From the UNIVERSITY OF QUEENSLAND and the “climate change is not just a recent phenomenon” department.
Shelf sediments reveal climate shifts through the eons
Climate change around Antarctica can severely affect Australia’s rainfall and even influence the distribution of wet and dry zones across southeast Asia, an international study has revealed.
Chelsea Korpanty of The University of Queensland’s School of Biological Sciences worked on the study, which was led by Dr Jeroen Groeneveld from the Center of Marine and Environment Sciences at the University of Bremen, Germany.
Ms Korpanty said global climate underwent significant change about 14 million years ago when the Antarctic ice sheet expanded.
“The new study presents shallow-marine sediment records from the Australian continental shelf, providing the first empirical evidence linking high-altitude cooling around Antarctica to climate change in the subtropics during the Miocene era,” she said.
“Our data is consistent with the inference that expansion of sea ice around Antarctica resulted in a northward movement of the westerly winds.
“In turn, this may have pushed tropical atmospheric circulation, shifting the main rainfall belt over large parts of Southeast Asia.”
The study used sediment cores drilled along the west coast of Australia during International…