The potential of L-band SAR for quantifying mangrove characteristics and change: case studies from the tropics

被引:116
作者
Lucas, Richard M. [1 ]
Mitchell, Anthea L.
Rosenqvist, Ake
Proisy, Christophe
Melius, Alex
Ticehurst, Catherine
机构
[1] Univ Coll Wales, Inst Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales
[2] Univ New S Wales, Sch Biol Earth & Environm Sci, Kensington, NSW 2033, Australia
[3] Japan Aerosp Explorat Agcy, Chuo Ku, Tokyo, Japan
[4] UMR AMAP, Inst Rech Dev, Cayenne, French Guiana
[5] Ctr Etud Environm Terrestres & Planetaires, Velizy Villacoublay, France
[6] CSIRO Land & Water, Black Mt Labs, Canberra, ACT, Australia
关键词
mangroves; tropics; radar remote sensing; change detection;
D O I
10.1002/aqc.833
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
1. The Japan Aerospace Exploration Agency's (JAXA) Advanced Land Observing Satellite (ALOS) L-band Phased Array Synthetic Aperture Radar (PALSAR), launched successfully in January 2006, will provide new data sets for coastal ecosystems mapping and change monitoring at local to global scales. 2. To evaluate L-band capability for mangrove applications, data acquired by the NASA airborne SAR (AIRSAR) and Japanese Earth Resources Satellite (JERS-1 SAR) over sites in Australia, French Guiana and Malaysia were used to demonstrate benefits for mapping extent and zones, retrieving biomass and structural attributes (e.g. height), and detecting change. 3. The research indicates that mapping is most effective where mangroves border non-forested areas and where differences in structure, as a function of species, growth stage and biomass distributions, occur between zones. 4. Using L-band SAR, biomass can be retrieved up to similar to 100-140 Mg ha(-1) although retrieval is complicated by a noticeable decrease in L-band backscattering coefficient within higher (similar to > 200 Mg ha(-1)) biomass stands, particularly those with extensive prop root systems. 5. Change detection through multi-temporal comparison of data proved useful for mapping deforestation/regeneration and mangrove dynamics associated with changing patterns of sedimentation. 6. The research highlights the likely benefits and limitations of using ALOS PALSAR data and supports JAXA's Kyoto & Carbon (K&C) Initiative in promoting the use of these data for regional mangrove assessment. Copyright (c) 2007 John Wiley & Sons, Ltd.
引用
收藏
页码:245 / 264
页数:20
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