Geoscience Communication
Geoscience Communication
GC
Articles | Volume 3, issue 2
Articles | Volume 3, issue 2
https://doi.org/10.5194/gc-3-233-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gc-3-233-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 3, issue 2
Research article
 | 
26 Aug 2020
Research article |  | 26 Aug 2020

Novel index to comprehensively evaluate air cleanliness: the Clean aIr Index (CII)

Tomohiro O. Sato, Takeshi Kuroda, and Yasuko Kasai

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Short summary
Air is as valuable a resource as water. We defined a novel index, the Clean aIr Index (CII), to evaluate air cleanliness in terms of a global standard. Japan was chosen as a study area. The air cleanliness of Tokyo was 1.5 and 2.3 times higher than that of Seoul and Beijing, respectively. Extremely clean air occurred to the west of the Pacific coast and in the southern remote islands of Tokyo during summer. CII can be valuable, e.g., for encouraging sightseeing in and migration to fresher air.
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