Rath said:
Adjusting the data due to a known variable is perfectly normal. I assume you are talking about the diurnal drift when you say that? In any case the 0.12 degrees per decade which is shown without the adjustment, while not near the 0.17 degrees expected, is still warming in the troposphere which you previously denied existed at all.
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It is acceptable to make adjustments to collected data if (and only if) the adjustments are small relative to the trend that is being observed; the reason for this is simple, there are hundreds of potential adjustments and a person could cherry pick adjustments for the purpose of supporting a (desired) trend. When a trend is not present in the base data and only appears after the data has been adjusted you’re no longer dealing with a scientific evaluation of the data.
