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Antarctica is probably going to melt faster and more violently than we think
Motherboard
Another reason we need to begin preparing for rising tides, asap: New science shows that Antarctica is prone to rather violent periods of accelerated melt that then lead to years of rapid sea level rise. This is contrary to the current understanding of Antarctic melt, which had long been assumed to be slow and steady when the world emerged from the last ice age. Not so: At one point, thanks to Antarctica's melting ice sheets, sea levels rose 50 feet in a period of 350 years.
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SOCIETY NEWS


Goldschmidt2014 Mobile App
GS
The Goldschmidt2014 Mobile App has been designed to support and enhance your conference experience. Everything related to the Conference will be contained inside your smartphone device including full program details, onsite info, handy exhibitor information and access to conference abstracts, Download at: iTunes App Store | Android App | All other versions.
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PRODUCT SHOWCASE
  Analab Corrosion Resistant Laboratory Appliances

Analab manufacture corrosion resistant laboratory appliances such as acid vapour cleaning stations, hotplates, and sample preparation devices. Our devices can be used with a wide range of acids and bases (HF to NH4OH). We are represented in North America by Isomass Scientific.

Please visit us at Goldschmidt 2014 in Sacramento, booth 39.
 


Geochemical Career Center
GS


Chromium Isotope Oceanography—one PhD or two MSc positions (University of Saskatchewan, Saskatoon, SK, Canada)




Postdoctoral Position in Geochemistry Instrumentation (University of Alabama, Tuscaloosa, AL, USA)


Job Seekers: View current openings | Post your resume | Career resources

Employers: All jobs posted in the Geochemical Career Center are cross-promoted through Facebook, Twitter and right here in Geochemical News.

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PRODUCT SHOWCASE
  SESAR: Create Your Sample database

Do you work with samples of rocks, minerals, soils, water, etc.? SESAR can help you organize your sample metadata and ensure that your samples can be unambiguously cited, linked to data and publications via use of the IGSN (International Geo Sample Number), and become part of a global sample catalog.
 


New in GCA (v.133, 15 May 2014)
GS
Oxygen isotope fractionation in travertine-depositing pools at Baishuitai, Yunnan, SW China: Effects of deposition rates

Isotopic evidence for nitrogen mobility in peat bogs

New insights into the dynamics of adsorption equilibria of humic matter as revealed by radiotracer studies

Scanning photoelectron microscopy studies of freshly fractured chalcopyrite exposed to O2 and H2O

Variability in aerobic methane oxidation over the past 1.2 Myrs recorded in microbial biomarker signatures from Congo fan sediments

C27–C30 neohop-13(18)-enes and their saturated and aromatic derivatives in sediments: Indicators for diagenesis and water column stratification

The solubility of platinum in silicate melt under reducing conditions: Results from experiments without metal inclusions

Iron isotopes in an Archean ocean analogue

Evidence for extinct 135Cs from Ba isotopes in Allende CAIs?

Presolar graphite from the Murchison meteorite: An isotopic study

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LATEST NEWS


EAG Photo Contest
EAG
The European Association of Geochemistry (EAG) invites you to share your best geochemistry photos for their photo contest. Themes include: The changing world: geochemistry in action; Geochemistry and life; and Geochemistry in a test tube. Submissions are being accepted through June 15. Please visit the EAG Photo Contest page for more details.
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New open-access, multidisciplinary journal and Goldschmidt 2014 workshop sponsor.
Elementa Science
"The time is ripe and the prospects are good for a major new transdisciplinary Anthropocene community to come together and make unprecedented progress in understanding the human role in shaping and sustaining the terrestrial biosphere over the long term."

Erle C. Ellis, Co-author of "Dating the Anthropocene: Towards an empirical global history of human transformation of the terrestrial biosphere," as featured in Scientific American, "How Long Have Humans Dominated the Planet?"

Highly downloaded articles include:
Evidence of lasting impact of the Deepwater Horizon oil spill on a deep Gulf of Mexico coral community

Pen-Yuan Hsing, Bo Fu, Elizabeth A. Larcom, Samantha P. Berlet, Timothy M. Shank, Annette F. Govindarajan, Alexandra J. Lukasiewicz, Philip M. Dixon, and Charles R. Fisher

The changing Arctic Ocean by Kevin R. Arrigo

Does air capture constitute a viable backstop against a bad CO2 trip? By Wally Broeker

Read more about us.

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Four-billion-year-old rocks yield clues about Earth's earliest crust
ScienceDaily
It looks like just another rock, but what researchers are examining is a four-billion-year-old chunk of an ancient protocontinent that holds clues about how Earth's first continents formed. Continents today form when one tectonic plate shifts beneath another into Earth's mantle and cause magma to rise to the surface, a process called subduction. It's unclear whether plate tectonics existed 2.5 billion to four billion years ago or if another process was at play.
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Crucial West Antarctic glaciers are retreating unstoppably
Nature
Several of Antarctica's most vulnerable glaciers have already begun a runaway meltdown, two studies suggest. The work provides some of the first detailed forecasts of how quickly glaciers are likely to disappear from a region that has long been a concern for scientists. One paper uses modelling to find that ongoing losses at the Thwaites Glacier have permanently destabilized the ice river, which drains into West Antarctica's Amundsen Sea. In the second study, satellite radar observations reveal that Thwaites and four neighbouring glaciers have nothing to hold them back from catastrophic collapse, so they are more vulnerable than was previously thought.
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History shows that parched Aral Sea can be restored
NewScientist
In 1961, the Aral Sea in central Asia was the world's fourth largest lake. But massive irrigation programs begun during the Soviet era diverted water from the rivers that feed it, reducing the lake's volume to just 10 percent of what it was and leaving large areas dry. The ecosystem has collapsed, the desiccated lake bed is laced with pesticides that are spread by dust storms and drinking water is polluted. Now geologists have discovered that the Aral Sea has previously recovered naturally from such severe declines.
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Staking a claim: Deep-sea mining nears fruition
EARTH
In the late 1970s, geologists in a deep-sea submersible several kilometers below the waves on the Galapagos Rift discovered a previously unknown world: hydrothermal vent systems supporting an array of exotic life that thrived in the absence of sunlight, subsisting instead on metals and minerals leached from the seafloor. Such hydrothermal vent systems are now recognized features of mid-ocean ridges.
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TRENDING ARTICLES
Missed last week's issue? See which articles your colleagues read most.

    Earth's lower mantle may be significantly different than previously thought (ScienceDaily)
Deep earth recycling of the oceanic floor: New insight into the temperature of deep Earth (ScienceDaily)
Study shows iron from melting ice sheets may help buffer global warming (reportingclimatescience.com)
New underwater volcano discovered in Hawaii (LiveScience)

Don't be left behind. Click here to see what else you missed.


 

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