HR: 11:05h
AN: U32A-04 INVITED    [Abstracts]
TI: Global Terrestrial Carbon Observations: Looking 30 Years Back and Maybe 20 Years Forward
AU: * Running, S W
EM: swr@ntsg.umt.edu
AF: University of Montana, Dept of Ecosystem Sciences, Missoula, MT 59812, United States
AB: Global terrestrial observations have of necessity followed the evolution of polar orbiting satellite technology, and secondarily the computer revolution. The first real measurement of a global terrestrial carbon component was the AVHRR Normalized Difference Vegetation Index record, beginning in 1980. By the mid-1980s the NDVI was being used, with simple global climate statistics to estimate global net primary productivity. The era of the Earth Observing System began in the early 1990s, and featured both better satellite technology and algorithm teams tasked with developing sequential processing code to transform raw observed radiances thru spectral reflectances to biophysical variables such as leaf area index, fraction absorbed photosynthetically active radiation, evapotranspiration and net primary production. EOS datasets now provide a continuous global record of these variables from 2000 – present, with regular validations done from the global array of carbon, water and energy flux tower sites. Future directions will deploy imaging spectrometers, lidar, passive and active microwave sensors and geostationary platforms to enhance global terrestrial carbon monitoring, and more sophisticated algorithm development and parameterization from ground measurement site networks such as Fluxnet.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0428 Carbon cycling (4806)
DE: 1615 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912)
SC: Union [U]
MN: 2007 Fall Meeting