"Quadibloc" wrote in message
...
On Oct 25, 1:48 am, "Peter Webb"
wrote:

It doesn't even define what "global warming" is, and nor has anybody in
this
thread.

What is global warming?

It's an increase in the worldwide mean temperature, due to increased
levels of greenhouse gases in the atmosphere.

________________________________________
In that case, the study did *not* confirm global warming is real. It did not
consider the causes of warming at all, it only verified that the earth has
indeed warmed and cooled at varous times over the last 200 years.

By your definition, global warming did not occur at the end of previous ice
ages. (Whilst the temperatures increased, this was not preceded by increases
in greenhouse gas levels.)

And its still a very poor definition. It doesn't actually answer the
question. Here is the example I gave befo

Take for example
http://en.wikipedia.org/wiki/File:In...ord_(NASA).svg
The 5 year average global temperature was lower in 1963 than at any time
since 1935. Was "global warming" occurring in (say) 1961? How do you know?
What calculation based on temperatures (which is what was measured)
determines if "global warming" is occurring or not occurring at some point
in time?

I can't see how your definition answers the question as to whether there was
"global warming" at any time between 1935 and 1963. In fact I can't see how
it can be used to determine that global warming was occuring at any point in
time.

Could you provide a worked example which shows us how a global temperature
record (such as that confirmed by this study) can be used to determine if
global warming is occuring at any point in time?

Thanks in advance



Peter Webb