HR: 17:45h
AN: G54A-08 INVITED    [Abstracts]
TI: Estimation of Carbon Stocks, Fluxes and Dynamics using Lidar and Ecosystem Models
AU: * Dubayah, R
EM: dubayah@umd.edu
AF: AU: Hurtt, G
EM: george.hurtt@unh.edu
AF: George Hurtt, Deparment of Natural Resources University of New Hampshire, Durham, NH 03824, United States
AB: The recent National Research Council Decadal Survey highlighted the importance of near-term (next 5 years) measurements of vegetation 3-D structure for answering pressing questions about carbon cycle science and ecosystem function. The Survey strongly recommended the use of lidar observations to obtain these data, either from a modified ice sheet lidar altimetry mission (ICESAT II), or a joint interferometric SAR mission focused on earth surface deformation, ecosytem dynamics and ice (DESDynI), with launches in the 2010-2013 time frame. In this talk we present an overview of ecosystem modeling using vegetatation structure from lidar to help inform science and measurement requirements for the DESDynI mission. We begin with a brief background of the height-structured Ecosystem Demography model. We then illustrate how this model is initialized using remotely- sensed structure to greatly improve spatial estimates of carbon stocks and fluxes, using examples from various biomes. The importance of capturing the temporal dynamics of ecosystem structure and its effects on model outputs is shown using time-series of lidar-derived vegetation structure. Lastly, we discuss the potential implications of our research for the DESDynI mission.
DE: 0410 Biodiversity
DE: 0428 Carbon cycling (4806)
DE: 0466 Modeling
DE: 0480 Remote sensing
SC: Geodesy [G]
MN: 2007 Fall Meeting