Hydrological variations in central China over the past millennium and their links to the tropical Pacific and North Atlantic oceans

Duan, Fucai; Zhang, Zhenqiu; Wang, Yi; Chen, Jianshun; Liao, Zebo; Chen, Shitao; Shao, Qingfeng; Zhao, Kan

doi:https://doi.org/10.5194/cp-16-475-2020

Articles | Volume 16, issue 2

https://doi.org/10.5194/cp-16-475-2020

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

https://doi.org/10.5194/cp-16-475-2020

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

Articles | Volume 16, issue 2

Research article

|

10 Mar 2020

Research article |

| 10 Mar 2020

Hydrological variations in central China over the past millennium and their links to the tropical Pacific and North Atlantic oceans

Fucai Duan, Zhenqiu Zhang, Yi Wang, Jianshun Chen, Zebo Liao, Shitao Chen, Qingfeng Shao, and Kan Zhao

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Final revised paper (published on 10 Mar 2020)
Preprint (discussion started on 12 Aug 2019)

Interactive discussion

Status: closed

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

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RC1: 'Referee comment of cp-5', Anonymous Referee #1, 18 Aug 2019
- AC1: 'reply1', Fucai Duan, 04 Nov 2019
RC2: 'Comments on Duan et al.', Anonymous Referee #2, 08 Sep 2019
- AC2: 'reply2', Fucai Duan, 04 Nov 2019

Peer-review completion

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

ED: Reconsider after major revisions (07 Nov 2019) by Qiuzhen Yin

AR by Fucai Duan on behalf of the Authors (12 Nov 2019) Author's response Manuscript

ED: Referee Nomination & Report Request started (21 Nov 2019) by Qiuzhen Yin

RR by Anonymous Referee #1 (20 Dec 2019)

Suggestions for revision or reasons for rejection

Dear authors of the manuscript “Variations in the East Asian summer monsoon over the past millennium and their links to the Tropic Pacific and North Atlantic oceans”, I appreciate for a substantial effort in revising this manuscript. The current version is easier to understand than before, which makes me worry about the interpretation of the record and the main conclusion. Thus, I suggest that the manuscript should be accepted for publication after revision.
Main comments:
1. It should be a district heavy phase during the Medieval Climate Anomaly in the speleothem YX262 δ18O record, which includes a maximum peak around AD 1050. This indicates a strong Meiyu rain. How to obtain a weak Meiyu rain in Medieval Climate Anomaly (Page 1, lines 22-23)? The minimum peak around AD 1400 should be re-determined from an age control point.
2. A detailed explanation is necessary for the relationship between δ18O record and East Asian summer monsoon through the Meiyu rain, and the sentence (Page 5, lines 163-164) is unclear.
3. I am not a native English, but English needs to be carefully improved, e.g. 'and vice versa' is not often used in English.
Specific Comments:
1. An age control point is usually found on the bottom of the published speleothem records, which is also important to determine the age of the minimum peak of the YX262 record during the Medieval Climate Anomaly.
2. The link between the Meiyu rain and Northern Hemisphere temperature is unclear to me.
3. A north-south diploe mode of the speleothem δ18O records during the Medieval Climate Anomaly period is a new information to me, which is consistent with the results from the historical documents. I suggest that the authors double check the records, since others studies shows a monopole mode in the speleothem δ18O records [Tan, 2016].
4. It is suggested to check the description of results for current warm period. The reason is that the current warm period includes the instrumental period. e.g., the authors considered that the speleothem record in Yongxing cave can represent the intensity of East Asian summer monsoon, and it means that there is an extremely increase in the YX275 record during the early of 19th century, which need evidence from the early instrumental data or other high-resolution proxy data. To the best of my knowledge, there is no significant evidence of such a strong East Asian summer monsoon based on the instrumental records.
5. Page 2, lines 42-44. The reference is suggested to define these periods.
6. Page 4, line 128. There is no Fig. 3 before Fig. 4.
7. In Fig.3, a direct comparison of the raw data with 3.8 year temporal resolution is interesting to show.
8. A sententious physical process is suggested to explain the link between the Meiyu and the Indo-Pacific warm pool, the Meiyu and the Northern Atlantic Oscillation or Atlantic meridional overturning circulation.

Reference
Tan, M. (2016), Circulation background of climate patterns in the past millennium: Uncertainty analysis and re-reconstruction of ENSO-like state, Science China Earth Sciences, 59(6), 1225-1241.

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ED: Publish subject to minor revisions (review by editor) (09 Jan 2020) by Qiuzhen Yin

AR by Fucai Duan on behalf of the Authors (16 Jan 2020) Author's response

ED: Publish as is (05 Feb 2020) by Qiuzhen Yin

Short summary

We reconstruct a detailed history of the East Asian summer monsoon (EASM) using stalagmite records in central China during the last millennium. We estimate responses of the EASM to anthropogenic global warming by comparing its relative intensity between the Current Warm Period and Medieval Climate Anomaly, two recent warm periods. We also study potential links of the EASM to the tropical Pacific and North Atlantic oceans. This work advances our understanding of EASM dynamics.