9 September 2022, Science Journal: Exceeding 1.5°C global warming could trigger multiple climate tipping points. Climate tipping points are conditions beyond which changes in a part of the climate system become self-perpetuating. These changes may lead to abrupt, irreversible, and dangerous impacts with serious implications for humanity. Armstrong McKay et al. present an updated assessment of the most important climate tipping elements and their potential tipping points, including their temperature thresholds, time scales, and impacts. Their analysis indicates that even global warming of 1°C, a threshold that we already have passed, puts us at risk by triggering some tipping points. This finding provides a compelling reason to limit additional warming as much as possible… Our assessment provides strong scientific evidence for urgent action to mitigate climate change. We show that even the Paris Agreement goal of limiting warming to well below 2°C and preferably 1.5°C is not safe as 1.5°C and above risks crossing multiple tipping points. Crossing these CTPs can generate positive feedbacks that increase the likelihood of crossing other CTPs. Currently the world is heading toward ~2 to 3°C of global warming; at best, if all net-zero pledges and nationally determined contributions are implemented it could reach just below 2°C. This would lower tipping point risks somewhat but would still be dangerous as it could trigger multiple climate tipping points. Read more here.
Category Archives: The Science
25 January 2021, Renew Economy, One year after “Black Summer” bushfire crisis, media misinformation still burns. During Australia’s Black Summer bushfire crisis, misinformation raged alongside the flames. Large media outlets pushed the line that the sheer intensity of the crisis could be explained by a sudden surge in arson attacks, using an inflated number that simply kept growing in size. This falsehood was presented as a counter to the widespread assumption that climate change had played a major role in making that bushfire season so wildly catastrophic and unusual. That misinformation was eventually firmly debunked. About 0.09% of the fires in New South Wales were found to be deliberately lit, and all of these were minor spot fires, found the NSW Royal Commission report, and the federal equivalent firmly pins climate change as a major cause. Much of the initial misinformation was driven by 7 News Australia, first with a post claiming the following: Read more here
17 September 2020, RealClimate, New studies confirm weakening of the Gulf Stream circulation (AMOC). Many of the earlier predictions of climate research have now become reality. The world is getting warmer, sea levels are rising faster and faster, and more frequent heat … Continue reading →
9 September 2020, The conversation, Research reveals shocking detail on how Australia’s environmental scientists are being silenced. Ecologists and conservation experts in government, industry and universities are routinely constrained in communicating scientific evidence on threatened species, mining, logging and other threats … Continue reading →