RCP 2.6 assumes low greenhouse gas emissions; RCP 8.5
assumes high greenhouse gas emissions; RCP 4.5 assumes greenhouse gas emissions in between 2.6 and 8.5.
Warming fairly drastically increased the odds of each of these events in the models, with Tampa's current 10,000 - year storm becoming anywhere from a 2,500 - year to a 700 - year storm by the end of the century (
assuming high greenhouse gas emissions).
Not exact matches
They looked at each of those conditions through, first, a business - as - usual lens that
assumes a lack of international climate - policy action with continued
high rates of
greenhouse gas emissions and, second, an optimistic scenario of reduced emissions with climate change policy interventions.
Each model simulated a «control climate,» for the years 1981 to 2000, as well as a «warm climate,» for the years 2081 to 2100,
assuming relatively
high emissions of
greenhouse gases.
They compared historical weather records, an 1,800 - year - long simulation of the climate pre-Industrial-Revolution, and 40 simulations of climate change from 1920 to 2100 (
assuming high future
greenhouse gas emissions).
Scenario A was described as «on the
high side of reality», because it
assumed rapid exponential growth of
greenhouse gases and it
assumed that there would be no large volcanoes (which inject small particles into the stratosphere and cool the Earth) during the next half century.
This is what he [Hansen] said about scenario A later: «Scenario A was described as «on the
high side of reality», because it
assumed rapid exponential growth of
greenhouse gases»
This is what he said about scenario A later: «Scenario A was described as «on the
high side of reality», because it
assumed rapid exponential growth of
greenhouse gases»
There is the «business as usual» case that
assumes 4 degrees of global warming is inevitable, so we should use the cheapest and most plentiful energy sources available regardless of the fact that burning these fuels will raise atmospheric
greenhouse gas concentrations 40 percent
higher than current levels.
To make climate sensitivity small you've got to
assume some combination of forcings that is
high and temperature increase that is low (ie take the maximum for
greenhouse gases, negligible aerosol forcing, maximum solar forcing and the bottom of the temperature range).