1. VEGETATION Narrow- vs. Broad-Band Instruments Wavelength (nm) Reflectance TM Bands

2. AVIRIS Canopy % N Prediction Single scene calibration Multiple scene calibration (36) Reflectance data calibrated using PLS regression to measured foliar N (R 2 = 0.84). Whole Canopy Nitrogen Concentration Smith, M.L., Ollinger, S.V., Martin, M.E., Aber, J.D., Hallett, R.A., and Goodale, C.L. 2002. Direct estimation of aboveground forest productivity through hyperspectral remote sensing of canopy nitrogen. Ecological Applications 12 1286-1302. Smith, M. L.; Martin, M. E.; Plourde, L., and Ollinger, S. V. Analysis of hyperspectral data for estimation of temperate forest canopy nitrogen concentration: comparison between and airborne (AVIRIS) and a spaceborne (Hyperion) sensor. IEEE Transactions on Geoscience and Remote Sensing. 2003; 41(6):1332-1337.

3. Aboveground Woody Biomass Production 150 - 200 200 - 250 250 - 300 300 - 350 350 - 400 < 150 400 - 450 450 - 500 > 500 g m -2 yr -1 AVIRIS - Predicted Forest Productivity HB CP Smith, M.L., Ollinger, S.V., Martin, M.E., Aber, J.D., Hallett, R.A., and Goodale, C.L. 2002. Direct estimation of aboveground forest productivity through hyperspectral remote sensing of canopy nitrogen. Ecological Applications 12 1286-1302. N

4. N AVIRIS - Predicted Soil C:N Ratio 10 15 20 25 30 35 101520253035 Measured Soil C:N Predicted Soil C:N 1:1 line Nitrification Threshold Ollinger, S.V., Smith, M.L., Martin, M.E., Hallett, R.A., Goodale, C.L., and Aber, J.D. 2002. Regional Variation in Foliar Chemistry and N Cycling Among Forests of Diverse History and Composition. Ecology 83 339-355. Ollinger, S. V.; Smith, M. L.; Martin, M. E.; Hallett, R. A.; Goodale, C. L., and Aber, J. D. Regional Variation in Foliar Chemistry and N Cycling Among Forests of Diverse History and Composition. Ecology. 2002 Feb; 83(2):339-355. < 13 14 - 16 17 - 19 20 - 22 23 - 25 26 - 28 29 - 31 > 32

5. Smith, ML, Martin, ME, Plourde, LC, and Ollinger, SV. 2003. Analysis of Hyperspectral Data for Estimation of Temperate Forest Canopy Nitrogen Concentration, Comparison Between AVIRIS and Hyperion. IEEE Transactions on Geosci and Rem Sens 41:1332-1337 Both AVIRIS and Hyperion data collected for the Bartlett Experimental Forest are used to estimate canopy N for 44 sampled field plots Low High