A new perspective on the fukushima releases brought by newly available137CS Air concentration observations and reliable meteorological fields

O. Saunier; A. Mathieu; T. Sekiyama; M. Kajino; K. Adachi; M. Bocquet; Y. Igarashi; T. Maki; D. Didier

A new perspective on the fukushima releases brought by newly available¹³⁷CS Air concentration observations and reliable meteorological fields

O. Saunier
, A. Mathieu
, T. Sekiyama
, M. Kajino
, K. Adachi
, M. Bocquet
, Y. Igarashi
, T. Maki
, D. Didier

IRSN Institut de Radioprotection et de Sureté Nucléaire
JMA Meteorological Research Institute
Lamsid/EDF/R and D

Résultats de recherche: Le chapitre dans un livre, un rapport, une anthologie ou une collection › Contribution à une conférence › Revue par des pairs

Résumé

Five years after the Fukushima accident, many estimates of the source term (ST) have been published. In this study, the relevance of several ST is examined by performing a sensitivity analysis using several meteorological fields. The simulations prove that the MRI meteorological fields with higher spatial and temporal resolution give better scores. However, the uncertainties on the meteorological fields and ST remain high since several contamination events remain difficult to reproduce. In addition, the inverse modeling method developed by IRSN is applied to evaluate new ST using MRI meteorological fields, Tsuruta ¹³⁷Cs air concentration and gamma dose rate measurements. Simulations forced by these new inverted ST improve the agreement between model and observations in comparison with previous simulations especially between March 20 and March 22. A better reconstruction of the most of contamination events is also obtained.

langue originale	Anglais
titre	HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings
rédacteurs en chef	Zita Ferenczi, Laszlo Bozo, Marta T. Puskas
Editeur	Hungarian Meteorological Service
Pages	528-535
Nombre de pages	8
ISBN (Electronique)	9789639931107
état	Publié - 1 janv. 2016
Modification externe	Oui
Evénement	17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2016 - Budapest, Hongrie Durée: 9 mai 2016 → 12 mai 2016

Série de publications

Nom	HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings
Volume	2016-May

Une conférence

Une conférence	17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2016
Pays/Territoire	Hongrie
La ville	Budapest
période	9/05/16 → 12/05/16

Autres fichiers et liens

Lien vers la publication dans Scopus

Contient cette citation

Saunier, O., Mathieu, A., Sekiyama, T., Kajino, M., Adachi, K., Bocquet, M., Igarashi, Y., Maki, T., & Didier, D. (2016). A new perspective on the fukushima releases brought by newly available¹³⁷CS Air concentration observations and reliable meteorological fields. Dans Z. Ferenczi, L. Bozo, & M. T. Puskas (eds.), HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings (p. 528-535). (HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings; Vol 2016-May). Hungarian Meteorological Service.

Saunier, O. ; Mathieu, A. ; Sekiyama, T. et al. / A new perspective on the fukushima releases brought by newly available¹³⁷CS Air concentration observations and reliable meteorological fields. HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings. Editeur / Zita Ferenczi ; Laszlo Bozo ; Marta T. Puskas. Hungarian Meteorological Service, 2016. p. 528-535 (HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings).

@inproceedings{64850526f449469591ea1665d801c48d,

title = "A new perspective on the fukushima releases brought by newly available137CS Air concentration observations and reliable meteorological fields",

abstract = "Five years after the Fukushima accident, many estimates of the source term (ST) have been published. In this study, the relevance of several ST is examined by performing a sensitivity analysis using several meteorological fields. The simulations prove that the MRI meteorological fields with higher spatial and temporal resolution give better scores. However, the uncertainties on the meteorological fields and ST remain high since several contamination events remain difficult to reproduce. In addition, the inverse modeling method developed by IRSN is applied to evaluate new ST using MRI meteorological fields, Tsuruta 137Cs air concentration and gamma dose rate measurements. Simulations forced by these new inverted ST improve the agreement between model and observations in comparison with previous simulations especially between March 20 and March 22. A better reconstruction of the most of contamination events is also obtained.",

keywords = "Atmospheric dispersion model, Fukushima accident, Inverse modelling, Source reconstruction",

author = "O. Saunier and A. Mathieu and T. Sekiyama and M. Kajino and K. Adachi and M. Bocquet and Y. Igarashi and T. Maki and D. Didier",

note = "Publisher Copyright: {\textcopyright} 2018 Hungarian Meteorological Service. All Rights Reserved.; 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2016 ; Conference date: 09-05-2016 Through 12-05-2016",

year = "2016",

month = jan,

day = "1",

language = "English",

series = "HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings",

publisher = "Hungarian Meteorological Service",

pages = "528--535",

editor = "Zita Ferenczi and Laszlo Bozo and Puskas, \{Marta T.\}",

booktitle = "HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings",

}

Saunier, O, Mathieu, A, Sekiyama, T, Kajino, M, Adachi, K, Bocquet, M, Igarashi, Y, Maki, T & Didier, D 2016, A new perspective on the fukushima releases brought by newly available¹³⁷CS Air concentration observations and reliable meteorological fields. Dans Z Ferenczi, L Bozo & MT Puskas (eds), HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings. HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings, VOL. 2016-May, Hungarian Meteorological Service, p. 528-535, 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2016, Budapest, Hongrie, 9/05/16.

A new perspective on the fukushima releases brought by newly available¹³⁷CS Air concentration observations and reliable meteorological fields. / Saunier, O.; Mathieu, A.; Sekiyama, T. et al.
HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings. Ed. / Zita Ferenczi; Laszlo Bozo; Marta T. Puskas. Hungarian Meteorological Service, 2016. p. 528-535 (HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings; Vol 2016-May).

Résultats de recherche: Le chapitre dans un livre, un rapport, une anthologie ou une collection › Contribution à une conférence › Revue par des pairs

TY - GEN

T1 - A new perspective on the fukushima releases brought by newly available137CS Air concentration observations and reliable meteorological fields

AU - Saunier, O.

AU - Mathieu, A.

AU - Sekiyama, T.

AU - Kajino, M.

AU - Adachi, K.

AU - Bocquet, M.

AU - Igarashi, Y.

AU - Maki, T.

AU - Didier, D.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Five years after the Fukushima accident, many estimates of the source term (ST) have been published. In this study, the relevance of several ST is examined by performing a sensitivity analysis using several meteorological fields. The simulations prove that the MRI meteorological fields with higher spatial and temporal resolution give better scores. However, the uncertainties on the meteorological fields and ST remain high since several contamination events remain difficult to reproduce. In addition, the inverse modeling method developed by IRSN is applied to evaluate new ST using MRI meteorological fields, Tsuruta 137Cs air concentration and gamma dose rate measurements. Simulations forced by these new inverted ST improve the agreement between model and observations in comparison with previous simulations especially between March 20 and March 22. A better reconstruction of the most of contamination events is also obtained.

AB - Five years after the Fukushima accident, many estimates of the source term (ST) have been published. In this study, the relevance of several ST is examined by performing a sensitivity analysis using several meteorological fields. The simulations prove that the MRI meteorological fields with higher spatial and temporal resolution give better scores. However, the uncertainties on the meteorological fields and ST remain high since several contamination events remain difficult to reproduce. In addition, the inverse modeling method developed by IRSN is applied to evaluate new ST using MRI meteorological fields, Tsuruta 137Cs air concentration and gamma dose rate measurements. Simulations forced by these new inverted ST improve the agreement between model and observations in comparison with previous simulations especially between March 20 and March 22. A better reconstruction of the most of contamination events is also obtained.

KW - Atmospheric dispersion model

KW - Fukushima accident

KW - Inverse modelling

KW - Source reconstruction

UR - https://www.scopus.com/pages/publications/85041711541

M3 - Conference contribution

AN - SCOPUS:85041711541

T3 - HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings

SP - 528

EP - 535

BT - HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings

A2 - Ferenczi, Zita

A2 - Bozo, Laszlo

A2 - Puskas, Marta T.

PB - Hungarian Meteorological Service

T2 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, HARMO 2016

Y2 - 9 May 2016 through 12 May 2016

ER -

Saunier O, Mathieu A, Sekiyama T, Kajino M, Adachi K, Bocquet M et al. A new perspective on the fukushima releases brought by newly available¹³⁷CS Air concentration observations and reliable meteorological fields. Dans Ferenczi Z, Bozo L, Puskas MT, rédacteurs en chef, HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings. Hungarian Meteorological Service. 2016. p. 528-535. (HARMO 2016 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes, Proceedings).