Emissions of nitrogen oxides from US urban areas: estimation from Ozone Monitoring Instrument retrievals for 2005–2014

Lu, Z.; Streets, D. G.; de Foy, B.; Lamsal, L. N.; Duncan, B. N.; Xing, J.

doi:10.5194/acp-15-10367-2015

Articles | Volume 15, issue 18

https://doi.org/10.5194/acp-15-10367-2015

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

Special issue:

Ten years of Ozone Monitoring Instrument (OMI) observations...

https://doi.org/10.5194/acp-15-10367-2015

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

Articles | Volume 15, issue 18

Research article

|

21 Sep 2015

Research article |

| 21 Sep 2015

Emissions of nitrogen oxides from US urban areas: estimation from Ozone Monitoring Instrument retrievals for 2005–2014

Z. Lu, D. G. Streets, B. de Foy, L. N. Lamsal, B. N. Duncan, and J. Xing

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Jul 2015	27	32	6	65
Aug 2015	7	17	3	27
Sep 2015	121	99	21	241
Oct 2015	73	47	14	134
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Dec 2015	12	33	4	49
Jan 2016	50	34	2	86
Feb 2016	37	22	0	59
Mar 2016	31	26	0	57
Apr 2016	18	14	1	33
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Jun 2016	6	8	0	14
Jul 2016	8	6	3	17
Aug 2016	11	11	0	22
Sep 2016	13	8	0	21
Oct 2016	10	11	5	26
Nov 2016	9	9	7	25
Dec 2016	2	3	0	5
Jan 2017	17	23	0	40
Feb 2017	14	12	0	26
Mar 2017	19	8	2	29
Apr 2017	18	13	0	31
May 2017	24	18	0	42
Jun 2017	27	5	1	33
Jul 2017	24	16	0	40
Aug 2017	10	12	1	23
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Jun 2018	13	17	9	39
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Jan 2019	8	9	0	17
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Apr 2019	10	11	0	21
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Jan 2020	7	7	0	14
Feb 2020	8	7	1	16
Mar 2020	11	8	0	19
Apr 2020	12	10	0	22
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Jun 2020	21	7	0	28
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Apr 2023	18	19	0	37
May 2023	41	13	0	54
Jun 2023	41	6	0	47
Jul 2023	45	11	1	57
Aug 2023	49	12	2	63
Sep 2023	53	7	3	63
Oct 2023	64	13	1	78
Nov 2023	36	5	0	41
Dec 2023	72	16	3	91
Jan 2024	59	10	0	69
Feb 2024	54	10	1	65
Mar 2024	62	18	5	85
Apr 2024	56	24	4	84
May 2024	33	27	3	63
Jun 2024	34	18	3	55
Jul 2024	32	12	4	48
Aug 2024	52	13	2	67
Sep 2024	21	8	0	29
Oct 2024	38	8	0	46
Nov 2024	18	9	3	30
Dec 2024	19	8	3	30
Jan 2025	20	9	0	29
Feb 2025	31	16	0	47
Mar 2025	20	16	0	36
Apr 2025	32	23	3	58
May 2025	22	10	5	37
Jun 2025	41	12	0	53
Jul 2025	28	17	1	46
Aug 2025	42	17	3	62
Sep 2025	47	16	1	64
Oct 2025	40	27	0	67
Nov 2025	40	32	4	76
Dec 2025	56	24	2	82
Jan 2026	61	40	8	109
Feb 2026	11	2	1	14

Cumulative views and downloads (calculated since 28 May 2015)

Month	HTML	PDF	XML	Total
May 2015	51	79	4	134
Jun 2015	42	42	7	91
Jul 2015	27	32	6	65
Aug 2015	7	17	3	27
Sep 2015	121	99	21	241
Oct 2015	73	47	14	134
Nov 2015	53	50	7	110
Dec 2015	12	33	4	49
Jan 2016	50	34	2	86
Feb 2016	37	22	0	59
Mar 2016	31	26	0	57
Apr 2016	18	14	1	33
May 2016	13	15	0	28
Jun 2016	6	8	0	14
Jul 2016	8	6	3	17
Aug 2016	11	11	0	22
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Oct 2016	10	11	5	26
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Mar 2023	50	15	1	66
Apr 2023	18	19	0	37
May 2023	41	13	0	54
Jun 2023	41	6	0	47
Jul 2023	45	11	1	57
Aug 2023	49	12	2	63
Sep 2023	53	7	3	63
Oct 2023	64	13	1	78
Nov 2023	36	5	0	41
Dec 2023	72	16	3	91
Jan 2024	59	10	0	69
Feb 2024	54	10	1	65
Mar 2024	62	18	5	85
Apr 2024	56	24	4	84
May 2024	33	27	3	63
Jun 2024	34	18	3	55
Jul 2024	32	12	4	48
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Oct 2024	38	8	0	46
Nov 2024	18	9	3	30
Dec 2024	19	8	3	30
Jan 2025	20	9	0	29
Feb 2025	31	16	0	47
Mar 2025	20	16	0	36
Apr 2025	32	23	3	58
May 2025	22	10	5	37
Jun 2025	41	12	0	53
Jul 2025	28	17	1	46
Aug 2025	42	17	3	62
Sep 2025	47	16	1	64
Oct 2025	40	27	0	67
Nov 2025	40	32	4	76
Dec 2025	56	24	2	82
Jan 2026	61	40	8	109
Feb 2026	11	2	1	14

Latest update: 11 Feb 2026

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Short summary

Using an exponentially modified Gaussian method and taking into account the effect of wind on NO2 distributions, we estimate 3-year moving-average emissions of summertime NOx from 35 US urban areas directly from NO2 retrievals of the OMI during 2005−2014. Total OMI-derived NOx emissions over US urban areas decreased by 49%, consistent with reductions of 43, 49, and 44% in the bottom-up NOx emissions, the weak-wind OMI NO2 burdens, and the averaged NO2 concentrations, respectively.