical tipping point is reached, after which the system may collapse completely. After such collapse, the original state of the system is hard to restore. Recovery time after small disturbances may predict coming collapse.
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- Expect a warmer, wetter world this century, computer models agree
10-19-2006 · EurekAlert!
Recent heat waves, long dry spells and heavy bursts of rain and snow hint at longer-term changes to come, according to a new study based on several advanced climate models. Much of the world will face significant changes in extreme weather events by the end of this century.
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- Reef warns of sea level rise
11-08-2006 · EurekAlert!
Margaret River in Western Australia, famed for its wine, is about to become famous for another reason -- warning coastal dwellers what they may have to cope with under global warming. A fossil coral reef, lying several metres above today's high tide mark at Foul Bay near Margaret River, points to the high point of the last major sea level rise.
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- Seven-point system gauges seriousness of heart failure in elderly
11-09-2006 · EurekAlert!
A simple points system may soon help guide treatment of elderly heart failure patients. Researchers at Washington University School of Medicine in St. Louis found that by counting how many of seven easy-to-obtain health factors a patient has, physicians can estimate the patient's risk of dying.
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- Study: Immigration can lower prices of consumer products
08-23-2007 · EurekAlert!
A forthcoming study challenges the predictions of the perfectly competitive model -- that an increase in demand leads to higher prices. Instead, the study finds that immigration can lower the prices of food, clothing, furniture, and appliances and have a significant moderating effect on inflation. Saul Lach (Hebrew University of Jerusalem and the CEPR) finds that a one percentage point increase in the ratio of immigrants to natives in a city decreases prices by 0.5 percentage points on average.
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- Secrets in rare cartography
11-20-2007 · EurekAlert!
Quietly housed at the University of Wisconsin-Milwaukee since 1978 is a collection of more than a million items acquired by the American Geographical Society since its inception in 1851. Half of the items are maps and charts, some dating to 15th century, and other items have come from explorer-members, such as Charles Lindbergh, Robert Peary and Theodore Roosevelt. Four AGS holdings are currently on view during the World Festival of Maps in Chicago.
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- Does a component of niacin point the way to anti-aging drugs?
02-08-2007 · EurekAlert!
In recent years, scientists have discovered that a family of enzymes called sirtuins can dramatically extend life in organisms as diverse as yeast, worms and flies. A number of scientific groups and biotechnology companies are eagerly searching for drug candidates able to boost sirtuin activity, hoping to develop an "anti-aging" drug. Now, a new study from scientists at the Wistar Institute points to another strategy for activating sirtuins to unleash their anti-aging powers.
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