This a case study from the report, Too hot to handle, recently published by the Australian Security Leaders Climate Group.There is no greater disruptive physical climate risk than the collapse of the Atlantic meridional overturning circulation (AMOC), the main current system in the South and North Atlantic Oceans, which is linked to circulation in the Southern Ocean.
There is a non-trivial and unacceptable risk that the AMOC flow will collapse this century, with devastating consequences for global food production, for sea levels and for flooding in Australia. Shifts in global weather patterns would likely deprive Asia of vital monsoon rains, with enormous security consequences for the region and for Australia.
Yet in the Australian Government’s analysis of climate risks, no attention has been paid to the AMOC collapse. In fact, it does not get a mention in the Defence Strategic Review, or the first report of the current National Climate Risk Assessment (NCRA).
No minister or member of either major party has even mentioned it in parliament since the ALP came to power in 2022. Neither side of Australian politics has got a clue about it. One of the greatest climate-related threats to our future appears completely absent from the Australian Government’s thinking.