Articles | Volume 12, issue 3
© Author(s) 2021. This work is distributed underthe Creative Commons Attribution 4.0 License.
Multiscale fractal dimension analysis of a reduced order model of coupled ocean–atmosphere dynamics
- Final revised paper (published on 06 Aug 2021)
- Supplement to the final revised paper
- Preprint (discussion started on 13 Jan 2021)
Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor |
: Report abuse
RC1: 'Comment on esd-2020-96', Anonymous Referee #1, 09 Feb 2021
- AC1: 'Authors' short reply on RC1', Tommaso Alberti, 19 Feb 2021
RC2: 'Comment on esd-2020-96', Anonymous Referee #2, 01 Mar 2021
- AC2: 'Reply on RC2', Tommaso Alberti, 15 Mar 2021
Peer review completion
AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (10 Apr 2021) by Rui A. P. Perdigão
AR by Tommaso Alberti on behalf of the Authors (11 May 2021)  Author's response Author's tracked changes Manuscript
ED: Referee Nomination & Report Request started (14 May 2021) by Rui A. P. Perdigão
RR by Anonymous Referee #1 (24 May 2021)
RR by Anonymous Referee #2 (31 May 2021)
ED: Publish subject to minor revisions (review by editor) (11 Jun 2021) by Rui A. P. Perdigão
AR by Tommaso Alberti on behalf of the Authors (21 Jun 2021)  Author's response Author's tracked changes Manuscript
ED: Publish as is (05 Jul 2021) by Rui A. P. Perdigão
The work by Alberti et al. is a very intensive and information paper. It shows how to model Atmosphere and ocean dynamics within the scope of ESD. The authors extended the concept of multiscale generalized fractal dimensions employing Multivariate Empirical Mode Decomposition to analyze multiscale and multivariate behavior of the ocean-atmosphere coupled dynamics. Although the concept is not new to the scientific community, it is interesting to know how such a process is applicable for elucidating atmospheric behavior. The one important thing is that they tried to give more credits to the relevant works as much as possible.
The paper is well written with proper usage of English and scientific jargon. However, for the general audience, some of the terminologies need to be explained simpler. For example, the readers may not necessarily need to know about the Hausdorff dimension.
Although they are making some valid assumptions in the methodology, some statements are a bit confusing. For instance, the authors mentioned that mathematical properties of completeness, convergence, linearity, and stationarity are usually not met when real-world geophysical data are analyzed. But it is not clear the reason behind this and what makes the use of adaptive methods. How is the complexity of data suitable for such methods?. Likewise, while the shifting process needs careful implementation for multivariate techniques, Mandic (2010) proposed an alternative way to cubic spline interpolation in each direction with a quasi-Monte Carlo-based approach. But the reviewer does not fully agree with it as such interpolation may lose the data's intrinsic properties since this approach produces smoother dynamics that do not exist in the data.
The authors tried to interpret most of the results efficiently. However, some of the interpretation is very unclear and hard to follow. For example, the authors did not mention what is the physical meaning behind the correlation dimension. It is just a kind of statistics of the data. Without understanding the physical meaning, it is not clear why it is a function of time. Another issue is that some of the figures are not interpreted well. e.g., the description of Figures 5 and 6 are not marched. They are not clear, as seen in the figures. For the general audience, they are confusing. Even though the multiscale correlation dimension for each MIMF decreases with an increasing timescale, as seen in panel (a), the other two panels are not well elaborated.
The authors cleverly described the experiments. To reproduce the work, one needs to understand all the mathematical formulas. In the scientific method, some time calculation and mathematical expression do not match as most of the calculation prcedure follow fundamental statistical programming. It needs a concise explanation of calculating all these quantities like system attractors, phase space, and correlation dimensions. The description of these quantities introduced in the manuscript is very dubious and complex o replicate.
The reviewer is thankful for providing data sets. But it becomes worthy if it includes an explanation of how to reanalyze these data sets.
Finally, the reviewer appreciates the work of the authors. Still, it needs a bit more simplification and incorporating the issues mentioned above.