Transcript Risk Assessment of Carbon Sequestration in Urban Terrestrial

Ecological Assessment of Developing Carbon
Sequestration in Shenyang, China
Trend and Future of Sustainable Development
Conference, 9-10th June 2011.
Presenter: Zhang Tianlin
9th of June, 2011
Categories
(in global acres)
Family Footprint
(in acres)
Chinese national average Footprint Ratio of each category
(in acres)
(in percentage)
Carbon Footprint
10.22
9.99
18.07%
Food Footprint
14.67
14.24
25.93%
Housing Footprint
6.11
4.87
10.80%
Goods and Service Footprint
25.57
14.10
45.20%
Family total footprint
56.57
43.20
Categories
(in global acres)
Family Footprint
(in acres)
Chinese national average footprint (in
acres)
-
Ratio of each category
(in percentage)
Cropland footprint
7.21
5.64
12.75%
Pastureland footprint
15.28
11.58
27.01%
Marine fisheries footprint
13.17
10.42
23.28%
Forestland footprint
20.90
15.57
36.95%
Family total footprint
56.57
43.20
-
Number of Earth
1.46
1.11
-
The proportion of carbon emission from a family in the
7.28% city of Shenyang
0.40%
0.57%
1.13%
50%
40.72%
Electricity
Natural gas
Water supply
Small car
Motor vehicle
Air travel
Objectives
• Obstacles and ecologically risk appraisal of developing carbon
sequestration in urban terrestrial ecosystem
• The amount of green lands for carbon cycle balance and their
distributions
• Feasibilities for carbon sequestration
• Climate policy decision for residents at local level (air quality
control, long-term climate change strategies)
Research questions
1.
2.
3.
4.
5.
What are the primary resources of carbon emission in urban
central area?
What are the risks for developing carbon sequestration in urban
area?
How many trees should be planted for carbon neutral in urban
terrestrial ecosystem?
What are the strategies for residents living in a low carbon
environment? (Electricity consumption, natural gas and water uses,
vehicle fuels consumption)
What is climate policy for citizens?
Methods
• Modelling the carbon cycle of urban ecosystem
• Ecologically-based life cycle assessment (eco-LCA)
• Geographical Information System (GIS) and Remote Sensing
application for making carbon sinks and population density
distribution
Modelling the carbon cycle of urban ecosystem
Ecologically-Based Life Cycle Assessment
(Eco-LCA) of Urban Ecosystem
• Calculate tree carbon sequestrating in addition of CO2 removal
amount
• Ming Zhe Yuan Community as an example in urban central area and
surrounding areas near the community are one small part for
estimating urban sprawl CO2 removal rate.
• Carbon emission resource with reference to the data from wind
direction frequency in urban meteorological station.
• Footprint characteristics of CO2 flux over the urban will be used for
calculating the value of CO2 by heating equipments accumulating in
the atmosphere.
Land use plan for urban central area
Central area of Shenyang City, 2005
Greenland distribution in central area of Shenyang
Shenyang-Fushun urban agglomeration, land satellite image in 2010
Analysis on composition of urban green lands in Shenyang
Landscape type
Total area (m2)
Ratio (%)
Public green land
20237714
23.2
Productive green land
4623271
5.3
Green buffer
14742128
16.9
Green space attached to urban road and
square
11427330
13.1
Attached green space
5233892
6.0
Bordering green land
30967192
35.5
Total green land
87231526
-
Results
• The ecological footprints testing case of a single family in
the community
• The carbon emission from households
• Calculation of biomass and carbon take up rate
1.12×106 kg of CO2 have been taken up by forest trees per acrea in one day.
• Carbon flow process in urban central area
Main wind direction :east
Carbon emission resource: motor cars and heating equipments
Tree
Diameter at 1.4m
Stem Mass
Willow
14cm
53 kg
Chinese scholar tree
15cm
63kg
Pewter
19cm
142kg
According to the figure, the line equation can be drawn as
y=-1.32+2.64x
The equation can be expressed as:
Log10M=-1.32+2.64log10D
The reference data equation is very close to the Martin, et al equation. So,
Equation used in calculation log10M = -1.25 + 2.66 log10D (Martin equation)
Reference tree data of central area in Shenyang
2,5
log(Mass)
2
1,5
1
0,5
0
1,15
1,18
log(Diameter)
1,28
Population density as an indicator for
sustainable development
In 2010, population density is 75471.8/km2 in urban central area.
Future plan for green land reforestation in urban central area of Shenyang, China
Landscape type
Total area (m2)
Ratio (%)
Forested lands (acre)
Public green land
20237714
23.2
1873.08
Productive green land
4623271
5.3
427.9
Green buffer
14742128
16.9
1364.44
Green space attached to urban
road and square
11427330
13.1
1057.64
Attached green space
5233892
6.0
484.42
Bordering green land
30967192
35.5
2866.128
Total green land
87231526
-
8073.6
Findings
• The primary resources of carbon emission are motor cars, heating
equipments and activities of resident
• High population density
• Urban carbon cycle is imbalance
• 8073.6 acres were needed to sequestrate those carbon emissions
• 16 millions acres of green lands supposed to cover in the whole
city. (21554.6 acres of total green lands in urban central area at
the moment)
Conclusion
To live in a low carbon environment, the strategies for residents:
1.Control their electricity consumption less than 6.3kwh and 0.42 m3 of natural gas per day for the
residents to use.
2.Use 144kg water every day.
3. For small car emission, people can basically drive less than 0.31 kilometres for the people every day
living in Shenyang
Local climate policy for the citizens in Shenyang, China
•
•
•
•
•
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Use cleaner transport
Add energy-saving features to your home
Adopt energy-saving habits
Reduce your Food Footprint
Adopt water-saving habits
Reduce your Goods and Services Footprint
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