Asian Journal of Atmospheric Environment

Korean Society for Atmospheric Environment (한국대기환경학회)
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Emission of Biogenic Volatile Organic Compounds from Trees along Streets and in Urban Parks in Tokyo, Japan

  • Matsunaga, Sou N. (Tokyo Metropolitan Research Institute for Environmental Protection) ;
  • Shimada, Kojiro (Tokyo Metropolitan Research Institute for Environmental Protection) ;
  • Masuda, Tatsuhiko (Tokyo Metropolitan Research Institute for Environmental Protection) ;
  • Hoshi, Junya (Tokyo Metropolitan Research Institute for Environmental Protection) ;
  • Sato, Sumito (Tokyo Metropolitan Agriculture and Forestry Research Center) ;
  • Nagashima, Hiroki (Tokyo Metropolitan Agriculture and Forestry Research Center) ;
  • Ueno, Hiroyuki (Tokyo Metropolitan Research Institute for Environmental Protection)
  • Received : 2016.11.15
  • Accepted : 2016.12.11
  • Published : 2017.03.31
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Abstract

Ozone concentration in Tokyo Metropolitan area is one of the most serious issues of the local air quality. Tropospheric ozone is formed by radical reaction including volatile organic compound (VOC) and nitrogen oxides ($NO_x$). Reduction of the emission of reactive VOC is a key to reducing ozone concentrations. VOC is emitted from anthropogenic sources and also from vegetation (biogenic VOC or BVOC). BVOC also forms ozone through $NO_x$ and radical reactions. Especially, in urban area, the BVOC is emitted into the atmosphere with high $NO_x$ concentration. Therefore, trees bordering streets and green spaces in urban area may contribute to tropospheric ozone. On the other hand, not all trees emit BVOC which will produce ozone locally. In this study, BVOC emissions have been investigated (terpenoids: isoprene, monoterpenes, sesquiterpenes) for 29 tree species. Eleven in the 29 species were tree species that did not emit BVOCs. Three in 12 cultivars for future planting (25 %) were found to emit no terpenoid BVOCs. Eight in 17 commonly planted trees (47%) were found to emit no terpenoid BVOC. Lower-emitting species have many advantages for urban planting. Therefore, further investigation is required to find the species which do not emit terpenoid BVOC. Emission of reactive BVOC should be added into guideline for the urban planting to prevent the creation of sources of ozone. It is desirable that species with no reactive BVOC emission are planted along urban streets and green areas in urban areas, such as Tokyo.

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References

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