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Ice cores map dynamics of sudden climate changes
New, extremely detailed data from investigations of ice cores from Greenland show that the climate shifted very suddenly and changed fundamentally during quite few years when the ice age ended. Researchers from the Niels Bohr Institute of University of Copenhagen have together with an international team analysed the ice cores from the NorthGRIP drilling through the Greenland ice cap, and the epoch-making new results have been published in the highly esteemed scientific journal Science and in Science Express. (2008-06-19)

Retracing Antarctica's glacial past
More than 26,000 years ago, sea level was much lower than it is today partly because the ice sheets that jut out from the continent of Antarctica were enormous and covered by grounded ice -- ice that was fully attached to the seafloor. As the planet warmed, the ice sheets melted and contracted, and sea level began to rise. LSU Department of Geology & Geophysics Associate Professor Phil Bart and his students have discovered new information that illuminates how and when this global phenomenon occurred. (2018-09-25)

Arctic lake sediments show warming, unique ecological changes in recent decades
An analysis of sediment cores indicates that biological and chemical changes occurring at a remote Arctic lake are unprecedented over the past 200,000 years and likely are the result of human-caused climate change, according to a new study led by the University of Colorado at Boulder. (2009-10-19)

Scientists head to warming Alaska on ice core expedition
In an effort to better understand how the Pacific Northwest fits into the larger climate-change picture, scientists from the University of New Hampshire and University of Maine are heading to Denali National Park on the second leg of a multi-year mission to recover ice cores from glaciers in the Alaska wilderness. (2008-04-29)

Arctic sea ice loss in the past linked to abrupt climate events
A new study on ice cores shows that reductions in sea ice in the Arctic in the period between 30-100,000 years ago led to major climate events. During this period, Greenland temperatures rose by as much as 16 degrees Celsius. The results are published today in Proceedings of the National Academy of Sciences. (2019-02-11)

Past temperature in Greenland adjusted
One of the common perceptions about the climate is that the amount of carbon dioxide in the atmosphere, solar radiation and temperature follow each other. This correlation is also seen in the Greenland ice cores. But during a period of several thousand years up until the last ice age ended approximately 12,000 years ago, this pattern did not fit and this was a mystery to researchers. Now researchers from the Niels Bohr Institute have solved this mystery using new analytical techniques. (2014-09-04)

Global warming endangers South American water supply
Chile and Argentina may face critical water storage issues due to rain-bearing westerly winds over South America's Patagonian Ice-Field to moving south as a result of global warming. (2013-07-29)

The magnetic history of ice
The history of our planet has been written, among other things, in the periodic reversal of its magnetic poles. Scientists at the Weizmann Institute of Science propose a new means of reading this historic record: in ice. Their findings could lead to a refined probing ice cores and, in the future, might be applied to understanding the magnetic history of other bodies in our solar system, including Mars and Jupiter's moon Europa. (2020-06-28)

Simultaneous ice melt in Antarctic and Arctic
A publication appearing in the journal Science on Dec. 1 now furnishes indications that the two hemispheres attained their maximum ice sheet size at nearly the same time and started melting 19,000 years ago. (2011-12-02)

New Tibetan ice cores missing A-bomb blast
Ice cores drilled last year from the summit of a Himalayan ice field lack the distinctive radioactive signals that mark virtually every other ice core retrieved worldwide. That missing radioactivity, originating as fallout from atmospheric nuclear tests during the 1950s and 1960s, routinely provides researchers with a benchmark against which they can gauge how much new ice has accumulated on a glacier or ice field. (2007-12-11)

Evidence for sun-climate link reported by UMaine scientists
A team led by University of Maine scientists has reported finding a potential link between changes in solar activity and the Earth's climate. In a paper due to be published in an upcoming volume of the Annals of Glaciology, they describe evidence from ice cores pointing to an association between zonal wind strength around Antarctica and a chemical signal of changes in the sun's output. (2004-12-22)

Glaciologist Thompson to receive prestigeous Heineken award
An Ohio State researcher who has become famous for his work in using ice cores from drilled remote, mountaintop glaciers to unravel global climate histories for thousands of years is this year's winner of a prestigious international science prize. Lonnie G. Thompson, professor of geological sciences and researcher with the Byrd Polar Research Center, will receive the 2002 Dr. A.H. Heineken Prize for Environmental Sciences. (2002-04-22)

Researchers In Himalayas Retrieve Highest Ice Core Ever Drilled
An expedition to a glacier atop the world's 14th highest peak in the Himalayan Mountains returned with ice cores containing climate records that could reach into the last glacial stage -- some 12,000 years ago. The international expedition, led by Ohio State University researchers, included Americans, Chinese, Peruvians, and Russians. (1997-11-24)

Radar Data Will Help Scientists In Their Quest To Pinpoint Climate Change
Scientists from the University of Washington and the British Antarctic Survey explain in the March 25 issue of Nature how they successfully used ground-penetrating radar to show the precise location for each layer of glacial ice, a key to correctly interpreting ice cores to glean climate data. (1999-03-24)

Mysteriously warm times in Antarctica
A new study of Antarctica's past climate reveals that temperatures during the warm periods between ice ages (interglacials) may have been higher than previously thought. The latest analysis of ice core records suggests that Antarctic temperatures may have been up to 6°C warmer than the present day. (2009-11-19)

'Webcam' from Space: Envisat observing Wilkins Ice Shelf
In light of recent developments that threaten to lead to the break-up of the Wilkins Ice Shelf, ESA is making daily satellite images of the ice shelf available to the public via the (2008-12-12)

Mars is emerging from an ice age
Radar measurements of Mars' polar ice caps reveal that the mostly dry, dusty planet is emerging from an ice age, following multiple rounds of climate change. (2016-05-26)

International Greenland ice coring effort sets new drilling record in 2009
A new international research effort on the Greenland ice sheet with the University of Colorado at Boulder as the lead US institution set a record for single-season deep ice-core drilling this summer, recovering more than a mile of ice core that is expected to help scientists better assess the risks of abrupt climate change in the future. (2009-08-26)

Enormous aquifer discovered under Greenland ice sheet
Buried underneath compacted snow and ice in Greenland lies a large liquid water reservoir that has now been mapped by researchers using data from NASA's Operation IceBridge airborne campaign. (2013-12-23)

Ice stream retreats under a cold climate
Warmer ocean surface triggered the ice retreat during The Younger Dryas. (2017-10-19)

Climate changes are linked between Greenland and the Antarctic
Even if climate records from Greenland and Antarctic ice cores look different, climate of Artic and Antarctic are directly linked. Investigations of an Antarctic ice core indicate a principle connection between both hemispheres by a (2006-11-09)

West Greenland Ice Sheet melting at the fastest rate in centuries
New study from the West Greenland Ice Sheet shows that weather patterns and summer warming combine to drive ice loss that is at the highest levels in at least 450 years. (2018-03-28)

Migrating impurities in ancient ice can skew climate research findings
Chemicals trapped in ancient glacial or polar ice can move substantial distances within the ice, according to new evidence from University of Washington researchers. That means past analyses of historic climate changes, gleaned from ice core samples, might not be entirely accurate. (2001-05-29)

Climate change could trigger strong sea level rise
About 15,000 years ago, the ocean around Antarctica has seen an abrupt sea level rise of several meters. It could happen again. An international team of scientists with the participation of the University of Bonn is now reporting its findings in the magazine Scientific Reports. (2017-01-05)

CO2 was hidden in the ocean during the Ice Age
Why did the atmosphere contain so little carbon dioxide during the last Ice Age 20,000 years ago? Why did it rise when the Earth's climate became warmer? Processes in the ocean are responsible for this, says a new study based on newly developed isotope measurements. (2012-03-29)

Geology: Alpine summits may have been ice-free during life of Tyrolean Iceman
Alpine summits at 3,000 to 4,000 m may have been ice free until about 5,900 years ago, just before the lifetime of the Tyrolean Iceman (Oetzi), when new glaciers started to form, according to a study published in Scientific Reports. (2020-12-17)

Missing radioactivity in ice cores bodes ill for part of Asia
When Ohio State glaciologists failed to find the expected radioactive signals in the latest core they drilled from a Himalayan ice field, they knew it meant trouble for their research. But those missing markers of radiation, remnants from atomic bomb tests a half-century ago, foretell much greater threat to the half-billion or more people living downstream of that vast mountain range. (2008-11-18)

Two million-year-old ice cores provide first direct observations of an ancient climate
Princeton University-led researchers have extracted 2 million-year-old ice cores from Antarctica -- the oldest yet recovered -- that provide the first direct observations of prehistoric atmospheric conditions and temperatures. They used data from the ice cores to answer long-held questions about how our current colder, longer glacial cycle emerged. (2019-11-21)

Antarctic climate: Short-term spikes, long-term warming linked to tropical Pacific
Dramatic year-to-year temperature swings and a century-long warming trend across West Antarctica are linked to conditions in the tropical Pacific, according to an analysis of ice cores. The findings show the connection of the world's coldest continent to global warming, as well as to events such as El Niño. (2008-08-12)

Ancient drought and rapid cooling drastically altered climate
Two abrupt and drastic climate events, 700 years apart and more than 45 centuries ago, are teasing scientists who are now trying to use ancient records to predict future world climate. The events -- one, a massive, long-lived drought believed to have dried large portions of Africa and Asia, and the other, a rapid cooling that accelerated the growth of tropical glaciers -- left signals in ice cores and other geologic records from around the world. (2009-06-18)

Multiple sites rich in water ice found on Mars
Erosion on Mars is exposing deposits of water ice, starting at depths as shallow as one to two meters below the surface and extending 100 meters or more. (2018-01-11)

Massive volcanic eruption puts past climate and people in perspective
The largest volcanic eruption on Earth in the past millions of years took place in Indonesia 74,000 years ago and researchers from the Niels Bohr Institute can now link the colossal eruption with the global climate and the effects on early humans. The results are published in the scientific journal Climate of the Past. (2012-11-05)

Fossils provide insight into origin of unique Antarctic ecosystem
The origin of the unique plankton ecosystem of the circum-Antarctic Southern Ocean can be traced back to the emergence of the Antarctic ice sheets approximately 33.6 million years ago. This discovery, published today in Science, shows that the development of the sea-ice ecosystem possibly triggered further adaptation and evolution of larger organisms such as baleen whales and penguins. (2013-04-18)

They know the drill: UW leads the league in boring through ice sheets
Hollow coring drills designed and managed by UW-Madison's Ice Drilling Design and Operations program are used to extract ice cores that can analyze the past atmosphere. Shaun Marcott, an assistant professor of geoscience at UW-Madison, was the first author of a paper published today in the journal Nature documenting carbon dioxide in the atmosphere between 23,000 and 9,000 years ago, based on data from an 11,000-foot hole in Antarctica. (2014-10-30)

African ice core analysis reveals catastrophic droughts, shrinking ice fields, civilization shifts
A detailed analysis of six cores retrieved from the rapidly shrinking ice fields atop Tanzania's Mount Kilimanjaro shows that those tropical glaciers began to form about 11,700 years ago. The cores also yielded remarkable evidence of three catastrophic droughts that plagued the tropics 8,300, 5,200 and 4,000 years ago. Lastly, the analysis also supports researchers' prediction that these unique bodies of ice will disappear in the next two decades, the victims of global warming. (2002-10-17)

Study explains early warming of West Antarctica at end of last ice age
West Antarctica began emerging from the last ice age about 22,000 years ago -- well before other regions of Antarctica and the rest of the world. Scientists say that changes in the amount of solar energy triggered the warming of West Antarctica and the subsequent release of carbon dioxide from the Southern Ocean amplified the effect and resulted in warming on a global scale, eventually ending the ice age. (2013-08-14)

Carbon dioxide has played leading role in dictating global climate patterns
Increasingly, the Earth's climate appears to be more connected than anyone would have imagined. El Niño, the weather pattern that originates in a patch of the equatorial Pacific, can spawn heat waves and droughts as far away as Africa. (2010-06-17)

Greenland Ice Sheet is being shaped by its past
A stiff upper layer of ice that formed atop of the Greenland Ice Sheet during the Holocene era may be causing the deceleration of ice flow within, a new study suggests. (2016-02-04)

Sunlight has more powerful influence on ocean circulation and climate than North American ice sheets
A study reported in today's issue of Nature disputes a longstanding picture of how ice sheets influence ocean circulation during glacial periods. (2008-11-06)

Ancient global warming allowed greening of Antarctica
Ancient Antarctica was warmer and wetter than previously suspected, enough to support vegetation along its edges, according to a new study. (2012-06-17)

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