Early deglacial (∼19-17 ka) strengthening of the northeast monsoon

Manish Tiwari, R. Ramesh, B. L K Somayajulu, A. J T Jull, G. S. Burr

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Earlier studies that mostly relied on bulk 14C dating indicated a weaker Southwest monsoon (SWM) and a stronger than present Northeast monsoon (NEM) during the Last Glacial Maximum (LGM, ∼18000 14C years or ∼21000 calendar years ago). We have analyzed a sediment core from the equatorial Indian Ocean, where planktonic foraminifera were dated by Accelerator Mass Spectrometry (AMS 14C). δ18O analysis of three species of foraminifera viz. Globigerinoides ruber, Globigerinoides sacculifer, and Globorotalia menardii reveals that the NEM strengthened during the early deglacial period (∼15000 14C years ago or ∼18000 calendar years ago) relative to the present and not during the LGM as surmised earlier.

Original languageEnglish (US)
Article numberL19712
Pages (from-to)1-4
Number of pages4
JournalGeophysical Research Letters
Volume32
Issue number19
DOIs
StatePublished - Oct 16 2005

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monsoons
calendars
monsoon
accelerator mass spectrometry
Alpha Magnetic Spectrometer
Indian Ocean
planktonic foraminifera
dating
Last Glacial Maximum
foraminifera
sediment core
sediments
accelerators
mass spectroscopy

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

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Early deglacial (∼19-17 ka) strengthening of the northeast monsoon. / Tiwari, Manish; Ramesh, R.; Somayajulu, B. L K; Jull, A. J T; Burr, G. S.

In: Geophysical Research Letters, Vol. 32, No. 19, L19712, 16.10.2005, p. 1-4.

Research output: Contribution to journalArticle

Tiwari, Manish ; Ramesh, R. ; Somayajulu, B. L K ; Jull, A. J T ; Burr, G. S. / Early deglacial (∼19-17 ka) strengthening of the northeast monsoon. In: Geophysical Research Letters. 2005 ; Vol. 32, No. 19. pp. 1-4.
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