Summer monsoons provide the majority of annual precipitation in much of the global tropics. In northern Australia, the hydroclimate is dominated by the Indo-Australian Summer Monsoon (IASM). This monsoon provides 70-90% of yearly rainfall, all within the austral summer, supporting agriculture and regional ecosystems. Historical records of the IASM began in the late nineteenth century and reveal limited monsoon variability. In order to better understand how the IASM may respond to anthropogenic warming of the oceans and atmosphere, previous studies utilized oxygen isotopic ratios of stalagmites from the Kimberley region of easternmost tropical Western Australia. As a complement to that work, I analyzed the carbon isotopic ratios of the same stalagmites. The addition of carbon isotopic data provides a more complete picture of hydroclimate variability.
Stephanie Lucker, ’15
Sponsor: Rhawn Denniston