Abrupt weakening of the summer monsoon in northwest India ∼4100 yr ago

  title={Abrupt weakening of the summer monsoon in northwest India ∼4100 yr ago},
  author={Yama Dixit and David A. Hodell and Cameron A. Petrie},
Climate change has been suggested as a possible cause for the decline of urban centers of the Indus Civilization ~4000 yr ago, but extant paleoclimatic evidence has been derived from locations well outside the distribution of Indus settlements. Here we report an oxygen iso- tope record of gastropod aragonite (δ 18 O a ) from Holocene sediments of paleolake Kotla Dahar (Haryana, India), which is adjacent to Indus settlements and documents Indian summer mon- soon (ISM) variability for the past 6… 

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