- #1

Andre

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Suppose I was to publish this study.

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Andre et al, 2006, Earth Albedo variations dwarf greenhouse effect EOS, Vol. 87, No. 4, 24 January 2006

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Is this true? No, unfortunately I did not write that study, however if you look at the data, the logic seems nevertheless to be very true, justifying to write it anyway.

http://home.wanadoo.nl/bijkerk/albedo-temp.GIF

http://home.wanadoo.nl/bijkerk/albedo2.GIF

But with exactly the same albedo data, we see this study instead:

E. Pallé, P R. Goode, P. Montañés rodriguez, SE. Koonin (2006) Can Earth’s Albedo and Surface Temperatures Increase Together? EOS, Vol. 87, No. 4, 24 January 2006

Generating http://www.njit.edu/publicinfo/press_releases/release_818.php based on a completely wrong -not confirmed- assumption about the recent temperatures (still rising - NOT!). The contrary as can be seen at the GISS temp graph.

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Andre et al, 2006, Earth Albedo variations dwarf greenhouse effect EOS, Vol. 87, No. 4, 24 January 2006

*Abstract*

We compute Earth albedo (reflectivity) in the period 1984-2004, using cloud data and coverage, confirmed by measuring reflectivity of the shadow side of the moon. We observe a remarkable decrease in reflectivity in the period 1984- 1997 followed by a gradual increase after that. Correlation of the data with global temperatures (GISStemp Hansen et al) reveals a statistical relevance of R2=0.575 apparently confirming the obvious relationship between reflectivity and temperatures.

The associated variation of energy flux in the Stefan Boltzman law with 10% albedo change, results in a black body temperature change of 2,7 K. However, since the actual temperature variation is a mere 0.6K we must conclude that Earth generates a robust negative feedback that effectively reduces the effects of large albedo changes. This result dwarfs the greenhouse gas forcing theory that considers only flux changes of an order of magnitude less.We compute Earth albedo (reflectivity) in the period 1984-2004, using cloud data and coverage, confirmed by measuring reflectivity of the shadow side of the moon. We observe a remarkable decrease in reflectivity in the period 1984- 1997 followed by a gradual increase after that. Correlation of the data with global temperatures (GISStemp Hansen et al) reveals a statistical relevance of R2=0.575 apparently confirming the obvious relationship between reflectivity and temperatures.

The associated variation of energy flux in the Stefan Boltzman law with 10% albedo change, results in a black body temperature change of 2,7 K. However, since the actual temperature variation is a mere 0.6K we must conclude that Earth generates a robust negative feedback that effectively reduces the effects of large albedo changes. This result dwarfs the greenhouse gas forcing theory that considers only flux changes of an order of magnitude less.

****

Is this true? No, unfortunately I did not write that study, however if you look at the data, the logic seems nevertheless to be very true, justifying to write it anyway.

http://home.wanadoo.nl/bijkerk/albedo-temp.GIF

http://home.wanadoo.nl/bijkerk/albedo2.GIF

But with exactly the same albedo data, we see this study instead:

E. Pallé, P R. Goode, P. Montañés rodriguez, SE. Koonin (2006) Can Earth’s Albedo and Surface Temperatures Increase Together? EOS, Vol. 87, No. 4, 24 January 2006

Generating http://www.njit.edu/publicinfo/press_releases/release_818.php based on a completely wrong -not confirmed- assumption about the recent temperatures (still rising - NOT!). The contrary as can be seen at the GISS temp graph.

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