THE EVOLUTION OF THE EL NINO-SOUTHERN OSCILLATION IN SOUTHEAST AUSTRALIA
Grant number: IN140100050 | Funding period: 2014 - 2016
El Niño events starve southeast Australia of rainfall, resulting in droughts and wildfires. El Niño activity is projected to amplify as global temperatures rise, heralding a serious threat to Australia's water security and the incidence and magnitude of wildfires. The key to understanding the potential effects of future changes in El Niño activity lies in the past. El Niño activity has varied substantially over the last 12,000 years. This project will reconstruct the response of southeast Australian climate, vegetation and fire activity to changes in El Niño activity over this period using lake sediments located in El Niño sensitive locations in Tasmania.
Related publications (29)
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<jats:p>Abstract. Paleoclimate proxy reconstruction initiatives, such as the Australian component of the international paleoclimat..
Northward shift of the southern westerlies during the Antarctic Cold Reversal
Michael-Shawn Fletcher, Joel Pedro, Tegan Hall, Michela Mariani, Joseph A Alexander, Kristen Beck, Maarten Blaauw, Dominic A Hodgson, Henk Heijnis, Patricia S Gadd, Agathe Lise-Pronovost
Inter-hemispheric asynchrony of climate change through the last deglaciation has been theoretically linked to latitudinal shifts i..
Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating
Agathe Lise-Pronovost, Michael-Shawn Fletcher, Quentin Simon, Zenobia Jacobs, Patricia S Gadd, David Hestop, Andy IR Herries, Yusuke Yokoyama, Aster Team
Lake sediment archives covering several glacial cycles are scarce in the Southern Hemisphere and they are challenging to date. Her..
Colonialism and the environment: The pollution legacy of the Southern Hemisphere's largest copper mine in the 20th century
Larissa Schneider, Niamh Shulmeister, Michela Mariani, Kristen K Beck, Michael-Shawn Fletcher, Atun Zawadzki, Krystyna M Saunders, Marco A Aquino-Lopez, Simon G Haberle
Mining has been a major contributor to economic development in Australia since British arrival in the late 1700s, with little to n..
The impacts of intensive mining on terrestrial and aquatic ecosystems: A case of sediment pollution and calcium decline in cool temperate Tasmania, Australia
KK Beck, M Mariani, M-S Fletcher, L Schneider, MA Aquino-Lopez, PS Gadd, H Heijnis, KM Saunders, A Zawadzki
Mining causes extensive damage to aquatic ecosystems via acidification, heavy metal pollution, sediment loading, and Ca decline. Y..
The role of species composition in the emergence of alternate vegetation states in a temperate rainforest system
Michael-Shawn Fletcher, Haidee R Cadd, Michela Mariani, Tegan L Hall, Samuel W Wood
Context Forest systems are dynamic and can alternate between alternative stable states in response to climate, disturbance and int..
The long-term impacts of climate and fire on catchment processes and aquatic ecosystem response in Tasmania, Australia
Kristen K Beck, Michael-Shawn Fletcher, Patricia S Gadd, Henk Heijnis, Krystyna M Saunders, Atun Zawadzki
The impacts of fire and climate on freshwater ecosystems are not well understood, masking the potential impacts of anthropogenic c..
The influence of fine-scale topography on the impacts of Holocene fire in a Tasmanian montane landscape
Haidee Cadd, Michael-Shawn Fletcher, Michela Mariani, Hendrik Heijnis, Patricia S Gadd
Tasmania's montane temperate rainforests contain some of Australia's most ancient and endemic flora. Recent landscape-scale fires ..
Climate change reduces resilience to fire in subalpine rainforests
Michela Mariani, Michael-Shawn Fletcher, Simon Haberle, Hahjung Chin, Atun Zawadzki, Geraldine Jacobsen
Climate change is affecting the distribution of species and the functioning of ecosystems. For species that are slow growing and p..
How significant is atmospheric metal contamination from mining activity adjacent to the Tasmanian Wilderness World Heritage Area? A spatial analysis of metal concentrations using air trajectories models
Larissa Schneider, Michela Mariani, Krystyna M Saunders, William A Maher, Jennifer J Harrison, Michael-Shawn Fletcher, Atun Zawadzki, Henk Heijnis, Simon G Haberle
This study investigated metal contamination from historical mining in lakes in the Tasmanian Wilderness World Heritage Area (TWWHA..
Evidence for reduced environmental variability in response to increasing human population growth during the late Holocene in northwest Tasmania, Australia
Anthony Romano, Michael-Shawn Fletcher
A fundamental tenet of human land management is to create spatial and temporal predictability in an environment to improve subsist..
Biogeochemical Responses to Holocene Catchment-Lake Dynamics in the Tasmanian World Heritage Area, Australia
Michela Mariani, Kristen K Beck, Michael-Shawn Fletcher, Peter Gell, Krystyna M Saunders, Patricia Gadd, Robert Chisari
Environmental changes such as climate, land use, and fire activity affect terrestrial and aquatic ecosystems at multiple scales of..
The indirect response of an aquatic ecosystem to long-term climate-driven terrestrial vegetation in a subalpine temperate lake
K Beck, M-S Fletcher, G Kattel, LA Barry, PS Gadd, H Heijnis, KS Jacobsen
Aim To assess whether climate directly influences aquatic ecosystem dynamics in the temperate landscape of Tasmania or whether the..
The changing role of fire in conifer-dominated temperate rainforest through the last 14,000 years
M-S Fletcher, DMJS Bowman, C Whitlock, M Mariani, L Stahle
Climate, fire and vegetation dynamics are often tightly coupled through time. Here, we use a 14 kyr sedimentary charcoal and polle..
Variance and Rate-of-Change as Early Warning Signals for a Critical Transition in an Aquatic Ecosystem State: A Test Case From Tasmania, Australia
Kristen K Beck, Michael-Shawn Fletcher, Patricia S Gadd, Henk Heijnis, Krystyna M Saunders, Gavin L Simpson, Atun Zawadzki
Critical transitions in ecosystem states are often sudden and unpredictable. Consequently, there is a concerted effort to identify..
Coupling of the Intertropical Convergence Zone and Southern Hemisphere mid-latitude climate during the early to mid-Holocene
Michela Mariani, Michael-Shawn Fletcher, Russell N Drysdale, Krystyna M Saunders, Henk Heijnis, Geraldine Jacobsen, Atun Zawadzki
Conceptual models predict a tight coupling between the Intertropical Convergence Zone (ITCZ) and the Southern Westerly Winds (SWW)..
Re-assessment of the mid to late Quaternary glacial and environmental history of the Boco Plain, western Tasmania
Paul Augustinus, David Fink, Michael-Shawn Fletcher, Ian Thomas
The glacial geomorphology and drill core-based stratigraphy of the Boco Plain, western Tasmania, reveal a complex sequence of Quat..
An early onset of ENSO influence in the extra-tropics of the southwest Pacific inferred from a 14, 600 year high resolution multi-proxy record from Paddy's Lake, northwest Tasmania
Kristen K Beck, Michael-Shawn Fletcher, Patricia S Gadd, Henk Heijnis, Geraldine E Jacobsen
Tropical El Niño Southern Oscillation (ENSO) is an important influence on natural systems and cultural change across the Pacific O..
Testing quantitative pollen dispersal models in animal-pollinated vegetation mosaics: An example from temperate Tasmania, Australia
M Mariani, SE Connor, M Theuerkauf, P Kunes, M-S Fletcher
Reconstructing past vegetation abundance and land-cover changes through time has important implications in land management and cli..
The Southern Annular Mode determines interannual and centennial-scale fire activity in temperate southwest Tasmania, Australia
Michela Mariani, Michael-Shawn Fletcher
Southern Annular Mode (SAM) is the primary mode of atmospheric variability in the Southern Hemisphere. While it is well establishe..
Can we infer vegetation change from peat carbon and nitrogen content? A palaeoecological test from Tasmania, Australia
Michael-Shawn Fletcher, Haidee R Cadd, Simon G Haberle
We set out to test the ability to detect vegetation change from organic soil nutrient (carbon and nitrogen) composition in the fir..
Southern Westerly Winds submit to the ENSO regime: A multiproxy paleohydrology record from Lake Dobson, Tasmania
Andrew BH Rees, Les C Cwynar, Michael-Shawn Fletcher
The El Niño-Southern Oscillation (ENSO) and Southern Westerly Winds (SWW) profoundly influence synoptic-scale climate in the South..
Changes in biomass burning mark the onset of an ENSO-influenced climate regime at 42 degrees S in southwest Tasmania, Australia
Michael-Shawn Fletcher, Alexa Benson, Hendrik Heijnis, Patricia S Gadd, Les C Cwynar, Andrew BH Rees
We use macroscopic charcoal and sediment geochemistry analysis of two proximal upper montane lakes located at 42°S in southwest Ta..