EnKF and 4D-Var data assimilation with chemical transport model BASCOE (version 05.06)

Skachko, Sergey; Ménard, Richard; Errera, Quentin; Christophe, Yves; Chabrillat, Simon

doi:10.5194/gmd-9-2893-2016

Articles | Volume 9, issue 8

https://doi.org/10.5194/gmd-9-2893-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/gmd-9-2893-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 9, issue 8

Methods for assessment of models

|

26 Aug 2016

Methods for assessment of models |

| 26 Aug 2016

EnKF and 4D-Var data assimilation with chemical transport model BASCOE (version 05.06)

Sergey Skachko, Richard Ménard, Quentin Errera, Yves Christophe, and Simon Chabrillat

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Aug 2016	33	18	1	52
Sep 2016	55	17	3	75
Oct 2016	22	13	7	42
Nov 2016	18	6	5	29
Dec 2016	20	5	2	27
Jan 2017	34	14	8	56
Feb 2017	35	16	9	60
Mar 2017	51	21	13	85
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Feb 2025	31	10	2	43
Mar 2025	13	10	0	23
Apr 2025	14	13	0	27
May 2025	32	16	1	49
Jun 2025	51	23	2	76
Jul 2025	43	12	3	58
Aug 2025	36	35	1	72
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Oct 2025	42	34	4	80
Nov 2025	53	53	5	111

Cumulative views and downloads (calculated since 13 May 2016)

Month	HTML	PDF	XML	Total
May 2016	135	34	0	169
Jun 2016	37	12	1	50
Jul 2016	14	4	0	18
Aug 2016	33	18	1	52
Sep 2016	55	17	3	75
Oct 2016	22	13	7	42
Nov 2016	18	6	5	29
Dec 2016	20	5	2	27
Jan 2017	34	14	8	56
Feb 2017	35	16	9	60
Mar 2017	51	21	13	85
Apr 2017	56	17	10	83
May 2017	65	26	18	109
Jun 2017	57	21	18	96
Jul 2017	24	8	3	35
Aug 2017	9	4	1	14
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Oct 2017	11	9	2	22
Nov 2017	8	7	0	15
Dec 2017	17	6	1	24
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Feb 2018	12	3	1	16
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Jul 2025	43	12	3	58
Aug 2025	36	35	1	72
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Oct 2025	42	34	4	80
Nov 2025	53	53	5	111

Latest update: 28 Nov 2025

Short summary

In the present work, we performed a comparison of two broadly used data assimilation algorithms, 4D-Var and EnKF, applied to a state-of-the-art atmospheric chemistry transport model. The comparison is carried out using carefully calibrated error statistics. The paper discusses the advantages and disadvantages of each method applied to real-life conditions of a numerical atmospheric chemistry data assimilation.