Postdoctoral Research - Oxygen Isotopes and Tree Canopy Temperatures University of Pennsylvania
Posted May 5, 2010
Oxygen Isotopes and Tree Canopy Temperatures. We seek a plant eco-physiologist or an earth-system scientist for an NSF-funded Postdoctoral Research position at the University of Pennsylvania. The research will test the concept that tree-canopy leaf temperature can be resolved through the oxygen isotope ratio of tree-ring cellulose and subsequently examine the relationships between canopy temperature, energy inputs and carbon gain. Results from this work will give us insight into tree physiological responses to climate and weather and allow us to determine future changes in tree distribution and productivity in a dynamic world. The position involves setting up canopy IR temperature sensors and analyzing oxygen isotopes of tree-ring cellulose at eddy-flux sites in cool temperate, warm temperate and sub-alpine forested systems. There will also be opportunities to participate in other ongoing projects (including tree-ring projects in Mongolia) and/or to develop complementary projects of your own interest. The successful applicant will have a Ph.D., plus expertise in plant/ecosystem energy balance, plant physiology, electronic instrumentation (e.g. Li-Cor 6400, Campbell dataloggers), and/or stable isotope analysis. Knowledge of eddy flux theory/practice or process modeling would be a bonus. The position is available for up to 3 yrs with annual renewal dependent on satisfactory performance. For more information and/or to apply, please contact Dr. Brent Helliker ( Applications should include a CV, a short statement of research interests and expertise, and names, addresses, phone numbers, and email addresses of three references. Application review begins 5/30/10, continuing until the position is filled. The start date is negotiable.


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