A global scale analysis of the spatiotemporal distribution of foliar biomass for 1988 Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/v405sg32z

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  • Many ecological systems follow a seasonal cycle affecting primary production,carbon flux, and vegetative gas emissions. The seasonal variation of ecologicalsystems are both affected by and have effects upon climatic factors. A quantitativeestimate of the seasonal variation of vegetation is required to characterize ecologicalsystems and their interaction with climate. Monitoring the spaliotemporalvariation of foliar biomass density (FBD) over one year will provide a quantitativeestimate of the annual cycle and regional variation of photosynthetic activity. FBDis a quantitative measure of leafy material per unit of area produced by photosyntheticallyactive vegetation. This seasonal variation in FBD is an important parameterfor global and other large scale investigations of ecological, hydrological, andbiogeochemical systems which require data and expertise from a variety of sourcesand disciplines. Therefore, FBD is potentially of great utility for ecologists,hydrologists, climatologists, and atmospheric scientists.Recent regional scale investigations of ecological systems concluded that therepetitive coverage and synoptic view of remotely sensed measurements providedata to monitor the seasonal variation of biomass. A method to estimate the seasonalvariation of FBD at global scales has not been developed. The objective ofthis research is to develop a methodology that could be used to estimate theseasonal variation of FBD for the entire terrestrial biosphere. By coupling globalsatellite data, measured field data, and a vegetation classification, a model wasdeveloped to estimate the global spatiotemporal variation of FBD.Comparisons between literature estimates of FBD and estimated FBD fromthis model were made as a means of validation. A more specific comparison wasconducted between grasslands based on work conducted in the Senegalese Sahelregion in Africa. Finally, a sensitivity analysis was performed to characterize thepotential propagation of error associated with the literature FBD estimates used todrive this model.
  • Many ecological systems follow a seasonal cycle affecting primary production
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  • File scanned at 300 ppi (Monochrome, 256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-03-01T17:56:47Z (GMT) No. of bitstreams: 1 ProssDerekD1992.pdf: 11475651 bytes, checksum: 835978a8f2c5b6fa7b226b991a1b45b2 (MD5)
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-02-07T17:11:19Z (GMT) No. of bitstreams: 1 ProssDerekD1992.pdf: 11475651 bytes, checksum: 835978a8f2c5b6fa7b226b991a1b45b2 (MD5)
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