4 ms·

Also exemplified in an XKCD comic: https://xkcd.com/2500/ https://xkcd.com/2500/

robertlagrant 3y ago
An interesting point missing from that XKCD is the 1990 IPCC report that says the following[0]: > Thus the observed increase could be largely due to this natural variability: alternatively this variability and other human factors could have offset a still larger human-induced greenhouse warming. The unequivocal detection of the enhanced greenhouse effect from observations is not likely for a decade or more. In 1990, the IPCC was saying it wasn't yet discernable that humans were particularly influencing the wider natural change of climate. [0] https://www.ipcc.ch/site/assets/uploads/2018/05/ipcc_90_92_assessments_far_overview.pdf https://www.ipcc.ch/site/assets/uploads/2018/05/ipcc_90_92_a... (section 1.0.5)
- mistrial9 3y ago
  only ten years ago, daily posts to a large California metropolitan area newspaper site in comments, claimed "no such thing" and "what about cooling" and "sun cycles" and whatever.. constantly..
- throw0101b 3y ago
  §1.0.1 Emissions resulting from human activities are substantially increasing the atmospheric concentrations of the greenhouse gases: carbon dioxide, methane, chloro fluorocarbons (CFCs) and nitrous oxide. These increases will enhance the greenhouse effect, resulting on average in an additional warming of the Earth's surface. The main greenhouse gas, water vapour, will increase in response to global warming and further enhance it. §1.0.3 A n average rate of increase of global mean temperature during the next century of about 0.3°C per decade (with an uncertainty range of 0.2—0.5°C per decade) assuming the IPCC Scenario A (Business-as- Usual) emissions of greenhouse gases; this is a more rapid increase than seen over the past 10,000 years. This will result in a likely increase in the global mean temperature of about 1°C above the present value by 2025 (about 2°C above that in the pre-industrial period), and 3°C above today's value before the end of the next century (about 4°C above pre-industrial).The rise will not be steady because of other factors. §3.0.2 The IPCC recommends a programme for the development and implementation of global, comprehensive and phased action for the resolution of the global warming problem under a flexible and progressive approach. * Ibid

An interesting point missing from that XKCD is the 1990 IPCC report that says the following[0]: > Thus the observed increase could be largely due to this natural variability: alternatively this variability and other human factors could have offset a still larger human-induced greenhouse warming. The unequivocal detection of the enhanced greenhouse effect from observations is not likely for a decade or more. In 1990, the IPCC was saying it wasn't yet discernable that humans were particularly influencing the wider natural change of climate. [0] https://www.ipcc.ch/site/assets/uploads/2018/05/ipcc_90_92_assessments_far_overview.pdf https://www.ipcc.ch/site/assets/uploads/2018/05/ipcc_90_92_a... (section 1.0.5)

mistrial9 3y ago
only ten years ago, daily posts to a large California metropolitan area newspaper site in comments, claimed "no such thing" and "what about cooling" and "sun cycles" and whatever.. constantly..
throw0101b 3y ago
§1.0.1 Emissions resulting from human activities are substantially increasing the atmospheric concentrations of the greenhouse gases: carbon dioxide, methane, chloro fluorocarbons (CFCs) and nitrous oxide. These increases will enhance the greenhouse effect, resulting on average in an additional warming of the Earth's surface. The main greenhouse gas, water vapour, will increase in response to global warming and further enhance it. §1.0.3 A n average rate of increase of global mean temperature during the next century of about 0.3°C per decade (with an uncertainty range of 0.2—0.5°C per decade) assuming the IPCC Scenario A (Business-as- Usual) emissions of greenhouse gases; this is a more rapid increase than seen over the past 10,000 years. This will result in a likely increase in the global mean temperature of about 1°C above the present value by 2025 (about 2°C above that in the pre-industrial period), and 3°C above today's value before the end of the next century (about 4°C above pre-industrial).The rise will not be steady because of other factors. §3.0.2 The IPCC recommends a programme for the development and implementation of global, comprehensive and phased action for the resolution of the global warming problem under a flexible and progressive approach. * Ibid