Code 614.4 Brown Bag Seminar

Speaker: Hank Margolis Program Leader of Fluxnet-Canada Research Network Professor of ecosystem ecology at Laval University, Quebec City, Canada Senior Visiting Scientist at NASA Goddard, UMBC-GEST Abstract Using an east-west transect that encompasses many of Canada's important ecoregions, the Fluxnet-Canada Research Network (FCRN) makes continuous, multi-year, tower-based measurements of the net exchanges of carbon (C), water, and energy from forest and peatland ecosystems. These measurements allow us to (a) examine the relationship between the inter-annual variability of C fluxes and climate, (b) examine the role of disturbance, (c) analyze the contribution of different ecosystem components to the net C flux; (d) explore the relationship between productivity and net ecosystem C exchange; and (e) evaluate ecosystem and climate models. This information is used to extrapolate the knowledge obtained from the specific flux sites in both space and time. Some of the key research results from the network will be presented. Fluxnet-Canada has developed collaborations with NASA Goddard scientists on (a) using flux tower data to evaluate the potential of MODIS ocean reflectance bands for monitoring light use efficiency of Canadian forests; (b) an analysis of the variability of carbon estimates using airborne and space lidar in Quebec; and (c) an analysis of the interannual variability of the carbon cycle for Canada using the CASA biogeochemical model. The synergies between Fluxnet-Canada and the remote sensing expertise at NASA Goddard will make a major contribution to the North American Carbon Program. Short Biosketch for the Speaker Hank Margolis is the Program Leader of the Fluxnet-Canada Research Network, a professor of ecosystem ecology at Laval University in Quebec City, Canada, and a senior visiting scientist at NASA Goddard through the UMBC-GEST program. He was previously the scientific director of the Canadian university participation in the Boreal Ecosystem Atmosphere Study (BOREAS).