Northern hemisphere summers warmest in 600 years (Update)
Harvard researchers are adding statistical nuance to our understanding of how modern and historical temperatures compare.
Apr 10, 2013
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Nonnative salmon alter nitrification in Great Lakes tributaries
Historic legacy of lead pollution persists despite regulatory efforts
Efforts to reduce lead pollution have paid off in many ways, yet the problem persists and will probably continue to affect the health of people and animals well into the future, according to experts speaking at the annual ...
Feb 16, 2013
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Understanding the Earth's climate prior to the industrial era
Tree-rings, ice-cores, and speleothems are all used to reconstruct climate of the past millennia. But are these records reliable? Researchers of the Swiss Federal Research Institute WSL, the University of ...
Feb 05, 2013
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Central America tropical rainfall patterns varied through time
Historic lake sediment dug up by University of Pittsburgh researchers reveals that oceanic influences on rainfall in Central America have varied over the last 2,000 years, highlighting the fluctuating influence the Atlantic ...
Feb 04, 2013
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Researchers find sediment deposits increasing in Iowa lakes despite conservation efforts
(Phys.org)—A new study conducted by researchers at Iowa State University shows that the growth of sediment deposits at the bottom of Iowa's natural lakes is accelerating despite widespread soil conservation ...
Jan 14, 2013
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Oil sands study shows negative impact on lake systems
(Phys.org)—Fifty years of Athabasca oil sands development has left a legacy of contaminants in lake ecosystems and that contamination reaches further from the development areas than previously recognized, according to new ...
Jan 07, 2013
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High-Arctic heat tops 1,800-year high, says study
(Phys.org)—Summers on the Norwegian archipelago of Svalbard are now warmer than at any other time in the last 1,800 years, including during medieval times when parts of the northern hemisphere were as hot ...
Sep 28, 2012
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Multiple proxy datasets can clarify ancient climate regimes
(Phys.org) -- Tree ring and oxygen isotope data from the U.S. Pacific Northwest do not provide the same information on past precipitation, but rather than causing a problem, the differing results are a good ...
Jul 02, 2012
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Geologists map prehistoric climate changes in Canada's Yukon Territory
Researchers at the University of Pittsburgh have joined an international group of scientists to study past climate changes in the Arctic. Comprising geologists from Pitt's Department of Geology and Planetary Science, the ...
May 08, 2012
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Mud manifests history of clear water in murky Minnesota duck depot Lake Christina
During peak migration days in the early 1900s, tens of thousands of canvasback ducks could be seen floating and diving on Minnesota's Lake Christina. Since midcentury, changes to the lake have diminished this grand, iconic ...
Mar 27, 2012
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Controlling forest fires
Simon Fraser University statistician Rick Routledge will share his knowledge of what layers of charcoal in lake-bottom sediment can tell us about an area's forest fire history, at the world's largest science fair in Vancouver.
Feb 17, 2012
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New record from stalagmites shows climate history in Central Asia
The climate in Central Asia, currently a semiarid region, has varied over the past 500,000 years. An accurate record of the past climate can help scientists understand current climate and better predict how the climate may ...
Jan 31, 2012
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Engineering team heads to Antarctica to explore hidden lake
Next week a British engineering team heads off to Antarctica for the first stage of an ambitious scientific mission to collect water and sediment samples from a lake buried beneath three kilometres of solid ice. This extraordinary ...
Oct 10, 2011
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Fast-shrinking Greenland glacier experienced rapid growth during cooler times
Large, marine-calving glaciers have the ability not only to shrink rapidly in response to global warming, but to grow at a remarkable pace during periods of global cooling, according to University at Buffalo geologists working ...
Jul 14, 2011
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