Preprints
https://doi.org/10.5194/acp-2022-562
https://doi.org/10.5194/acp-2022-562
 
09 Sep 2022
09 Sep 2022

A change in the relation between the Subtropical Indian Ocean Dipole and the South Atlantic Ocean Dipole indices in the past four decades

Lejiang Yu1, Shiyuan Zhong2, Timo Vihma3, Cuijuan Sui4, and Bo Sun1 Lejiang Yu et al.
  • 1MNR Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, China
  • 2Department of Geography, Environment and Spatial Sciences, Michigan State University, East Lansing, MI, USA
  • 3Finnish Meteorological Institute, Helsinki, Finland
  • 4National Marine Environmental Forecasting Center, Beijing, China

Abstract. We utilized the global atmospheric reanalysis (ERA5) and reconstructed sea surface temperature (SST) data from 1979 through 2020 to examine the stability of the relationship between the SST oscillations in the southern Indian and the Atlantic Oceans described by the Subtropical Indian Ocean Dipole (SIOD) and the South Atlantic Ocean Dipole (SAOD) indices. We note a significant positive correlation between the two indices prior to the year 2000 but practically no correlation afterwards. We show that in the two decades prior to 2000, a positive phase of SAOD is associated with more convective activities over the subtropical southern Atlantic Ocean and eastern Brazil, which trigger a stronger upper-atmosphere wavetrain, and further produces stronger southern subtropical highs and surface anti-cyclonic circulations and therefore a stronger correlation between the two indices. The situation is reversed after 2000. Our results are potentially applicable for predictions of precipitation in southern Africa and South America.

Journal article(s) based on this preprint

Lejiang Yu et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-562', Anonymous Referee #1, 26 Sep 2022
    • AC1: 'Reply on RC1', Lejiang Yu, 18 Oct 2022
  • RC2: 'Comment on acp-2022-562', Anonymous Referee #2, 29 Sep 2022
    • AC2: 'Reply on RC2', Lejiang Yu, 18 Oct 2022
  • AC3: 'Comment on acp-2022-562', Lejiang Yu, 18 Oct 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Lejiang Yu on behalf of the Authors (24 Oct 2022)  Author's response    Author's tracked changes    Manuscript
ED: Reconsider after major revisions (26 Oct 2022) by Peter Haynes
AR by Lejiang Yu on behalf of the Authors (26 Oct 2022)  Author's response    Author's tracked changes
ED: Referee Nomination & Report Request started (12 Nov 2022) by Peter Haynes
RR by Anonymous Referee #1 (12 Nov 2022)
RR by Anonymous Referee #2 (26 Nov 2022)
ED: Publish subject to minor revisions (review by editor) (12 Dec 2022) by Peter Haynes
AR by Lejiang Yu on behalf of the Authors (13 Dec 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (14 Dec 2022) by Peter Haynes

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-562', Anonymous Referee #1, 26 Sep 2022
    • AC1: 'Reply on RC1', Lejiang Yu, 18 Oct 2022
  • RC2: 'Comment on acp-2022-562', Anonymous Referee #2, 29 Sep 2022
    • AC2: 'Reply on RC2', Lejiang Yu, 18 Oct 2022
  • AC3: 'Comment on acp-2022-562', Lejiang Yu, 18 Oct 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Lejiang Yu on behalf of the Authors (24 Oct 2022)  Author's response    Author's tracked changes    Manuscript
ED: Reconsider after major revisions (26 Oct 2022) by Peter Haynes
AR by Lejiang Yu on behalf of the Authors (26 Oct 2022)  Author's response    Author's tracked changes
ED: Referee Nomination & Report Request started (12 Nov 2022) by Peter Haynes
RR by Anonymous Referee #1 (12 Nov 2022)
RR by Anonymous Referee #2 (26 Nov 2022)
ED: Publish subject to minor revisions (review by editor) (12 Dec 2022) by Peter Haynes
AR by Lejiang Yu on behalf of the Authors (13 Dec 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (14 Dec 2022) by Peter Haynes

Journal article(s) based on this preprint

Lejiang Yu et al.

Lejiang Yu et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
Previous studies have noted a significant relationship between the Subtropical Indian Ocean Dipole and the South Atlantic Ocean Dipole indices, little is known about the stability of their relationship. We found that a significant positive correlation between the two indices prior to the year 2000 but insignificant correlation afterwards.
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