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Monday, October 10, 2011
4:00 PM - 5:00 PM
Arms 155 (Robert P. Sharp Lecture Hall)

Geological and Planetary Sciences Seminar

The Sources and Cycling of Organic Matter in a Changing Arctic Ocean: Patterns, Proxies and Processes
H. Rodger Harvey, professor and chair, Department of Ocean, Earth and Atmospheric Sciences, Old Dominion University,
Speaker's Bio:
H. Rodger Harvey is Professor and Chair of Organic Geochemistry in the Department of Ocean, Earth and Atmospheric Sciences at Old Dominion University. He received his BS degree from Virginia Tech and Ph.D. in Environmental Microbiology from the University of Georgia. This followed with three years as a postdoctoral fellow at the University of Bristol, UK and two decades at the University of Maryland Center for Environmental Sciences before assuming duties at ODU in 2011. RodgerÂ’s research program in chemical ecology and organic geochemistry uses a variety of molecular level tracers to study organic carbon cycling, carbon sequestration and questions of ecosystem responses to climate change. Over the past decade Rodger and his students have focused on the Arctic Ocean and Bering Sea to understand the dynamics of carbon cycling and its impact on ecosystem function, trophic interactions, and climate change. He is co-chair of the Scientific Advisory Board for the 5 year Bering Sea Ecosystem Study Program which has linked 43 projects and 93 investigators across multiple federal (NSF/NOAA) and private agencies to understand the impact of changing climate on the Bering Sea Ecosystem, its fisheries and the native people who depend on it. Prof. Harvey is past President of the Organic Geochemistry division of the Geochemical Society with peer reviewed scientific publications covering a range of disciplines from environmental chemistry to fisheries biochemistry. He serves on the editorial board of the journal Geochemica et Cosmochemica Acta and as special topics editor for Organic Geochemistry and Deep Sea Research. He teaches courses in environmental geochemistry, chemical oceanography and climate science. Dr. Harvey has been the recipient of a Fulbright Senior Scholar Award for Research and in 2009 received the University System of Maryland Regents Faculty award for Research, Scholarship and Creativity Activity.
With a variety of inputs, intense physical processes and observable changes over decadal time scales, the Arctic Ocean serves an ideal system to examine the relationship between carbon cycling and climate and promises to be an important system to understand in the future. We have used a variety of molecular organic markers to define the sources of organic carbon to the system and follow the interaction between organic matter and the microbial catalysts that dictate its preservation in modern and older sediments. We have also observed specific tracers of organisms previously thought to be absent in the system (e.g. cyanobacteria) which may reflect the changing climate. This seminar will explore the use of molecular organic markers and what they can tell us about changing polar oceans.
For more information, please contact Liz Boyd by phone at 626-395-6070 or by email at miura@gps.caltech.edu.