Mark Brenner, University of Florida, "Climate Variability and Human Disturbance in the Lowland Neotropics Over the Past 85,000 Years"
Time:
12:00pm - 1:00pm
Location:
HGS 176
Description:
Christopher Wolfe, Scripps/UCSD, "The Adiabatic Pole-to-Pole Overturning Circulation and the Formation of Deep Stratification"
Time:
3:00pm - 4:00pm
Location:
HGS 101
Description:
Tanja Bosak, Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, "The Meaning of Stromatolites"
Time:
3:30pm - 4:30pm
Location:
HGS 101
Description:
Shane Keating, New York University, "Models and Measures of Mixing in the Ocean"
Time:
3:30pm - 4:30pm
Location:
HGS 101
Description:
Ross Tulloch, MIT, "The Role of Eddies in Ocean Circulation"
Time:
3:00pm - 4:00pm
Location:
HGS 101
Description:
H.J. Melosh, Department of Earth and Atmospheric Sciences, Purdue University, "Tiny Worlds of Ice and Grit: Results from NASA's most Recent Comet Missions"
Abstract: NASA’s most recent successes in exploring new worlds took place on November 4, 2010 and February 14, 2011 when two spacecraft made close passes by comets Hartley 2 and Tempel 1. Although small, Hartley 2 turned out to be a feisty customer, blasting huge quantities of CO2 gas and water vapor into space, along with dust and tarlike organic material. Images from the spacecraft show an elongated nucleus about 2.0 km long, shaped like a peanut. It is divided into two major lobes separated by a smooth collar. The lobes are sources of powerful jets of gas and dust that loft chunks of material into space. Its surface is pitted, ridged and littered with blocks of ice and dust tens of meters in diameter. Tempel 1, the target of the Deep Impact collision in 2005, is much larger, seems to lack clumps of material and appears to be composed of a fine, weak powder. It nevertheless possesses a complex geologic history, with layers, crater-like depressions and what appear to be several "volcanic" flow deposits. In this presentation I will show images of these comet's surfaces and discuss what these observations mean, so far as we currently understand them. Many of the observed phenomena, such as the jets of gas and dust, defy current understanding of how gas and dust interact in a vacuum under low gravity. The ices present in the comets are yielding important clues to conditions in the nebula from which the comets, and our own planet, originally formed.
Time:
3:00pm - 4:00pm
Location:
HGS 101
Description:
Andrew Mahon, Central Michigan University, "Development and Adoption of DNA-Based Tools for Monitoring Rare Species in Aquatic Environments: A Case Study with Asian Carp"
3pm» Seminar, Mark Brenner, University of Florida, "Climate Variability and Human Dis...