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Its full title is "Global Warming of 1.5 °C, an IPCC special report on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty". [1]
One of the hotter periods was the Last Interglacial, around 125,000 years ago, where temperatures were between 0.5 °C and 1.5 °C warmer than before the start of global warming. [40] This period saw sea levels 5 to 10 metres higher than today. The most recent glacial maximum 20,000 years ago was some 5–7 °C colder. This period has sea ...
[73] [74] For example, the UNFCCC invited the IPCC to prepare a report on global warming of 1.5 °C. The IPCC subsequently released the Special Report on Global Warming of 1.5 °C (SR15) in 2018. [75] The report showed that it was possible to keep warming below 1.5 °C during the 21st century. But this would mean deep cuts in emissions.
The U.K.'s plan was rated compatible for 1.5 degrees of warming. Britain's plan aims to cut emissions by at least 81% by 2035 when compared to 1990 emissions, ...
The respondents have generally expressed high confidence in the IPCC reports, with 63.5% agreeing that they estimated the impacts of temperature change exactly right (4 on the scale), and only 1.4% responding that they had strongly underestimated and 2.5% that they had strongly overestimated those impacts (1 and 7 on a scale.)
To stay below 1.5 °C of global warming, emissions need to be cut by roughly 50% by 2030. This figure takes into account each country's documented pledges. [9] After the Paris Agreement was signed, global emissions continued to rise rather than fall. [7] 2024 was the hottest year on record, with a global average temperature above 1.5 °C. [7]
The Paleocene–Eocene Thermal Maximum (PETM) was a time period with more than 5–8 °C global average temperature rise across the event. [121] This climate event occurred at the time boundary of the Paleocene and Eocene geological epochs. [122] During the event large amounts of methane was released, a potent greenhouse gas. [123]
The IPCC Special Report on Global Warming of 1.5 °C (2018) included detailed analysis of the probable differences in impact of "limiting global warming to 1.5 °C compared with 2 °C", warning that a 2 °C temperature increase would worsen impacts that include extreme weather, Arctic sea ice decline, rising sea levels, coral bleaching, and ...