Scientists find impact of open-ocean industrial fishing within centuries of bird bones
Clever use of high-resolution mass spectrometry allows rapid cataloging of sulfur-containing compounds in plant extracts
Plants are a rich resource of bioactive compounds, many of which have inspired therapeutic drugs. Yet countless plant compounds, potentially with medical uses, still remain to be identified. Kazuki Saito, ...
Apr 26, 2013
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Fossil shells and new geochemical technique provide clues to ancient climate cooling
Using a new laboratory technique to analyze fossil snail shells, scientists have gained insights into an abrupt climate shift that transformed the planet nearly 34 million years ago.
Apr 22, 2013
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Forest organic runoff breaks down faster than agricultural, urban runoff
Dissolved organic matter in streams and rivers can be broken down by sunlight or bacteria, providing a fuel source for aquatic ecosystems and affecting carbon dioxide and carbon monoxide concentrations as the organic matter ...
Apr 15, 2013
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New study reconciles carbon record disparities on land and on sea
(Phys.org) —It's a pressing question: How will the Earth's climate respond to future increases in atmospheric carbon dioxide (CO2)? Throughout geologic history, evidence of rapid, large-scale increases ...
Apr 04, 2013
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In prehistory, CO2 and warming went in lock-step
Levels of carbon dioxide rose hand-in-hand with warming at the end of the last Ice Age, according to a study Thursday that deals a blow to climate skeptics.
Feb 28, 2013
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Study finds Jurassic ecosystems were similar to modern: Animals flourish among lush plants
(Phys.org)—CO2 levels in fossil soils from the Late Jurassic confirm that climate, vegetation and animal richness varied across the planet 150 million years ago, suggesting future human changes to global ...
Jan 08, 2013
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Coral records suggest that recent El Nino activity rises above noisy background
By examining a set of fossil corals that are as much as 7,000 years old, scientists have dramatically expanded the amount of information available on the El Nino-Southern Oscillation, a Pacific Ocean climate ...
Jan 03, 2013
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Ups and downs of biodiversity after mass extinction
The climate after the largest mass extinction so far 252 million years ago was cool, later very warm and then cool again. Thanks to the cooler temperatures, the diversity of marine fauna ballooned, as paleontologists ...
Dec 21, 2012
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Building better barley
(Phys.org)—As one of the top 10 barley producers in the world, Canada faces a problem of adapting to the new normal of a warmer, drier climate.
Dec 06, 2012
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Greenland's viking settlers gorged on seals
Greenland's viking settlers, the Norse, disappeared suddenly and mysteriously from Greenland about 500 years ago. Natural disasters, climate change and the inability to adapt have all been proposed as theories ...
Nov 19, 2012
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Curiosity rover finds clues to changes in Mars' atmosphere
(Phys.org)—NASA's car-sized rover, Curiosity, has taken significant steps toward understanding how Mars may have lost much of its original atmosphere.
Nov 02, 2012
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Carbon tracking and climate models: Researchers study carbon cycling in deciduous trees
(Phys.org)—Using dogwood trees, scientists are gaining a better understanding of the role photosynthesis and respiration play in the atmospheric carbon dioxide cycle. Their findings will aid computer modelers ...
Nov 01, 2012
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Oxygen's ups and downs in the early atmosphere and ocean
Most researchers imagine the initial oxygenation of the ocean and atmosphere to have been something like a staircase, but with steps only going up. The first step, so the story goes, occurred around 2.4 billion ...
Oct 23, 2012
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'Time-capsule' Japanese lake sediment will improve radiocarbon dating
A new series of radiocarbon measurements from Japan's Lake Suigetsu will give scientists a more accurate benchmark for dating materials, especially for older objects, according to a research team that included ...
Oct 18, 2012
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