Retrieval of forest biomass from ALOS PALSAR data using a lookup table method
文献类型：EI期刊论文
| 作者 | Ni Wenjian ; Sun Guoqing ; Guo Zhifeng ; Zhang Zhiyu ; He Yating ; Huang Wenli |
| 发表日期 | 2013 |
| 关键词 | Biomass Climate change Estimation Forestry Models Profilometry Radar Statistical tests Table lookup Three dimensional |
| 英文摘要 | Mapping of forest biomass over large area and in higher accuracy becomes more and more important for researches on global carbon cycle and climate change. The feasibility and problems of forest biomass estimations based on lookup table (LUT) methods using ALOS PALSAR data are investigated in this study. Using of the forest structures from a forest growth model as inputs to a three dimensional radar backscattering model, a lookup table is built. Two types of searching methods (Nearest Distance (ND) and Distance Threshold (DT)) are used to find solutions from lookup table. When a simulated dataset is used to test the lookup table, the RMSE of biomass estimation are 39.133 Mg/ha (R 2= 0.748) from ND and 26.699 Mg/ha (R2 = 0.886) from DT using dual-polarization data for forest with medium rough soil surface. All results show that DT is superior to ND. Comparisons of biomass from forest inventory data with that inversed from look up table using DT method over eight forest farms shows RMSE of 18.564 Mg/ha and 15.392 Mg/ha from PALSAR data with and without correction of the scattering mechanism, respectively. For the entire Lushuihe forest Bureau, the errors of the biomass estimation are - 13.8 Mg/ha ({-} 8.6%) and - 5.5 Mg/ha (- 3.5%) using PALSAR data with and without correction of scattering mechanisms due to terrain, respectively. The results shows that the radar image corrected data could be directly used for biomass estimation using the lookup table method. 2008-2012 IEEE. |
| 出处 | Ieee Journal of Selected Topics in Applied Earth Observations and Remote Sensing
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| 卷 | 6期:2页:875-886 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/31185]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Ni Wenjian,Sun Guoqing,Guo Zhifeng,et al. Retrieval of forest biomass from ALOS PALSAR data using a lookup table method. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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