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Compare opinions of world leading experts and influencers.

Intergovernmental Panel on Climate Change

(IPCC) Scientific Body formed by U.N.

The IPCC is a scientific body formed by the United Nations in 1988 to summarize research on climate change for the purpose of informing policy makers. Their current assessment is that Global Warming over the last century is very likely to have been primarily caused by humans.
Contents

Intergovernmental Panel on Climate Change's Opinions

Mostly Agree
Most of the global average warming over the past 50 years is very likely due to anthropogenic GHG increases and it is likely that there is a discernible human-induced warming averaged over each continent (except Antarctica).
01 Jan 2008    Source


Mostly Disagree
The TAR [Third Assessment Report] states that the changes in solar irradiance are not the major cause of the temperature changes in the second half of the 20th century unless those changes can induce unknown large feedbacks in the climate system.
01 Jan 2008    Source


Neutral
The effects of galactic cosmic rays on the atmosphere (via cloud nucleation) and those due to shifts in the solar spectrum towards the ultraviolet (UV) range, at times of high solar activity, are largely unknown. The latter may produce changes in tropospheric circulation via changes in static stability resulting from the interaction of the increased UV radiation with stratospheric ozone.
01 Jan 2008    Source


Agree
Palaeoclimate model simulations are broadly consistent with the reconstructed Northern Hemisphere temperatures over the past 1000 years. The rise in surface temperatures since 1950 very likely cannot be reproduced without including anthropogenic greenhouse gases in the model forcings, and it is very unlikely that this warming was merely a recovery from a pre-20th century cold period.
01 Jan 2008    Source


Agree
There is considerable confidence that climate models provide credible quantitative estimates of future climate change, particularly at continental scales and above. This confidence comes from the foundation of the models in accepted physical principles and from their ability to reproduce observed features of current climate and past climate changes. ... models have consistently provided a robust and unambiguous picture of significant climate warming in response to increasing greenhouse gases.
01 Jan 2008    Source


Agree
The type, frequency and intensity of extreme events are expected to change as Earth’s climate changes, and these changes could occur even with relatively small mean climate changes. Changes in some types of extreme events have already been observed, for example, increases in the frequency and intensity of heat waves and heavy precipitation events.
01 Jan 2008    Source


Mostly Agree
Global sea level is projected to rise during the 21st century at a greater rate than during 1961 to 2003. Under the IPCC Special Report on Emission Scenarios (SRES) A1B scenario by the mid-2090s, for instance, global sea level reaches 0.22 to 0.44 m above 1990 levels, and is rising at about 4 mm yr–1.
01 Jan 2008    Source


Mostly Disagree
During the course of this century the resilience of many ecosystems (their ability to adapt naturally) is likely to be exceeded by an unprecedented combination of change in climate, associated disturbances (e.g., flooding, drought, wildfire, insects, ocean acidification) and in other global change drivers (especially land-use change, pollution and over-exploitation of resources), if greenhouse gas emissions and other changes continue at or above current rates (high confidence).
01 Jan 2008    Source


Disagree
Human activities cause significant changes in long-lived gases, ozone, water vapour, surface albedo, aerosols and contrails. ... Positive forcings lead to warming of climate and negative forcings lead to a cooling. ... [The net effect is positive].
25 Mar 2008    Source


Disagree
It is virtually certain that global temperatures during coming centuries will not be significantly influenced by a natural orbitally induced cooling. It is very unlikely that the Earth would naturally enter another ice age for at least 30 kyr.
01 Jan 2008    Source


Disagree
It is very likely that glacial-interglacial CO2 variations have strongly amplified climate variations, but it is unlikely that CO2 variations have triggered the end of glacial periods. Antarctic temperature started to rise several centuries before atmospheric CO2 during past glacial terminations.
01 Jan 2008    Source


Mostly Agree
It is very unlikely that the 20th-century warming can be explained by natural causes. The late 20th century has been unusually warm [which] is consistent with the scientific understanding of how the climate should respond to a rapid increase in greenhouse gases like that which has occurred over the past century, and the warming is inconsistent with the scientific understanding of how the climate should respond to natural external factors such as variability in solar output and volcanic activity.
03 Apr 2008    Source


Comparisons with Other Experts and Influencers

The similarity between Intergovernmental Panel on Climate Change and each expert and influencer is calculated by looking at how the same questions were answered. These figures are used to calculate conforming, nonconforming, and projected opinions. The accuracy of the analysis depends on Intergovernmental Panel on Climate Change's coverage, which grows with the number of their opinions entered into TakeOnIt.

Agree
Gavin Schmidt
Climatologist
83% agreement / 3 opinions

Andrew Dessler
Climatology Professor
100% agreement / 2 opinions

RealClimate
Climatology Blog
100% agreement / 2 opinions

Barack Obama
United States President
87% agreement / 2 opinions

Mostly Agree
James Hansen
Climatology Professor
75% agreement / 2 opinions

Wikipedia
World's Largest Encyclopedia
62% agreement / 2 opinions

Hillary Clinton
US Secretary of State 2009-, Democrat
75% agreement / 1 opinions

Al Gore
Environmentalist, Former U.S. Vice President
75% agreement / 1 opinions

Joseph Romm
Physicist, Environmentalist, Writer
75% agreement / 1 opinions

In-Between
Jasper Kirkby
Particle Physicist
58% agreement / 3 opinions

Mitt Romney
Former Governor of Massachusetts
50% agreement / 2 opinions

S. Fred Singer
Head of NIPCC, Astrophysics Professor
50% agreement / 2 opinions

Khabibullo Abdusamatov
Astronomer
50% agreement / 2 opinions

Nathan Paldor
Meteorology Professor
50% agreement / 1 opinions

Mostly Disagree
Roy Spencer
Meteorologist
25% agreement / 4 opinions

B.P. Radhakrishna
Geologist, President of the Geological Society of India
25% agreement / 2 opinions

Global Warming Petition Project
Petition
25% agreement / 2 opinions

Monte Hieb
Mining Engineer
25% agreement / 2 opinions

David Bellamy
Botanist, Documentarian
25% agreement / 1 opinions

Qing-Bin Lu
Physics Professor
25% agreement / 1 opinions

Disagree
Denis Rancourt
Physics Professor
15% agreement / 5 opinions

Conservapedia
Christian Encyclopedia
12% agreement / 2 opinions

Tom Segalstad
Geology Professor
12% agreement / 2 opinions

David Evans
Mathematician
12% agreement / 2 opinions

Robert Carter
Marine Geophysical Professor
12% agreement / 2 opinions

Patrick Frank
Chemist
0% agreement / 1 opinions

Conforming Opinions

Intergovernmental Panel on Climate Change's conforming opinions are opinions that align with the group of experts and influencers Intergovernmental Panel on Climate Change typically agrees with.

Coverage Answer Question
Medium Disagree Do negative feedback loops mostly cushion the effect of atmospheric CO2 increases?
Medium Agree Will IPCC climate models make accurate predictions?
Low Mostly Agree Are the causes of climate change well understood?
Low Agree Does atmospheric CO2 cause significant global warming?

Nonconforming Opinions

Intergovernmental Panel on Climate Change's nonconforming opinions are opinions that contradict the group of experts and influencers Intergovernmental Panel on Climate Change typically agrees with.

Coverage Group Answer Expert Answer Question
High Agree Mostly Agree Is global warming caused primarily by humans?
Low Disagree Neutral Does cosmic radiation significantly affect earth's climate?

Projected Opinions

Intergovernmental Panel on Climate Change's projected opinions are opinions Intergovernmental Panel on Climate Change is expected to have if their opinions align with the experts and influencers that they typically agree with.

Coverage Answer Question
Medium Neutral Does Cap and Trade beat carbon tax for reducing emissions?
Medium Mostly Disagree Is Yucca mountain the best place to store nuclear waste?
Medium Mostly Agree Is the IPCC objective?
Medium Neutral Should the United States invade Iraq?
Medium Agree Is free trade generally beneficial for a country?
Medium Agree Should the world embrace nuclear energy?
Low Disagree Is trying to "change the world" foolish?
Low Mostly Agree Should abortion be legal?
Low Mostly Agree Is the death penalty acceptable?
Low Agree Should the US close Guantanamo Bay?
Low Mostly Agree Should the United States have Universal health care?
Low Agree Did complex life evolve through the process of natural selection?
Low Agree Is nuclear energy safe enough to justify its use?
Low Agree Are biofuels good?
Low Agree Is the Anthropogenic Global Warming hypothesis falsifiable?
Low Disagree Are we prepared for a pandemic?
Low Agree Is development aid to Africa effective?