News tagged with oxygen isotopes
Oasis near Death Valley fed by ancient aquifer under Nevada Test Site
Every minute, 10,000 gallons of water mysteriously gush out of the desert floor at a place called Ash Meadows, an oasis that is home to 24 plant and animal species found nowhere else in the world.
Space & Earth / Earth Sciences
Jun 03, 2010 |
4.7 / 5 (6) |
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The Carbon Cycle Before Humans
Geoengineering -- deliberate manipulation of the Earth's climate to slow or reverse global warming -- has gained a foothold in the climate change discussion. But before effective action can be taken, the Earth's ...
Space & Earth / Earth Sciences
Feb 16, 2010 |
3.1 / 5 (19) |
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DNA testing on 2,000-year-old bones in Italy reveal East Asian ancestry
Researchers excavating an ancient Roman cemetery made a surprising discovery when they extracted ancient mitochondrial DNA (mtDNA) from one of the skeletons buried at the site: the 2,000-year-old bones revealed a maternal ...
Other Sciences / Archaeology & Fossils
Feb 01, 2010 |
4.5 / 5 (11) |
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Carbon and oxygen in tree rings can reveal past climate information
The analysis of carbon and oxygen isotopes embedded in tree rings may shed new light on past climate events in the Mackenzie Delta region of northern Canada.
Space & Earth / Earth Sciences
Dec 03, 2009 |
3 / 5 (4) |
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Earth's early ocean cooled more than a billion years earlier than thought (w/ Video)
(PhysOrg.com) -- The scalding-hot sea that supposedly covered the early Earth may in fact never have existed, according to a new study by Stanford University researchers who analyzed isotope ratios in 3.4 ...
Space & Earth / Earth Sciences
Nov 11, 2009 |
4.3 / 5 (12) |
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Snail fossils suggest semiarid eastern Canary Islands were wetter 50,000 years ago
Fossil land snail shells found in ancient soils on the subtropical eastern Canary Islands show that the Spanish archipelago off the northwest coast of Africa has become progressively drier over the past 50,000 years.
Space & Earth / Earth Sciences
Oct 27, 2009 |
2.5 / 5 (2) |
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Computer model documents the history of the West Antarctic ice sheet
(PhysOrg.com) -- One major threat of planetary warming is the melting of the great polar ice sheets, and the resulting rise in global sea level. Particularly worrisome to researchers is the fragility of the ...
Space & Earth / Earth Sciences
Aug 28, 2009 |
3.4 / 5 (10) |
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Abrupt global warming could shift monsoon patterns, hurt agriculture
At times in the distant past, an abrupt change in climate has been associated with a shift of seasonal monsoons to the south, a new study concludes, causing more rain to fall over the oceans than in the Earth's tropical regions, ...
Space & Earth / Earth Sciences
Jun 11, 2009 |
2.2 / 5 (6) |
2
Ancient mammals shifted diets as climate changed
A new University of Florida study shows mammals change their dietary niches based on climate-driven environmental changes, contradicting a common assumption that species maintain their niches despite global ...
Other Sciences / Archaeology & Fossils
Jun 03, 2009 |
4 / 5 (3) |
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53 million-year-old high Arctic mammals wintered in darkness
(PhysOrg.com) -- Ancestors of tapirs and ancient cousins of rhinos living above the Arctic Circle 53 million years ago endured six months of darkness each year in a far milder climate than today that featured ...
Space & Earth / Earth Sciences
Jun 01, 2009 |
4.8 / 5 (17) |
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The rise of oxygen caused Earth's earliest ice age
(PhysOrg.com) -- Geologists may have uncovered the answer to an age-old question - an ice-age-old question, that is. It appears that Earth's earliest ice ages may have been due to the rise of oxygen in Earth's ...
Space & Earth / Earth Sciences
May 07, 2009 |
4.6 / 5 (20) |
6
Peruvian stalagmites a new basis for 'Inconvenient truth'?
Will the Netherlands that is dominated by water succumb to the 'Inconvenient Truth' predicted by Al Gore? Dutch researcher Martin van Breukelen analysed stalagmites from the South American Amazon tributaries in Peru. He used ...
Space & Earth / Earth Sciences
Apr 29, 2009 |
3.1 / 5 (8) |
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Researchers Study Cave's 'Breathing' for Better Climate Clues
(PhysOrg.com) -- A University of Arkansas researcher studying the way caves "breathe" is providing new insights into the process by which scientists study paleoclimates.
Space & Earth / Earth Sciences
Mar 09, 2009 |
4.3 / 5 (3) |
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Half-baked asteroids have Earth-like crust
Asteroids are hunks of rock that orbit in the outer reaches of space, and scientists have generally assumed that their small size limited the types of rock that could form in their crusts. But two newly discovered ...
Space & Earth / Earth Sciences
Jan 07, 2009 |
4.7 / 5 (3) |
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