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Indian monsoon variability on millennial-orbital timescales
Kathayat, G.; Cheng, H.; Sinha, A.; Spötl, C.; Edwards, R.L.; Zhang, H.; Li, X.; Yi, L.; Ning, Y.; Cai, Y.; Lui, W.L.; Breitenbach, S.F.M. (2016). Indian monsoon variability on millennial-orbital timescales. NPG Scientific Reports 6(24374): 7 pp.
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322, meer
Peer reviewed article  

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Auteurs  Top 
  • Kathayat, G.
  • Cheng, H.
  • Sinha, A.
  • Spötl, C.
  • Edwards, R.L.
  • Zhang, H.
  • Li, X.
  • Yi, L.
  • Ning, Y.
  • Cai, Y.
  • Lui, W.L.
  • Breitenbach, S.F.M.

    The Indian summer monsoon (ISM) monsoon is critical to billions of people living in the region. Yet, significant debates remain on primary ISM drivers on millennial-orbital timescales. Here, we use speleothem oxygen isotope (delta O-18) data from Bittoo cave, Northern India to reconstruct ISM variability over the past 280,000 years. We find strong coherence between North Indian and Chinese speleothem delta O-18 records from the East Asian monsoon domain, suggesting that both Asian monsoon subsystems exhibit a coupled response to changes in Northern Hemisphere summer insolation (NHSI) without significant temporal lags, supporting the view that the tropical-subtropical monsoon variability is driven directly by precession-induced changes in NHSI. Comparisons of the North Indian record with both Antarctic ice core and sea-surface temperature records from the southern Indian Ocean over the last glacial period do not suggest a dominant role of Southern Hemisphere climate processes in regulating the ISM variability on millennial-orbital timescales.

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