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The key conclusions of Working Group I [11] were: . An increasing body of observations gives a collective picture of a warming world and other changes in the climate system (The global average surface temperature has increased over the 20th century by about 0.6 °C; Temperatures have risen during the past four decades in the lowest 8 kilometres of the atmosphere; Snow cover and ice extent have ...
Short title: Climate.gov_Global-Warming_FAQ_15Aug13.docx; File change date and time: 11:26, 25 February 2014: Date and time of digitizing: 11:26, 25 February 2014
to confront the global climate emergency. ... Today's interim report from the UNFCCC [1] shows governments are nowhere close to the level of ambition needed to limit climate change to 1.5 degrees and meet the goals of the Paris Agreement. The major emitters must step up with much more ambitious emissions reductions targets for 2030 in their Nationally Deter
The first chapter describes the expected effects of climate change with one degree Celsius (1 °C) increase in average global temperature since pre-industrial times.. The second chapter describes the effects of two degrees average temperature and so forth until Chapter 6 which shows the expected effects of an increase of six Celsius degrees (6 °C) average global temperature.
31 August: an article in Geophysical Research Letters reported a March 2022 "unprecedented heatwave" in the Antarctic reaching 39 °C (70 °F) above average—the largest temperature anomaly ever recorded globally—attributed 2 °C of the increase to global warming, and projected possible heatwaves of an additional 5–6 °C (9.0–10.8 °F ...
To limit global warming to less than 1.5 °C global greenhouse gas emissions needs to be net-zero by 2050, or by 2070 with a 2 °C target. [271] This requires far-reaching, systemic changes on an unprecedented scale in energy, land, cities, transport, buildings, and industry.
1 February: a study published in PLOS Climate projected a decline in global thermal refugia for coral reefs from 84% (2022) to 0.2% (at 1.5 °C of global warming), and 0% (at 2.0 °C of global warming), stating that management efforts on thermal refugia may only be effective in the short term. [137]