- エアロゾル研究 (ISSN:09122834)
- vol.25, no.1, pp.4-12, 2010-03-20 (Released:2010-03-25)
There has been interest in bioaerosols that have been linked to health hazards for humans, animals, and plants. Additionally, recently possible contributions of bioaerosols to atmospheric processes become a large concern from the view point of interaction between climate-weather and bioaerosol, especially the potential of micro organisms as ice nuclei. However knowledge on atmospheric bioaerosols is extremely poor due to the technical difficulty in measurement of bioaerosols in the atmosphere. Recently some investigators tried to collect atmospheric bioaerosols on high mountains and/or high tower to understand the transport processes, the environmental stress on micro biota in the atmosphere, the concentration and diversity of micro organisms in the atmosphere. Now the science of bioaerosols is world-widely accepted as large break-through in atmospheric science, aerosol science, environmental science, and others. The concentrations and diversity of bioaerosols in the atmosphere and the changes in their temporal-spatial are essential knowledge to clarify the long range transport of bioaerosols and the atmospheric processes affected by bioaerosols, and the environmental effects of micro organisms transported in long range. Balloon borne measurements were actively made in Kanazawa, Japan and Dunhuang, China in 2005-2009 suggesting that Kosa (Asian dust) particles were effective carriers of micro biota. Mixture states of Kosa and micro biota certainly suppress the environmental stress such as ultra-violet solar radiation, dryness and low temperature. The papers in this special issue of EAROZORU KENKYU are mainly based on these balloon borne measurements, and the newest information is described. Considering that the westerly wind frequently transports lots of Kosa particles from arid and semi-arid regions in China and Mongolia to downwind including Japan, the effect of Kosa bioaerosol mixture on environment, weather and health is of large concern in downwind areas. The paper by Kohshima (this issue) describes interesting and valuable topics in order to discuss the effects of Kosa bioaerosols on environment.