eea – copenhague 1 18 - 19 may 2006 net primary production derived from land products remote...
TRANSCRIPT
EEA – Copenhague 18 - 19 May 20061
Net Primary Production derived from land products
Remote Sensing Data Overview
Nadine Gobron
With collaboration from STARS Group
EEA – Copenhague 18 - 19 May 20062
• CLC provides information at 250 m for year 2000
• Actual JRC-FAPAR products are derived from optical instruments at medium resolution at least at 1.2 km
• PAR from surface downward solar irradiance at 1.5 deg
Scientific Context
August 2000
EEA – Copenhague 18 - 19 May 20063
• SeaWiFS: JRC-FAPAR datasets;10/1998-12/2004 at global scale ≈ 2 km• MERIS: ESA Level 2 products; 06/2002-end of mission at 1.2 km (Full
resolution at 300 m not operational) Level 3, i.e. time composite products, are produced at JRC through the Grid on demand service (ESRIN) with JRC codes.
• MODIS (2000-end of mission) : JRC-FAPAR algorithm (both Level 2 and Level 3) has been developed at 1 km/500 m/250 m but there is no operational processing.
Actual Data Sets
April 2003 MODIS April 2004 SeaWiFS April 2005 MERIS
EEA – Copenhague 18 - 19 May 20064
AGRO
● JRC-FAPAR MODIS at 1.0 km
● JRC-FAPAR SeaWiFS at 2.17 km
● JRC-FAPAR MERIS at 1.2 km
Gobron N., et. al. (2006) ‘Evaluation of FAPAR Products for Different Canopy Radiation Transfer Regimes: Methodology and Results using JRC Products Derived from SeaWiFS and Ground-based Estimations', JGR, in press
Validation of
Ref: Turner et al. 2005FAPAR ≈ 1.-exp(-0.5<LAI>)<LAI> from PCA_LICOR Advanced procedure for spatio-temporal changes of local LAI
2003 ● JRC-FAPAR SeaWiFS at 2.17 km
EEA – Copenhague 18 - 19 May 20065
Merging products10-day SeaWiFS 10-day MERIS 10-day MODIS
10-day 3 Sensors
1 6 9 12 15 18 21 24 30NUMBER OF OBSERVATION
SENSORS
EEA – Copenhague 18 - 19 May 20066
• MERIS: ESA Level 2 products at full resolution at 300 m are not yet operationally produced by ESA.
Remote sensing data at higher resolution
Once installed, FAPAR-processor is automatically detected by VISAT (the BEAM main application, see http://www.brockmann-consult.de/). The FAPAR processor appears in the Tools menu of the VISAT application. The FAPAR product created can be saved in several formats (HDF5, BEAM-DIMAP).
EEA – Copenhague 18 - 19 May 20067
• MODIS algorithm has been adapted to be used at 250 m.
Remote sensing data at higher resolution
EEA – Copenhague 18 - 19 May 20068
RECTIFIED REDRECTIFIED RED
RECTIFIED NIRRECTIFIED NIR
Rectificationg1 and g2
FAPARFAPAR
Sub Sample
ANGLES @ 500 mMODIS 500mMODIS 500m
BRF RED TOABRF RED TOA BRF NIR TOABRF NIR TOA BRF BLUE TOABRF BLUE TOA
Rectificationg1 and g2
MODIS 1 kmAngles
FLAG Pixel Identification
Original JRC-FAPAR Algorithm @ 500 mRef: N. Gobron, O. Aussedat, B. Pinty (2006) “Moderate Resolution Imaging Spectro-radiometer (MODIS) - JRC-FAPAR Algorithm Theoretical Basis Document” Institute for Environment and Sustainability, EUR 22164 EN
EEA – Copenhague 18 - 19 May 20069
TOA divided by RECTIFIED
TOA divided by RECTIFIED
FACTOR OF RECTIFIED REDFACTOR OF
RECTIFIED RED
FACTOR OF RECTIFIED NIRFACTOR OF
RECTIFIED NIR
RECTIFIED RED
RECTIFIED NIR
FAPAR
Sub Sample
ANGLES @ 500 mMODIS 500mMODIS 500m
BRF RED TOABRF RED TOA BRF NIR TOABRF NIR TOA BRF BLUE TOABRF BLUE TOA
RECTIFIED REDRECTIFIED RED
RECTIFIED NIRRECTIFIED NIR
Rectificationg1 and g2
FAPARFAPAR
Rectificationg1 and g2
Sub Sample
BLUE @ 250 m ANGLES @ 250 m
MODIS 250 m
BRF RED TOA
BRF NIR TOA
RectificationNew Factor
MODIS 1 kmAngles
FLAG Pixel Identification
FLAG Pixel Identification
Patch JRC-FAPAR Algorithm @ 250 mRef: N. Gobron, O. Aussedat, B. Pinty (2006) “Moderate Resolution Imaging Spectro-radiometer (MODIS) - JRC-FAPAR Algorithm at 250 m Theoretical Basis Document” Institute for Environment and Sustainability, EUR In Press
EEA – Copenhague 18 - 19 May 200610
Harvard window [41.54N-43.54N,83.17W-83.17W]
2002/09/06
FAPAR with 250m/500m
FAPAR with 500m/1000m
FAPAR @500m FAPAR @1km (zoom at 200%)
FAPAR Comparison 2002/09/06
EEA – Copenhague 18 - 19 May 200611
FAPAR Comparison 2002/09/06
Harvard window [41.54N-43.54N,83.17W-83.17W]
EEA – Copenhague 18 - 19 May 200612
FAPAR Comparison 2003/06/01
Harvard window [41.54N-43.54N,83.17W-83.17W]
EEA – Copenhague 18 - 19 May 200613
Times Series of FAPAR over Harvard @1 km
Harvard
Gobron N., et. al. (2006) ‘Evaluation of FAPAR Products for Different Canopy Radiation Transfer Regimes: Methodology and Results using JRC Products Derived from SeaWiFS and Ground-based Estimations', JGR, in press
Ref: Turner et al. 2005FAPAR ≈ 1.-exp(-0.58<LAI>)<LAI> from PCA_LICOR Advanced procedure for spatio-temporal changes of local LAI
Conifer/broad-leaf forest
Ground-estimates
● 1 km
EEA – Copenhague 18 - 19 May 200614
Times Series of FAPAR over Harvard @500 m
Ground-estimates
● 500 m
● 500 m Patch
Harvard
Gobron N., et. al. (2006) ‘Evaluation of FAPAR Products for Different Canopy Radiation Transfer Regimes: Methodology and Results using JRC Products Derived from SeaWiFS and Ground-based Estimations', JGR, in press
Ref: Turner et al. 2005FAPAR ≈ 1.-exp(-0.58<LAI>)<LAI> from PCA_LICOR Advanced procedure for spatio-temporal changes of local LAI
Conifer/broad-leaf forest
EEA – Copenhague 18 - 19 May 200615
Times Series of FAPAR over Harvard @250 m
Harvard
Gobron N., et. al. (2006) ‘Evaluation of FAPAR Products for Different Canopy Radiation Transfer Regimes: Methodology and Results using JRC Products Derived from SeaWiFS and Ground-based Estimations', JGR, in press
Ref: Turner et al. 2005FAPAR ≈ 1.-exp(-0.58<LAI>)<LAI> from PCA_LICOR Advanced procedure for spatio-temporal changes of local LAI
Conifer/broad-leaf forest
● 250 m
Ground-estimates
EEA – Copenhague 18 - 19 May 200616
Times Series of FAPAR over Harvard
Harvard
Gobron N., et. al. (2006) ‘Evaluation of FAPAR Products for Different Canopy Radiation Transfer Regimes: Methodology and Results using JRC Products Derived from SeaWiFS and Ground-based Estimations', JGR, in press
Ref: Turner et al. 2005FAPAR ≈ 1.-exp(-0.58<LAI>)<LAI> from PCA_LICOR Advanced procedure for spatio-temporal changes of local LAI
Conifer/broad-leaf forest
Ground-estimates
● 1 km
● 2 x 2 at 500 m
● 4 x 4 at 250 m
18 - 19 May 200617
EEA – Copenhague
New products: Preliminary results
• Start and end of growing seasons derived from times series of 10-day FAPAR.
1 6 12 19 24 21 26 32 39 44 Ending
Start
18 - 19 May 200618
EEA – Copenhague
Case Study: where and when ?
• Small geographical window ?
• Period ?
EEA – Copenhague 18 - 19 May 200619
Space disk needs to process one month over “big” Europe
InputsOne day MODIS Radiances = 20 files at 250 m (20 x 287 MB = 5740 MB) + 20 files at 500 m (276 MB) + 20 files at 1 km (344 MB)
One Month = 177940 MB (250 m) + 171120 MB (500 m) +213289 MB (1 km) = 562 349 MB = 550 GB
Final Outputs at 250 m
Single daily product = 6756 MB
Monthly production = 209 436 MB = 204 GB
MODIS processing at 250 m ?