Model-based orbital-scale precipitation δ¹⁸O variations and distinct mechanisms in Asian monsoon and arid regions.

ABSTRACT: The past Asian precipitation δ¹⁸O (δ¹⁸O_p) records from stalagmites and other deposits have shown significant orbital-scale variations, but their climatic implications and regional differences are still not fully understood. This study, as the first attempt of a 300-kyr transient stable isotope-enabled simulation, investigated the characteristics and mechanisms of the orbital-scale δ¹⁸O_p variations in three representative regions of Asia: arid Central Asia (CA), monsoonal South Asia (SA) and monsoonal East Asia (EA). The modelling results showed that the variations in the CA, SA and EA annual δ¹⁸O_p exhibited significant but asynchronous 23-kyr precession cycles. Further analyses revealed that although the precessio

SUBMITTER: Liu X 

PROVIDER: S-EPMC9647003 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature