All Articles Tagged As: core

Paleozoic 'sediment curve' provides new tool for tracking sea-floor sediment movements (10/3/2008)

Follows sea-level rise and fall between 542 and 251 million years ago ...> Full Article

The green Sahara, a desert in bloom (10/1/2008)

New North African climate reconstructions reveal three 'green Sahara' episodes during which the present-day Sahara Desert was almost completely covered with extensive grasslands, lakes and ponds over the course of the last 120.000 years. ...> Full Article

Research team proposes new link to tropical African climate (9/15/2008)

Scientists have discovered the Intertropical Convergence Zone may not be the key to southeast Africa's climate after all ...> Full Article

Ice core studies confirm accuracy of climate models (9/14/2008)

An analysis has been completed of the global carbon cycle and climate for a 70,000 year period in the most recent Ice Age, showing a remarkable correlation between carbon dioxide levels and surprisingly abrupt changes in climate. ...> Full Article

GOCE Earth explorer satellite to look at the Earth's surface and core (8/25/2008)

Spacecraft to investigate the Earth's gravitational field and to map the reference shape of our planet - the geoid - with unprecedented resolution and accuracy. ...> Full Article

Greenland Ice Core Reveals History of Pollution in the Arctic (8/21/2008)

Coal burning in Northern Hemisphere leaves potentially harmful heavy metal legacy ...> Full Article

New insights into center of the Earth (8/18/2008)

A new observation of the very deepest part of the Earth, the solid inner core ...> Full Article

Research team draws 150-meter ice core from McCall Glacier (7/12/2008)

A 150-meter ice core pulled from the McCall Glacier in the Arctic National Wildlife Refuge this summer may offer researchers their first quantitative look at up to two centuries of climate change in the region. ...> Full Article

Surprisingly rapid changes in the Earth's core discovered (7/8/2008)

Effects on the magnetic field ...> Full Article

Volcano 'pollution' solves mercury mystery (6/29/2008)

Scientists have discovered how volatile metals from volcanoes end up in polar ice cores. ...> Full Article

Ice cores map dynamics of sudden climate changes (6/22/2008)

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. ...> Full Article

A survivor in Greenland: A novel bacterial species is found trapped in 120,000-year-old ice (6/7/2008)

Scientists have discovered a new ultra-small species of bacteria that has survived for more than 120,000 years within the ice of a Greenland glacier at a depth of nearly two miles ...> Full Article

Studies confirm greenhouse mechanisms even further into past (5/17/2008)

The newest analysis of trace gases trapped in Antarctic ice cores now provide a reasonable view of greenhouse gas concentrations as much as 800,000 years into the past, and are further confirming the link between greenhouse gas levels and global warming ...> Full Article

Ice cores reveal fluctuations in the Earth's greenhouse gases (5/16/2008)

Ice cores from Antarctica show both the lowest atmospheric content of CO2 (carbon dioxide) and fast changes in the content of CH4 (methane) measured over the past 800,000 years. ...> Full Article

Geochemist Challenges Key Theory Regarding Earth's Formation (5/2/2008)

Researcher calls into question three decades of conventional wisdom regarding some of the physical processes that helped shape the Earth as we know it today. ...> Full Article

Scientists Head to Warming Alaska on Ice Core Expedition (5/2/2008)

Scientists on the second leg of a multi-year mission to recover ice cores from glaciers in the Alaska wilderness ...> Full Article

'New' Ancient Antarctic Sediment Reveals Climate Change History (4/29/2008)

Recent additions to the premier collection of Southern Ocean sediment cores at will give scientists a close-up look at fluctuations that occurred in Antarctica's ice sheet and marine and terrestrial life as the climate cooled considerably between 20 and 14 million years ago. ...> Full Article

Prestigious science prize awarded for 800,000 year old ice core (3/17/2008)

Ice core scientists from the British Antarctic Survey (BAS) are joint winners of a major European science prize. The European Project for Ice Coring in Antarctica (EPICA) - which retrieved two deep ice cores that have revealed how Earth's climate behaved over the last 800,000 years - is one of three projects to be awarded the 2007 Descartes Prize for excellence in collaborative research. Three winning trans-national research teams share this year's Descartes Prize of 1.36 million Euros. The prize is awarded annually to teams which have achieved outstanding scientific or technological results through collaborative research in any field of science. ...> Full Article

Researchers confirm discovery of Earth's inner, innermost core (3/11/2008)

Geologists have confirmed the discovery of Earth's inner, innermost core, and have created a three-dimensional model that describes the seismic anisotropy and texturing of iron crystals within the inner core. ...> Full Article

Warming climate may cause arctic tundra to burn (3/8/2008)

Research from ancient sediment cores indicates that a warming climate could make the world's arctic tundra far more susceptible to fires than previously thought. The findings, published this week in the online journal, PLoS ONE, are important given the potential for tundra fires to release organic carbon - which could add significantly to the amount of greenhouse gases already blamed for global warming. ...> Full Article

New Seafloor Cores Show Tight Bond Between Dust And Past Climates (3/5/2008)

Researchers hope to shed light on proposed manmade climate 'repairs' ...> Full Article

'Lost' Sediments Show Details of Polar Magnetic Field (3/1/2008)

Researchers studying cores of sediment collected 40 years ago have found evidence for magnetic field vortices in the Earth's core beneath the South Pole. The results contrast with earlier studies at lower latitudes, and could lead to a better understanding of processes in the core. ...> Full Article

Past greenhouse warming events provide clues to what the future may hold (2/18/2008)

If carbon dioxide emissions from the burning of fossil fuels continue on a "business-as-usual" trajectory, humans will have added about 5 trillion metric tons of carbon to the atmosphere by the year 2400. A similarly massive release of carbon accompanied an extreme period of global warming 55 million years ago known as the Paleocene-Eocene Thermal Maximum (PETM). ...> Full Article

Computer simulations strong support for new theory of earth's core (2/10/2008)

Researchers have presented evidence that their theory about the core of the earth is correct. Among other applications, the findings may be of significance for our understanding of the cooling down of the earth, and of the stability of the earth's magnetic field. ...> Full Article

New ice core shows more evidence of Antarctic Peninsula change (2/1/2008)

More evidence of changing weather patterns around the Antarctic Peninsula - a region where climate has changed rapidly over the last 50 years - is published this month in Geophysical Research Letters (online). ...> Full Article

New Antarctic Ice Core to Provide Clearest Climate Record Yet (1/23/2008)

After enduring months on the coldest, driest and windiest continent on Earth, researchers today closed out the inaugural season on an unprecedented, multi-year effort to retrieve the most detailed record of greenhouse gases in Earth's atmosphere over the last 100,000 years. ...> Full Article

Study May Solve Age-old Mystery of Missing Chemicals From Earth's Mantle (12/10/2007)

Observations about the early formation of Earth may answer an age-old question about why the planet's mantle is missing some of the matter that should be present, according to UBC geophysicist John Hernlund. ...> Full Article

Findings may reveal secret to interaction between Earth's core and mantle (11/29/2007)

Research into deep Earth interactions has led to some important findings, particularly for someone so new to the field, and the scientific world is paying attention. ...> Full Article

The wandering of the magnetic north pole (8/28/2007)

Fairbanks adventurer Roger Siglin has journeyed close to the magnetic north pole. Near Resolute, in the northern area of Canada now known as Nunavut, Siglin was 300 miles from the magnetic north pole, the wandering spot on Earth's surface that attracts compass needles and confounds scientists. ...> Full Article

Scientist Uncovers Earth's Mysterious Layer (6/25/2007)

Laboratory measurements of a high-pressure mineral believed to exist deep within the Earth show that the mineral may not, as geophysicists hoped, have the right properties to explain a mysterious layer lying just above the planet's core. ...> Full Article