Turbulence vertical structure of the boundary layer during the afternoon transition

Darbieu, C.; Lohou, F.; Lothon, M.; Vilà-Guerau de Arellano, J.; Couvreux, F.; Durand, P.; Pino, D.; Patton, E. G.; Nilsson, E.; Blay-Carreras, E.; Gioli, B.

doi:10.5194/acp-15-10071-2015

Articles | Volume 15, issue 17

https://doi.org/10.5194/acp-15-10071-2015

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

Special issue:

The Boundary-Layer Late Afternoon and Sunset Turbulence (BLLAST)...

https://doi.org/10.5194/acp-15-10071-2015

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

Articles | Volume 15, issue 17

Research article

|

09 Sep 2015

Research article |

| 09 Sep 2015

Turbulence vertical structure of the boundary layer during the afternoon transition

C. Darbieu, F. Lohou, M. Lothon, J. Vilà-Guerau de Arellano, F. Couvreux, P. Durand, D. Pino, E. G. Patton, E. Nilsson, E. Blay-Carreras, and B. Gioli

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Jan 2015	42	573	6	621
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Mar 2015	17	21	2	40
Apr 2015	44	6	2	52
May 2015	21	11	5	37
Jun 2015	9	4	2	15
Jul 2015	15	9	1	25
Aug 2015	8	6	3	17
Sep 2015	174	144	24	342
Oct 2015	64	36	2	102
Nov 2015	41	35	2	78
Dec 2015	18	28	0	46
Jan 2016	40	26	1	67
Feb 2016	48	31	1	80
Mar 2016	35	26	1	62
Apr 2016	16	11	0	27
May 2016	18	25	0	43
Jun 2016	9	8	2	19
Jul 2016	22	19	3	44
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Dec 2016	4	10	0	14
Jan 2017	23	15	1	39
Feb 2017	13	8	0	21
Mar 2017	25	19	1	45
Apr 2017	22	20	1	43
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Jun 2017	33	16	7	56
Jul 2017	21	19	0	40
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Oct 2017	14	17	1	32
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Feb 2018	11	13	1	25
Mar 2018	12	18	1	31
Apr 2018	10	19	0	29
May 2018	21	24	1	46
Jun 2018	14	21	0	35
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Nov 2018	19	20	1	40
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Nov 2019	6	16	0	22
Dec 2019	11	10	0	21
Jan 2020	15	8	0	23
Feb 2020	13	6	3	22
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Apr 2020	7	6	0	13
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Jun 2020	22	7	0	29
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Nov 2020	5	7	1	13
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Jan 2021	10	7	1	18
Feb 2021	20	5	1	26
Mar 2021	9	7	0	16
Apr 2021	15	10	0	25
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May 2023	34	14	0	48
Jun 2023	42	7	1	50
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Aug 2023	36	8	2	46
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Mar 2024	49	21	3	73
Apr 2024	41	12	5	58
May 2024	19	17	2	38
Jun 2024	37	14	1	52
Jul 2024	23	14	5	42
Aug 2024	14	6	5	25
Sep 2024	14	7	3	24
Oct 2024	23	11	1	35
Nov 2024	15	7	6	28
Dec 2024	27	25	0	52
Jan 2025	28	7	0	35
Feb 2025	41	8	0	49
Mar 2025	20	10	1	31
Apr 2025	24	16	0	40
May 2025	21	8	0	29
Jun 2025	53	17	2	72
Jul 2025	51	20	1	72
Aug 2025	49	23	9	81
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Oct 2025	31	30	0	61
Nov 2025	29	19	4	52
Dec 2025	37	26	0	63
Jan 2026	49	39	10	98
Feb 2026	33	20	2	55
Mar 2026	31	45	7	83
Apr 2026	8	14	0	22

Cumulative views and downloads (calculated since 22 Dec 2014)

Month	HTML	PDF	XML	Total
Dec 2014	57	406	7	470
Jan 2015	42	573	6	621
Feb 2015	19	38	0	57
Mar 2015	17	21	2	40
Apr 2015	44	6	2	52
May 2015	21	11	5	37
Jun 2015	9	4	2	15
Jul 2015	15	9	1	25
Aug 2015	8	6	3	17
Sep 2015	174	144	24	342
Oct 2015	64	36	2	102
Nov 2015	41	35	2	78
Dec 2015	18	28	0	46
Jan 2016	40	26	1	67
Feb 2016	48	31	1	80
Mar 2016	35	26	1	62
Apr 2016	16	11	0	27
May 2016	18	25	0	43
Jun 2016	9	8	2	19
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Dec 2016	4	10	0	14
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Feb 2017	13	8	0	21
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Dec 2024	27	25	0	52
Jan 2025	28	7	0	35
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Jun 2025	53	17	2	72
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Dec 2025	37	26	0	63
Jan 2026	49	39	10	98
Feb 2026	33	20	2	55
Mar 2026	31	45	7	83
Apr 2026	8	14	0	22

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Short summary

A case study of the BLLAST experiment is considered to explore the decay of turbulence that occurs in the convective boundary layer over land during the afternoon. Based on observations and on a large-eddy simulation, the analysis reveals two phases in the afternoon: a first quasi-stationary phase when the turbulent kinetic energy slowly decays without significant change in the turbulence structure and a second phase of more rapid decay with a change in spectral turbulence characteristics.