All Scientists are Sceptics ~Professor Bob Carter

Whenever someone asserts that a scientific question is “settled,” they tell me immediately that they don’t understand the first thing about science. Science is never settled. Dr David Deming

Perhaps the most frustrating aspect of the science of climate change is the lack of any real substance in attempts to justify the hypothesis ~Professor Stewart Franks

A lie told often enough becomes the truth.
-- Vladimir Ilyich Lenin - See more at: http://thepeoplescube.com/lenin/lenin-s-own-20-monster-quotes-t185.html#sthash.aTrSI3tG.dpuf
A lie told often enough becomes the truth.
-- Vladimir Ilyich Lenin - See more at: http://thepeoplescube.com/lenin/lenin-s-own-20-monster-quotes-t185.html#sthash.aTrSI3tG.dpuf
A lie told often enough becomes the truth.
-- Vladimir Ilyich Lenin - See more at: http://thepeoplescube.com/lenin/lenin-s-own-20-monster-quotes-t185.html#sthash.aTrSI3tG.dpuf

Wednesday, 20 June 2012

Warming and rising atmospheric CO2 is GREENING the Earth

CO2 Science reports -In a team led by Rogier de Jong as published in Global Change Biology - that "it can readily be appreciated that the twin evils of the world's climate alarmists - rising atmospheric CO2 concentrations and global warming - have actually been what has fueled the last quarter-century's greening of the earth."

What was done
In a study designed to determine the net long-term trend in vegetative vigor of the entire planet, De Jong et al. employed "detection of trend changes in normalized difference vegetation index (NDVI) satellite data between 1982 and 2008," based on "time series of 648 fortnightly images [that] were analyzed using a trend breaks analysis procedure," which feat was accomplished for fourteen different classes of land cover (biomes).


What it means
In discussing the current state of knowledge in this area, De Jong et al. write that "over the last few decades of the 20th century, terrestrial ecosystems acted as net carbon sinks, as evidenced by ecosystem process models and satellite vegetation data (Myneni et al., 1997; Schimel et al., 2001; Zhou et al., 2001)." And they say that "the easing of climatic constraints on plant growth as a result of increased CO2 concentrations and higher temperatures is a likely explanation for this effect (Nemani et al., 2003)." Thus, it can readily be appreciated that the twin evils of the world's climate alarmists - rising atmospheric CO2 concentrations and global warming - have actually been what has fueled the last quarter-century's greening of the earth.

  
Reference
De Jong, R., Verbesselt, J., Schaepman, M.E. and De Bruin, S. 2012. Trend changes in global greening and browning: contribution of short-term trends to longer-term change. Global Change Biology 18: 642-655.
 

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