/ Modified jul 3, 2019 10:30 a.m.

Episode 189: Tree ring research tracks the history of the Asian monsoon

Tree ring science helps University of Arizona researchers look at Asian rainfall trends over four centuries in the past.

AZSCI 189 Tree Ring Asian Monsoon Chinese tree ring researcher Huiming Song collects a core sample from a tree in central China.
Yu Liu, The Institute of Earth Environment, Chinese Academy of Sciences

The Research Corporation for Science Advancement
Arizona Science

Tree ring research tracks the history of the Asian monsoon

This episode is supported by the The Research Corporation for Science Advancement.
NPR
Episode 189: University of Arizona tree ring researcher Steven Leavitt

Nearly half the world's population is affected by the Asian summer monsoon, but the monsoon has been weakening since the 1940s. Instrumental and observational records go back about 100 years, but University of Arizona tree ring researcher Steven Leavitt has tracked the monsoon's history 450 years into the past to uncover previous trends in rainfall and drought. His study found that the 80-year decline in rainfall is unprecedented, and traced it to the impact of man-made atmospheric pollutants.

Steven Leavitt spoke with Tim Swindle of the University of Arizona Lunar and Planetary Laboratory.

Arizona Science
Catch Arizona Science each Friday during Science Friday on NPR 89.1. You can subscribe to our podcast on Apple Music, Spotify, Amazon Music, or the NPR App. See more from Arizona Science.
By posting comments, you agree to our
AZPM encourages comments, but comments that contain profanity, unrelated information, threats, libel, defamatory statements, obscenities, pornography or that violate the law are not allowed. Comments that promote commercial products or services are not allowed. Comments in violation of this policy will be removed. Continued posting of comments that violate this policy will result in the commenter being banned from the site.

By submitting your comments, you hereby give AZPM the right to post your comments and potentially use them in any other form of media operated by this institution.
AZPM is a service of the University of Arizona and our broadcast stations are licensed to the Arizona Board of Regents who hold the trademarks for Arizona Public Media and AZPM. We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples.
The University of Arizona