Reassessment of the radiocesium resuspension flux from contaminated ground surfaces in eastern Japan

Kajino, Mizuo; Watanabe, Akira; Ishizuka, Masahide; Kita, Kazuyuki; Zaizen, Yuji; Kinase, Takeshi; Hirai, Rikuya; Konnai, Kakeru; Saya, Akane; Iwaoka, Kazuki; Shiroma, Yoshitaka; Hasegawa, Hidenao; Akata, Naofumi; Hosoda, Masahiro; Tokonami, Shinji; Igarashi, Yasuhito

doi:https://doi.org/10.5194/acp-22-783-2022

Articles | Volume 22, issue 2

https://doi.org/10.5194/acp-22-783-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-783-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 2

Research article

|

18 Jan 2022

Research article |

| 18 Jan 2022

Reassessment of the radiocesium resuspension flux from contaminated ground surfaces in eastern Japan

Mizuo Kajino, Akira Watanabe, Masahide Ishizuka, Kazuyuki Kita, Yuji Zaizen, Takeshi Kinase, Rikuya Hirai, Kakeru Konnai, Akane Saya, Kazuki Iwaoka, Yoshitaka Shiroma, Hidenao Hasegawa, Naofumi Akata, Masahiro Hosoda, Shinji Tokonami, and Yasuhito Igarashi

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Preprint (discussion started on 20 Sep 2021)
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Interactive discussion

Status: closed

RC1:
'Comment on acp-2021-687', Anonymous Referee #1, 29 Sep 2021

Dear Authors,

In the "2.1 Observation data" section, there is no information about the height above ground level at which samplings were performed. The amount of resuspended material clearly depends on this height and this information may help understanding some discrepancies between the different sampling locations.

Citation: https://doi.org/10.5194/acp-2021-687-RC1
- AC1: 'Reply on RC1', Mizuo Kajino, 25 Oct 2021
  
  Dear Anonymous Referee #1,
  Thank you very much for your comment. The height of high volume samplers at Namie (Tsushima) and Tsukuba sites was 1.2 m from ground surface and that at Fukushima site was at 25 m. In the revised manuscript, we will include these information and discussion on the vertical differences based on your review comments, which will be posted later. I am sorry for my late response and we look forward to your review comments.
  Thank you for your time, in advance.
  With best regards,
  Mizuo Kajino
  
  Citation: https://doi.org/10.5194/acp-2021-687-AC1
RC2:
'Comment on acp-2021-687', Anonymous Referee #2, 19 Oct 2021

See attachment

Citation: https://doi.org/10.5194/acp-2021-687-RC2
- AC2: 'Reply on RC2', Mizuo Kajino, 12 Nov 2021
  
  Dear anonymous referee #2,
  We are very grateful for your detailed review and constructive comments and your time for RC2. Thanks to your review, our manuscript has been substantially improved, especially for readability (and I am very sorry for many typos which took your time). The revised manuscript is ready and we have considered all your comments in the revised manuscript. Attached please find the point-by-point responces to your comments. We look forward to your second review.
  Thank you very much for your time, in advance.
  Best regards,
  Mizuo Kajino
  
  Citation: https://doi.org/10.5194/acp-2021-687-AC2

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload

AR by Mizuo Kajino on behalf of the Authors (12 Nov 2021) Author's response Author's tracked changes Manuscript

ED: Publish as is (29 Nov 2021) by Jerome Brioude

AR by Mizuo Kajino on behalf of the Authors (30 Nov 2021)

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Short summary

Using a numerical model and observations of surface concentration and depositions, the current study provides quantitative assessments of resuspension, transport, and deposition of radio-Cs in eastern Japan in 2013, which was once deposited to the ground surface after the Fukushima nuclear accident. The areal mean resuspension rate of radio-Cs from the ground to the air is estimated as 0.96 % per year, which is equivalent to 1–10 % of the decreasing rate of the ambient gamma dose in Fukushima.