Skip to main page content

Hydroclimate and ENSO Variability Recorded by Oxygen Isotopes From Tree Rings in the South American Altiplano

Theme:
Symposium 4
What:
Poster
Part of:
When:
12:30, Wednesday 29 Jun 2022 (1 hour 30 minutes)
Where:
Coeur des Sciences, Sherbrooke Building, UQAM - Salle polyvalente (SH-4800)   Virtual session
This session is in the past.

Click below to enter the virtual room.

Enter virtual room

Are you a speaker or staff?

Access for speakers and staff
How:

Hydroclimate variability in tropical South America is strongly regulated by the South American Summer Monsoon (SASM). However, past precipitation changes are poorly constrained due to limited observations and high-resolution paleoproxies. We found that summer precipitation and the El Niño-Southern Oscillation tarapacana (ENSO) in the Chilean variability and Bolivian are well registered Altiplano in in tree-ring the Central stable Andes oxygen (18–22°S, isotopes ∼4,500 (δ18OTR) m a.s.l.) of Polylepis with the northern forests having the strongest climate signal. More enriched δ18OTR values were found at the southern sites likely due to the increasing aridity toward the southwest of the Altiplano. The climate signal of P. tarapacana δ18OTR is the combined result of moisture transported from the Amazon Basin, modulated by the SASM, ENSO, and local evaporation, and emerges as a novel tree-ring climate proxy for the southern tropical Andes.

Speaker
University of California Davis

Documents

Session detail
Allows attendees to send short textual feedback to the organizer for a session. This is only sent to the organizer and not the speakers.
To respect data privacy rules, this option only displays profiles of attendees who have chosen to share their profile information publicly.

Changes here will affect all session detail pages