3 ms·

Conservative estimates put it at 2.8 degrees by 2100. Do you believe the temperature will stop rising in 2100? By what mechanism will it stop rising?

ThomPete 9y ago
Conservative put it at 1.4 http://www.ipcc.ch/ipccreports/tar/wg2/index.php?idp=29 http://www.ipcc.ch/ipccreports/tar/wg2/index.php?idp=29
- SwellJoe 9y ago
  OK, will it stop at 1.4? If so, how?
  - deleted 9y ago
    [deleted]
- lozenge 9y ago
  That's including the "radical action taken now" scenario (RCP), which anybody can see is not happening. It is also from AR3, the latest report is AR5, published over a decade later.
  - 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...

ThomPete 9y ago

Conservative put it at 1.4 http://www.ipcc.ch/ipccreports/tar/wg2/index.php?idp=29 http://www.ipcc.ch/ipccreports/tar/wg2/index.php?idp=29

SwellJoe 9y ago
OK, will it stop at 1.4? If so, how?
- deleted 9y ago
  [deleted]
lozenge 9y ago
That's including the "radical action taken now" scenario (RCP), which anybody can see is not happening. It is also from AR3, the latest report is AR5, published over a decade later.
- 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...