AUTHOREA
Log in
Sign Up
Browse Preprints
LOG IN
SIGN UP
Essential Site Maintenance
: Authorea-powered sites will be updated circa 15:00-17:00 Eastern on Tuesday 5 November.
There should be no interruption to normal services, but please contact us at
[email protected]
in case you face any issues.
Yanjun Cai
Public Documents
1
Interdecadal to centennial climate variability surrounding the 8.2 ka event in Beijin...
Pengzhen Duan
and 10 more
September 11, 2022
The 8.2 ka event has been extensively studied, whereas its structure is ambiguous in North China. Here we present a high-resolution (~1 year) δ18O record of annual laminated speleothem from Beijing to characterize the detailed variability across this event in North China. Our record indicates a dry 8.2 ka event spanning 8.254‒8.107 ka BP with a two-stage structure superimposed by three prominent positive excursions. The identical structure of speleothem δ18O records between North and central China during the event suggests a common forcing/response in East China, whereas the progressively increased offset between their average values may reflect changes in moisture source or rainout effect. A close comparison with the Greenland ice core records suggest a strong linear response of the Asian summer monsoon to the North Atlantic climate changes across the early and middle stages of the event, but a different mechanism in the termination process.