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2011_0728_IGARSS2011_Motohka.ppt
- 1. Relationships between PALSAR backscattering data and forest above ground biomass in Japan ○ Takeshi Motohka (Japan Aerospace Exploration Agency) 2011/07/28: IGARSS 2011, Vancouver, Canada. Masanobu Shimada (Japan Aerospace Exploration Agency) Osamu Isoguchi (Remote Sensing Technology Center of Japan) Masae I. Ishihara (Japan Wildlife Research Center) Satoshi N. Suzuki (Japan Wildlife Research Center)
- 8. Deciduous broadleaf forest (Tomakomai, Hokkaido) Evergreen coniferous forest (Otanomousu-daira, Nagano) Deciduous broadleaf forest (Chichibu, Saitama) Evergreen broadleaf forest (Yona, Okinawa)
- 10. Tree diameter of breast height [cm] (DBH) Dry weight [kg] measured all trees in about 1 ha plot except for DBH < about 5 cm. Allometric equations for each specie Ʃ (dry weight) / stand-size Biomass [t/ha] Processing of tree census data
- 11. Statistics of the forest stands (n=44) DBH: Diameter at Breast Height
- 12. PALSAR yearly mosaic R: HH G: HV B: HH/HV Year: 2007, 2009 Mode ： Fine beam dual (HH, HV) Mosaicking period ： Jun. - Sep. Pixel sampling ： 10 m Orbit: Ascending
- 14. Saturation level : - dy/dx = 0.01 … 91 [t/ha] - dy/dx = 0.005 … 182 [t/ha] HV RMSE : 0.703 [dB] PALSAR γ 0 vs. biomass
- 15. Saturation level : - dy/dx = 0.01 … 68 [t/ha] - dy/dx = 0.005 … 136 [t/ha] PALSAR γ 0 vs. biomass RMSE : 1.053 [dB] HH
- 16. Red ●: After correction Green +: Before correction RMSE : 1.053 [dB] RMSE 0.703 [dB] RMSE : 2.312 [dB] RMSE 2.073 [dB] Effect of slope-correction
- 17. HV HH Precipitation vs. PALSAR gamma naught rainfall (over 10mm during 3 days before obs.) RMSE: HH : 0.670 dB HV : 0.402 dB Mean bias between rainy and non-rainy data: HH : +0.177 dB HV : +0.044 dB
- 18. Inversion of forest biomass RMSE: 106.23 t/ha %RMSE: 39.3 % (=RMSE/mean ) PALSAR HV γ 0 (15 x 15 pix average) Water, Lay-over, Shadowing mask Urban area mask Biomass map
- 19. 400 ～ 0 100 200 300 Above ground biomass (t/ha)
- 20. Cropland Cropland Wetland 400 ～ 0 100 200 300 Above ground biomass (t/ha)
- 21. 1 km (c) Google Earth 400 ～ 0 100 200 300 Above ground biomass (t/ha)