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33 years of non-stationary global land photosynthetic capacity observations Compton Tucker & Jorge Pinzon NASA/GSFC Change AVHRR band 1 to only green &

Published byLilian Antonia Daniels Modified over 9 years ago

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Presentation on theme: "33 years of non-stationary global land photosynthetic capacity observations Compton Tucker & Jorge Pinzon NASA/GSFC Change AVHRR band 1 to only green &"— Presentation transcript:

1 33 years of non-stationary global land photosynthetic capacity observations Compton Tucker & Jorge Pinzon NASA/GSFC Change AVHRR band 1 to only green & red regions Ground studies NDVI time series for biomass accumulation Transfer NDVI-biomass method to AVHRR data Produce satellite data sets for use by others

2 The TIROS-N AVHRR Ch 1 Ch 2 (Very broad or wide spectral bands) The NOAA person(s) responsible for these excellent examples of poor spectral resolution should be tarred and feathered. Overlapping bands are a mistake

3 Bad Design for TIROS-N Channel 1 Working in 1976 with Stan Schneider and Dave McGinnis of NOAA/NESDIS, AVHRR channel 1 was changed starting with NOAA-6 From my PhD dissertation Chapter 5 (1975) and Tucker and Maxwell 1976:

4 AVHRR Channels 1 & 2 Adjustments

5 Beltsville USA winter wheat biomass

6 NOAA AVHRR 8-km NDVI Data Set Radiation

7 NDVI summed vs. flux tower GPP

8 AVHRR 2/3 Dual Gain NDVI Adjustment

9 AVHRR 2/3 Dual Gain NDVI Adjustment (Jorge Pinzon NASA/GSFC)

10 Variances in NDVI3g NDVI data

11 Photosynthesis, NDVI, & Fluorescence

12 NDVI (potential) & Fluorescence (flux)

13 MODIS & AVHRR NDVI Comparisons

14 Arctic Tundra Biomass Comparison

15 Average Tundra AVHRR & MODIS

16 Lack of Station Keeping—Orbital Drift

17 Two Volcanic Aerosol Periods

18 NOAA AVHRR 8-km NDVI Data Set Diffuse average daily PAR[W/m2/mic] (0.4-0.7 mic) El Chichon (1982-1984)Mt. Pinatubo (1991-1994)

19 NDVI summed vs. total dry biomass Explained 80% of biomass accumulation

20 km2 #pixels: Gome-2 AVHRR MODIS Area 1: 615,6203369.6k 12M Area 2: 285,1121444.5k5.7M Area3: 513,017 2808.1k 10M A1sub1: 22,573 323730.5M A2sub1: 30,342 494770.7M A3sub1: 28,268 494440.6M

21 Integration of NDVI Data

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