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