Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 16, issue 10
Articles | Volume 16, issue 10
https://doi.org/10.5194/acp-16-6241-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-16-6241-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 16, issue 10
Research article
 | 
24 May 2016
Research article |  | 24 May 2016

Fast descent routes from within or near the stratosphere to the surface at Fukuoka, Japan, studied using 7Be measurements and trajectory calculations

Hisanori Itoh and Yukinori Narazaki

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Short summary
By using high concentrations of 7Be as an indicator, we clarify fast descent routes from the stratosphere to Earth's surface in Japan. Most routes arise from high latitudes through the following processes: descent associated with a tropopause fold, southward movement with slow descent at the rear side of a strong trough, and strong descent at the south edge of the trough. The reason that high concentrations of 7Be occur most frequently in spring is explained.
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