Statistical Analysis for
Air Quality Management
Prof. Shin’ichi Okamoto
Tokyo University of Information Sciences
9:30-10:10 , 4 march, 2008
Concept of Air Quality Management
• Emission
Emission
<=
emission standard
• V
• V
• Ambient
Ambient concentration
concentration <=
Air Quality standard
• v
• V
• Impact
Impact(Human
(Humanhealth
healthEtc.)
etc.)
Science used for the research on
the relation between two areas
• Emission
• /\
• Atmospheric science
• /\
• Ambient concentration
• /\
• Medicine and/or Epidemiology
• /\
• Impact (Human health Etc.)
Source and receptor relation
•
advection
Emission rate
wind
diffusion
source
receptor
Ambient concentration
Cause effect diagram for
atmospheric process
Source condition
Stack height
Emission rate
Gas temperature and
exit velocity
Wind
Turbulence
(atmospheric stability)
Other reactive pollutants
Atmospheric condition
(meteorological condition)
Ambient concentration
at receptor site
Air Quality Model
• What is an Air Quality Model ?
– A model that express the relationship
between an emission source condition
and an ambient condition at a receptor
site.
– A model that usually uses a
mathematical expression based on a
theoretical thought or empirical
experience or both of them.
Theoretical model
advection and diffusion by turbulent flow,
chemical reactions in the atmosphere including
reaction within the suspended droplets
deposition, adsorption , and absorption on the
surface or other particles
( including many models that are used to
formulate a parameter appeared in the above
models)
Empirical model
• Quantitative analysis
– Mainly statistical manner
– Many models are supported by
theoretical considerations
• Qualitative analysis
– Related with many problem-solving tools
– Can be used for the initial stage of
quantitative analysis
Role of the statistics in the
atmospheric science
• Descriptive statistics
– (for example)
– compare with an Air Quality Standard
– Outline a situation of air quality at a site
• Inferential statistics
– Many aspects in Air quality management
– Many researches
Statistics
From Wikipedia, the free encyclopedia
• Statistics is a mathematical science pertaining to the
collection, analysis, interpretation or explanation, and
presentation of data. It is applicable to a wide variety of
academic disciplines, from the natural and social sciences
to the humanities, and to government and business.
• Statistical methods can be used to summarize or describe
a collection of data; this is called descriptive statistics. In
addition, patterns in the data may be modeled in a way
that accounts for randomness and uncertainty in the
observations, and then used to draw inferences about the
process or population being studied; this is called
inferential statistics. Both descriptive and inferential
statistics comprise applied statistics. There is also a
discipline called mathematical statistics, which is
concerned with the theoretical basis of the subject.
An example of statistical analysis for
particulate air pollution
• Receptor models are most familiar
models that use a typical statistical
method in the atmospheric
science.
– FA
– CMB
– PMF
– Etc.
Kashima Industrial Area
• C:\Documents and
Monitoring stations around the
Kashima industrial area
Varimax rotated factor loading
Time series of source contribution
for steel mill by a FA-MR model
Source contribution for iron steel mill
Fin
• Thank you for your kind attention !