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    Author(s): William Salas; Steve Hagen
    Date: 2013
    Source: In: Mortenson, Leif A.; Halperin, James J.; Manley, Patricia N.; Turner, Rich L., eds. Proceedings of the international workshop on monitoring forest degradation in Southeast Asia. Gen. Tech. Rep. PSW-GTR-246. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: p. 33
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (172.21 KB)

    Description

    This presentation will provide an overview of an approach for quantifying uncertainty in spatial estimates of carbon emission from land use change. We generate uncertainty bounds around our final emissions estimate using a randomized, Monte Carlo (MC)-style sampling technique. This approach allows us to combine uncertainty from different sources without making assumptions about the distribution of the underlying data. We incorporate uncertainty from the following components: Estimates of forest loss; Estimates of aboveground biomass; and Estimates of belowground biomass. In each scenario of the MC simulation, forested pixels (1-km) within each 18.5-km block (the scale of MODIS-derived deforestation data) are selected randomly until the total cleared area estimated within the block is reached. Carbon stock information for the cleared pixels is then used to calculate an emissions estimate associated with forest loss for that scenario. Iterating through scenarios for each block results in a distribution of emissions associated with the estimated level of forest loss. This distribution is then used to define uncertainty based on a set confidence level.

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    Citation

    Salas, William; Hagen, Steve. 2013. Application of a Monte Carlo framework with bootstrapping for quantification of uncertainty in baseline map of carbon emissions from deforestation in Tropical Regions In: Mortenson, Leif A.; Halperin, James J.; Manley, Patricia N.; Turner, Rich L., eds. Proceedings of the international workshop on monitoring forest degradation in Southeast Asia. Gen. Tech. Rep. PSW-GTR-246. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: p. 33

    Keywords

    forest degradation monitoring, Southeast Asia, climate change, carbon

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