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RCP 2.6 is a "very stringent" pathway. [6] According to the IPCC, RCP 2.6 requires that carbon dioxide (CO 2) emissions start declining by 2020 and go to zero by 2100.It also requires that methane emissions (CH 4) go to approximately half the CH 4 levels of 2020, and that sulphur dioxide (SO2) emissions decline to approximately 10% of those of 1980–1990.
Shared Socioeconomic Pathways (SSPs) are climate change scenarios of projected socioeconomic global changes up to 2100 as defined in the IPCC Sixth Assessment Report on climate change in 2021. [2] They are used to derive greenhouse gas emissions scenarios with different climate policies.
Average IPCC AR5 climate model projections for 2081–2100 relative to 1986–2005, under low and high emission scenarios. The Fifth Assessment Report (AR5) of the United Nations Intergovernmental Panel on Climate Change (IPCC) is the fifth in a series of such reports and was completed in 2014. [1]
The third report NPCC3 was published in 2015, and provides climate projections until 2100. [4] [12] Another report, NPCC 2019, was published in March 2019 and provides an updated analysis of the projections made with data collected in 2015, as well as an exposition of particular at-risk communities in New York City. [5]
As much of the Northern Hemisphere continues to bake in a year of unprecedented heat waves linked to climate ... to 20:1 by 2050 and to 50:1 by 2100. ... NCAA Tournament projection for March Mad
Some projections include data from areas which are larger than the national boundaries, e.g. to more fully evaluate catchment areas of transboundary rivers. Various countries have produced their national climate projections with feedback and/or interaction with stakeholders. [45]
Climate projections are based on emission scenarios. The emission scenarios used by the IPCC and by mainstream climate scientists are largely derived from the predicted demand for fossil fuels, and in our view take insufficient consideration of the constrained emissions that are likely due to the depletion of these fuels. [40]
Climate projections to 2100 [ edit ] On 5 January 2024, the Center for Climate Research Singapore released projections that Singapore's annual mean temperatures will rise by between 0.6 °C and 5°C by the end of the 21st century.