Earth & Environment Graduate Student Seminar Series - Ann Dunlea & Nicoletta Leonardi

3:30 pm on Friday, April 25, 2014
5:30 pm on Friday, April 25, 2014
STO 453
Ann Dunlea and Nicolette Leonardi will be giving talks as part of the Graduate Student Seminar Series in the Department of Earth & Environment. Refreshments will be served following the talks. "Paleoceanography of the South Pacific Gyre” by Ann Dunlea The South Pacific Gyre (SPG) is Earth's largest oceanic desert due to its low levels of biological productivity. It also has the slowest sedimentation rates of the global ocean. The geochemistry of SPG sediment provides clues to large-scale changes in this vast ocean region and surrounding continents throughout the past 100 million years, including the formation of Australia's deserts, Southern Hemisphere volcanism, and the opening of major oceanic gateways. "How waves shape salt marshes” by Nicoletta Leonardi We used cellular automata simulations and high resolution field measurements of five sites along the United States Atlantic Coast to investigate the erosion of marsh boundaries by waves. Our results justify the unpredictability of erosion events and the possibility of large failures episodes of marsh boundaries despite of a low exposure to wave action.