Abstract
The East Asian summer monsoon (EASM) precipitation from May to August over the Helan Mountains, located in the northwest margin of the EASM, has been investigated through tree-ring δ 18O for the last 120 years. The dry and wet intervals derived from the δ 18O series can be verified by the tree-ring width-based May–July precipitation reconstruction. Most of the time, the δ 18O series and ring width-derived precipitation reconstruction vary synchronously at low frequency. High values of δ 18O correspond to high precipitation periods, and vice versa. Since the 1970s, the East Asian summer monsoon precipitation has been increasing, which was confirmed by other records and documents. Our results show that tree-ring δ 18O can serve as an indicator of the strength of the East Asian summer monsoon variation in the past. We also found that tree-ring δ 18O varies inversely to δ 13C in the study area.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
