Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data Piedad...
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Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
Piedad Cristiano & María Eugenia Beget
INTA & CONICET– Buenos Aires - Argentina
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
NPP = APAR x RUE
PAR x fPAR
Kumar & Monteith 1982
Efficiency Model
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.
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E P
R O
C E
S S
I N
GD
A T
A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
Particular objective of
this exercise is to
compute annual ANPP
for 2007.
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
c:\ILWIS\gdal_translate.exe -of ILWIS C:\DevCoCast_15\rue_autwin.tif C:\DevCoCast_15\rue_autwin.mpr
Pre-processing
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
Pre-processing
Using ILWIS tools
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
Pre-processing
Using ILWIS tools
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
Pre-processing
Using scripts
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
Data analysis
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
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)
Data analysis
Nonlinear method (Potter et al. 1993)
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
apar_jan07= fpar_jan07_f * par_jan07_f
Data analysis
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E
P R
O C
E S
S I
N G
D A
T A
A
N A
L Y
S I
S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
anpp_jan07= apar_jan07 * rue_sprsum_f *10
Data analysis
Monthly results
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
RUE_*.tif NDVI_*.tif PAR_*.tif
NDVI _*.mpr PAR _*.mpr
Convert toILWIS format
NDVI _*.mpr PAR _*.mpr
Subset tostudy area
Change pixelsize/study area
fPAR _*.mpr
(1+NDVI)/(1-NDVI)
4.05
If fPAR ≥ 0
If fPAR ≥ 0.95 fPAR = 0
No
Yes
fPAR = 0.95
fPAR _*.mpr
Yes
No
APAR _*.mpr
fPAR x PAR
RUE x APAR
ANPP_*.mpr ∑ month ANPP1
12annualANPP_*.mpr
P R
E P
R O
C E
S S
I N
GD
A T
A
A N
A L
Y S
I S
(1)
(2) (4)
(5)
(6)
(7)
- 0.2666
(8)
(9)
(10)
RUE_*.mpr
Change pixelsize/study area
RUE_*.mpr
(3)
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
Final results
Data analysis
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 Generation available from the GEONETCast toolbox .
Aboveground Net Primary Productivity estimation of Pampa grasslands using MODIS and GOES data
THANK YOU / GRACIAS / MERCI / OBRIGADAS / DANK U