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geochemistry

New measurements help researchers assess methane emitted by wetlands
Posted inResearch Spotlights

What’s the Average Methane Isotope Signature in Arctic Wetlands?

by Terri Cook 4 May 20173 March 2023

Aircraft measurements confirm that methane emissions from northern European wetlands exhibit a uniform regional carbon isotopic signature, despite considerable ground-level heterogeneity.

Gerald Wasserburg in front of the Lunatic I mass spectrometer with the Allende meteorite and a lunar rock on the table beside him
Posted inNews

Gerald J. Wasserburg (1927–2016)

by S. B. Jacobsen, D. A. Papanastassiou and D. J. DePaolo 3 May 201727 January 2022

A leading geochemist who became well known for creating the first high-precision mass spectrometer, called Lunatic I, that measured isotope ratios in lunar samples from the Apollo missions.

Sendai Airport following magnitude 9.0 earthquake and tsunami in March 2011.
Posted inNews

Tsunamis Leave a Telltale Chemical Trail

Katherine Kornei, Science Writer by Katherine Kornei 12 January 201717 October 2022

Researchers follow a trail of organic compounds in soil that reveals the 2011 Tohoku tsunami's path over the Japanese coastline, providing clues to how often tsunamis recur and where they travel.

Posted inEditors' Vox

Measurements and Models of Reactive Transport in Geological Media

by B. Berkowitz 27 December 201622 December 2021

Author Brian Berkowitz answers questions about his recently published article and the scientific and societal implications of his findings.

Posted inAGU News

Alex Halliday Receives 2016 Harry H. Hess Medal

by AGU 23 December 201621 April 2023

Alex Halliday was awarded the 2016 Harry H. Hess Medal at the American Geophysical Union Fall Meeting Honors Ceremony, held on 14 December 2016 in San Francisco, Calif. The medal is for "outstanding achievements in research on the constitution and evolution of the Earth and other planets."

Nonglacial upland surface in the mountains of northern Sweden.
Posted inScience Updates

Deciphering the Cosmogenic Code to Learn Earth's Surface History

by A. P. Stroeven, D. Fink and M. Caffee 28 November 201623 March 2023

Third Nordic Workshop on Cosmogenic Nuclide Techniques; Stockholm, Sweden, 8–10 June 2016

Posted inResearch Spotlights

Tracing the North Atlantic's Bottom Waters

by Terri Cook 16 November 20163 June 2024

Chemicals released by two European nuclear fuel reprocessing plants, along with certain chlorofluorocarbons, are helping to constrain the speed and behavior of North Atlantic deep-ocean circulation.

Posted inAGU News

Canil and Elliott Receive 2016 N. L. Bowen Award

by AGU 2 November 201622 September 2022

Dante Canil and Tim Elliott will receive the 2016 N. L. Bowen Award at the 2016 American Geophysical Union Fall Meeting, to be held 12–16 December in San Francisco, Calif. The award recognizes "outstanding contributions to volcanology, geochemistry, or petrology."

Photo of a polluted city in China. Air pollution causes one out of eight deaths globally, according to the World Health Organization.
Posted inNews

Atmospheric Chemists Should Tackle Risks to Society, Report Says

by Randy Showstack 9 September 201624 February 2023

Protecting public health and the health of the climate and ecosystems warrants more focus from this scientific field, according to the report.

Phytoplankton blooms help to cycle nitrate in the Southern Ocean.
Posted inResearch Spotlights

A New Mechanism for Nitrogen Cycling in the Southern Ocean

Sarah Stanley, Science Writer by Sarah Stanley 29 July 201617 August 2022

A nitrite-oxidizing enzyme may work in reverse for some microbes in the Antarctic autumn.

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