Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data

1. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Piedad Cristiano & María Eugenia Beget INTA & CONICET– Buenos Aires - Argentina

2. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data • ANPP maps of Pampa Region will be generated monthly to supply farmers, cooperative associations and government decision makers to provide a useful tool for the development of their activities optimally. Efficiency Model NPP = APAR x RUE PAR x fPAR Kumar & Monteith 1982

3. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Particular objective of this exercise is to compute annual ANPP for 2007.

4. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Pre-processing c:\ILWIS\gdal_translate.exe -of ILWIS C:\DevCoCast_15\rue_autwin.tif C:\DevCoCast_15\rue_autwin.mpr

5. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Pre-processing Using ILWIS tools

6. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Pre-processing Using ILWIS tools

7. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Pre-processing Using scripts

8. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Data analysis

9. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Data analysis fpar_jan07_min=iff (fpar_jan07.mpr<=0, 0, fpar_jan07.mpr) fpar_jan07_f=iff (fpar_jan07_min.mpr>=0.95, 0.95, fpar_jan07_min.mpr) Nonlinear method(Potter et al. 1993)

10. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Data analysis apar_jan07= fpar_jan07_f * par_jan07_f

11. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Data analysis Monthly results anpp_jan07= apar_jan07 * rue_sprsum_f *10

12. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Data analysis Final results anpp_07 = anpp_jan07 + anpp_feb07 + anpp_mar07 + anpp_apr07 + anpp_may07 + anpp_jun07 + anpp_jul07 + anpp_aug07 + anpp_sep07 + anpp_oct07 + anpp_nov07 + anpp_dec07

13. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Conclusions A methodology to compute monthly ANPP in the Pampa Region from NDVI and PAR data was presented. The methodology is based on the efficiency model using bi-seasonal RUE maps. ANPP was compared with ANPP estimated by two models (CASA and Sala et al. 1994) and by efficiency model using fixed RUE=0.48 g/MJ. Validation performed better using this methodology (bi-seasonal variable RUE map) than ANPP calculated from a fixed RUE. A further validation against field data is warranted. Same methodology can be applied using NDVI derived from the SPOT Vegetation instrument or the daily NDVI derived from the SEVIRI-instrument onboard Meteosat Second Generationavailable from the GEONETCast toolbox.

14. Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data THANK YOU / GRACIAS / MERCI / OBRIGADAS / DANK U