Seminars
ACEAS has established a monthly seminar series. The seminars will be held on the 2nd Wednesday of every month at 1pm
(times and dates may vary depending on presenter location/availability).
The ACEAS Seminar Series organising committee is Maxim Nikurashin (UTAS), Rebecca McGirr (ANU) and Taimoor Sohail (UNSW).
If you are interested in presenting, or would like to nominate a speaker, please email us:
Upcoming Seminars
Seminar – Yuhao Dai
Southern Ocean’s role in regulating atmospheric pCO2 during the geological past
Speaker: Dr Yuhao Dai, Australian National University
Date: Wednesday 12 April 2023
Time: 1:00 pm
Location: Via Zoom Streamed to ANU Jaeger 1 Seminar room, IMAS Hobart board room
Abstract
The Southern Ocean has been thought to regulate CO2 air-sea exchange and contribute to CO2 partial pressure (pCO2) variabilities in the past via biological and physical processes. Here, I show that by combining reconstructions of different aspects of Southern Ocean biogeochemistry during the last deglaciation (~18,000 to 11,000 years ago), effects of biological and physical processes in the Southern Ocean on atmospheric pCO2 can be separately evaluated. In the subantarctic Southern Ocean, reconstructions of sea surface temperature, pH, and nutrient utilisation efficiency show that changes in both biological and physical processes were important contributors to CO2 outgassing during the last deglaciation. In the polar Southern Ocean, reconstructions of deep-water concentrations of carbonate ion, phosphate, oxygen, and radiocarbon demonstrate that physically driven CO2 outgassing in the polar Southern Ocean was comparatively minor but occurred before biological process contributed to CO2 outgassing during the last deglaciation onset.
To expand on my previous research, I will use a similar multi-proxy method to investigate the Southern Ocean carbon cycle changes during the Mid Miocene (17-13 million years ago), when the atmospheric pCO2 was comparable to the present and the projected 21st century level. Combining reconstructions during the Miocene and the last deglaciation will provide insight into how the Southern Ocean responded to a wide spectrum of past climate conditions. By doing so, I hope to uncover how the Southern Ocean carbon cycle has evolved and help to understanding how it may respond to future changes.
Seminar – Meredith Nash
Speaker: Prof. Meredith Nash, University of Tasmania/Australian National University
Date: Wednesday 10 May 2023
Time: 1:00 pm
Location: Via Zoom and livestreamed to ANU D.A. Brown Rm, J8, IMAS Flex rooms
Abstract TBC
Seminar – William Scott
Modelling ice-ocean interactions using Firedrake
Speaker: William Scott, Australian National University
Date: Wednesday 14 June 2023
Time: 1:00 pm
Location: Presented live from ANU, Jaeger Seminar room 1 Livestreamed to IMAS Board Room 203 and Via Zoom
Abstract TBC
Seminar – Felicity McCormack
Speaker: Dr Felicity McCormack, Monash University
Date: Wednesday 9 August 2023
Time: 1:00 pm
Location: Via Zoom and livestreamed to ANU D.A. Brown Rm, J8
Abstract TBC
Seminar – Klaus Meiners
Speaker: Dr Klaus Meiners, Australian Antarctic Division
Date: Wednesday 13 September 2023
Time: 1:00 pm
Location: Via Zoom and livestreamed to ANU D.A. Brown Rm, J8
Abstract TBC
