Tag Archives: CO2

Equilibrium Climate Sensitivity

Posted on May 28, 2013 by Clive Best

There has been much media interest  about “climate sensitivity”, following a recent paper (Otto et al.) which showed lower values than previous IPCC estimates. Climate sensitivity essentially measures  how earth’s  climate reacts to a sudden kick (volcano, meteor, CO2). The new … Continue reading →

Posted in AGW, Climate Change, climate science, GCM, Science | Tagged , , , | 3 Comments

H2O decreasing while CO2 rises !

Posted on April 18, 2013 by Clive Best

Dire predictions of global warming all  rely on positive feedback from  water vapor. The argument goes that as surface temperatures rise so  more water will evaporate from the oceans thereby amplifying temperatures because H2O itself is a strong GHG.  Climate models … Continue reading →

Posted in AGW, Climate Change, climate science, Science | Tagged , , , | 33 Comments

Marcott – Proxy errors and conclusions

Posted on April 13, 2013 by Clive Best

There has been a lot of discussion (see here) about the treatment of errors by  Marcott et al. through  their  Monte Carlo analysis. Since I  avoided any interpolation or Monte Carlo by using only the measured values for each proxy, … Continue reading →

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Evidence that Marcott’s up-tick is an artefact

Posted on March 23, 2013 by Clive Best

I have calculated from scratch the global averaged temperature anomalies for the 73 proxies used by Marcott et al. in their recent Science paper.  The method used is described in the previous post. It avoids any interpolation between measurements and … Continue reading →

Posted in AGW, Climate Change, climate science, Science | Tagged , | 16 Comments

Water Vapor Decline Cools the Earth: NASA Satellite Data

Posted on March 6, 2013 by Clive Best

Guest post by Ken Gregory P.Eng., Friends of Science.org Original article at http://www.friendsofscience.org/index.php?id=483 An analysis of NASA satellite data shows that water vapor, the most important greenhouse gas, has declined in the upper atmosphere causing a cooling effect that is … Continue reading →

Posted in AGW, Climate Change, climate science, Science, Water Feedback | Tagged , , , | 1 Comment

Radiative Forcing of CO2

Posted on February 27, 2013 by Clive Best

This post examines how radiative forcing depends on CO2 concentrations in the atmosphere. In CO2 greenhouse demystified, we calculated the effective emission height where “thermal” photons escape to space . This height depends on the lapse rate temperature and defines … Continue reading →

Posted in AGW, Climate Change, climate science, GCM, Physics, Science | Tagged , , , | 2 Comments

The CO2 GHE demystified

Posted on February 23, 2013 by Clive Best

Abstract: This post describes a new approach to calculating the CO2 greenhouse effect. Instead of calculating radiative transfer  from the surface up through the atmosphere to space, exactly the opposite is done. IR photons originating from space are tracked downwards … Continue reading →

Posted in AGW, Climate Change, climate science, Physics, Science | Tagged , | 9 Comments

Radiative Equilibrium & Convection

Posted on February 11, 2013 by Clive Best

Surface heat loss by moist convection dominates over radiative heat loss from the surface. If somehow you could switch off convection then surface temperatures on Earth would need to rise by about 60 deg.C to bring the atmosphere into a … Continue reading →

Posted in AGW, Climate Change, climate science, Science | Tagged , | 4 Comments

Trends in Atmospheric Water Vapour

Posted on January 25, 2013 by Clive Best

The basis of IPCC predictions is that any moderate warming caused by increased CO2 levels is enhanced by more evaporation from the oceans. Water vapour is itself a strong greenhouse gas and this increase results in a large “positive feedback” … Continue reading →

Posted in AGW, Climate Change, climate science, Oceans, Science | Tagged , , | 18 Comments

Met Office backtracks on Global Warming

Posted on January 8, 2013 by Clive Best

The UK Met Office has revised one of its forecasts for how much the world may warm in the next few years. It says that the average temperature is likely to rise by 0.43 C by 2017 – as opposed … Continue reading →

Posted in AGW, Climate Change, Institiutions, UK Met Office | Tagged , | 32 Comments