Chapter 6 Conclusions
6.2 Suggestions for further work
Nucleation and growth phenomena (NPF event) in atmospheric environment is one of the current issues. Number concentrations of particle generated by NPF process affect total number concentration of atmospheric aerosol and thereby effecting climate change and human health. Although further analysis and long-term observations might be necessary, the characteristics of the NPF events occurred at Fukue Island in Japan were identified in relation to the long-range transport. The finding in this thesis can provide the insights into understanding correlation between NPF and long-range transport of pollutants occurred in East-Asia region.
Chapter 6. Conclusion
97
Particle size magnifier (PSM) has significant potential on the detecting of sub-3 nm particles. The finding in this study can provide the information to develop the mixing-type particle counter. There is a weakness in our PSM system. One important future work is to improve the speed and precision of controlling saturation ratio inside the mixing part of the PSM while nucleation temperature is held at a constant value. It is also important to evaluate uncertainties of a set saturation ratio. Achieving the goal would expand the opportunities for studying the heterogeneous nucleation of various working fluids since experiments can be performed under steady states by combining the PSM and other commercially available aerosol instruments.
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