Detailed source term estimation of the atmospheric release for the Fukushima Daiichi Nuclear Power Station accident by coupling simulations of an atmospheric dispersion model with an improved deposition scheme and oceanic dispersion model

Katata, G.; Chino, M.; Kobayashi, T.; Terada, H.; Ota, M.; Nagai, H.; Kajino, M.; Draxler, R.; Hort, M. C.; Malo, A.; Torii, T.; Sanada, Y.

doi:10.5194/acp-15-1029-2015

Articles | Volume 15, issue 2

https://doi.org/10.5194/acp-15-1029-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-15-1029-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 2

Research article

|

30 Jan 2015

Research article |

| 30 Jan 2015

Detailed source term estimation of the atmospheric release for the Fukushima Daiichi Nuclear Power Station accident by coupling simulations of an atmospheric dispersion model with an improved deposition scheme and oceanic dispersion model

G. Katata, M. Chino, T. Kobayashi, H. Terada, M. Ota, H. Nagai, M. Kajino, R. Draxler, M. C. Hort, A. Malo, T. Torii, and Y. Sanada

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PDF: 13,816
XML: 641
Total: 22,286
Supplement: 675
BibTeX: 212
EndNote: 258

Views and downloads (calculated since 05 Jun 2014)

Month	HTML	PDF	XML	Total
Jun 2014	332	253	22	607
Jul 2014	171	77	16	264
Aug 2014	145	177	28	350
Sep 2014	74	48	28	150
Oct 2014	43	4,510	23	4,576
Nov 2014	94	1,555	7	1,656
Dec 2014	435	629	10	1,074
Jan 2015	154	264	9	427
Feb 2015	895	457	42	1,394
Mar 2015	125	111	8	244
Apr 2015	83	95	8	186
May 2015	114	73	4	191
Jun 2015	80	88	12	180
Jul 2015	73	91	5	169
Aug 2015	44	78	5	127
Sep 2015	35	104	5	144
Oct 2015	64	110	6	180
Nov 2015	53	88	9	150
Dec 2015	36	83	3	122
Jan 2016	52	85	3	140
Feb 2016	57	74	3	134
Mar 2016	53	89	9	151
Apr 2016	22	58	2	82
May 2016	24	50	3	77
Jun 2016	15	34	1	50
Jul 2016	22	37	3	62
Aug 2016	13	31	1	45
Sep 2016	17	26	4	47
Oct 2016	17	29	4	50
Nov 2016	16	15	2	33
Dec 2016	10	23	2	35
Jan 2017	35	29	5	69
Feb 2017	31	177	5	213
Mar 2017	40	57	11	108
Apr 2017	49	69	5	123
May 2017	35	33	5	73
Jun 2017	39	46	5	90
Jul 2017	31	28	4	63
Aug 2017	27	31	5	63
Sep 2017	25	53	3	81
Oct 2017	44	46	6	96
Nov 2017	21	55	4	80
Dec 2017	22	45	2	69
Jan 2018	18	41	3	62
Feb 2018	18	47	4	69
Mar 2018	65	57	5	127
Apr 2018	25	54	3	82
May 2018	27	57	4	88
Jun 2018	20	46	4	70
Jul 2018	22	41	3	66
Aug 2018	21	37	5	63
Sep 2018	28	46	3	77
Oct 2018	32	108	7	147
Nov 2018	28	115	3	146
Dec 2018	19	103	2	124
Jan 2019	12	99	6	117
Feb 2019	15	77	1	93
Mar 2019	19	110	7	136
Apr 2019	13	107	0	120
May 2019	11	105	2	118
Jun 2019	14	83	1	98
Jul 2019	14	109	1	124
Aug 2019	13	112	1	126
Sep 2019	12	42	0	54
Oct 2019	10	17	0	27
Nov 2019	19	30	0	49
Dec 2019	14	22	4	40
Jan 2020	6	8	3	17
Feb 2020	20	15	2	37
Mar 2020	12	11	4	27
Apr 2020	22	14	1	37
May 2020	23	23	4	50
Jun 2020	29	13	5	47
Jul 2020	33	17	6	56
Aug 2020	15	13	8	36
Sep 2020	29	9	0	38
Oct 2020	18	9	8	35
Nov 2020	23	18	3	44
Dec 2020	35	13	13	61
Jan 2021	34	20	8	62
Feb 2021	36	31	14	81
Mar 2021	48	26	14	88
Apr 2021	64	21	17	102
May 2021	53	35	11	99
Jun 2021	49	29	10	88
Jul 2021	34	18	1	53
Aug 2021	44	20	9	73
Sep 2021	32	24	2	58
Oct 2021	54	55	8	117
Nov 2021	38	30	4	72
Dec 2021	45	23	1	69
Jan 2022	43	29	3	75
Feb 2022	58	22	4	84
Mar 2022	37	19	2	58
Apr 2022	48	22	2	72
May 2022	32	16	0	48
Jun 2022	44	22	1	67
Jul 2022	37	13	2	52
Aug 2022	41	22	0	63
Sep 2022	23	11	0	34
Oct 2022	41	13	1	55
Nov 2022	44	44	1	89
Dec 2022	34	14	1	49
Jan 2023	38	34	2	74
Feb 2023	46	35	3	84
Mar 2023	47	38	6	91
Apr 2023	32	33	1	66
May 2023	73	45	1	119
Jun 2023	66	28	1	95
Jul 2023	80	34	1	115
Aug 2023	67	30	1	98
Sep 2023	62	20	0	82
Oct 2023	149	30	2	181
Nov 2023	140	13	0	153
Dec 2023	79	34	1	114
Jan 2024	80	28	0	108
Feb 2024	79	22	0	101
Mar 2024	76	26	2	104
Apr 2024	79	26	3	108
May 2024	51	29	2	82
Jun 2024	76	23	2	101
Jul 2024	64	79	3	146
Aug 2024	51	24	1	76
Sep 2024	25	13	0	38
Oct 2024	46	38	0	84
Nov 2024	61	44	5	110
Dec 2024	42	41	1	84
Jan 2025	49	51	2	102
Feb 2025	72	25	3	100
Mar 2025	60	36	0	96
Apr 2025	44	39	0	83
May 2025	61	26	2	89
Jun 2025	76	62	0	138
Jul 2025	53	47	4	104
Aug 2025	82	52	0	134
Sep 2025	60	46	0	106
Oct 2025	82	92	0	174
Nov 2025	47	55	3	105

Cumulative views and downloads (calculated since 05 Jun 2014)

Month	HTML	PDF	XML	Total
Jun 2014	332	253	22	607
Jul 2014	171	77	16	264
Aug 2014	145	177	28	350
Sep 2014	74	48	28	150
Oct 2014	43	4,510	23	4,576
Nov 2014	94	1,555	7	1,656
Dec 2014	435	629	10	1,074
Jan 2015	154	264	9	427
Feb 2015	895	457	42	1,394
Mar 2015	125	111	8	244
Apr 2015	83	95	8	186
May 2015	114	73	4	191
Jun 2015	80	88	12	180
Jul 2015	73	91	5	169
Aug 2015	44	78	5	127
Sep 2015	35	104	5	144
Oct 2015	64	110	6	180
Nov 2015	53	88	9	150
Dec 2015	36	83	3	122
Jan 2016	52	85	3	140
Feb 2016	57	74	3	134
Mar 2016	53	89	9	151
Apr 2016	22	58	2	82
May 2016	24	50	3	77
Jun 2016	15	34	1	50
Jul 2016	22	37	3	62
Aug 2016	13	31	1	45
Sep 2016	17	26	4	47
Oct 2016	17	29	4	50
Nov 2016	16	15	2	33
Dec 2016	10	23	2	35
Jan 2017	35	29	5	69
Feb 2017	31	177	5	213
Mar 2017	40	57	11	108
Apr 2017	49	69	5	123
May 2017	35	33	5	73
Jun 2017	39	46	5	90
Jul 2017	31	28	4	63
Aug 2017	27	31	5	63
Sep 2017	25	53	3	81
Oct 2017	44	46	6	96
Nov 2017	21	55	4	80
Dec 2017	22	45	2	69
Jan 2018	18	41	3	62
Feb 2018	18	47	4	69
Mar 2018	65	57	5	127
Apr 2018	25	54	3	82
May 2018	27	57	4	88
Jun 2018	20	46	4	70
Jul 2018	22	41	3	66
Aug 2018	21	37	5	63
Sep 2018	28	46	3	77
Oct 2018	32	108	7	147
Nov 2018	28	115	3	146
Dec 2018	19	103	2	124
Jan 2019	12	99	6	117
Feb 2019	15	77	1	93
Mar 2019	19	110	7	136
Apr 2019	13	107	0	120
May 2019	11	105	2	118
Jun 2019	14	83	1	98
Jul 2019	14	109	1	124
Aug 2019	13	112	1	126
Sep 2019	12	42	0	54
Oct 2019	10	17	0	27
Nov 2019	19	30	0	49
Dec 2019	14	22	4	40
Jan 2020	6	8	3	17
Feb 2020	20	15	2	37
Mar 2020	12	11	4	27
Apr 2020	22	14	1	37
May 2020	23	23	4	50
Jun 2020	29	13	5	47
Jul 2020	33	17	6	56
Aug 2020	15	13	8	36
Sep 2020	29	9	0	38
Oct 2020	18	9	8	35
Nov 2020	23	18	3	44
Dec 2020	35	13	13	61
Jan 2021	34	20	8	62
Feb 2021	36	31	14	81
Mar 2021	48	26	14	88
Apr 2021	64	21	17	102
May 2021	53	35	11	99
Jun 2021	49	29	10	88
Jul 2021	34	18	1	53
Aug 2021	44	20	9	73
Sep 2021	32	24	2	58
Oct 2021	54	55	8	117
Nov 2021	38	30	4	72
Dec 2021	45	23	1	69
Jan 2022	43	29	3	75
Feb 2022	58	22	4	84
Mar 2022	37	19	2	58
Apr 2022	48	22	2	72
May 2022	32	16	0	48
Jun 2022	44	22	1	67
Jul 2022	37	13	2	52
Aug 2022	41	22	0	63
Sep 2022	23	11	0	34
Oct 2022	41	13	1	55
Nov 2022	44	44	1	89
Dec 2022	34	14	1	49
Jan 2023	38	34	2	74
Feb 2023	46	35	3	84
Mar 2023	47	38	6	91
Apr 2023	32	33	1	66
May 2023	73	45	1	119
Jun 2023	66	28	1	95
Jul 2023	80	34	1	115
Aug 2023	67	30	1	98
Sep 2023	62	20	0	82
Oct 2023	149	30	2	181
Nov 2023	140	13	0	153
Dec 2023	79	34	1	114
Jan 2024	80	28	0	108
Feb 2024	79	22	0	101
Mar 2024	76	26	2	104
Apr 2024	79	26	3	108
May 2024	51	29	2	82
Jun 2024	76	23	2	101
Jul 2024	64	79	3	146
Aug 2024	51	24	1	76
Sep 2024	25	13	0	38
Oct 2024	46	38	0	84
Nov 2024	61	44	5	110
Dec 2024	42	41	1	84
Jan 2025	49	51	2	102
Feb 2025	72	25	3	100
Mar 2025	60	36	0	96
Apr 2025	44	39	0	83
May 2025	61	26	2	89
Jun 2025	76	62	0	138
Jul 2025	53	47	4	104
Aug 2025	82	52	0	134
Sep 2025	60	46	0	106
Oct 2025	82	92	0	174
Nov 2025	47	55	3	105

Latest update: 23 Nov 2025

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Short summary

The detailed atmospheric releases during the Fukushima Daiichi Nuclear Power Station accident were estimated using a reverse estimation method with atmospheric and oceanic dispersion models. The major releases occurred on the afternoon of 12 March, midnight of 14 March, the morning and night of 15 March, and the morning of 16 March in 2011. Several atmospheric dispersion models with our new source term reproduced the local and regional patterns of I-131 and Cs-137 deposition and air dose rate.