A team of researchers with members from Princeton University, the University of Maine and Oregon State University has found that greenhouse gasses a million years ago, were only slightly higher than they were between 450,000 and 800,000 years ago. In their paper published in "Proceedings of the National Academy of Sciences," the team describes their study of the newly retrieved ice cores and how it is helping to better understand the changes to the Earth's ice ages.
2015 Spitzer Lecture - Professor Nicolas Dauphas, Dept. of the Geophysical Sciences and Enrico Fermi Institute, University of Chicago. Meteorites, which are remnants of solar system formation, provide a direct glimpse into the dynamics and evolution of a young stellar object, namely our Sun.
A whiff of air frozen in ice for 1 million years provides a new snapshot of Earth's ancestral climate. "Gas bubbles are the gold standard for reconstructing climate," said lead study author John Higgins, a geochemist at Princeton University. (DOI:10.1073/pnas.1420232112)
Deforestation is believed to cause drier and warmer conditions because of a decrease in tree cover. However, a counterintuitive effect of increase in cloudiness and rain due to deforestation has been found by Khanna and Medvigy in Rondônia, a state in west central Brazil, which was once covered by over 50 million acres of Amazonian rainforests, half of which has been replaced by pasture.
There is now no doubt that Antarctica’s ice sheet is melting – and the melting is accelerating. Res. Sch. Christopher Harig and Prof. Frederik Simons say this could become a “runaway problem”, ultimately raising global sea levels by 6m or more.
About three million years ago so much of Antarctica melted that, according to some studies, all that extra water pushed the oceans about 17 metres higher. So understanding Antarctica and its smaller polar opposite in Greenland has gigantonourmously big implications for the future. Two studies last week looked at Antarctica and suggest the giant is probably already awake. The first study was further confirmation that the melting of the West Antarctic ice sheet is accelerating.
The world’s most powerful internal ocean waves were modeled in a new study published today in Nature by a research team that includes Sonya Legg, a Princeton senior research oceanographer in the Program in Atmospheric and Oceanic Sciences and a lecturer in geosciences.
GEO graduate student Nick Peng invites you to attend the spring recital of the Princeton University Chinese Music Ensemble (ChiME) in the Forbes College Living Room at 1 p.m. on Sunday, May 10.
Dusenbury Professor of Geological and Geophysical Sciences Daniel Sigman has been recognized for excellence in Graduate Student Mentoring.
During the past decade, Antarctica's massive ice sheet lost twice the amount of ice in its western portion compared with what it accumulated in the east, according to Princeton University researchers (Prof. Frederik Simons and Res. Sch. Christopher Harig) who came to one overall conclusion — the southern continent's ice cap is melting ever faster.