Climate change is a significant and lasting change in the statistical distribution of weather patterns. In public discourse, often used as a shorthand for the effects of anthropogenic global warming.

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Is animal agriculture responsible for more greenhouse gas emissions than transportation?

Animal agriculture is responsible for 18 percent of greenhouse gas emissions, more than all transportation combined. By http://www.cowspiracy.com/facts/ from Fao.org. Spotlight: Livestock impacts ...
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1answer
139 views

Are Easterbrook's oxygen-isotope paleo-temperature reconstructions credible?

In this video of a presentation given at a climate-skeptic Heartland Institute conference, Don Easterbrook presents his view of recent climate history. He compares his own projections of future ...
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2answers
360 views

Do RSS satellite samples show no warming since September 1996?

On the Climate Depot is a claim that Global Temperature Standstill Lengthens: No global warming for 17 years 10 months – Since Sept. 1996 (214 months) and this graph of RSS satellite data is ...
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1answer
244 views

Did global warming cause temperatures to drop because of polar vortex episodes?

On the Environmental Defense Fund website, this claim is made: This past winter’s polar vortex episode was caused by a persistent high pressure system that developed over western Canada, which ...
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1answer
117 views

Do higher CO₂ concentrations increase plant well-being?

Dr. Craig Idso claims increased levels of CO2 reduce the negative effects of a number of plant stresses including: high salinity, low light, high and low temperatures, insufficient water, air ...
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1answer
223 views

Did both higher temperatures and an ice age exist at CO₂ levels ten times the present?

The Climate Depot quotes Dr. Patrick Moore: When modern life evolved over 500 million years ago, CO₂ was more than 10 times higher than today, yet life flourished at this time. Then an Ice Age ...
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57 views

Has the climate not warmed in 17 years? [duplicate]

Some of the rhetoric around AGW denial/skepticism is that the Earth hasn't warmed in 10/16/17 years. For example: ...
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2answers
320 views

Is there more global sea ice than 35 years ago?

On Mail Online, it is claimed: In fact, across the globe, there are about one million square kilometres more sea ice than 35 years ago, which is when satellite measurements began. Is that true? ...
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2answers
328 views

Was July 1936 the hottest month on record for mainland USA?

In July 2012, the US National Oceanic and Atmospheric Administration (NOAA) reported. The average temperature for the contiguous U.S. during July was 77.6°F, 3.3°F above the 20th century average, ...
2
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1answer
328 views

Does temperature drive CO₂?

The blog THE HOCKEY SCHTICK claims that "temperature drives CO2 levels, not man-made CO2". The paper "Atmospheric verification of anthropogenic CO2 emission trends" is cited as proof. The claim is ...
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1answer
270 views

Does Beck's chemical analysis of CO₂ discredit the Law Dome ice core findings?

On RealC02 summarizing Ernst-Georg Beck's work, this history of CO₂ levels are posted for the 19th century: SkepticalScience, on its "How reliable are CO₂ measurements?" page says "CO₂ levels are ...
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231 views

Did fertilising the ocean with 100 tons of iron sulphate increase the salmon catch by over 100,000 tons?

In July 2012 American businessman Russ George, dumped 100 tonnes of iron in the ocean off British Columbia to encourage plankton growth and thus increase salmon stocks (link). It is now claimed that ...
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1answer
2k views

Does unadjusted NASA climate data show no long-term global warming?

The Real Science blog by "Steven Goddard" claims that NASA have altered their data in the USA and other countries to show global warming. Right after the year 2000, NASA and NOAA dramatically ...
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2answers
3k views

Is Matt Ridley's assertion that the most extreme of the IPCC climate projections is based on very implausible assumptions correct?

Matt Ridley, the science writer who is often grouped with skeptics of warming and denialists despite asserting: man-made climate change is real but not likely to do much harm, let alone prove to ...
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2answers
344 views

Were Alpine glaciers much smaller in Roman times?

In a critique (or possibly a rant) against modern climate science, Swiss geologist Christian Schlüchter makes a very specific claim that Alpine glaciers were essentially non-existent (or very much ...
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0answers
48 views

volcanic CO₂ emission estimates increasing [closed]

I just read that estimates of CO₂ emissions form volcanos has increased from 100Mt to 600Mt/ year in the last decade or so. While still only a fraction of the natural cycle, in what ways does this ...
3
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2answers
148 views

Does Carbon Dioxide mix well in the atmosphere?

At Skeptical Science, they explain: Mauna Loa is often used as an example of rising carbon dioxide levels because its the longest, continuous series of directly measured atmospheric CO₂. The ...
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0answers
63 views

Has anthropogenic climate change been disproven? [duplicate]

Some scientists attribute non-terrestrial causes for climate change. Are they correct? For example, this scientist attributes current weather extremes to solar activity, moon orbit cycles and ...
5
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1answer
170 views

Are the latest estimates of the cost of climate policy five time higher than the projected benefits?

Bjorn Lomborg argues that the implication of the latest IPCC report is that current mitigation policies are not smart in that the cost of mitigating CO2 emissions is much higher than the benefits: ...
4
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1answer
248 views

Is ocean acidification happening?

This YouTube video snippet, Dr Don Easterbrook claims there is not enough CO2 available to affect the oceans enough to make them go lower than a pH of 7, and hence there is no acidification. Is this ...
4
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1answer
191 views

Will a warming climate cause more crime?

The Register reports, somewhat skeptically, that an american consultant has produced an analysis claiming that climate change will lead to an increase in crime. The paper, published in the Journal ...
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2answers
694 views

Have global surface temperatures not shown significant warming since the late 1990s?

Those skeptical about the science of global warming have frequently alleged that the surface temperature record has "paused" since about 1998 and showed no significant warming trend (see this recent ...
14
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1answer
485 views

Is a billion dollar lobbying campaign primarily responsible for opposition to climate policy?

A recent article in arstechnica reports that there is a large flow of funding from some conservative groups to a network of climate denying think tanks and lobbyists. The article Reports how work by ...
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3answers
300 views

Has climate change measurably increased the likelihood of tropical storms such as Haiyan?

The recent extreme tropical storm Haiyan has brought the relationship between cyclones and climate change back into the newspaper headlines. This recent headline from Britain's Daily Mirror suggests ...
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3answers
919 views

Does the phase-out of incandescent light bulbs measurably reduce overall electrical power consumption?

Many countries are phasing out incandescent light bulbs. For example, in the European Union, various types of classic light bulbs have been removed from the market in the last years. The claim is ...
13
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1answer
576 views

Is climate change currently good for the world economy?

Bjorn Lomborg has just edited a new book How Much have Global Problems Cost the World? (Kindle version here) in which he assembles economic analysis of the world's major challenges. The point of the ...
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549 views

Did the IPCC obfuscate the evidence in a way that obscures the discrepancy between previous climate models and recent observations?

Just before the recent IPPC meeting which was due to publish new analysis on climate change, the Financial Times published an excellent summary of the difference between predictions made in the last ...
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3answers
6k views

Did the Arctic Ice Sheet grow by 60% from 2012 to 2013?

I came across this picture on Facebook. The image claims to have been taken from a NASA satellite. I am skeptical this is correct, and if it is, does it show the ice sheet has increased in size ...
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2answers
798 views

Does this graph show climate-change predictions don't meet observations?

Dr. Roy Spencer, a climate change contrarian, posted this graph on his blog claiming that observed temperature trends are much lower than what climate models predict: Is Spencer misrepresenting ...
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3answers
851 views

Is the cost of preventing climate change 50 times higher than the cost of adapting to it?

Political activist Topher has created the "50-to-1" project. In the explanatory video, he claims that: It's 50 times more expensive to try to stop climate change than it is to adapt to climate ...
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2answers
327 views

Did UK Met Office claim in 2012 that global warming stopped 16 years ago?

Not the most respectable source, nevertheless mainstream newspaper Daily Mail claimed that: Global warming stopped 16 years ago, reveals Met Office report quietly released... and here is the ...
5
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1answer
570 views

Have there been 28 years of “above average temperatures”?

350.org has posted following image on FB 341 months is a long time. If you're 28 or younger, you haven't experienced a full month of average global temperatures ever in your lifetime. ...
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1answer
371 views

Can some simple, old models of the effect of CO₂ predict temperature better than complex modern climate simulations?

A recent post on the climate skeptic blog climateaudit.org showed some comparisons of the relationship between world temperature and CO2 over the 20th century from a simple model originally published ...
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138 views

Does 51% of CNBC climate coverage deny that climate change is caused by man-made pollution?

Here is the source of the claim: Mediamatter for America climate statistics graph Tweeted, and re-tweeted by Al Gore The source that the image refers to: REPORT: CNBC's Climate Denial Is Bad For ...
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310 views

Are rising temperatures making fires worse?

Al Gore tweeted: Ferocious wildfire in California forces evacuation of ~3,000 [...] Rising temperatures are making fires worse. (Emphasis mine) Is this true?
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1answer
273 views

Is global temperature significantly affected by time of galactic year?

There is a claim that different patches of the galaxy have different climate effects due to variations in cosmic ray strength. I've occasionally heard this used to explain global warming but more ...
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7answers
3k views

Is it accurate to say that 97% of experts agree that global warming is anthropogenic?

A recent spate of newspaper headlines reported that 97% of scientists agreed with the theory of anthropogenic global warming (AGW). The UK's Daily telegraph reported: A review of 12,000 scientific ...
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3answers
492 views

Does physics give a climate sensitivity to carbon dioxide of about 3°C?

A letter to the editor of the Economist from Professor Anders Levermann of the Potsdam Institute for Climate Impact Research stated the following: The IPCC’s range on sensitivity is supported by, ...
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2answers
703 views

Are fossil fuels making the world greener?

The popular understanding (at least among those who are not climate skeptics) of global warming is that it is likely to create environmental catastrophe for reasons such as spreading deserts and ...
12
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1answer
463 views

Are the IPCC climate change models overestimating sensitivity to carbon dioxide?

A recent report in The Register suggests that we might be currently overestimating the degree to which the world will warm with increasing carbon dioxide. Climate sensitivity is, crudely, the slope ...
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1answer
431 views

Is avoiding global warming by preventing CO₂ emissions far too expensive compared to geoengineering or adapting to a warmer world?

Experts in the science of global climate change often criticise their opponents by disparaging their expertise in climate science. But experts in climate science are not experts in economics. So when ...
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3answers
677 views

Is climate close to a “tipping point”?

James Hansen has long used the idea of a climate tipping point in his public arguments for urgent and drastic action to combat climate change (For an extended exposition of his idea, see a pdf of one ...
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145 views

Did the Roman Empire and the Han Chinese cause (some) global warming? [duplicate]

Possible Duplicate: Did the development of agriculture prevent an ice age occurring? Some recent news reports about ancient anthropogenic methane emissions have hinted that the simultaneous ...
17
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1answer
2k views

Does being a strong free market supporter correlate with rejection of scientific claims?

The following research claims that there is a link between one being a strong free market supporter and being more likely to reject scientific claims: Paralleling previous work, we find that ...
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2answers
8k views

Does a “mosquito line” exist, above which mosquitos do not travel?

Is there any scientific definition or evidence of such a thing as the mosquito line? My first apartment in Manhattan was on the 25th floor of the Park Row building in the Financial District. The ...
6
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1answer
365 views

Has the Urban Heat Island effect on the US temperature record been underestimated?

One of the early climate-skeptic arguments against the consensus view that the world is warming to a dangerous extent, was that the instrumental record of temperature was corrupted by the Urban Heat ...
3
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1answer
347 views

Will reducing atmospheric CO₂ reverse the effects of climate change over a few decades?

There are many calls to help bring down Carbon Dioxide levels. But what are the effects of such an action? My intuition of the earth as a slow-moving complex system tells me that it will settle into ...
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1answer
406 views

Do women 'consume more sustainably than men'?

European Parliament Committee on Women's Rights and Gender Equality has adopted the resolution "on women and climate change". The report argues that climate change exacerbates gender ...
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409 views

Have western governments spent $100billion on global warming research and advocacy?

The author, Robert M Carter argues against Anthropogenic Global Warning and his book is called Climate: the counter consensus. In it he makes two related claims: that the cumulative funding on climate ...
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4answers
3k views

Will melting icecaps and glaciers cause the ocean to rise?

I often hear people claim "global warming will cause the ice-caps to melt, and that will cause the water levels in the ocean to rise, and that will cause major world-wide flooding." Now, ignoring the ...