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September 22nd 2005  Dr. William H. Zoller University of Washington "Atmospheric Chemistry in Hawai'i: The Long-Range Transport of Dust and Pollutants across the Pacific Ocean” Public Lecture , 7:30pm Middlebury College, McCardell Bicentennial Hall, room 220. Dinner with the speaker: 5:45pm at Tully and Maries, Middlbury Bill Zoller grew up in Alaska during the 1950's and 60's. He graduated in chemistry from the University of Alaska in 1965 and went to graduate school at the Massachusetts Institute of Technology where he studied nuclear chemistry and graduated in 1969 with a Ph.D. He became an Assistant Professor of Chemistry at the University of Maryland in 1970 after a brief post doc at the University of Hawaii. He became a Full Professor in 1969 at Maryland, and while there published numerous research papers and led research programs in urban air pollution, volcanic chemistry, and atmospheric chemistry in Antartica. He used Instrumental Neutron Activation Analysis to measure trace elements in samples from the atmosphere and to measure the release of radioisotopes from atmospheric weapons testing and reactor accidents, such as Chernobyl in the former Soviet Union. Abstract: Atmospheric Aerosol samples were collect at the Mauna Loa Meteorological Observatory on the Big Island of Hawaii from 1979-1992. These filter samples were collected only during Down Slope winds allowing one to sample to Free Troposphere with minimal Island contamination. The filter samples were analyzed by Instrumental Neutron Activation Analysis for approximately 35 trace elements. The source of aerosols that were reaching the Observatory were the Queen (Na,Cl), and continental dust (Al, Fe,Sc) from the surrounding continents, and Asian dust which was one of the most dominate source for the Island. One could also measure the quantity of Island weathering that contributed to the aerosol loading. Pollutant transport from the surrounding continents could occasionally be observed, and traced backed to the source region using air mass trajectories. The combustion of Oil from the Exxon Valdez in the Gulf of Alaska was also measured in Hawaii, as the largest signal in the vanadium record over the entire collection record. Directions to the restaurant: http://www.tullyandmaries.com/ Directions to Middlebury College: http://www.middlebury.edu/about/middcampus/directions If you are interested in attending the dinner, or would like further information, please contact Beth Medeiros, greenmntacs@yahoo.com, phone: 802-770-7238 or Willem R. Leenstra, Willem.Leenstra@uvm.edu, phone: 802-656-0273. |