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    Author(s): Kenneth MacDicken; Erik Lidquist
    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. 17
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (140.95 KB)

    Description

    Global interest in forest degradation is widespread – but is fraught with widely differing views. Forest degradation by one definition may be sustainable forest management by another. The Global Forest Resources Assessment, conducted by FAO every five years, is working to find an approach to a global estimation of forest area that can address these differing views. This approach is based on the use of MODIS VCS satellite data to evaluate significant forest canopy reduction over a ten year time span. Significance in this case will be calculated as a threshold (most likely 20%) reduction in canopy area at the pixel scale. The reduction in forest canopy area may or may not be seen as degradation – depending on the values of the data user.

    This analysis will be completed during 2013 for use in FRA 2015 and will provide summaries of reduced forest area globally, regionally and by ecological zone. Country representatives will be provided with data from the initial analysis done by FAO so that they can review and revise as needed. A tier system will be used as part of FRA 2015 to describe the overall level of each variable – including the reduced forest canopy area. While not a report of forest degradation directly, it is intended to be a proxy that can provide at least some indication of the area of forest in which human activities have resulted in reduced canopy density forest.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    MacDicken, Kenneth; Lidquist, Erik. 2013. Measuring global canopy reduction: A forest degradation proxy for FRA2015. 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. 17.

    Keywords

    forest degradation monitoring, Southeast Asia, climate change, carbon

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