Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements

Wang, Yuke; Shulga, Valerii; Milinevsky, Gennadi; Patoka, Aleksey; Evtushevsky, Oleksandr; Klekociuk, Andrew; Han, Wei; Grytsai, Asen; Shulga, Dmitry; Myshenko, Valery; Antyufeyev, Oleksandr

doi:https://doi.org/10.5194/acp-19-10303-2019

Articles | Volume 19, issue 15

https://doi.org/10.5194/acp-19-10303-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-19-10303-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 15

Research article

|

14 Aug 2019

Research article |

| 14 Aug 2019

Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements

Yuke Wang, Valerii Shulga, Gennadi Milinevsky, Aleksey Patoka, Oleksandr Evtushevsky, Andrew Klekociuk, Wei Han, Asen Grytsai, Dmitry Shulga, Valery Myshenko, and Oleksandr Antyufeyev

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Final revised paper (published on 14 Aug 2019)
Supplement to the final revised paper
Preprint (discussion started on 07 Feb 2019)

Interactive discussion

Status: closed

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

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RC1: 'REVIEW OF Wang et al.: Winter 2018 sudden stratospheric warming... (ACP 1361)', Anonymous Referee #1, 07 Feb 2019
RC2: 'Comments on “Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements” by Yuke Wang, Valery Shulga, Gennadi Milinevsky, et al. (2019).', Anonymous Referee #2, 16 Feb 2019
AC1: 'Final author comments as response to Referees comments and corrected text of manuscript and Supplement', Gennadi Milinevsky, 18 May 2019

Peer-review completion

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

AR by Gennadi Milinevsky on behalf of the Authors (18 May 2019) Author's response Manuscript

ED: Referee Nomination & Report Request started (22 May 2019) by Farahnaz Khosrawi

RR by Anonymous Referee #2 (31 May 2019)

Suggestions for revision or reasons for rejection

Comments on "Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements" by Yuke Wang, Valerri Shulga, Gennadi Milinevsky, et al. (2019).

The general quality of the revised manuscript is greatly improved, compared with the original version. I only have very tiny minor comments this time that should be corrected before publication.

P42: "each two years", better to say "every other year"
P76: "following" or "followed by"? I guess the latter.
P266: Add "a" before "characteristic".
P273: What is "the opposite tendency with the stratospheric CO abundance increase"? Why not directly say "A decrease in the stratospheric CO abundance"?
P276: It is hard for me to understand "descend up". Do you mean "down" rather than "up"?
P281: What is "by vertical"? A typo?
P283: Better to say "shift between A and B" than "shift in A and B"?
P293: "Return to" is weird. "Recovery" or "reestablishment" is better.
P324: "Positive (negative) values are westerly (easterly) wind components." Please delete the non-informative sentence that says nothing.
P335: "Return" is weird. Recovery or reestablishment.
P337: Move "also" after "is".
P353: Add a comma after "i.e."
P358: "looks about"? Do you mean "The stratosphere is …"?
P370: "…does not accompany by" should be "… is not accompanied by"
P396: Readers will be confused to see "western upper stratosphere".
P414: Count once again to see 40-day or 50-day.
P418: "is seen also" should be "is also seen"
P419: "If…then…" is an ill sentence.
P566: "consistent with" rather "consistent to"
P619: Change "combine" to "include"
P630: A typo is here. It should be "higher …than" rather than "higher … that".

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RR by Anonymous Referee #1 (11 Jun 2019)

Suggestions for revision or reasons for rejection

*REVIEW OF revised Wang et al.: Winter 2018 sudden stratospheric warming... (ACP 1361)*

GENERAL COMMENTS

The authors have taken my comments and suggestions carefully into account. Further, they added a wavenumber analysis which, however, does not support the aim of the paper. This is in the interpretation of local mesosphere microwave radiometer observations. So, either the wavenumber analysis of satellite observations is taken out or it is related to the MWR time series. A related major revision should include a careful re-edition.

SPECIFIC COMMENTS

There are two options which have to be decided upon: either concentration of the paper (1) or extension (2). In any case, a homogenization (3) is due.

1) Concentration: The authors added with sections 4.4 and 5.3 with figures 7, 8, and 9 a wave analysis of MLS temperatures. This analysis does not help the interpretation of the MWR observations, nor does it forward the knowledge on SSWs. Thats why one option is to erase these additions in order to concentrate the paper.

2) Extension: You are presenting wave spectra of MLS temperatures. If it is possible to show a reasonable link to the variability in the MWR carbon monoxide or winds, this would help interpretation of the latter. This could include the fusion of Fig. 8 and 9 for those levels which are shown in Fig. 7. Additionally, a frequency spectrum of MWR wind / carbon monoxide could be shown in another figure. This is the other option.

3) Homogenization: During editing the manuscript, some part of text has doubled and some other technicalities accoured - please, re-edit the text carefully.

TECHNICAL CORRECTIONS

L296: "descended up to" --> "descended down to"

L302: "explain causes" --> "suggest causes" because you did not quantitativel separate horizontal and vertical transports nor chamical reactions

L303: "relative to the pole of the polar vortex" --> "of the polar vortex relative to the pole"

L313: "easterly domination" --> "dominance of easterlies"

L362: "although" --> "while"

L362: In fig. 6a, it is rather the -50-degree-contour than the -55-degree-contour which is descending, or?

L395:
"does not accompany by" --> "is not associated with" or "is not accompanied by"
"coupling observed" --> "coupling as observed"

L422: "transformation" --> "propagation"

L428: End the sentence after "altitude" --> "... altitude. Fig. 8..."

L489: The sentence "The horizontal CO gradient at the polar vortex edge also exists and the vortex split and displacement of the pole associated with the SSW cause significant CO variability at the NH midlatitudes" is highly confusing. Perhaps, it could better express what you mean with "Because of the horizontal CO gradient at the polar vortex edge its split and displacement during the SSW cause a significant CO variability at the NH midlatitudes"?

L647-L659: This paragraph from "Among the..." to "...split event." is exactly the same as in L470-L481. Please, re-edit this doubling.

Fig. 8: The eastward wave 2 should be marked blue in the frequency-wavenumber plot (right column).

Fig. 9: In the spectra for 20 Dec - 10 Feb (left column) you associated eastward wave 2 with a blue line but do not show it in the spectrum. This wave type is alo not indicated in the frequency-wavenumber plots (right column).

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ED: Reconsider after major revisions (12 Jun 2019) by Farahnaz Khosrawi

AR by Gennadi Milinevsky on behalf of the Authors (14 Jul 2019) Author's response Manuscript

ED: Publish as is (15 Jul 2019) by Farahnaz Khosrawi

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Short summary

The major sudden stratospheric warming (SSW) dramatically changed atmospheric conditions. This event is accompanied by a sharp increase in the polar stratosphere temperature, zonal wind reverse, and strong changes in the polar mesosphere. These changes affect even the midlatitude mesosphere, which is not widely covered by observations. Our newly installed microwave radiometer allowed for studying mesospheric zonal wind and CO variations to understand the SSW 2018 effects at midlatitudes.