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Tropical caves shed light on ancient climate change
Our Amazing Planet    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Almost everything we know about noteworthy climate shifts such as ice ages comes from the cold northern latitudes. Polar ice cores and North Atlantic deep ocean sediments have revealed global glaciations and jumps in temperature and greenhouse gases such as carbon dioxide. But scientists have long wondered what was going on in the tropics during such shifts — an important question because climate patterns such as El Niño can have global effects.

To access the article, "Interglacial Hydroclimate in the Tropical West Pacific Through the Late Pleistocene", click here.
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 Society News


Goldschmidt2012: Workshops and exhibitors
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WORKSHOPS. Events of interest for Goldschmidt 2012 attendees include the following three workshops. Sat., June 23, there will be an all day workshop on The Role of Metasomatism in Geological Processes sponsored by Springer. Sun., June 24, features the EarthChem Community Workshop 2012 sponsored by EarthChem. The third workshop, held on Wed., June 27 will be an Early-Career Author Workshop presented by Katherine Eve of Elsevier, Inc. for early career researchers in both authoring and reviewing journals.

EXHIBITORS. Currently we have over 45 exhibitors for Goldschmidt 2012. If you are interested in exhibiting, visit our Exhibitor Information — hurry, there are only a few booths remaining.


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New in GCA (v86, 1 June 2012)
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Petrographic investigation of melt and matrix relationships in Chicxulub crater Yaxcopoil-1 brecciated melt rock and melt rock-bearing suevite (846–885 m, units 4 and 5)

Neon diffusion kinetics in olivine, pyroxene and feldspar: Retentivity of cosmogenic and nucleogenic neon

Internal 26Al–26Mg isotope systematics of a Type B CAI: Remelting of refractory precursor solids

Concurrent fractional and equilibrium crystallisation

Zinc isotopes in HEDs: Clues to the formation of 4-Vesta, and the unique composition of Pecora Escarpment 82502

D/H fractionation in the H2–H2O system at supercritical water conditions: Compositional and hydrogen bonding effects

An X-ray Absorption Fine Structure study of Au adsorbed onto the non-metabolizing cells of two soil bacterial species

Evidence for free oxygen in the Neoarchean ocean based on coupled iron–molybdenum isotope fractionation

Cosmogenic 36Cl in karst waters from Bunker Cave North Western Germany – A tool to derive local evapotranspiration?

The impact of igneous bedrock weathering on the Mo isotopic composition of stream waters: Natural samples and laboratory experiments

Self-consistent ion-by-ion growth model for kinetic isotopic fractionation during calcite precipitation

First-principles simulation of arsenate adsorption on the (1 1 2) surface of hematite

A thermodynamic model for the system SiO2-H2O near the upper critical end point based on quartz solubility experiments at 500–1100 °C and 5–20 kbar

Geochronological constraints on the age of a Permo–Triassic impact event: U–Pb and 40Ar/39Ar results for the 40 km Araguainha structure of central Brazil




 Latest News


Traces of inaugural life
ScienceNews    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Earth's first living organisms didn't leave behind footprints or bite marks or bones. These single cells thrived quietly in a tiny pocket somewhere on the planet. For centuries, scientists trying to describe this earliest life have relied on evidence provided by biology, studying what features modern life-forms have in common to deduce the most primitive components of cells. By working backward, biologists have developed proposals describing when and where such simple forms of life could have arisen. But the ideas so far are guesses at best, impossible to prove. More

Studying carbon in rivers
U.S. News & World Report    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Carbon gets a lot of attention, largely because of its impact on climate change. But its behavior in the atmosphere is only one part of the carbon cycle. The biological and physical changes to carbon on the earth also are key to how fast carbon moves through its cycle, as well as the form it takes. Thus, "it's important to study all aspects of the loop," says scientist Hilairy Hartnett. More

Palaeoclimate: Hot spells on land
Nature Geoscience (paid subscription required)    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The hothouse climate of the early Eocene epoch was punctuated by a series of transient warming events linked to massive carbon release. Detailed terrestrial records for three of these events indicate that they were caused by similar underlying mechanisms. More

Mars volcano study suggests planet's atmosphere was once thick, like Earth's
Science via The Huffington Post    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A new look at an ancient volcanic blast on Mars suggests that the Red Planet was much more Earth-like billions of years ago, with abundant surface water and a relatively thick atmosphere, scientists say. The air on Mars was likely at least 20 times denser 3.5 billion years ago than it is now, researchers said. More


 
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