Is there a persistent control of monsoon winds by precipitation during the late Holocene?

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Past variations in the south Asian summer monsoon (Southwest Monsoon, SWM) have been inferred earlier mainly using wind proxies in marine sediment cores from the upwelling-dominated western Arabian Sea. Here we report precipitation proxies, i.e., high-resolution stable oxygen isotope variations, of two different species of planktonic foraminifera, namely, Gs. sacculifer and Gs. ruber, in an AMS 14C dated sediment core from the monsoon-runoff-dominated eastern Arabian Sea. The above data sets reveal that during the past -1800 years (and perhaps up to -2800 years; resolution of the wind record is too low for comparison) reductions in monsoon wind strength in the western Arabian Sea appear to be persistently accompanied by aridity over India. It clarifies that past fluctuations in SWM precipitation over the Indian subcontinent followed the wind intensity records from the western Arabian Sea on centennial time scales. We further provide the first paleoclimatic evidence for the control exerted by SWM precipitation over the SWM wind strength via latent heat release.

Original languageEnglish (US)
Article numberQ03001
JournalGeochemistry, Geophysics, Geosystems
Volume7
Issue number3
DOIs
StatePublished - Mar 2006

Fingerprint

monsoons
Precipitation (meteorology)
monsoon
Arabian Sea
Holocene
Sediments
Oxygen Isotopes
sediment core
sediments
Latent heat
Runoff
Alpha Magnetic Spectrometer
oxygen isotopes
latent heat
upwelling water
accelerator mass spectrometry
planktonic foraminifera
aridity
drainage
India

Keywords

  • AMS
  • Foraminifera
  • Oxygen isotopes
  • Precipitation
  • Southwest monsoon
  • Wind proxies

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Is there a persistent control of monsoon winds by precipitation during the late Holocene? / Tiwari, Manish; Ramesh, R.; Yadava, M. G.; Somayajulu, B. L K; Jull, A.J. Timothy; Burr, G. S.

In: Geochemistry, Geophysics, Geosystems, Vol. 7, No. 3, Q03001, 03.2006.

Research output: Contribution to journalArticle

Tiwari, Manish ; Ramesh, R. ; Yadava, M. G. ; Somayajulu, B. L K ; Jull, A.J. Timothy ; Burr, G. S. / Is there a persistent control of monsoon winds by precipitation during the late Holocene?. In: Geochemistry, Geophysics, Geosystems. 2006 ; Vol. 7, No. 3.
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