lai seasonal trajectory - ornl daac · lai seasonal trajectory grassland year: 2002 site: tund...
TRANSCRIPT
Land
Cover
L
BigFootLAI Seasonal TrajectoryGrassland
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
Day of Year
0 60 120 180 240 300 360
LAI
(m2 m
-2)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Grass
L
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootMeteorologicalInputs
M
Precipitation (cm)
0 60 120 180 240 300 360
0.0
0.5
1.0
1.5Minimum Temperature (oC)
0 60 120 180 240 300 360-60
-40
-20
0
20
40Maximum Temperature (oC)
0 60 120 180 240 300 360-40
-30
-20
-10
0
10
20
30
Vapor Pressure Deficit (kPa)
Day of Year
0 60 120 180 240 300 360
0.0
0.1
0.2
0.3
0.4
0.5Shortwave Radiation (MJ m-2 d-1)
Day of Year
0 60 120 180 240 300 360
05
101520253035
PAR (MJ m-2 d-1)
Day of Year
0 60 120 180 240 300 360
02468
1012141618
N
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootGPP ComparisonBigFoot vs. Tower
Day of Year
0 60 120 180 240 300 360
GPP
(gC m
-2 d
-1)
0
1
2
3
4
TowerBigFoot
Tower GPP (gC m-2 d-1)
0 1 2 3 4
Big
Foot
GPP
(gC m
-2 d
-1)
0
1
2
3
4
RMSE = 0.27
G
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootGPP ComparisonBigFoot vs. MODIS
BigFoot GPP (gC m-2 d-1)
0 1 2 3 4M
OD
IS G
PP (
gC m
-2 d
-1)
0
1
2
3
4
RMSE = 0.49
Day of Year
0 60 120 180 240 300 360
GPP
(gC m
-2 d
-1)
0
1
2
3
4
5
MODISBigFoot
G
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootNPP ComparisonBigFoot vs. MODIS
BigFoot MODIS
NPP
(gC m
-2 y
r-1)
0
20
40
60
80
100
N
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootCarbon Flux ComparisonBigFoot vs. MODIS
BigFoot MODIS
Car
bon F
lux
(gC m
-2 y
r-1)
0
20
40
60
80
100
120
140
160
180
Net Primary ProductionAutotrophic Respiration
N
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootMeteorological ComparisonTower vs. DAO*
PAR (MJ m-2 d-1)
Tower
0 3 6 9 12 15 18
DAO
0
3
6
9
12
15
18
Minimum Temperature (oC)
Tower
-40 -20 0 20
-40
-20
0
20
Vapor Pressure Deficit (kPa)
Tower
0.0 0.2 0.4 0.6 0.8 1.00.0
0.2
0.4
0.6
0.8
1.0
* DAO – Data Assimilation Office
M
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootFPAR ComparisonBigFoot vs. MODIS
BigFoot FPAR (fraction)
0.0 0.2 0.4 0.6 0.8 1.0M
OD
IS F
PAR (
frac
tion
)0.0
0.2
0.4
0.6
0.8
1.0
Day of Year
0 60 120 180 240 300 360
FPAR (
frac
tion
)
0.0
0.2
0.4
0.6
0.8
MODISBigFoot
F
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootLAI ComparisonBigFoot vs. MODIS
BigFoot LAI (m-2 m-2)
0.0 0.3 0.6 0.9 1.2 1.5M
OD
IS L
AI
(m-2
m-2
)0.0
0.3
0.6
0.9
1.2
1.5
Day of Year
0 60 120 180 240 300 360
LAI
(m-2
m-2
)
0.0
0.5
1.0
1.5
2.0
MODISBigFoot
L
Year: 2002Site: TUND (Alaska, USA)Biome: Arctic Tundra
BigFootLUE ComparisonBigFoot vs. MODIS
Day of Year
0 60 120 180 240 300 360
Light
Use
Effic
iency
(gC M
J-1)
0
1
2
3
BigFootMODIS
L