Yuzuru Matsuoka

Contributions of disinfection by-products to activity inducing chromosomal aberrations of drinking water

The relationships between activity inducing chromosomal aberrations of waters treated with disinfectants and by-products were investigated by focusing on nitro and carbonyl groups, respectively. The contribution of the carbonyl group to activity inducing aberrations of treated waters was found to be large. On the other hand, the contribution of the nitro group was small. In the case of chlorinated water, organochlorine compounds contribute to activity inducing aberrations in addition to carbonyl group. The carbonyl group could be useful as a coarse indicator to compare activity inducing aberrations among waters treated with chlorine dioxide, chloramine, and ozone. Activity inducing aberrations of chlorinated water including the same amount of carbonyl group was demonstrated to reach approximately 10 times those of waters treated with three other disinfectants.

CO 2 emission reduction policy assessment: Emission scenarios in China

Abstract With the rapid economic growth, China became one of the biggest countries for energy consumption and CO 2 emission. This paper presents the forecast results of CO 2 emissions for several cases and assessment of different policy options by using AIM/end-use model, and analyzed CO 2 reduction cost for sectors. From the results, we found CO 2 emission will increase with the rapid economic development in China, but it is possible to slow down the CO 2 emission growth rate by technology progress though efficient market and by adoption of some policies for CO 2 reduction.

Asian-Pacific Integrated Model (AIM) for the Analysis of Global Climate Change

Abstract The Asian-Pacific Integrated Model (AIM) for evaluating policy options to stabilize global climate change has been developed. This model has three main submodels; the AIM/emission model for predicting greenhouse gas emissions, the AIM/climate model for estimating global and regional climate change, and the AIM/impact model for estimating the impacts of global warming. It focuses on policy assessment in the Asian-Pacific region and has the ability to prepare regional overviews. A high-quality spatial data-base support these functions. It is a collaborative project, and is being conducted with institutes of various countries in the region. Using this model, greenhouse gas emissions and their impacts on climate change and regional ecological systems have been estimated.