I am interested in how Earth’s climates have changed in the past, because understanding past changes can give us clues as to what Earth’s climate may look like in the future. I am particularly interested in the water cycle.
I am currently a postdoctoral research associate in the Department of Earth and Planetary Sciences, Washington University in St. Louis. I use the stable isotope geochemistry of many different natural materials to infer past changes in water isotopes, and in turn relate these to changes in hydroclimate. For this I use the recently-published PAGES Iso2k database of water isotope proxy records. The database contains water isotope proxy records from archives including glaciers, lake sediments, corals, ground ice, trees, and marine sediments, allowing investigation of past marine and terrestrial hydroclimate.
I also investigate the controls on spatial and temporal variability in the stable isotopic composition of precipitation, using the GNIP database as well as other sources of water isotope data. This is providing a more detailed understanding of key drivers of variability in the global water cycle.
Prior to starting my postdoc, I worked as a geologist in the petroleum industry, and as a marine scientist for the Australian government.
Aside from climate science, my interests are many and varied: some edited highlights include swimming, cross country and downhill skiing, camping, reading fantasy novels, taking bad photos with old film cameras, using the Oxford comma, and playing the violin.
I am investigating changes in the strength in the Pacific Walker Circulation
during the past 1000 years, using a recently compiled
of water isotope proxy records. I also use existing measurements of the stable isotopic composition of
precipitation to investigate drivers of spatial and temporal variability
in the global water cycle.
PhD (awarded April 2019)
The University of Adelaide, Australia
Advisors: Dr Jonathan Tyler, Dr John Tibby
Thesis title: Reconstructing Australia’s late Quaternary climates
from the geochemistry of lake sediments and snail shells.
Awarded Dean’s Commendation for Doctoral Thesis Excellence
BSc with 1st Class Honours in Geology (graduated March 2012)
The University of Adelaide, Australia
Honours thesis advisor: Dr Alan Collins
Honours thesis title: Geochronological and sedimentological
constraints on the evolution of the lower Cuddapah Basin, India.
Treasurer of the Australasian Quaternary Association (2016-2019)
Konecky, B., N. McKay, O. Churakova (Sidorova), L. Comas-Bru, E. Dassié, K. DeLong, G. Falster, et al. 2020. “The Iso2k Database: A Global Compilation of Paleo-δ18O and δ2H Records to Aid Understanding of Common Era Climate.” Earth System Science Data, February. Link to publication.
Falster, G., S. Delean, J. Tyler. 2018. “Hydrogen Peroxide Treatment of Natural Lake Sediment Prior to Carbon and Oxygen Stable Isotope Analysis of Calcium Carbonate.” Geochemistry, Geophysics, Geosystems 19 (9): 3583–95. Link to publication.
Falster, G., J. Tyler, K. Grant, J. Tibby, C. Turney, S. Löhr, G. Jacobsen, A. P. Kershaw. 2018. “Millennial-Scale Variability in South-East Australian Hydroclimate between 30,000 and 10,000 Years Ago.” Quaternary Science Reviews 192 (July): 106–22. Link to publication.
Collins, Alan., S. Patranabis-Deb, E. Alexander, C. Bertram, G. Falster, R. Gore, J. Mackintosh, et al. 2015. “Detrital Mineral Age, Radiogenic Isotopic Stratigraphy and Tectonic Significance of the Cuddapah Basin, India.” Gondwana Research 28 (4): 1294–1309. Link to publication.
Selected Conference Proceedings
Falster, G., B. Konecky, M. Madhavan, S. Stevenson, S. Coats. 2020. “Fingerprinting the Pacific Walker Circulation Using Precipitation δ18O”. AGU Fall Meeting (invited speaker)
Falster, G., B. Konecky,N. McKay, A. Atwood, J. Conroy, M. Fischer, M. Jones, L. Jonkers, S. Stevenson. D. Thompson, J. Tyler. 2019. “New insights into spatial and temporal dynamics of the global water cycle from the Iso2k database”. AGU Fall Meeting (oral)
Falster, G.., G. Simpson, H. Ye. 2019. “Testing the link between southern Australian aridity and variability in the global carbon cycle”. 13th International Conference on Paleoceanography (poster).
Falster G., J. Tyler, T. Kluge, F. Dux, R. Drysdale, A. Chivas, J. Tibby, L. Reed. 2018. “Leaving a trail: reconstructing past climates from stable and clumped isotope analysis of snail shells.”" Australasian Quaternary Association biennial meeting (oral)
In the works
Falster, G., B. Konecky, M. Madhavan, S. Coats, S. Stevenson. 2021. “Imprint of the Pacific Walker circulation in global precipitation δ18O”. Submitted to Journal of Climate.