More than 250 scientists from Australia and overseas have called for deep cuts to greenhouse gas emissions in an open letter drawing together peer-reviewed literature on the "strong" and "unequivocal" links between worsening bushfires and human-induced climate change.

Australian National University Professor Nerilie Abram, one of eight lead signatories and a co-author of the letter, said the letter was "in many ways ... the product of despair as scientists witnessed the deadly fire season unfold".

Horses fleeing as a bushfire burning south of Canberra threatens communities in Bumbalong and the region on Saturday. Credit:Alex Ellinghausen

Among the other 260 signatories were Professor Katrin Meissner, director of UNSW's Climate Change Research Centre, and University of NSW Canberra fire researcher Professor Jason Sharples.

"How much worse does this have to get before the science stops being ignored?" Professor Meissner said. "It’s the lack of visionary policies to protect our country and people for the future that has brought us to the point where we felt we had to raise our voice and demand action on the science."