News tagged with sediment core
New study may answer questions about enigmatic Little Ice Age
A new University of Colorado Boulder-led study appears to answer contentious questions about the onset and cause of Earth's Little Ice Age, a period of cooling temperatures that began after the Middle Ages ...
Space & Earth / Earth Sciences
Jan 30, 2012 |
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Scientists look to microbes to unlock Earth's deep secrets
(PhysOrg.com) -- Of all the habitable parts of our planet, one ecosystem still remains largely unexplored and unknown to science: the igneous ocean crust.
Space & Earth / Earth Sciences
Jan 10, 2012 |
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2012: Magnetic pole reversal happens all the (geologic) time
Scientists understand that Earth's magnetic field has flipped its polarity many times over the millennia. In other words, if you were alive about 800,000 years ago, and facing what we call north with a magnetic ...
Space & Earth / Earth Sciences
Nov 30, 2011 |
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Rising CO2 levels at end of Ice Age not tied to Pacific Ocean
At the end of the last Ice Age, atmospheric carbon dioxide levels rose rapidly as the planet warmed; scientists have long hypothesized that the source was CO2 released from the deep ocean.
Space & Earth / Earth Sciences
Oct 03, 2011 |
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Scientists study earthquake triggers in Pacific ocean
(PhysOrg.com) -- New samples of rock and sediment from the depths of the eastern Pacific Ocean may help explain the cause of large, destructive earthquakes similar to the Tohoku Earthquake that struck Japan ...
Space & Earth / Earth Sciences
Jun 29, 2011 |
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Salt marsh sediments help gauge climate-change-induced sea level rise
A newly constructed, 2,000-year history of sea level elevations will help scientists refine the models used to predict climate-change-induced sea level rise, according to an international team of climate researchers. The ...
Space & Earth / Earth Sciences
Jun 20, 2011 |
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Fastest sea-level rise in two millennia linked to increasing temperatures
(PhysOrg.com) -- An international research team including University of Pennsylvania scientists has shown that the rate of sea-level rise along the U.S. Atlantic coast is greater now than at any time in the ...
Space & Earth / Earth Sciences
Jun 20, 2011 |
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Rapid changes in Greenland climate last 5,000 years, study finds
(PhysOrg.com) -- Abrupt average temperature changes of as much as 4 or 5 degrees Celsius over a few decades may have profoundly affected human civilization for cultures that occupied western Greenland over ...
Space & Earth / Earth Sciences
Jun 01, 2011 |
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2,300-year climate record suggests severe tropical droughts as northern temperatures rise
A 2,300-year climate record University of Pittsburgh researchers recovered from an Andes Mountains lake reveals that as temperatures in the Northern Hemisphere rise, the planet's densely populated tropical ...
Space & Earth / Earth Sciences
May 11, 2011 |
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High seas may be responsible for Taiwan settlement
(PhysOrg.com) -- University of Hawaii archaeologists, led by Barry Rolett, have published a journal in Quaternary Science Reviews focusing on the early settlements of Taiwan. It is their belief that rising ...
Other Sciences / Archaeology & Fossils
Apr 05, 2011 |
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Reviving 100-year-old resting spores of diatoms
Diatoms account for a large proportion of the phytoplankton found in the water, and live both in the open sea and in freshwater lakes. By reviving 100-year-old spores that had laid buried and inactive in bottom ...
Space & Earth / Earth Sciences
Mar 01, 2011 |
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Ancient catastrophic drought leads to question: How severe can climate change become?
How severe can climate change become in a warming world? Worse than anything we've seen in written history, according to results of a study appearing this week in the journal Science.
Space & Earth / Earth Sciences
Feb 24, 2011 |
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Antarctic sea temperatures cooled in Holocene but now rising: study
(PhysOrg.com) -- A new study of an ocean sediment core taken from deep water off the coast of the western Antarctic Peninsula is beginning to fill in some of the gaps in our knowledge of climate variability ...
Space & Earth / Earth Sciences
Feb 10, 2011 |
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Dramatic ocean circulation changes revealed
The unusually cold weather this winter has been caused by a change in the winds. Instead of the typical westerly winds warmed by Atlantic surface ocean currents, cold northerly Arctic winds are influencing ...
Space & Earth / Earth Sciences
Jan 14, 2011 |
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Early settlers rapidly transformed New Zealand forests with fire
New research indicates that the speed of early forest clearance following human colonisation of the South Island of New Zealand was much faster and more intense than previously thought.
Dec 13, 2010 |
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