Description and evaluation of a new four-mode version of the Modal Aerosol Module  (MAM4) within version 5.3 of the Community Atmosphere Model

Liu, X.; Ma, P.-L.; Wang, H.; Tilmes, S.; Singh, B.; Easter, R. C.; Ghan, S. J.; Rasch, P. J.

doi:10.5194/gmd-9-505-2016

Articles | Volume 9, issue 2

https://doi.org/10.5194/gmd-9-505-2016

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

https://doi.org/10.5194/gmd-9-505-2016

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

Articles | Volume 9, issue 2

Model description paper

|

08 Feb 2016

Model description paper |

| 08 Feb 2016

Description and evaluation of a new four-mode version of the Modal Aerosol Module (MAM4) within version 5.3 of the Community Atmosphere Model

X. Liu, P.-L. Ma, H. Wang, S. Tilmes, B. Singh, R. C. Easter, S. J. Ghan, and P. J. Rasch

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Views and downloads (calculated since 29 Sep 2015)

Month	HTML	PDF	XML	Total
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Oct 2015	21	31	1	53
Nov 2015	7	10	0	17
Dec 2015	6	20	0	26
Jan 2016	20	18	0	38
Feb 2016	139	44	2	185
Mar 2016	46	32	0	78
Apr 2016	20	15	1	36
May 2016	20	18	5	43
Jun 2016	17	8	1	26
Jul 2016	14	11	3	28
Aug 2016	16	10	3	29
Sep 2016	26	19	3	48
Oct 2016	20	12	2	34
Nov 2016	19	17	1	37
Dec 2016	24	18	2	44
Jan 2017	36	24	3	63
Feb 2017	28	21	6	55
Mar 2017	42	36	7	85
Apr 2017	52	28	9	89
May 2017	62	31	14	107
Jun 2017	45	31	8	84
Jul 2017	32	22	2	56
Aug 2017	8	22	0	30
Sep 2017	14	20	1	35
Oct 2017	11	21	1	33
Nov 2017	13	30	0	43
Dec 2017	18	24	1	43
Jan 2018	17	35	0	52
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Mar 2018	24	49	0	73
Apr 2018	18	52	1	71
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Jul 2018	16	56	1	73
Aug 2018	32	61	4	97
Sep 2018	20	36	1	57
Oct 2018	30	53	1	84
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Mar 2019	23	63	0	86
Apr 2019	14	42	0	56
May 2019	10	28	1	39
Jun 2019	45	51	1	97
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Aug 2019	148	48	0	196
Sep 2019	152	36	3	191
Oct 2019	154	32	1	187
Nov 2019	22	38	0	60
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Jan 2020	36	13	1	50
Feb 2020	37	22	1	60
Mar 2020	35	20	0	55
Apr 2020	10	15	1	26
May 2020	26	34	0	60
Jun 2020	35	27	2	64
Jul 2020	69	57	33	159
Aug 2020	16	9	2	27
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May 2021	45	37	0	82
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Jan 2022	52	64	1	117
Feb 2022	44	51	1	96
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Apr 2022	79	58	3	140
May 2022	94	46	0	140
Jun 2022	74	38	4	116
Jul 2022	73	27	0	100
Aug 2022	92	38	3	133
Sep 2022	82	52	1	135
Oct 2022	95	31	5	131
Nov 2022	133	78	3	214
Dec 2022	81	45	2	128
Jan 2023	110	64	5	179
Feb 2023	110	44	2	156
Mar 2023	137	75	1	213
Apr 2023	103	52	0	155
May 2023	102	47	1	150
Jun 2023	120	37	0	157
Jul 2023	113	50	3	166
Aug 2023	104	38	4	146
Sep 2023	164	43	2	209
Oct 2023	307	51	4	362
Nov 2023	264	30	0	294
Dec 2023	103	45	3	151
Jan 2024	112	28	5	145
Feb 2024	108	46	1	155
Mar 2024	170	41	1	212
Apr 2024	135	36	7	178
May 2024	67	48	5	120
Jun 2024	59	32	2	93
Jul 2024	79	33	6	118
Aug 2024	99	26	4	129
Sep 2024	76	14	0	90
Oct 2024	122	31	5	158
Nov 2024	125	62	8	195
Dec 2024	147	36	6	189
Jan 2025	158	33	8	199
Feb 2025	183	26	6	215
Mar 2025	103	46	1	150
Apr 2025	117	42	1	160
May 2025	163	28	0	191
Jun 2025	126	27	0	153
Jul 2025	123	26	3	152
Aug 2025	171	28	5	204
Sep 2025	177	21	1	199
Oct 2025	110	44	2	156
Nov 2025	141	59	5	205
Dec 2025	24	17	1	42

Cumulative views and downloads (calculated since 29 Sep 2015)

Month	HTML	PDF	XML	Total
Sep 2015	20	26	1	47
Oct 2015	21	31	1	53
Nov 2015	7	10	0	17
Dec 2015	6	20	0	26
Jan 2016	20	18	0	38
Feb 2016	139	44	2	185
Mar 2016	46	32	0	78
Apr 2016	20	15	1	36
May 2016	20	18	5	43
Jun 2016	17	8	1	26
Jul 2016	14	11	3	28
Aug 2016	16	10	3	29
Sep 2016	26	19	3	48
Oct 2016	20	12	2	34
Nov 2016	19	17	1	37
Dec 2016	24	18	2	44
Jan 2017	36	24	3	63
Feb 2017	28	21	6	55
Mar 2017	42	36	7	85
Apr 2017	52	28	9	89
May 2017	62	31	14	107
Jun 2017	45	31	8	84
Jul 2017	32	22	2	56
Aug 2017	8	22	0	30
Sep 2017	14	20	1	35
Oct 2017	11	21	1	33
Nov 2017	13	30	0	43
Dec 2017	18	24	1	43
Jan 2018	17	35	0	52
Feb 2018	37	40	3	80
Mar 2018	24	49	0	73
Apr 2018	18	52	1	71
May 2018	25	44	1	70
Jun 2018	28	48	0	76
Jul 2018	16	56	1	73
Aug 2018	32	61	4	97
Sep 2018	20	36	1	57
Oct 2018	30	53	1	84
Nov 2018	26	47	0	73
Dec 2018	26	53	1	80
Jan 2019	20	41	0	61
Feb 2019	22	40	0	62
Mar 2019	23	63	0	86
Apr 2019	14	42	0	56
May 2019	10	28	1	39
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Aug 2019	148	48	0	196
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Oct 2019	154	32	1	187
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Dec 2019	23	29	0	52
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Mar 2022	59	54	2	115
Apr 2022	79	58	3	140
May 2022	94	46	0	140
Jun 2022	74	38	4	116
Jul 2022	73	27	0	100
Aug 2022	92	38	3	133
Sep 2022	82	52	1	135
Oct 2022	95	31	5	131
Nov 2022	133	78	3	214
Dec 2022	81	45	2	128
Jan 2023	110	64	5	179
Feb 2023	110	44	2	156
Mar 2023	137	75	1	213
Apr 2023	103	52	0	155
May 2023	102	47	1	150
Jun 2023	120	37	0	157
Jul 2023	113	50	3	166
Aug 2023	104	38	4	146
Sep 2023	164	43	2	209
Oct 2023	307	51	4	362
Nov 2023	264	30	0	294
Dec 2023	103	45	3	151
Jan 2024	112	28	5	145
Feb 2024	108	46	1	155
Mar 2024	170	41	1	212
Apr 2024	135	36	7	178
May 2024	67	48	5	120
Jun 2024	59	32	2	93
Jul 2024	79	33	6	118
Aug 2024	99	26	4	129
Sep 2024	76	14	0	90
Oct 2024	122	31	5	158
Nov 2024	125	62	8	195
Dec 2024	147	36	6	189
Jan 2025	158	33	8	199
Feb 2025	183	26	6	215
Mar 2025	103	46	1	150
Apr 2025	117	42	1	160
May 2025	163	28	0	191
Jun 2025	126	27	0	153
Jul 2025	123	26	3	152
Aug 2025	171	28	5	204
Sep 2025	177	21	1	199
Oct 2025	110	44	2	156
Nov 2025	141	59	5	205
Dec 2025	24	17	1	42

Latest update: 06 Dec 2025

Short summary

In this study, we describe and evaluate a new four-mode version of the Modal Aerosol Module (MAM4) in the Community Atmosphere Model version 5 (CAM5). Compared to the current three-mode version of MAM in CAM5, MAM4 significantly improves the simulation of seasonal variation of BC concentrations in the polar regions, by increasing the BC concentrations in all seasons and particularly in cold seasons.