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As someone who's not up to date on all the climate research. Are most the scientists in agreement that climate change is a result of our actions? And do they al
by bobajeff 7y ago
As someone who's not up to date on all the climate research. Are most the scientists in agreement that climate change is a result of our actions? And do they all agree on how dangerous changes to our climate are?
- pjc50 7y agoThe IPCC summary is available to read: https://www.ipcc.ch/site/assets/uploads/2018/02/ar4-wg1-spm-1.pdf https://www.ipcc.ch/site/assets/uploads/2018/02/ar4-wg1-spm-... > very high confidence that the global average net effect of human activities since 1750 has been one of warming, with a radiative forcing of +1.6 [+0.6 to +2.4] W m–2 > Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations. > The equilibrium climate sensitivity is a measure of the climate system response to sustained radiative forcing. It is not a projection but is defi ned as the global average surface warming following a doubling of carbon dioxide concentrations. It is likely to be in the range 2°C to 4.5°C with a best estimate of about 3°C, and is very unlikely to be less than 1.5°C.
- radford-neal 7y agoThat's from AR4, not the most recent AR5 report. In AR5, the IPCC is back to a range of 1.5C to 4.5C for climate sensitivity (very unlikely to be below 1C or above 6C), which is pretty much what the uncertainty in estimating climate sensitivity has been for the last 50 years. A rather remarkable lack of progress...