Asia Center for Air Pollution Research
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Publication of "Guidelines for Developing Emission Inventory in East Asia"

● Guidelines for Developing Emission Inventory in East Asia

● Outlines of Guidelines for Developing Emission Inventory in East Asia

East Asia region, whose economy has been rapidly growing, has seen the increase in emissions of air pollutants such as sulphur dioxide (SO2) and nitrogen oxides (NOx), which are also acidifying species, Volatile Organic Compound (VOC), and particulate matters, leading to rising concerns of their environmental impacts. Also, tropospheric ozone, partly generated through the chemical reaction process involving NOx and VOC, has attracted attention as regional air pollution, and there have been reports on the increase in its concentrations, and effects on plants. Fine particulate matter is another pollutant of concerns in many countries.

This serious condition of air pollution not only impedes the sustainable development in each country in the East Asia region, but may also affect the air quality of neighboring countries or the background level on a global scale. Large point sources of air pollutants are also large point sources of greenhouse gas.

In order to take science-based effective policy measures against these air pollutants, basic information necessary to assess reduction potentials and control measures and to establish reduction targets should be organized as a starting point. So far, a few sets of emission inventory, including global-scale one, which is one form of such basic information, have been developed in East Asia by respective governments and researchers. However, there were no agreed methodologies of developing emission inventory, which would improve the transparency and comparability of inventory.

Effective management of atmospheric environment at regional level is becoming more urgent in East Asia, as shown, among other things, by the increase in tropospheric ozone concentrations. To handle long range transports of air pollutants, analyses based on emission inventory and simulation models are especially critical. Such analyses will be much more simplified and useful, once the methodologies can be standardized across the region. Also through cooperation in preparing emission inventory, national capacity could be developed for the measurement of emission and emission factor as well as application of inventory and models. These can result in contribution to both environmental protection in each country and reduced long range transports of air pollutants.

This publication, "Guidelines for Developing Emission Inventory in East Asia", was developed by "Study Committee for Methodologies of Developing Emission Inventory in East Asia" which was sponsored by the Ministry of the Environment, Japan, with the aim to establish the common methodologies of developing emission inventory.

March 2012


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