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A tale of shifting relations: East Asian summer and winter monsoon variability during the Holocene
Kaboth-Bahr, S.; Bahr, A.; Zeeden, C.; Yamoah, K.A.; Lone, M.J.; Chuang, C.-K.; Löwemark, L.; Wei, K.-Y. (2021). A tale of shifting relations: East Asian summer and winter monsoon variability during the Holocene. NPG Scientific Reports 11(1): 6938. https://dx.doi.org/10.1038/s41598-021-85444-7
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
Peer reviewed article  
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  • Kaboth-Bahr, S.
  • Bahr, A.
  • Zeeden, C.
  • Yamoah, K.A.
  • Lone, M.J.
  • Chuang, C.-K.
  • Löwemark, L.
  • Wei, K.-Y.
Abstract
    Understanding the dynamics between the East Asian summer (EASM) and winter monsoon (EAWM) is needed to predict their variability under future global warming scenarios. Here, we investigate the relationship between EASM and EAWM as well as the mechanisms driving their variability during the last 10,000 years by stacking marine and terrestrial (non-speleothem) proxy records from the East Asian realm. This provides a regional and proxy independent signal for both monsoonal systems. The respective signal was subsequently analysed using a linear regression model. We find that the phase relationship between EASM and EAWM is not time-constant and significantly depends on orbital configuration changes. In addition, changes in the Atlantic Meridional Overturning circulation, Arctic sea-ice coverage, El Niño-Southern Oscillation and Sun Spot numbers contributed to millennial scale changes in the EASM and EAWM during the Holocene. We also argue that the bulk signal of monsoonal activity captured by the stacked non-speleothem proxy records supports the previously argued bias of speleothem climatic archives to moisture source changes and/or seasonality.
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