Annual Maps of Forests in Australia from Analyses of Microwave and Optical Images with FAO Forest Definition  

作　　者：Yuanwei Qin Xiangming Xiao Jean-Pierre Wigneron Philippe Ciais Josep G.Canadell Martin Brandt Xiaojun Li Lei Fan Xiaocui Wu Hao Tang Ralph Dubayah Russell Doughty Qing Chang Sean Crowell Bo Zheng Kevin Neal Jorge A.Celis Berrien MooreⅢ 

机构地区：[1]Department of Microbiology and Plant Biology,Center for Earth Observation and Modeling,University of Oklahoma,Norman,OK 73019,USA [2]ISPA,UMR 1391,INRA Nouvelle-Aquitaine,Bordeaux Villenave d’Ornon,France [3]Laboratoire des Sciences du Climat et de l'Environnement,LSCE/IPSL,CEA-CNRS-UVSQ,UniversitéParis-Saclay,91191 Gif-sur-Yvette,France [4]CSIRO Oceans and Atmosphere,Canberra,ACT,Australia [5]Department of Geosciences and Natural Resource Management,University of Copenhagen,Copenhagen,Denmark [6]Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station,School of Geographical Sciences,Southwest University,Chongqing 400715,China [7]Department of Geography,National University of Singapore,1 Arts Link,Kent Ridge,Singapore 117570 [8]Department of Geographical Sciences,University of Maryland,College Park,MD,USA [9]Division of Geological and Planetary Sciences,California Institute of Technology,Pasadena,CA 91125,USA [10]O’Neill School of Public and Environmental Affairs,Indiana University Bloomington,702 N Walnut Grove Ave,Bloomington,IN 47405,USA [11]College of Atmospheric and Geographic Sciences,University of Oklahoma,Norman,OK 73019,USA [12]Institute of Environment and Ecology,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

出　　处：《Journal of Remote Sensing》2021年第1期134-144,共11页国际遥感学报（英文）

基　　金：supported in part by research grants from the NASA Land-Cover and Land-Use Change program(NNX14AD78G);the NASA Geostationary Carbon Cycle Observatory(GeoCarb)Mission(GeoCarb Contract#80LARC17C0001).

摘　　要：The Australian governmental agencies reported a total of 149 million ha forest in the Food and Agriculture Organization of the United Nations(FAO)in 2010,ranking sixth in the world,which is based on a forest definition with tree height>2 meters.Here,we report a new forest cover data product that used the FAO forest definition(tree cover>10%and tree height>5 meters at observation time or mature)and was derived from microwave(Phased Array type L-band Synthetic Aperture Radar,PALSAR)and optical(Moderate Resolution Imaging Spectroradiometer,MODIS)images and validated with very high spatial resolution images,Light Detection and Ranging(LiDAR)data from the Ice,Cloud,and land Elevation Satellite(ICESat),and in situ field survey sites.The new PALSAR/MODIS forest map estimates 32 million ha of forest in 2010 over Australia.PALSAR/MODIS forest map has an overall accuracy of~95%based on the reference data derived from visual interpretation of very high spatial resolution images for forest and nonforest cover types.Compared with the canopy height and canopy coverage data derived from ICESat LiDAR strips,PALSAR/MODIS forest map has 73%of forest pixels meeting the FAO forest definition,much higher than the other four widely used forest maps(ranging from 36%to 52%).PALSAR/MODIS forest map also has a reasonable spatial consistency with the forest map from the National Vegetation Information System.This new annual map of forests in Australia could support cross-country comparison when using data from the FAO Forest Resource Assessment Reports.

关 键 词：FOREST FOREST PALSAR 

分 类 号：S71[农业科学—林学]