Much has been made recently about the rift between Louisiana officials and scientists over the prudency of building coastal sand berms as a defensive measure against the Gulf oil spill. Among members of the science community there is no such division, says Torbjörn Törnqvist, professor of earth and environmental sciences.
Earth was just coming out of an ice age 9,300 years ago when a cataclysmic event occurred that plunged the planet into a cold “snap” that lasted for centuries. Scientists have suspected that water melted from snow and ice introduced into the North Atlantic Ocean was the cause — but the source and volume were a mystery. A new study led by Tulane researcher Shiyong Yu pinpoints the source.
This decade has started off with a bang — massive earthquakes in Haiti, Chile and China, a still-erupting volcano in Iceland and its neighboring volcano that some scientists speculate may erupt in the near future. Are these geologic events linked in some way, and should we be concerned that they are occurring more frequently?
Dr. Stephen Nelson has conducted over 250 field trips to sites of major levee breaches in New Orleans. Five years after hurricane Katrina, his field trips are still extremely popular to visitors.
Austin Nijhuis (Tulane '11) is traveling to England this summer to do coastal restoration research. The project, entitled, Quantifying wetland accretion rates in the Mississippi Delta using recent crevasse-splay deposits as natural analogs for river diversions, brings Austin to the University of Liverpool with Postdoc Zhixiong Shen.
Dr. Torbjörn Törnqvist, Dr. Zhixiong Shen, Jennifer Kuykendall, Jonathan Marshak, Austin Nijhuis and Dr. Zhen Li (visiting from East China Normal University) conducted fieldwork near Napoleonville, Louisiana during Spring Break of 2010 to study the stratigraphy of crevasse-splay deposits that were formed when Bayou Lafourche, a former Mississippi River channel, breached its natural levee.
Ph.D. graduate student, Kimberly Roe, embarked to Antarctica in January 2010 as part of a complex interdisciplinary Antarctic expedition, funded by the National Science Foundation (NSF).
Dr. Nicole Gasparini, Andy Menking, and Connor O’Malley (Colorado State University) conducted field work in the North Kohala region of the Big Island of Hawaii during the month of January.
Brad Rosenheim, assistant professor of earth and environmental sciences at Tulane, is pursuing two studies funded by the National Science Foundation using advanced carbon-dating techniques. One study uses radiocarbon records stored in corals and sponges from several sites in the tropical North Atlantic to look backward at how ocean currents have changed over time.
Arsenic and Old Lace fans beware: you won't be able to guess "whodunit" in this mystery of arsenic poisoning. Karen Johannesson, professor of earth and environmental sciences at Tulane, one of the "detectives" on the case, says the situation is too complicated for easy answers.
Output from stacking model used to study parameters controlling stratigraphic architecture of channelized sedimentary deposits. Controls on stratigraphic architecture are explored using 2D basins which are filled by discrete triangular depositional elements which are meant to represent channel or lobe deposits.
It is with anticipation that I will be leaving the department by the end of this month and joining Department of Earth Sciences, Nanjing University, China as a faculty member.
Dr. Stephen A. Nelson, Associate Professor in the Department of Earth and Environmental Sciences, received the Outstanding Educator Award at the 59th annual convention of the Gulf Coast Association of Geological Societies.
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