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New paper: How much of the global temperature change is natural?

May 17, 2015
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Originally posted on Watts Up With That?:

Holocene century-on-century changes have a standard deviation close to 1deg C, so if there is a signal due to carbon dioxide, it still has not emerged from the background noise

diceGuest essay by Philip Lloyd

A paper of mine has just appeared in Energy and Environment:

(Lloyd, Philip J. An estimate of the centennial variability of global temperatures.  Energy & Environment, 26(3), pp. 417–424 2015. DOI: 10.1260/0958-305X.26.3.417

with an abstract:

“There has been widespread investigation of the drivers of changes in global temperatures. However, there has been remarkably little consideration of the magnitude of the changes to be expected over a period of a few decades or even a century. To address this question, the Holocene records from several ice cores up to 8000 years before present were examined. The differences in temperatures between all records which are approximately a century apart were determined, after any trends in the data…

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In the climate debate, hear both sides

May 14, 2015
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Originally posted on Watts Up With That?:

By Christopher Monckton of Brenchley

In May 2015, the Pennant, a biannual magazine for retired UK armed forces personnel, carried an article entitled The Earth’s Climate by Rob Varley, chief executive of the Met Office, the world’s oldest national weather bureau.

The Met Office article does not represent a fair or balanced summary of the science on the climate question. This detailed response, prepared at the suggestion of a reader of the Pennant, is illustrated with some 50 well-sourced graphs that are intended to be clear at a glance. The key facts that restore balance to the discussion may be gained from these graphs in five minutes.

The greenhouse effect, with the consequence that (all other things being equal) our returning to the atmosphere some minuscule fraction of the 30,000 μmol mol–1 CO2 formerly resident there may cause some warming, has been posited hypothetically, demonstrated empirically and explained theoretically…

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22 Very Inconvenient Climate Truths

May 12, 2015
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Originally posted on Watts Up With That?:

Here are 22 good reasons not to believe the statements made by the Intergovernmental Panel on Climate Change (IPCC)

22-inconvenienttruths-on-global-warmingGuest essay by Jean-Pierre Bardinet.

According to the official statements of the IPCC “Science is clear” and non-believers cannot be trusted.

Quick action is needed! For more than 30 years we have been told that we must act quickly and that after the next three or five years it will be too late (or even after the next 500 days according to the French Minister of foreign affairs speaking in 2014) and the Planet will be beyond salvation and become a frying pan -on fire- if we do not drastically reduce our emissions of CO2, at any cost, even at the cost of economic decline, ruin and misery.

But anyone with some scientific background who takes pains to study the topics at hand is quickly led to conclude that…

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On the Pause in Global Sea Ice Anomalies

May 11, 2015
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Originally posted on Watts Up With That?:

Guest Post by Bob Tisdale

I just finished the illustrations and text for another chapter of my upcoming book. The latest was about sea ice data. I believe you’ll be interested in one of the topics from that chapter. As noted in the title of the post, the topic is the “pause” in global sea ice extent anomalies.

It is well known that there have been gains in sea ice extent and area in the Southern Hemisphere during the satellite era. Those gains have been exceeded by the losses of sea ice in the Northern Hemisphere, so that globally there has been an overall decrease in sea ice extent and area.

There was a resurgence of sea ice globally in 2013 and 2014, however. That recent resurgence allows us to present the data in another way. We can use a linear trend analysis, starting in April 2015, to determine how…

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Temperature and TOA Forcing

May 9, 2015
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Originally posted on Watts Up With That?:

Guest Post by Willis Eschenbach

I’ve been thinking about temperature and top-of-atmosphere (TOA) forcing. TOA forcing is the imbalance between the TOA upwelling and downwelling radiation. The CERES satellite dataset contains observations of the TOA radiation imbalance on a gridcell-by-gridcell basis. It is calculated as the downwelling solar radiation for that month by gridcell, minus upwelling reflected solar radiation, minus upwelling longwave radiation. Figure 1 shows the distribution of the TOA radiation imbalance around the planet.

Average TOA Radiation Imbalance 2000 2014Figure 1. Average top-of-atmosphere (TOA) imbalance. 

Some areas in Figure 1, such as those around the tropics, absorb more radiation than they emit (positive values). The extra-tropics and the poles, on the other hand, emit more radiation than they are absorbing (negative values). The balance is maintained by the constant transfer of heat between the tropics and the poles by means of the ocean and atmosphere .

We can also take a look at…

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Miskolczi destroys greenhouse theory

May 8, 2015

Originally posted on ClimateTruth:

Editor’s note: In response to reader interest in Dr. Ferenc Miskolczi’s provocative greenhouse theory challenging the widespread belief in man-caused global warming, Climate Truth has asked the former NASA researcher to explain his work further. Earlier this week he attacked the prevailing climate-change theory, calling it “a lie.”
 
At Dr. Miskolczi’s request, we also have posted his letter sent last year to the Environmental Protection Agency, summarizing his research and questioning the agency’s efforts to declare CO2 a harmful pollutant that poses a threat to earth’s climate.
 
Climate Truth: Has there been global warming?
Dr. Miskolczi: No one is denying that global warming has taken place, but it has nothing to do with the greenhouse effect or the burning of fossil fuels.
 
Climate Truth:  According to the conventional anthropogenic global warming (AGW) theory, as human-induced CO2 emissions increase, more surface radiation is absorbed by the…

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Quantifying the anthropogenic contribution to atmospheric CO2

May 8, 2015

Originally posted on Climate Etc.:

by Fred Haynie

I conclude that, the IPCC’s model assumptions that long-term natural net rate of accumulation is constant and anthropogenic emission rates are the only contributor to total long-term accumulation of atmospheric CO2, is false.

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