Estimating evaporation with thermal UAV data and two-source energy balance models

Hoffmann, H.; Nieto, H.; Jensen, R.; Guzinski, R.; Zarco-Tejada, P.; Friborg, T.

doi:https://doi.org/10.5194/hess-20-697-2016

Articles | Volume 20, issue 2

https://doi.org/10.5194/hess-20-697-2016

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

https://doi.org/10.5194/hess-20-697-2016

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

Articles | Volume 20, issue 2

Research article

|

12 Feb 2016

Research article |

| 12 Feb 2016

Estimating evaporation with thermal UAV data and two-source energy balance models

H. Hoffmann, H. Nieto, R. Jensen, R. Guzinski, P. Zarco-Tejada, and T. Friborg

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Final revised paper (published on 12 Feb 2016)
Preprint (discussion started on 06 Aug 2015)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC C3343: 'Review of „Estimating evapotranspiration with thermal UAV data and two source energy balance models“ by Hoffmann et al.', Anonymous Referee #1, 27 Aug 2015
- AC C3881: 'Response to anonymous referee#1', Helene Hoffmann, 28 Sep 2015
RC C4260: 'Review hess-2015-266', Nicolaas van de Giesen, 15 Oct 2015
- AC C4682: 'Answer to referee#2', Helene Hoffmann, 06 Nov 2015

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Reconsider after major revisions (15 Oct 2015) by Alexander Loew (deceased)

AR by Helene Hoffmann on behalf of the Authors (19 Nov 2015) Author's response Manuscript

ED: Referee Nomination & Report Request started (03 Dec 2015) by Alexander Loew (deceased)

RR by Nick van de Giesen (05 Dec 2015)

RR by Anonymous Referee #1 (17 Dec 2015)

Suggestions for revision or reasons for rejection

Second review of „ Estimating evaporation with thermal UAV data and two source energy balance models “ by Hoffmann et al.

The authors have extensively reworked their manuscript and have appropriately considered most my comments as well as the comments of the other reviewer. I believe the study is a nice contribution to potential use of UAV data for high resolution latent heat flux estimation. However, I have listed some remaining minor issues which should be considered. Therefore, I can recommend the publication of this work after minor revision.

Remaining issues:

P1L17: Here past tense should be used (i.e. “…was mounted…”). Please check for correct tense through the MS.

P1L24: “…have already been…”

P1L25: “The aim of this study…”

P3L7: Wrong citation because you are not referring to the original ETp model of Priestly and Taylor. You could cite e.g. Norman et al. (2000) instead.

P5L1: “The site was cultivated with barley during the UAV campaigns.”

P5L1-7: This section is confused and needs stylistic and grammatical revision. Available soil water should be presented in mm/dm.

P7L7-9: I think that this statement is wrong. The P-T approx. enables to calculate sensible heat flux using estimates of net radiation divergence (see Norman et al., 2000).

P7L11-18: This section needs revision (e.g. removal of repetitions)

P8L4-8: First all variables should be introduced before additional information on measurements is given.

P8L22-23: What is the actual LAI range?

P8L29: “…from the…”

P9L9: Shouldn’t T_R be dependent from the view zenith angle as in Eq. 4?

P9:18-25: You should always write full sentences.

P11L28: delete “J B”

P12L13 Chapter 3.1 is quite long and should be separated in subchapters to increase clarity.

P13L4-5: Inappropriate formulation.

P13L14: Refer to a table of figure.

P13L14: I guess r indicates the correlation coefficient? Please clearify.

P14L5: “appears” instead of “is seen”

P16L9: “However, …”

P16L12: “.”

P18L3: “… might further improve the modelling results”

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ED: Publish subject to minor revisions (Editor review) (28 Dec 2015) by Alexander Loew (deceased)

AR by Helene Hoffmann on behalf of the Authors (07 Jan 2016) Author's response Manuscript

ED: Publish as is (22 Jan 2016) by Alexander Loew (deceased)

AR by Helene Hoffmann on behalf of the Authors (22 Jan 2016)

Short summary

Thermal images collected with an unmanned aerial vehicle (UAV) are applied to algorithms originally developed to be operational with satellite images, in order to estimate evapotranspiration in very high resolution. It is concluded that the thermal UAV data can be used for model input and for other potential applications requiring good quality, consistent, and high resolution land surface temperature.