The transient variation in the complexes of the low-latitude ionosphere within the equatorial ionization anomaly region of Nigeria

Rabiu, A. B.; Ogunsua, B. O.; Fuwape, I. A.; Laoye, J. A.

doi:https://doi.org/10.5194/npg-22-527-2015

Articles | Volume 22, issue 5

https://doi.org/10.5194/npg-22-527-2015

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

https://doi.org/10.5194/npg-22-527-2015

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

Articles | Volume 22, issue 5

Research article

|

11 Sep 2015

Research article |

| 11 Sep 2015

The transient variation in the complexes of the low-latitude ionosphere within the equatorial ionization anomaly region of Nigeria

A. B. Rabiu, B. O. Ogunsua, I. A. Fuwape, and J. A. Laoye

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Final revised paper (published on 11 Sep 2015)
Preprint (discussion started on 05 Dec 2014)

Interactive discussion

Status: closed

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

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RC C753: 'Review', Unnikrishnan Kaleekkal, 01 Jan 2015
- SC C881: 'Response to the first referee report #1 on the paper titiled: “The Transient Variation of the Complexes of the Low Latitude Ionosphere within the Equatorial Ionization Anomaly Region of Nigeria”.', Babalola Ogunsua, 30 Jan 2015
RC C769: '‘The Transient Variation of the Complexes of the Low Latitude Ionosphere within the Equatorial Ionization Anomaly Region of Nigeria’', Anonymous Referee #2, 12 Jan 2015
- SC C887: 'Response to comments from anonymous Referee 1 (report #2)', Babalola Ogunsua, 30 Jan 2015
RC C796: 'Review', Anonymous Referee #3, 13 Jan 2015
- SC C889: 'INTRACTIVE RESPONSE TO THE COMMENT BY ANONYMOUS REFEREE #2 (REPORT 3) ON THE PAPER TITLED “THE TRANSIEN VARIAITON OF IONOSPHERIC COMPLEXES OF THE LOW LATITUDE WITHIN THE EQUATORIAL IONIZATION ANOMALY REGION OFNIGERIA” BY A. B. RABIU ET AL.', Babalola Ogunsua, 30 Jan 2015
AC C911: '', Babalola Ogunsua, 12 Feb 2015
AC C918: '', Babalola Ogunsua, 12 Feb 2015
AC C923: '', Babalola Ogunsua, 12 Feb 2015
AC C928: '', Babalola Ogunsua, 12 Feb 2015

Peer-review completion

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

AR by Babalola Ogunsua on behalf of the Authors (04 Mar 2015) Author's response

ED: Reconsider after major revisions (further review by Editor and Referees) (06 Apr 2015) by A. Surjalal Sharma (deceased)

AR by Babalola Ogunsua on behalf of the Authors (17 May 2015) Author's response Manuscript

ED: Referee Nomination & Report Request started (05 Jun 2015) by A. Surjalal Sharma (deceased)

RR by Anonymous Referee #4 (16 Jun 2015)

Suggestions for revision or reasons for rejection

The main result of the manuscript,”The Transient Variation of the Complexes of the Low Latitude Ionosphere within the 19 Equatorial Ionization Anomaly Region of Nigeria” is primarily the seasonal variations in the Lyapunov exponent and Tsallis entropy wherein equinoctial troughs are observed in these two parameters calculated based on the TEC time series data over African sector. In order to reach here, the authors have discussed many things that are repeated and basic in nature and have already been written in the past by them as well as other authors. For example, the (tutorial) sections on Lyapunov exponents, Correlation dimension, Tsallis entropy etc. all are not needed. The authors need to be focused in stating the problem and where it differs from the earlier works (e.g. the works of Unnikrishnan and Ogunsua, 2014). Although this is now addressed in this modified version, this will be more effective if these arguments are used to pose the problem in the beginning itself. The manuscript has many grammatical mistakes and need to be checked critically. The scientific sections related to ionospheric physics (like Lines 152-168) are very loosely written. The conclusion section is too big and one should be precise here.

It would be more interesting if the authors focus on the semiannual variation in the Lyapunov exponent and Tsallis entropy and provide physical insight. Note, semiannual variation in TEC over low latitudes is well known. Why one sees semiannual variations in these exponents as well? This must be addressed. Further, when the authors try to extract the fluctuations in TEC by detrending the large (temporal) scale TEC variations, should they not discuss the biases/noises in the TEC measurements as well? One must be careful to attribute the TEC fluctuations to the internal dynamics of the ionosphere when some of these fluctuations can be due to instruments as well. The authors need to discuss and address this issue.

Therefore, I would advise the authors to remove the unnecessary redundancies, focus on the main goal and bring in physical insights. This requires a drastic overhaul but may be worth doing it.

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RR by Anonymous Referee #1 (07 Jul 2015)

ED: Publish subject to minor revisions (further review by Editor) (11 Aug 2015) by A. Surjalal Sharma (deceased)

AR by Babalola Ogunsua on behalf of the Authors (16 Aug 2015) Author's response Manuscript

ED: Publish subject to minor revisions (further review by Editor) (22 Aug 2015) by A. Surjalal Sharma (deceased)

AR by Babalola Ogunsua on behalf of the Authors (23 Aug 2015) Author's response Manuscript

ED: Publish as is (25 Aug 2015) by A. Surjalal Sharma (deceased)

AR by Babalola Ogunsua on behalf of the Authors (26 Aug 2015)

Short summary

This paper describes chaos and dynamical complexity to reveal the state of the underlying dynamics of the ionosphere on a daily basis. This is to show the daily/transient variations of chaoticity and dynamical complexity so as to reveal the degree of changes that occur in the ionospheric process and dynamics from one day to another. This paper will point the space science community in the direction of the use of chaoticity and dynamical complexity as indices to describe the process and dynamics.