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High carbon dioxide levels cause warming in tropics
University of Bristol via ScienceDaily
Higher concentrations of carbon dioxide in the atmosphere cause warming not only at high latitudes but also across tropical regions, according to new research. "These results confirm what climate models have long predicted — that although greenhouse gases cause greater warming at the poles they also cause warming in the tropics. Such findings indicate that few places on Earth will be immune to global warming and that the tropics will likely experience associated climate impacts, such as increased tropical storm intensity," the project leader said.
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GS and geochemistry at Fall AGU
Abstract submissions are being accepted through Aug. 6 for the 2014 Fall AGU meeting in San Francisco this December. AGU's Volcanology, Geochemistry and Petrology section has organized a number of interesting geochemistry sessions. AGU is also providing a number of Student Travel Grants and Scholarships for students and young scientists planning to attend. The application deadline is Aug. 13. The Geochemical Society will again be welcoming attendees to our exhibit (Booth 2801).
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  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.

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Geochemical Career Center

Faculty Position in Climate Change and Water Cycle (University of Michigan, Ann Arbor, USA)

Assistant Professor of Geochemistry (University of Tulsa, Tulsa, OK, USA)

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

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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  Download expert datasets from the EarthChem Library:

The IEDA EarthChem Library now hosts 142 expert datasets on solid earth, gas and water geochemistry as well as geochronology. Download expert-compiled datasets, such as the Central America and Izu-Bonin-Mariana arc lava database, from the EarthChem Library.

New in GCA (v.136, 15 June 2014)
Silicate speciation in H2O–Na2O–SiO2 fluids from 3 to 40 mol% SiO2, to 600 °C and 2 GPa

Soluble salts at the Phoenix Lander site, Mars: A reanalysis of the Wet Chemistry Laboratory data

An experimental study of the solubility of MoO3 in aqueous vapour and low to intermediate density supercritical fluids

Ferric saponite and serpentine in the nakhlite martian meteorites

EXAFS analysis of iron cycling in mangrove sediments downstream a lateritized ultramafic watershed (Vavouto Bay, New Caledonia)

Evolution of volatile species in the earth's mantle: A view from xenology

Fe(II)- and sulfide-facilitated reduction of 99Tc(VII)O4− in microbially reduced hyporheic zone sediments

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Ironing out details of the carbon cycle: Dissolved iron in North Atlantic traced to Sahara desert
University of South Carolina via ScienceDaily
Iron is an essential element in all living creatures, and its availability in seawater can have a profound effect on phytoplankton growth and, consequently, the earth's carbon cycle. Scientists have assessed the various sources of dissolved iron in the north Atlantic Ocean, establishing that a great deal of it, some 70 to 90 percent, originates from dust blowing off the Sahara desert.
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Earliest skeletal animals built reefs
Nature via Scientific American
Animal reef-building evolved millions of years earlier than previously thought, researchers report in Science. Scientists have discovered fossils indicating that animal, or metazoan, reefs date to as far back as about 548 million years ago, some seven million years earlier than previously estimated. This suggests they appeared prior to the Cambrian explosion, a wellspring of diverse life that is generally thought to have driven the proliferation of reef-building.
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Large rivers in US are becoming less acidic
Several large rivers in the U.S. are less acidic now, due to decreasing acidic inputs, such as industrial waste, acid mine drainage and atmospheric deposition. A USGS study showed that alkalinity, a measurement of a river's capacity to neutralize acid inputs, has increased over the past 65 years in 14 of the 23 rivers assessed in the U.S.
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AGU announces 2014 awards, medals and prizes honorees
The American Geophysical Union has announced its 2014 awardees, medalists and prize honorees. These individuals are recognized for their breakthrough achievements in advancing Earth and space science and their outstanding contributions and service to the scientific community.
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Missed last week's issue? See which articles your colleagues read most.

    Caltech-led team develops a geothermometer for methane formation (Caltech)
Fracking flowback could pollute groundwater with heavy metals (Cornell University via ScienceDaily)
New tunable laser spectrometer measures rare methane isotopologues (Deep Carbon Observatory)
Ancient ocean currents may have changed pace and intensity of ice ages (National Science Foundation)

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


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