HESS Opinions: Beyond the long-term water balance:  evolving Budyko's supply–demand framework for the  Anthropocene towards a global synthesis of land-surface  fluxes under natural and human-altered watersheds

A. Sankarasubramanian,; Wang, Dingbao; Archfield, Stacey; Reitz, Meredith; Vogel, Richard M.; Mazrooei, Amirhossein; Mukhopadhyay, Sudarshana

doi:https://doi.org/10.5194/hess-24-1975-2020

Articles | Volume 24, issue 4

https://doi.org/10.5194/hess-24-1975-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

HESS Opinions 2020

https://doi.org/10.5194/hess-24-1975-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 4

Opinion article

|

17 Apr 2020

Opinion article |

| 17 Apr 2020

HESS Opinions: Beyond the long-term water balance: evolving Budyko's supply–demand framework for the Anthropocene towards a global synthesis of land-surface fluxes under natural and human-altered watersheds

A. Sankarasubramanian, Dingbao Wang, Stacey Archfield, Meredith Reitz, Richard M. Vogel, Amirhossein Mazrooei, and Sudarshana Mukhopadhyay

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Final revised paper (published on 17 Apr 2020)
Supplement to the final revised paper
Preprint (discussion started on 13 Sep 2019)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

SC1: 'Some queries', Wouter Berghuijs, 19 Sep 2019
- AC1: 'Response to the review', A Sankarasubramanian, 09 Jan 2020
RC1: 'See attached report', Anonymous Referee #1, 24 Oct 2019
- AC2: 'Response - Reviewer-1', A Sankarasubramanian, 09 Jan 2020
RC2: 'Review of Sankarasubramanian et al.', Anonymous Referee #2, 27 Oct 2019
- AC3: 'Response - Reviewer-2', A Sankarasubramanian, 09 Jan 2020

Peer-review completion

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

ED: Publish subject to revisions (further review by editor and referees) (16 Jan 2020) by Erwin Zehe

Dear Dr. Sankarasubramanian,

I had a close look at your manuscript, the two reviews and your corresponding responses. In line with both reviewers and Wouter Berghuijs I think that the proposed opinion is valuable and deserves to be published in HESS. However, prior to this I strongly recommend addressing the main points of the reviews and of the scientific comment with great care within a round of revisions.

In line with reviewer 1 I recommend removal of figure 6, simply because H and LE are subject to different demands and both fluxes are driven by different physics! The purpose of LE is to deplete the saturation deficit of the atmospheric boundary layer (ABL) and establish a minimum free energy state. So the demand is the saturation deficit integrated over the ABL. The general purpose of H is the generally the same, establishing a maximum entropy state, but with respect to corresponding temperature gradient in the ABL. To me it does hence not make sense to link these two variables in the proposed extended Budyko framework.

In line with Wouter Berghuijs I like the transfer of the Budyko concept to infiltration and storage. The soil demand for infiltration is however not the storage capacity but the storage deficit from thermodynamic equilibrium/ soil hydraulic equilibrium storage as recently argued in one of my own publications in HESS (Zehe et al. 2019). In this context I thank that you should consider the danger of introducing spurious correlations at little more seriously.

Best regards,

Erwin Zehe

References:
Zehe, E., Loritz, R., Jackisch, C., Westhoff, M., Kleidon, A., Blume, T., Hassler, S. K., and Savenije, H. H.: Energy states of soil water - a thermodynamic perspective on soil water dynamics and storage-controlled streamflow, Hydrology And Earth System Sciences, 23, 971-987, 10.5194/hess-23-971-2019, 2019.

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AR by A Sankarasubramanian on behalf of the Authors (05 Feb 2020) Author's response Manuscript

ED: Referee Nomination & Report Request started (18 Feb 2020) by Erwin Zehe

RR by Anonymous Referee #1 (06 Mar 2020)

RR by Anonymous Referee #2 (17 Mar 2020)

ED: Publish subject to technical corrections (20 Mar 2020) by Erwin Zehe

AR by A Sankarasubramanian on behalf of the Authors (23 Mar 2020) Author's response Manuscript

Short summary

The Budyko framework which relies on the supply and demand concept could be effectively adapted and extended to quantify the role of drivers – both changing climate and local human disturbances – in altering the land-surface response. This framework is extended with a few illustrative examples for quantifying the variability in land-surface fluxes for natural and human-altered watersheds. Potential for using observed and remotely sensed datasets in capturing this variability is also discussed.