Dominant controls of transpiration along a hillslope transect inferred from ecohydrological measurements and thermodynamic limits

Renner, Maik; Hassler, Sibylle K.; Blume, Theresa; Weiler, Markus; Hildebrandt, Anke; Guderle, Marcus; Schymanski, Stanislaus J.; Kleidon, Axel

doi:https://doi.org/10.5194/hess-20-2063-2016

Articles | Volume 20, issue 5

https://doi.org/10.5194/hess-20-2063-2016

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

https://doi.org/10.5194/hess-20-2063-2016

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

Articles | Volume 20, issue 5

Research article

|

25 May 2016

Research article |

| 25 May 2016

Dominant controls of transpiration along a hillslope transect inferred from ecohydrological measurements and thermodynamic limits

Maik Renner, Sibylle K. Hassler, Theresa Blume, Markus Weiler, Anke Hildebrandt, Marcus Guderle, Stanislaus J. Schymanski, and Axel Kleidon

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Dec 2022	16	11	0	27
Jan 2023	23	18	5	46
Feb 2023	13	9	2	24
Mar 2023	26	5	0	31
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Jun 2023	36	6	2	44
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Mar 2024	12	20	1	33
Apr 2024	13	6	3	22
May 2024	30	9	7	46
Jun 2024	27	11	2	40
Jul 2024	27	12	5	44
Aug 2024	34	4	3	41
Sep 2024	17	21	1	39
Oct 2024	23	10	0	33
Nov 2024	20	10	6	36
Dec 2024	22	7	1	30
Jan 2025	32	14	3	49
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Mar 2025	32	26	2	60
Apr 2025	22	12	0	34
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Jun 2025	58	16	0	74
Jul 2025	34	18	3	55
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Oct 2025	21	23	1	45
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Cumulative views and downloads (calculated since 18 Jan 2016)

Month	HTML	PDF	XML	Total
Jan 2016	65	19	0	84
Feb 2016	60	32	4	96
Mar 2016	34	4	0	38
Apr 2016	27	7	0	34
May 2016	221	76	0	297
Jun 2016	92	24	4	120
Jul 2016	23	10	1	34
Aug 2016	15	6	1	22
Sep 2016	21	7	0	28
Oct 2016	26	10	1	37
Nov 2016	12	6	0	18
Dec 2016	7	5	0	12
Jan 2017	22	13	0	35
Feb 2017	13	5	0	18
Mar 2017	32	14	3	49
Apr 2017	33	8	4	45
May 2017	32	27	4	63
Jun 2017	32	24	8	64
Jul 2017	22	19	4	45
Aug 2017	12	20	8	40
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Oct 2017	9	12	19	40
Nov 2017	18	23	19	60
Dec 2017	15	30	16	61
Jan 2018	24	29	12	65
Feb 2018	31	28	19	78
Mar 2018	24	42	17	83
Apr 2018	17	41	20	78
May 2018	22	33	11	66
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Jul 2018	21	44	23	88
Aug 2018	27	26	18	71
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Oct 2018	20	23	22	65
Nov 2018	20	31	31	82
Dec 2018	9	29	20	58
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Feb 2019	9	19	13	41
Mar 2019	9	17	17	43
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Jan 2023	23	18	5	46
Feb 2023	13	9	2	24
Mar 2023	26	5	0	31
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Nov 2023	13	1	0	14
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Jan 2024	16	11	0	27
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Apr 2024	13	6	3	22
May 2024	30	9	7	46
Jun 2024	27	11	2	40
Jul 2024	27	12	5	44
Aug 2024	34	4	3	41
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Oct 2024	23	10	0	33
Nov 2024	20	10	6	36
Dec 2024	22	7	1	30
Jan 2025	32	14	3	49
Feb 2025	42	15	2	59
Mar 2025	32	26	2	60
Apr 2025	22	12	0	34
May 2025	21	3	0	24
Jun 2025	58	16	0	74
Jul 2025	34	18	3	55
Aug 2025	55	26	1	82
Sep 2025	72	13	2	87
Oct 2025	21	23	1	45
Nov 2025	11	5	0	16

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Short summary

We estimated forest transpiration (European beech) along a steep valley cross section. Atmospheric demand, obtained by the thermodynamic limit of maximum power, is the dominant control of transpiration at all sites. To our surprise we find that transpiration is rather similar across sites with different aspect (north vs. south) and different stand structure due to systematically varying sap velocities. Such a compensation effect is highly relevant for modeling and upscaling of transpiration.