Natural and forced behaviour of the Pacific Walker Circulation over the past 800 years

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• Georgina Falster, Australian National University
• Wednesday 24 April 2024, 17:30-19:00
• Small Lecture Theatre, Department of Geography, Downing Site.

If you have a question about this talk, please contact Jinheum Park.

Building doors are card operated, so latecomers may not be able to access the venue.

The Pacific Walker Circulation (PWC) is an important part of the global climate system, and affects weather and climate all over the world. However, our observational records of the climate system are too short to characterise the PWC ’s long-term internal variability, as well as how the PWC responds to external forcings such as volcanic eruptions and anthropogenic forcings.

In this seminar I will share a reconstruction of the PWC ’s behaviour over the past 800 years. I will outline how I calculated this reconstruction using a network of globally-distributed water isotope proxy records, as well as how I quantified uncertainties from different sources. I will share some new insights this reconstruction has allowed, including a close examination of the PWC ’s response to both volcanic and anthropogenic forcing.

This talk is part of the Quaternary Discussion Group (QDG) series.

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