Title: Simulating NPP and ET of Terrestrial Ecosystem in China using BPES Model
1???????????????????????Simulating NPP and ET
of Terrestrial Ecosystem in China using BPES
Model
- Xianfeng Feng Gaohuan Liu Jing Minh
Chen - Jane Liu Mingzhen Chen Weimin Ju
Wenzuo Zhou - Institute of Geographical Science and Natural
Resource Research, China - University of Toronto, Canada
2Outline ??
- 1. Introduction
- 2. Model and Methods
- 3. Data
- 4. Simulating
- 5. Analysis
- 6. Discussion and Conclusion
??????????????? Confronting Global Warming
Enhancing Chinas Capacity for Carbon
Sequestration
31. Introduction ??
Introduction
- Objects
- Estimation NPP and ET of terrestrial ecosystem in
China - Analysis the temporal-spatial distribution of NPP
and ET in China - Methods
- Using BEPS model
- Based on Remote sensing and GIS
4The Scheme about Research ????
Data Processing
Improving BEPS
Simulating
Analysis
5BEPS Model for China
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Model
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CO2
H2O
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CO2
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H2O
CO2
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The structure of BEPS model
6Database ??????
- Input data for BEPS model
- Coordinate system, spatial resolution, temporal
resolution - Data
- Meteorological data 1day, 1km
- LAI data8day,1km
- Biomass1 year (2001), 1km
- Land Cover 1 year (2001), 1km
- AWC, soil water 1km
- Plant Parameters
- Stomatal Conductance, Specific Leaf Area
- Validation Database
- Biomass
- LAI
- NPP
Data
7Data Fusion
8Validation modification
9Table Model
10Simulated data
11(No Transcript)
12Tmin
Tmax
Interpolation (ANUSPLIN)
Weather Stations
Precitation
Relative Humidity
Ā
Snowpack in 1 DOY
Radiation
13Simulating-methods and Step ?????
Test
- Simulating Validation ?
Simulating - (Multi-scale) (Multi-scale)
(National Wide)
- Input data
- Input data and parameters data
- Model- BEPS
- Output
- Images NPP, GPP, RA, ET, E,T
- Scale 1km ,1day, ten-day, month
Simulating
14Validation for NPP and ET
- Method
- Sites Changbai?Liping, Xingguo, Heihe
- Nationalabout 1000 plots,focus on forest
ecosystem - Site Validation
- Step 1 Measurements and survey
- LAI,Biomass and NPP form measurements
- step 2 Modeling and simulating
- LAI, Biomass and NPP from Remote sensing
- step 3Comparison
- BEPS-TM ? BEPS-MODIS
Simulating
15Site Validation (Changbaishan site)
BEPS-TM
BEPS-MODIS
Simulating
???????,?????NPP??,???????????,?BEPS-MODIS????????
??ET??,??????????????????????????????????TM?MODIS
???????????,?????????????????????BEPS-China???????
?????????NPP?ET?
16Sample plots validation (National wide)
- Sample plots validation (National wide)
- 1000 around sample plots (Forest)
- Yield validation ( crop )
- Yield ? total plant weight ? dry material weight
? NPP(C) - samples plots other simulating NPP (bush,
grass)
Simulating
17Simulated NPP in 2001
18NPP of China in 2001 for land cover
Simulating
19Simulating ET in 2001
20ET of China in 2001 for land cover
Simulating
21Analysis Factors Sensitivity
- Factors
- LAI
- Meteorological factors
- Air Temperature
- Precipitation
- Solar radiation
- VPD
- AWC
- How
- LAI?Precipitation?Radiation?VPD 20
- Temperature 1?
- AWC 20mm
Analysis
22AWC20mm
LAI20
T 1?
Pre20
Rad 20
VPD 20
23Analysis Factors Sensitivity
Analysis
- ????????????ET?????,????????LAI?
- ?????????????
24Monthly LAI in 2001
Analysis
Terrestrial LAI
Forest LAI
25Monthly NPP in 2001
26NPP in 2001 (Monthly)
- tow Peak-value
- crop
- In summer, respiration is very high, but the GPP
cant increase because of drought
27Monthly ET in 2001
28ET in 2001
- Peak-value in August
- middle-July a little low
29Mean LAI?NPP and ET for Latitude
Analysis
Terrestrial NPP
Forest NPP
30Mean LAI?NPP and ET for Longitude
Analysis
Terrestrial NPP
Forest NPP
31Mean LAI?NPP and ET for Altitude
Altitude Zone
Analysis
Mean LAI
Mean ET
Mean NPP
32Discussion and Conclusion
- NPP of Terrestrial Ecosystem in 2001
- Total2.235GtC
- Forest ecosystem 0.922GtC,Percentage is 42 for
whole terrestrial ecosystem - Mean235.2gC/m2yr
- Percentage NPP/GPP50.6
- NPP value is very different for different land
cover - ET of Terrestrial Ecosystem in 2001
- Mean418.81 mm/yr
- Percentage ET/Precipitation78.5
- ET value is very different for different land
cover
Concussion
33Thank you!