Characteristics and sources of gravity waves observed in noctilucent cloud over Norway

Demissie, T. D.; Espy, P. J.; Kleinknecht, N. H.; Hatlen, M.; Kaifler, N.; Baumgarten, G.

doi:10.5194/acp-14-12133-2014

Articles | Volume 14, issue 22

https://doi.org/10.5194/acp-14-12133-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-14-12133-2014

© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 14, issue 22

Research article

|

18 Nov 2014

Research article |

| 18 Nov 2014

Characteristics and sources of gravity waves observed in noctilucent cloud over Norway

T. D. Demissie, P. J. Espy, N. H. Kleinknecht, M. Hatlen, N. Kaifler, and G. Baumgarten

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Month	HTML	PDF	XML	Total
Nov 2013	98	43	0	141
Dec 2013	26	22	0	48
Jan 2014	19	11	0	30
Feb 2014	20	17	2	39
Mar 2014	16	10	0	26
Apr 2014	6	10	0	16
May 2014	9	13	0	22
Jun 2014	13	6	0	19
Jul 2014	15	4	1	20
Aug 2014	7	12	1	20
Sep 2014	5	6	3	14
Oct 2014	9	7	2	18
Nov 2014	85	82	11	178
Dec 2014	27	614	1	642
Jan 2015	11	534	0	545
Feb 2015	24	35	0	59
Mar 2015	19	15	1	35
Apr 2015	24	5	0	29
May 2015	15	19	2	36
Jun 2015	33	8	3	44
Jul 2015	27	9	1	37
Aug 2015	9	8	2	19
Sep 2015	2	21	0	23
Oct 2015	20	37	0	57
Nov 2015	33	15	3	51
Dec 2015	8	16	0	24
Jan 2016	35	11	1	47
Feb 2016	23	10	1	34
Mar 2016	18	6	0	24
Apr 2016	3	2	0	5
May 2016	10	8	0	18
Jun 2016	7	2	0	9
Jul 2016	10	2	3	15
Aug 2016	9	0	9
Sep 2016	10	0	10
Oct 2016	11	2	0	13
Nov 2016	7	0	7
Dec 2016	2	2	1	5
Jan 2017	17	2	7	26
Feb 2017	10	1	6	17
Mar 2017	15	2	11	28
Apr 2017	20	1	8	29
May 2017	22	5	12	39
Jun 2017	15	10	25
Jul 2017	15	1	3	19
Aug 2017	13	14	3	30
Sep 2017	8	13	0	21
Oct 2017	8	9	0	17
Nov 2017	16	9	0	25
Dec 2017	8	12	0	20
Jan 2018	7	7	0	14
Feb 2018	9	11	1	21
Mar 2018	12	20	0	32
Apr 2018	6	19	0	25
May 2018	15	15	1	31
Jun 2018	4	16	0	20
Jul 2018	6	19	0	25
Aug 2018	11	23	0	34
Sep 2018	25	16	5	46
Oct 2018	18	22	3	43
Nov 2018	18	20	2	40
Dec 2018	5	13	2	20
Jan 2019	8	10	1	19
Feb 2019	6	5	0	11
Mar 2019	7	9	0	16
Apr 2019	10	14	0	24
May 2019	7	6	0	13
Jun 2019	4	11	0	15
Jul 2019	3	15	0	18
Aug 2019	4	12	1	17
Sep 2019	3	15	0	18
Oct 2019	10	18	0	28
Nov 2019	2	6	0	8
Dec 2019	4	8	0	12
Jan 2020	15	7	1	23
Feb 2020	7	0	7
Mar 2020	4	2	0	6
Apr 2020	2	5	0	7
May 2020	3	4	0	7
Jun 2020	16	4	1	21
Jul 2020	25	11	7	43
Aug 2020	10	6	5	21
Sep 2020	7	7	0	14
Oct 2020	6	7	1	14
Nov 2020	5	4	1	10
Dec 2020	2	7	0	9
Jan 2021	13	11	0	24
Feb 2021	3	3	0	6
Mar 2021	3	6	0	9
Apr 2021	5	8	0	13
May 2021	9	5	1	15
Jun 2021	3	7	0	10
Jul 2021	5	7	0	12
Aug 2021	8	7	0	15
Sep 2021	11	6	0	17
Oct 2021	2	32	1	35
Nov 2021	10	26	0	36
Dec 2021	7	8	1	16
Jan 2022	6	11	0	17
Feb 2022	6	8	1	15
Mar 2022	5	3	0	8
Apr 2022	3	2	1	6
May 2022	4	2	0	6
Jun 2022	5	1	1	7
Jul 2022	2	2	0	4
Aug 2022	8	8	0	16
Sep 2022	3	1	0	4
Oct 2022	7	11	0	18
Nov 2022	8	7	1	16
Dec 2022	6	1	1	8
Jan 2023	9	10	2	21
Feb 2023	9	6	0	15
Mar 2023	10	8	2	20
Apr 2023	2	2	0	4
May 2023	31	10	1	42
Jun 2023	31	8	1	40
Jul 2023	40	6	2	48
Aug 2023	37	8	2	47
Sep 2023	39	6	1	46
Oct 2023	40	2	1	43
Nov 2023	29	2	0	31
Dec 2023	45	8	3	56
Jan 2024	39	14	0	53
Feb 2024	36	5	0	41
Mar 2024	47	11	1	59
Apr 2024	42	14	5	61
May 2024	13	12	2	27
Jun 2024	11	17	1	29
Jul 2024	12	22	2	36
Aug 2024	28	20	2	50
Sep 2024	9	16	0	25
Oct 2024	14	16	0	30
Nov 2024	10	12	2	24
Dec 2024	6	17	2	25
Jan 2025	22	11	0	33
Feb 2025	32	6	5	43
Mar 2025	15	11	0	26
Apr 2025	13	14	2	29
May 2025	18	4	0	22
Jun 2025	48	4	0	52
Jul 2025	27	10	2	39
Aug 2025	34	14	0	48
Sep 2025	31	11	2	44
Oct 2025	18	17	2	37
Nov 2025	14	10	3	27

Cumulative views and downloads (calculated since 08 Nov 2013)

Month	HTML	PDF	XML	Total
Nov 2013	98	43	0	141
Dec 2013	26	22	0	48
Jan 2014	19	11	0	30
Feb 2014	20	17	2	39
Mar 2014	16	10	0	26
Apr 2014	6	10	0	16
May 2014	9	13	0	22
Jun 2014	13	6	0	19
Jul 2014	15	4	1	20
Aug 2014	7	12	1	20
Sep 2014	5	6	3	14
Oct 2014	9	7	2	18
Nov 2014	85	82	11	178
Dec 2014	27	614	1	642
Jan 2015	11	534	0	545
Feb 2015	24	35	0	59
Mar 2015	19	15	1	35
Apr 2015	24	5	0	29
May 2015	15	19	2	36
Jun 2015	33	8	3	44
Jul 2015	27	9	1	37
Aug 2015	9	8	2	19
Sep 2015	2	21	0	23
Oct 2015	20	37	0	57
Nov 2015	33	15	3	51
Dec 2015	8	16	0	24
Jan 2016	35	11	1	47
Feb 2016	23	10	1	34
Mar 2016	18	6	0	24
Apr 2016	3	2	0	5
May 2016	10	8	0	18
Jun 2016	7	2	0	9
Jul 2016	10	2	3	15
Aug 2016	9	0	9
Sep 2016	10	0	10
Oct 2016	11	2	0	13
Nov 2016	7	0	7
Dec 2016	2	2	1	5
Jan 2017	17	2	7	26
Feb 2017	10	1	6	17
Mar 2017	15	2	11	28
Apr 2017	20	1	8	29
May 2017	22	5	12	39
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Jul 2017	15	1	3	19
Aug 2017	13	14	3	30
Sep 2017	8	13	0	21
Oct 2017	8	9	0	17
Nov 2017	16	9	0	25
Dec 2017	8	12	0	20
Jan 2018	7	7	0	14
Feb 2018	9	11	1	21
Mar 2018	12	20	0	32
Apr 2018	6	19	0	25
May 2018	15	15	1	31
Jun 2018	4	16	0	20
Jul 2018	6	19	0	25
Aug 2018	11	23	0	34
Sep 2018	25	16	5	46
Oct 2018	18	22	3	43
Nov 2018	18	20	2	40
Dec 2018	5	13	2	20
Jan 2019	8	10	1	19
Feb 2019	6	5	0	11
Mar 2019	7	9	0	16
Apr 2019	10	14	0	24
May 2019	7	6	0	13
Jun 2019	4	11	0	15
Jul 2019	3	15	0	18
Aug 2019	4	12	1	17
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Oct 2019	10	18	0	28
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Mar 2020	4	2	0	6
Apr 2020	2	5	0	7
May 2020	3	4	0	7
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Jul 2020	25	11	7	43
Aug 2020	10	6	5	21
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Oct 2020	6	7	1	14
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Dec 2020	2	7	0	9
Jan 2021	13	11	0	24
Feb 2021	3	3	0	6
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Apr 2021	5	8	0	13
May 2021	9	5	1	15
Jun 2021	3	7	0	10
Jul 2021	5	7	0	12
Aug 2021	8	7	0	15
Sep 2021	11	6	0	17
Oct 2021	2	32	1	35
Nov 2021	10	26	0	36
Dec 2021	7	8	1	16
Jan 2022	6	11	0	17
Feb 2022	6	8	1	15
Mar 2022	5	3	0	8
Apr 2022	3	2	1	6
May 2022	4	2	0	6
Jun 2022	5	1	1	7
Jul 2022	2	2	0	4
Aug 2022	8	8	0	16
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Nov 2022	8	7	1	16
Dec 2022	6	1	1	8
Jan 2023	9	10	2	21
Feb 2023	9	6	0	15
Mar 2023	10	8	2	20
Apr 2023	2	2	0	4
May 2023	31	10	1	42
Jun 2023	31	8	1	40
Jul 2023	40	6	2	48
Aug 2023	37	8	2	47
Sep 2023	39	6	1	46
Oct 2023	40	2	1	43
Nov 2023	29	2	0	31
Dec 2023	45	8	3	56
Jan 2024	39	14	0	53
Feb 2024	36	5	0	41
Mar 2024	47	11	1	59
Apr 2024	42	14	5	61
May 2024	13	12	2	27
Jun 2024	11	17	1	29
Jul 2024	12	22	2	36
Aug 2024	28	20	2	50
Sep 2024	9	16	0	25
Oct 2024	14	16	0	30
Nov 2024	10	12	2	24
Dec 2024	6	17	2	25
Jan 2025	22	11	0	33
Feb 2025	32	6	5	43
Mar 2025	15	11	0	26
Apr 2025	13	14	2	29
May 2025	18	4	0	22
Jun 2025	48	4	0	52
Jul 2025	27	10	2	39
Aug 2025	34	14	0	48
Sep 2025	31	11	2	44
Oct 2025	18	17	2	37
Nov 2025	14	10	3	27

Latest update: 18 Nov 2025

Short summary

Summertime gravity waves detected in noctilucent clouds (NLCs) between 64◦ and 74◦N are found to have a similar climatology to those observed between 60◦ and 64◦N, and their direction of propagation is to the north and northeast as observed south of 64◦N. However, a unique population of fast, short wavelength waves propagating towards the SW is observed in the NLC. The sources of the prominent wave structures observed in the NLC are likely to be from waves propagating from near the tropopause.