Sentences with phrase «ipcc average climate sensitivity»

Not exact matches

CONCLUSION The values for the global climate sensitivity published by the IPCC cover a range from 2.1 ̊C — 4.4 ̊C with an average value of 3.2 ̊C, which is seven times larger than that predicted here.

For present climate to show a Gavin / Hansen / IPCC sensitivity of 0.75 C / Wm ^ -2, an increase of 3.5-fold over the net average, one must infer that climate became increasingly sensitive to forcing as «G» has increased.

Using the IPCC climate sensitivity of 3.2 C, the CO2 level by 2100 would need to double by 2100, from today's 392 to 784 ppmv, to reach this warming (the high side IPCC «scenario and storyline» A2 is at this level, with estimated warming of 3.4 C above the 1980 - 1999 average, or ~ 3.2 C above today's temperature).

«all of the coupled climate models used in the IPCC AR4 reproduce the time series for the 20th century of globally averaged surface temperature anomalies; yet they have different feedbacks and sensitivities and produce markedly different simulations of the 21st century climate.»

On current trends, the IPCC finds, emissions will continue to soar and global average temperatures will rise between 2.5 and 7.8 degrees Celsius before the century is out, depending on the pace of economic growth and the sensitivity of the climate system to CO2.

That's right, the latest climate science (some 10 studies published in just the past 3 years) indicates that the earth's climate sensitivity — that is, how much the global average surface temperature will rise as a result of greenhouse gases emitted from human activities — is some 33 percent less than scientists thought at the time of the last IPCC Assessment, published in 2007.

Also, perhaps a more open - ended question would be what does he think the average sceptic MEANS when they say «I am sceptical about AGW, or CAGW, or the consensus position on climate sensitivity, or IPCC statements, or the possibility of mitigation...»

MAGICC gives the average of the GCM used by the IPCC, and assumes a 3 C equilibrium climate sensitivity (ECS).

Most of these sensitivities are a good 40 % below the average climate sensitivity of the models used by the U.N.'s Intergovernmental Panel on Climate Change climate sensitivity of the models used by the U.N.'s Intergovernmental Panel on Climate Change Climate Change (IPCC).

We have two new entries to the long (and growing) list of papers appearing the in recent scientific literature that argue that the earth's climate sensitivity — the ultimate rise in the earth's average surface temperature from a doubling of the atmospheric carbon dioxide content — is close to 2 °C, or near the low end of the range of possible values presented by the U.N.'s Intergovernmental Panel on Climate Change climate sensitivity — the ultimate rise in the earth's average surface temperature from a doubling of the atmospheric carbon dioxide content — is close to 2 °C, or near the low end of the range of possible values presented by the U.N.'s Intergovernmental Panel on Climate Change Climate Change (IPCC).

That science suggests the equilibrium climate sensitivity probably lies between 1.5 °C and 2.5 °C (with an average value of 2.0 °C), while the climate models used by the IPCC have climate sensitivities which range from 2.1 °C to 4.7 °C with an average value of 3.2 °C.

There are two prominent and undeniable examples of the models» insufficiencies: 1) climate models overwhelmingly expected much more warming to have taken place over the past several decades than actually occurred; and 2) the sensitivity of the earth's average temperature to increases in atmospheric greenhouse gas concentrations (such as carbon dioxide) averages some 60 percent greater in the IPCC's climate models than it does in reality (according to a large and growing collection of evidence published in the scientific literature).

Loehle estimated the equilibrium climate sensitivity from his transient calculation based on the average transient: equilibrium ratio projected by the collection of climate models used in the IPCC's most recent Assessment Report.

To make the IPCC projections of the evolution of the earth's average temperature better reflect the latest scientific estimates of the climate sensitivity, it is necessary to adjust them downward by about 30 % at the low end, about 50 % at the high end, and about 40 % in the middle.