[Aqualist] Patrick De Deckker seminar, Thurs 12th March

[John Tibby]

Dear colleagues,

I have great pleasure in inviting you to a talk by Emeritus Professor Patrick De Deckker from the ANU.

"Climatic evolution in the Australian region over the last 94 ka - spanning human occupancy - and unveiling the Local Last Glacial Maximum"

Thurs 12th March, 3:10 pm, Madigan Room, Mawson Building, University of Adelaide.  Map here<https://www.adelaide.edu.au/campuses/mapscurrent/north_terrace.pdf>

A biography and abstract are available below.

Patrick will also be giving a talk in the evening to the Royal Society of South Australia:
Spectacular Australian deep-sea canyons: their formation, associated biota, physico-chemical processes and past environmental changes
More details here<http://www.rssa.org.au/meetings.html>

Please feel free to distribute this notice to your networks.

With best wishes,
John.


Abstract
During the last 94 millennia, Australia and surrounding seas went through significant and critical climatic changes. I describe those events, based on the high-resolution record of marine sediment in 2 cores located offshore the southern Australian margin, which are compared with known events on land and other deep-sea cores.
Particular interest is placed on the period that spans the Last Glacial Maximum (LGM), the extent of which thus far had been poorly defined in the Australian region. Emphasis is placed on the period spanning the 34 to 14 ka period to demonstrate that the LGM was not always extremely dry and cold, that people were able to live in inland Australia as water existed in places, despite generally cold conditions. For the first time, I also estimate using a series of ten maps - at 2 ka intervals over the 34-14 ka period - the waxing and waning of oceanic fronts such as the Subtropical and Subantarctic Fronts, link sea-surface temperatures (SST) with periods of glacial extension in the Australian Alps and Tasmania, as well as the South Island of New Zealand, and the extent of the Leeuwin Current down to south of Australia, the latter current being a direct heat export from the Indo Pacific Warm Pool north of Australia.
The Last Glacial Maximum (LGM) is redefined for the Australian region which spans the ~24 to 18 ka period. The finition of the LGM is clearly set on 18.6 ka offshore southern Australia, and perhaps at 18 ka inland.

Short bio
Patrick completed a BA and MSc (Hons) at Macquarie several decades ago. He continued his tertiary education at the University of Adelaide from which he obtained a PhD in zoology and DSc in earth sciences. Patrick is a Fellow of the Australian Academy of Science and recipient of the Mawson Medal, the Australian Society for Limnology Medal and the Brady Medal awarded by the Micropalaeontological Society in 2019.
Patrick enjoys conducting multidisciplinary studies, many of which were on large Australian lake systems as well as the oceans bordering Australia. More recently, Patrick has worked on the fingerprinting of airborne dust from the Australian region for better understanding the impact on dust on environmental health.

__________________________________________
Associate Professor John Tibby
Department of Geography, Environment and Population

Director, Sprigg Geobiology Centre
University of Adelaide
Pronouns: he/his

Recent publications:
Tibby J., Adamson K. and Kershaw A.P. (2020) An 1800-year water-quality and vegetation record from Junction Park Billabong, Murray River, Australia: an assessment of European impacts and sensitivity to climate<https://link.springer.com/article/10.1007/s10933-019-00109-w#citeas>. Journal of Paleolimnology.

Tibby, J., Richards, J., Tyler, J.J., Barr, C., Fluin, J. and Goonan, P. (2020) Diatom-water quality thresholds in South Australian streams indicate a need for more stringent water quality guidelines<http://www.publish.csiro.au/MF/MF19065>. Marine and Freshwater Research.

Tibby J., Barr C., Marshall J.C., Richards J., Perna C., Fluin J. and Cadd H.R. (2019) Assessing the relative impacts of land-use change and river regulation on Burdekin River (Australia) floodplain wetlands.<https://onlinelibrary.wiley.com/doi/10.1002/aqc.3151> Aquatic Conservation: Marine and Freshwater Ecosystems 29(10), 1712-1725.

Tibby J., Tyler J.J. and Barr C. 2018. Post little ice age drying of eastern Australia conflates understanding of early settlement impacts<https://www.sciencedirect.com/science/article/abs/pii/S0277379118302051> Quaternary Science Reviews 202: 45-52.

Phone: +61 (0)8 8313-5146<tel:%2B61%20%280%298%208313-5146>
EMAIL: john.tibby at adelaide.edu.au<mailto:john.tibby at adelaide.edu.au>
SKYPE: johntibby

Web address: http://researchers.adelaide.edu.au/profile/john.tibby
Google Scholar profile: http://tinyurl.com/Google-Scholar-Tibby
Twitter: john_tibby
Field work photos (link)<https://www.flickr.com/photos/25765066@N06/>

Address for sending samples:
John Tibby
c/o Sarah Hoggard
Room G19
Napier Building
University of Adelaide
North Terrace
Adelaide, South Australia, 5005


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