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TitleSpatial and Inter-annual Variability of Canada's Net Primary Productivity Based on Satellite Imagery
DownloadDownloads (Preprint)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorChen, J M; Liu, J; Cihlar, J
SourceSecond International Conference on Geospatial Information in Agriculture and Forestry, Lake Buena Vista, Florida, 10-12 January; 2000., Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20042799
Mediapaper; on-line; digital
File formatpdf
Released2000 01 01
AbstractThe Boreal Ecosystems Productivity Simulator (BEPS) developed at the Canada Centre for Remote Sensing (Liu et al., 1997, Remote Sensing of Environment, 62:158-175) has been further refined and applied to the whole Canada's landmass for multiple years from 1994 to 1996. The data used in the computation include leaf area index (every 10 days) and land cover type (annually) from measurements of the Advanced Very High Resolution Radiometer (AVHRR) at 1 km resolution, daily meteorological data (radiation, precipitation, temperature and humidity) and soil water holding capacity. Annual NPP calculations from BEPS in 1994 are compared with ground biomass data in Quebec, and the components (radiation interception, photosynthesis, respiration, rainfall interception, etc.) of the model are validated with data from the Boreal Ecosystem-Atmosphere Study (BOREAS). A new method for daily NPP calculation is developed through an analytical temporal integration of Farquhar's model. An innovative way of validating daily NPP calculation using two-level CO2 flux measurements will be described. In this presentation, the spatial distribution of NPP in Canada will be shown, and the inter-annual variation will be analyzed against satellite and climate data.

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