A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...
A Look at Amazon Basin Seasonal Dynamics with the Biophysical ... A Look at Amazon Basin Seasonal Dynamics with the Biophysical ...
Estimate of the consumption of photosyntheticaly active radiation(PAR) for the forest and the leaf area index (LAI) from remote sensing,related with collected field dataGeorge Sanches Suli (Rua França, n. 12, Jardim Europa – 78065-440, Cuiabá-MTBrasil - suli@terra.com.br), Peter Zeilhofer ((pitalike@terra.com.br), Nicolau PrianteFilho - Universidade Federal de Mato Grosso.George Louis Vourlitis (California StateUniversity San Marcos - georgev@coyote.csusm.edu)AbstractPresent work describes the development and validation of a methodology tocorrelate and extrapolate field measurements of Photosynthetic Active Radiation (PAR)and Leaf area index (LAI) of Transitional Forests and pastures stands with spectralreflection values of multisensoral digital satellite imagery. Field studies are being realizedin Northern Mato Grosso, at the Sinop Tower test site. Reference micrometeorologicaldata, PAR and LAI data are being acquired at the Tower site. Additional portable PARsensors are being installed above the forest canopy in heights of more than 40 m usingrappel techniques, scaling devices and rope stairs. For correlation with digital imagery,site locations are georreferenced by GPS measurements. LAI estimates are realized by thecomparison of radiation measurements above the tree layer and in the stands. Geometricand radiometric pre-processing of Landsat ETM and MODIS have been initiated. Due tothe lack of actual satellite imagery, there are being presented simulations of PAR valuesbased on tower measurements from the period 2001-2002 and digital Landsat ETM andMODIS from 2001 and 2002 respectively.In the future, the study pretends to analyze the applicability of different original andcalculated bands such as the NDVI (Normalized Difference Vegetation Index) for thecorrelation with field measurements and to study the influence of different spatial andspectral resolution on data extrapolation.
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Estim<strong>at</strong>e of <strong>the</strong> consumption of photosyn<strong>the</strong>ticaly active radi<strong>at</strong>ion(PAR) for <strong>the</strong> forest and <strong>the</strong> leaf area index (LAI) from remote sensing,rel<strong>at</strong>ed <strong>with</strong> collected field d<strong>at</strong>aGeorge Sanches Suli (Rua França, n. 12, Jardim Europa – 78065-440, Cuiabá-MTBrasil - suli@terra.com.br), Peter Zeilhofer ((pitalike@terra.com.br), Nicolau PrianteFilho - Universidade Federal de M<strong>at</strong>o Grosso.George Louis Vourlitis (California St<strong>at</strong>eUniversity San Marcos - georgev@coyote.csusm.edu)AbstractPresent work describes <strong>the</strong> development and valid<strong>at</strong>ion of a methodology tocorrel<strong>at</strong>e and extrapol<strong>at</strong>e field measurements of Photosyn<strong>the</strong>tic Active Radi<strong>at</strong>ion (PAR)and Leaf area index (LAI) of Transitional Forests and pastures stands <strong>with</strong> spectralreflection values of multisensoral digital s<strong>at</strong>ellite imagery. Field studies are being realizedin Nor<strong>the</strong>rn M<strong>at</strong>o Grosso, <strong>at</strong> <strong>the</strong> Sinop Tower test site. Reference micrometeorologicald<strong>at</strong>a, PAR and LAI d<strong>at</strong>a are being acquired <strong>at</strong> <strong>the</strong> Tower site. Additional portable PARsensors are being installed above <strong>the</strong> forest canopy in heights of more than 40 m usingrappel techniques, scaling devices and rope stairs. For correl<strong>at</strong>ion <strong>with</strong> digital imagery,site loc<strong>at</strong>ions are georreferenced by GPS measurements. LAI estim<strong>at</strong>es are realized by <strong>the</strong>comparison of radi<strong>at</strong>ion measurements above <strong>the</strong> tree layer and in <strong>the</strong> stands. Geometricand radiometric pre-processing of Lands<strong>at</strong> ETM and MODIS have been initi<strong>at</strong>ed. Due to<strong>the</strong> lack of actual s<strong>at</strong>ellite imagery, <strong>the</strong>re are being presented simul<strong>at</strong>ions of PAR valuesbased on tower measurements from <strong>the</strong> period 2001-2002 and digital Lands<strong>at</strong> ETM andMODIS from 2001 and 2002 respectively.In <strong>the</strong> future, <strong>the</strong> study pretends to analyze <strong>the</strong> applicability of different original andcalcul<strong>at</strong>ed bands such as <strong>the</strong> NDVI (Normalized Difference Veget<strong>at</strong>ion Index) for <strong>the</strong>correl<strong>at</strong>ion <strong>with</strong> field measurements and to study <strong>the</strong> influence of different sp<strong>at</strong>ial andspectral resolution on d<strong>at</strong>a extrapol<strong>at</strong>ion.
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