Development of Landsat-based annual US forest disturbance history maps (1986-2010) in support of the North American Carbon Program (NACP)

REMOTE SENSING OF ENVIRONMENT

卷:209

Article

Zhao, Feng¹  Huang, Chengquan¹  Goward, Samuel N.¹  Schleeweis, Karen^1,2  Rishmawi, Khaldoun¹  Lindsey, Mary A.¹  Denning, Elaine¹  Keddell, Louis¹  Cohen, Warren B.³  Yang, Zhiqiang³  Dungan, Jennifer L.⁴  Michaelis, Andrew⁴ 

[1] Univ Maryland, Dept Geog Sci, College Pk, MD 20740 USA

[2] US Forest Serv, Rocky Mt Res Stn, USDA, Ogden, UT 84401 USA

[3] Oregon State Univ, Dept Forest Ecosyst & Soc, Corvallis, OR 97331 USA

[4] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

关键词: CONUS;    Landsat;    Forest disturbance;    NAFD-NEX;    VCT;   

DOI  :  10.1016/j.rse.2018.02.035

来源: Elsevier

【 摘 要 】

In Phase III of the North American Forest Dynamics (NAFD) study an automatic workflow has been developed for evaluating forest disturbance history using Landsat observations. It has four major components: an automated approach for image selection and preprocessing, the vegetation change tracker (VCT) forest disturbance analysis, postprocessing, and validation. This approach has been applied to the conterminous US (CONUS) to produce a comprehensive analysis of US forest disturbance history using the NASA Earth Exchange (NEX) cloud computing system. The resultant NAFD-NEX product includes 25 annual forest disturbance maps for 1986-2010 and two time-integrated maps to provide spatial-temporal synoptic view of disturbances over this time period. These maps were derived based on 24,000 + scenes selected from 350,000 + available Landsat images at 30-m resolution, and were validated using a visual assessment of Landsat time-series images in combination with high resolution and other ancillary data sources over samples selected using a probability based sampling method. The validation revealed no major biases in the NAFD-NEX maps for disturbance events that resulted in at least 20% canopy cover loss. The average user's and producer's accuracies for the disturbance class were 53.6% and 53.3%, respectively, with the individual year's user's accuracy varying from 42.8% to 73.6% and producer's accuracy from 39.0% to 84.8% over the 25-year period. The NAFD-NEX disturbance maps are available from a web portal of the Oak Ridge National Laboratory Distributed Active Archive Center (ORNL-DAAC).

【 授权许可】

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