4 ms·
Here is the AR5 report which is toning down it's previous predictions from in other words things weren't as bad as claimed. It's not as black and white and the
by ThomPete 9y ago
Here is the AR5 report which is toning down it's previous predictions from in other words things weren't as bad as claimed. It's not as black and white and the consequences are even more speculative.
"Future climate will depend on committed warming caused by past anthropogenic emissions, as well as future anthropogenic
emissions and natural climate variability. The global mean surface temperature change for the period 2016–2035 relative to
1986–2005 is similar for the four RCPs and will likely be in the range 0.3°C to 0.7°C (medium confidence). This assumes that
there will be no major volcanic eruptions or changes in some natural sources (e.g., CH4 and N2O), or unexpected changes in
total solar irradiance. By mid-21st century, the magnitude of the projected climate change is substantially affected by the
choice of emissions scenario. {2.2.1, Table 2.1}
Relative to 1850–1900, global surface temperature change for the end of the 21st century (2081–2100) is projected to likely
exceed 1.5°C for RCP4.5, RCP6.0 and RCP8.5 (high confidence). Warming is likely to exceed 2°C for RCP6.0 and RCP8.5
(high confidence), more likely than not to exceed 2°C for RCP4.5 (medium confidence), but unlikely to exceed 2°C for RCP2.6
(medium confidence). {2.2.1}
The increase of global mean surface temperature by the end of the 21st century (2081–2100) relative to 1986–2005 is likely
to be 0.3°C to 1.7°C under RCP2.6, 1.1°C to 2.6°C under RCP4.5, 1.4°C to 3.1°C under RCP6.0 and 2.6°C to 4.8°C under
RCP8.59
. The Arctic region will continue to warm more rapidly than the global mean (Figure SPM.6a, Figure SPM.7a). {2.2.1,
Figure 2.1, Figure 2.2, Table 2.1}
It is virtually certain that there will be more frequent hot and fewer cold temperature extremes over most land areas on daily
and seasonal timescales, as global mean surface temperature increases. It is very likely that heat waves will occur with a
higher frequency and longer duration. Occasional cold winter extremes will continue to occur. {2.2.1}"
https://www.ipcc.ch/pdf/assessment-report/ar5/syr/SYR_AR5_FINAL_full.pdf https://www.ipcc.ch/pdf/assessment-report/ar5/syr/SYR_AR5_FI...