11/22/2023 0 Comments 4th climate change report findingsDue to advances in attribution science, the report established strong links between human-caused climate change and increasingly frequent extreme weather events. The 2021 science report found that the earth is likely to hit 1.5☌ of warming within 20 years - with an extremely narrow pathway available to stay below that warming target. Working Group I: Physical Science Basis of Climate Change Meanwhile, the increasing rate of glacial, ice, and permafrost loss has threatened ecosystems as well as livelihoods, especially for the millions of people who live in the Arctic. While ocean warming has blunted the experience of climate change on land, it has caused marine acidification and deoxygenation, which in turn have destroyed coral reefs and degraded coastal ecosystems. This 2019 report highlighted two major findings: first, oceans have absorbed the majority of heat from global warming, and second, Earth’s coldest regions are warming the fastest. Special Report on the Ocean and Cryosphere in a Changing Climate While climate change affects land, the reverse is also true: Changes to land are driving climate change, responsible for 23% of human-caused emissions. For instance, temperatures on land have increased more than the global average, and this warming has led to more wildfires and heat waves, which in turn have influenced reduced agricultural yields. This 2019 report found that while climate change had been largely viewed as a future challenge, there were already impacts to people and ecosystems on land. Photo: European Union Special Report on Climate Change and Land This helped create momentum for the proliferation of commitments by state, subnational, and private actors to reach net-zero emissions by 2050 - as that is the only course that can put us on track to 1.5☌.Ī joint European fire operation works to contain forest fires in France in August 2022. The report’s findings about the myriad devastating impacts of breaching this warming threshold helped to fundamentally shift global ambition and made 1.5☌ the new global marker of adequate climate ambition. This table outlines the major reports from the IPCC's 6th assessment cycle Special Report on Global Warming of 1.5☌Īt the request of countries at the conclusion of the UN Climate Change Conference in Paris in 2015 (COP 21), the IPCC undertook this seminal project of examining the implications of 1.5☌ of warming above preindustrial levels and the consequences of exceeding it. A methodology report was also released by the IPCC’s Task Force on National Greenhouse Gas Inventories ( read more about IPCC’s process). The six major reports published during the sixth assessment cycle of the Intergovernmental Panel on Climate Change (IPCC), known as AR6, have permanently reshaped the global conversation on climate change, and the implications of these reports’ findings continue to reverberate around the world. WHAT WE HAVE LEARNED FROM THE IPCC’s LATEST REPORTS This blog post was originally published in April 2022, and has been updated with the Synthesis Report release. Drawing important conclusions from across all six reports released in this cycle, the Synthesis Report reflects our deepest understanding of climate science to date – and will become a key input for the Global Stocktake when experts and leaders will assess progress toward limiting global warming to 1.5☌. After years of effort by hundreds of scientists, experts, and governments around the world, the Intergovernmental Panel on Climate Change is wrapping up its sixth assessment cycle following the March 2023 release of its Synthesis Report.
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