TITLE: On Thin Ice: Changing Ice Cover on Polar Oceans
SPEAKER: Thorsten Markus
EVENT DATE: 2009/11/17
RUNNING TIME: 65 minutes
NASA scientist Thorsten Markus shares his expertise on polar ice in a lecture at the Library of Congress. In his lecture, Markus summarizes recent observations and findings-together with pictures from Arctic and Antarctic research campaigns-and puts those results into the bigger climate-system picture. He focuses on recent changes in the Arctic and in Antarctica. Markus explains why the two hemispheres react differently to climate change, and concludes his lecture by discussing current and future efforts to address the uncertainties and contradictions of the ice conditions.
Speaker Biography: Thorsten Markus is head of the Cryospheric Sciences Branch at NASA Goddard Space Flight Center. He has closely observed the changes in the polar sea-ice cover, sometimes doing field work directly on the ice or from a NASA airplane and other times via satellite remote sensing. In November 2009, Markus was the principal sea-ice investigator on NASA's DC-8 plane that flew over Antarctica as part of Operation IceBridge. For more information, visit http://blogs.nasa.gov/cm/blog/icebridge . Markus also is the project scientist for NASA's upcoming ICESat-2 Mission, scheduled to be launched in 2015. Markus joined NASA after receiving his doctorate in physics from the University of Bremen, Germany, in 1995.