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A Princeton geologist Gerta Keller has endured decades of ridicule for arguing that the fifth extinction was caused not by an asteroid but by a series of colossal volcanic eruptions. But she’s reopened that debate.
On April 12, 2018, Princeton Prof. Frederik J. Simons and graduate students Joel D. Simon and Alex Burky, along with their international collaborators, boarded the Fukae Maru for a two-day training cruise. The goal of the cruise, led by Kobe University Prof. Hiroko Sugioka and JAMSTEC scientist Dr. Masayuki Obayashi, was to learn instrument deployment and data recovery procedures for the newest-generation MERMAID float.
The oceans are the planet’s most important depository for atmospheric carbon dioxide on time scales of decades to millenia. But the process of locking away greenhouse gas is weakened by activity of the Southern Ocean, so an increase in its activity could explain the mysterious warmth of the past 11,000 years, an international team of researchers reports.
By applying new data and Princeton’s supercomputers to the classic question of what lies beneath our feet, Princeton seismologist Jessica Irving and an international team of colleagues have developed a new model for the Earth’s outer core, a liquid iron region deep in the Earth.
A new display consisting of a collection of 30 fine minerals has been unveiled in the Alexander H. Phillips Mineral Gallery in Guyot Hall.
Laure Resplandy, an assistant professor of geosciences and the Princeton Environmental Institute led study in "Nature Geoscience" examined the global carbon cycle and suggests that scientists may have misgauged how carbon is distributed around the world, particularly between the northern and southern hemispheres. The results could change projections of how, when and where the currently massive levels of atmospheric carbon will result in environmental changes such as ocean acidification.
Some scientists think that during several ancient episodes, the planet plunged into a deep freeze known as “Snowball Earth,” when ice sheets grew to cover almost the entire planet.  Analysis from Geosciences Ph.D. student Scott Maclennan and advisers supports that newly discovered rock sequence from Ethiopia confirms a Snowball Earth event some 717 million years ago and suggests it took place in mere thousands of years—the geologic equivalent of of a cold snap.
GEO Senior Emily Geyman, a PEI Environmental Scholar under the direction of Prof. Adam Maloof, has received continued funding for her project based in The Bahamas, "How Do Carbonates Record Sea Level and Seawater Chemistry?"
Congratulations to the Class of 2018 and to our 2017/18 Ph.D. Recipients.
Alec Getraer '19 Wins Gold Award at Research Day 2018 for his poster titled "Centimeter Scale River Network Organization." Princeton Research Day is a celebration of the research and creative endeavors by students and non-faculty researchers at Princeton. Read more: