Preparing
datasets:
Emission database( sectorial ) and spatial database (administrative
boundary, land cover , and population)
are required for making spatial allocation factors
for gridding.
Black Carbon emission data by province from China-Map
project are used for emission data base.
The 30 second by 30 second population and landcover data from LandScan
Global Population 1998 Database,
Oak Ridge National Laboratory are used for spatial database.
Country and province boundary map from China
Dimensions are used to make administrative boundary for China.
Administrative Boundaries of China( click at picture
for full view)
Deciding
spatial allocation factor
Total population, urban population , and rural population
had been chosen for making
high-resolution spatial allocation factors.They were
used for allocation of each the emission
sectors -residential coal use, residential biofuel use,
field combustion, and other.
Processing
datasets
Before calculating spatial allocation factors and assigning
emissions to the each cell,
each dataset had been processed to have same geographical
property. Population and
landcover within China boundary were extracted from global
dataset. They were
converted to GRID format using Arcview.
Population distribution of China, 30 sec by 30 sec
Population distribution of China, 30 sec by 30 sec
(click at picture for full view)
(click at picture for full view)
Making
spatial allocation factor
Urban and rural population by 30
second were extracted from total population using landcover data.
Total, urban, and rural population
by province were made from population, landcover,
and province boundary GIS database.From
dividing each 30 second population by province total,
spatial allocation factor were
calculated.
Allocating
emission to 30 second grid cell
Each allocation factor(the factors
made by total, urban, and rural population) multiplied to
province level emissions.And then,
Add all emissions by sector to make a total emissions
from each 30 second grid cell.
Making
gridded emission with other resolutions
Aggregating emission grid cells
to make gridded emission with different resolution.
The raw resolution dataset and
aggregate ones for 95 China BC emission presented
as some example. mission with other
resolutions.
For entire China
Gridded Black Carbon emission for year 1995 ,
Gridded Black Carbon emission for year 1995
(1 deg by 1 deg, country level)( click at picture
for full view)
(30 min by 30 min, country level) ( click at picture for full view)
Gridded Black Carbon emission for year 1995 , (5 min
by 5 min, country level) ( click at picture for full view)
For Beijing and Tianjin region
Gridded Black Carbon emission for year 1995 ,
Gridded Black Carbon emission for year 1995 ,
(1 deg by 1 deg, Beijing and Tianjin region)
(5 min by 5 min, Beijing and Tianjin region)
( click at picture for full view)
( click at picture for full view)
