[gondramB]

They have a point - for whatever reason global warming has had more effect in the north, which of course, includes U.S., Europe and Most of Asia.

[ancient_geezer]

There are some questionable adjustments in the GISS series http://www.climateaudit.org/?p=1142.

It is best to plot using GHCN unadjusted data, and one should include the Hadl/Reyn ocean series for completeness and compare apples with apples by plotting January only data change (i.e trend selection) through the full 1951-2007 data set not just January 1971 of the default selection.

Hit the link above in #11.. so the map data and zonal average plot can be seen together.

[backbencher]

According to NASA's mean temperature records, the earth has heated up .7 degrees F since 1910. When is the last time you heard the weatherman quote temperatures to the hundredth degree?

If it's man made global warming, we will have to get our CO2 level down to the pre-1900 according to NASA's records.

[Moseley]

Of course, what is the main difference between activity in the Northern and Southern hemispheres? Not carbon dioxide, but CONCRETE... cities. Is that the reason? I have no idea. And it seems implausible that any human activity could affect the global climate. But it is more plausible (not very) that the expansion of cities and construction absorbs heat than carbon dioxide is responsible (not at all plausible).

HOW exactly does CO2 supposedly trap heat? Does CO2 absorb heat? Well, then, what happens to hot gases? Gases that are heated RISE higher in the atmosphere. Once high up in the upper atmosphere, in the rarefied atmosphere and thin pressure, gases then RADIATE the heat into outer space.

So, does CO2 act as a CONVEYOR BELT... trapping heat in the lower atmosphere and MOVING the heat into the upper atmosphere, where it is radiated into space?

Have there been any repeatable, neutral experiments by unbiased researchers conducted under various conditions at various times and places to show that CO2 raises temperatures on a global scale? NO! Of coure not.

Does CO2 have only the *temporary* effect of trapping heat near the earth, only to radiate it to outer space at higher altitudes, for NO NET increaase?