Reply to Weiss: Tree-ring stable oxygen isotopes suggest an increase in Asian monsoon rainfall at 4.2 ka BP.

Abstract

Weiss (1) raises interesting points on our article (2). Heobserves that the Delingha tree-ringδ18O record matchesKM-A speleothemδ18O record from the Mawmluh Cave in India, that defines the 4.2-ka event’s global-type stratum(3). This event is also manifested as a multicentennialdrought in the Iranian Gol-E-Zard speleothem record (4).Weiss further argues that the Delingha record is alsoconsistent with the 4.2-ka anomaly recorded in low-resolution proxy records from northern China despiteinherent limitations of these proxies