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Estimating the Carbon Cycle of South Africa with BETHY/DLR An Assessment Approach for Land Degradation Markus Niklaus, Markus Tum, Kurt Günther, German Aerospace Center (DLR). EGU General Assembly 2010, Vienna. Envisat MERIS, ESA 2004. Area of interest: South Africa. GLC2000, JRC. - PowerPoint PPT Presentation
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Estimating the Carbon Cycle of South Africa with BETHY/DLR
An Assessment Approach for Land Degradation
Markus Niklaus, Markus Tum, Kurt Günther, German Aerospace Center (DLR)
EGU General Assembly 2010, Vienna
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 2
Cluster Applied Remote Sensing
Area of interest: South Africa
Envisat MERIS, ESA 2004
GLC2000, JRC
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 3
Cluster Applied Remote Sensing
The Vegetation Model BETHY/DLR
BETHY/DLR
Biosphere Energy Transfer
Hydrology Model
Photosynthesis
Stomatal conductivity
Light use efficiency
Water balance
Evapotranspiration
Soil respiration
Net-Primary-Production
(NPP)
Net-Ecosystem-Production
(NEP)
Data base Methodological development Results
Relief/Geopotential
Meteorological Data(ECMWF)
Soil Types(FAO)
Land Cover Classification
(GLC 2000, MODIS VCF)
Leaf Area Index(VEGETATION)
further information: Poster EGU2010-3945 at BG86
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 4
Cluster Applied Remote Sensing
Meteorological Input Data(Scrubland)
0.15
0.17
0.19
0.21
0.23
0.25
0.27
0.29
0.31
0.33
1 31 61 91 121 151 181 211 241 271 301 331 361
Julian Day [d]
Soi
l wat
er [
m³/
m³]
0
10
20
30
40
50
60
70
80
90
100
Pre
cipi
tati
on [
mm
]
Available Soil Water
Precipitation
0
5
10
15
20
25
30
1 31 61 91 121 151 181 211 241 271 301 331 361
Julian Day [d]
Mea
n Te
mpe
ratu
re [
°C]
Mean Temperature
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 5
Cluster Applied Remote Sensing
Results: NPP Map for South Africa
National NPP-Sum for the year 2001
130 MtC
200
0
2001
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 6
Cluster Applied Remote Sensing
Results: Model Output for Scrubland-Pixel
0
2
4
6
8
10
12
14
16
18
1 31 61 91 121 151 181 211 241 271 301 331 361
Julian Day [d]E
vap
otr
ansp
irat
ion
[mm
/d]
Actual Evapotranspiration
Potential Evapotranspiration
Gross- and Net Primary Productivity (GPP/NPP) Actual and potential Evapotranspiration (ATP/PTP)
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1 31 61 91 121 151 181 211 241 271 301 331 361
Julian Day [d]
Pro
duct
ion
[gC
/m²/
d]
-0.04
0.01
0.06
0.11
0.16
0.21
0.26
Leaf
Are
a In
dex
[m²/
m²]
Net Primary Productivity
Gross Primary Productivity
Leaf Area Index
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 7
Cluster Applied Remote Sensing
Validation / Comparison
Validation with annual statistics about biomass stocks in semi-arid scrublands
Comparison with products derived from satellite data
MODIS GPP and NPP
C-Fix VEGETATION
Validation Approach:EGU2010-4228 by Markus Tum at XL17
Spot 5, CNES
Institut für Methodik der Fernerkundung bzw. Deutsches Fernerkundungsdatenzentrum
Folie 8
Cluster Applied Remote Sensing
Thank you for your attention
Poster session today 17:30 – 19:00
This presentation: EGU2010-3945 (BG86)Validation approach: EGU2010-4228 (XL17)
