The abrupt onset of the modern South Asian Monsoon winds

Christian Betzler, Gregor P Eberli, Dick Kroon, James D. Wright, Peter K Swart, Bejugam Nagender Nath, Carlos A. Alvarez-Zarikian, Montserrat Alonso-Garciá, Or M. Bialik, Clara L. Blättler, Junhua Adam Guo, Sébastien Haffen, Senay Horozal, Mayuri Inoue, Luigi Jovane, Luca Lanci, Juan Carlos Laya, Anna Ling Hui Mee, Thomas Lüdmann, Masatoshi NakakuniKaoru Niino, Loren M. Petruny, Santi D. Pratiwi, John J G Reijmer, Jesús Reolid, Angela L. Slagle, Craig R. Sloss, Xiang Su, Zhengquan Yao, Jeremy R. Young

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The South Asian Monson (SAM) is one of the most intense climatic elements yet its initiation and variations are not well established. Dating the deposits of SAM wind-driven currents in IODP cores from the Maldives yields an age of 12. 9 Ma indicating an abrupt SAM onset, over a short period of 300 kyrs. This coincided with the Indian Ocean Oxygen Minimum Zone expansion as revealed by geochemical tracers and the onset of upwelling reflected by the sediment's content of particulate organic matter. A weaker proto-monsoon' existed between 12.9 and 25 Ma, as mirrored by the sedimentary signature of dust influx. Abrupt SAM initiation favors a strong influence of climate in addition to the tectonic control, and we propose that the post Miocene Climate Optimum cooling, together with increased continentalization and establishment of the bipolar ocean circulation, i.e. the beginning of the modern world, shifted the monsoon over a threshold towards the modern system.

Original languageEnglish (US)
Article number29838
JournalScientific Reports
Volume6
DOIs
StatePublished - Jul 20 2016

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monsoon
wind-driven current
climate
particulate organic matter
upwelling
tracer
Miocene
dust
cooling
oxygen
tectonics
sediment
Indian Ocean
ocean circulation
dating

ASJC Scopus subject areas

  • General

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Betzler, C., Eberli, G. P., Kroon, D., Wright, J. D., Swart, P. K., Nath, B. N., ... Young, J. R. (2016). The abrupt onset of the modern South Asian Monsoon winds. Scientific Reports, 6, [29838]. https://doi.org/10.1038/srep29838

The abrupt onset of the modern South Asian Monsoon winds. / Betzler, Christian; Eberli, Gregor P; Kroon, Dick; Wright, James D.; Swart, Peter K; Nath, Bejugam Nagender; Alvarez-Zarikian, Carlos A.; Alonso-Garciá, Montserrat; Bialik, Or M.; Blättler, Clara L.; Guo, Junhua Adam; Haffen, Sébastien; Horozal, Senay; Inoue, Mayuri; Jovane, Luigi; Lanci, Luca; Laya, Juan Carlos; Mee, Anna Ling Hui; Lüdmann, Thomas; Nakakuni, Masatoshi; Niino, Kaoru; Petruny, Loren M.; Pratiwi, Santi D.; Reijmer, John J G; Reolid, Jesús; Slagle, Angela L.; Sloss, Craig R.; Su, Xiang; Yao, Zhengquan; Young, Jeremy R.

In: Scientific Reports, Vol. 6, 29838, 20.07.2016.

Research output: Contribution to journalArticle

Betzler, C, Eberli, GP, Kroon, D, Wright, JD, Swart, PK, Nath, BN, Alvarez-Zarikian, CA, Alonso-Garciá, M, Bialik, OM, Blättler, CL, Guo, JA, Haffen, S, Horozal, S, Inoue, M, Jovane, L, Lanci, L, Laya, JC, Mee, ALH, Lüdmann, T, Nakakuni, M, Niino, K, Petruny, LM, Pratiwi, SD, Reijmer, JJG, Reolid, J, Slagle, AL, Sloss, CR, Su, X, Yao, Z & Young, JR 2016, 'The abrupt onset of the modern South Asian Monsoon winds', Scientific Reports, vol. 6, 29838. https://doi.org/10.1038/srep29838
Betzler, Christian ; Eberli, Gregor P ; Kroon, Dick ; Wright, James D. ; Swart, Peter K ; Nath, Bejugam Nagender ; Alvarez-Zarikian, Carlos A. ; Alonso-Garciá, Montserrat ; Bialik, Or M. ; Blättler, Clara L. ; Guo, Junhua Adam ; Haffen, Sébastien ; Horozal, Senay ; Inoue, Mayuri ; Jovane, Luigi ; Lanci, Luca ; Laya, Juan Carlos ; Mee, Anna Ling Hui ; Lüdmann, Thomas ; Nakakuni, Masatoshi ; Niino, Kaoru ; Petruny, Loren M. ; Pratiwi, Santi D. ; Reijmer, John J G ; Reolid, Jesús ; Slagle, Angela L. ; Sloss, Craig R. ; Su, Xiang ; Yao, Zhengquan ; Young, Jeremy R. / The abrupt onset of the modern South Asian Monsoon winds. In: Scientific Reports. 2016 ; Vol. 6.
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