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Originally Posted by NeilBlanchard
We know the major reasons for climate change in the past,
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It depends on who you listen too, some claim that CO2 from volcanic activity or other natural event caused it.
Quote:
Originally Posted by NeilBlanchard
and we know now that climate change at this time is being caused largely by we humans burning fossil fuel. ,
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That is what is being debated, the proof is sketchy at best. Yes increased CO2 can cause warming, but how much that is the question.
Quote:
Originally Posted by NeilBlanchard
The isotopes of carbon dioxide in the atmosphere show this.,
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That only shows that we are the source of the increased CO2, it does not prove that the resulting CO2 increase is the cause of most of the warming.
Quote:
Originally Posted by NeilBlanchard
And we know what the other major forcings are - ,
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It doesn't help when a direct measurement is ignored over a proxy because the proxy shows what they want to see.
Quote:
Originally Posted by NeilBlanchard
and only the increased level of carbon dioxide and explains what the data show.
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No it doesn't.
I have regularly posted pretty direct data on this thread, including the current average temperature deviation, the recent TSI (Total Solar irradiance) until the satellite failed, and often other direct measured facts.
It is currently reported that solar activity is low due to low sunspot number. You yourself have even repeated that. But the fact is that the average TSI is higher this cycle than last cycle by a little bit due to the fact that there are less sun spots for some unknown reason. Higher TSI means higher temperatures.