On Oct 28, 4:42*am, Roger Coppock wrote:
On Oct 28, 12:53*am, Last Post wrote:
[ . . . ]

* * If it comes from NASA those numbers are
* * meaningless since September is the beginning
* * of spring in the Southern hemisphere.

September was beginning of Spring in the Southern Hemisphere for every
one of the last 130 years. *NASA data say this September was the
warmest in all those 130 years.

•• And you believe James Hansen???

**1. No average temperature of any part of the earth's
surface, over any period, has ever been made.

How can you derive a "global average" when you do
not even have a single "local" average?

What they actually use is the procedure used from
1850, which is to make one measurement a day at the
weather station from a maximum/minimum
thermometer. The mean of these two is taken to be the
average. No statistician could agree that a plausible
average can be obtained this way. The potential bias is
more than the claimed "global warming.

**2. The sample is grossly unrepresentative of the
earth's surface, mostly near to towns. No
statistician could accept an "average" based on
such a poor sample. It cannot possibly be
"corrected"