One of the dominant narratives of the whole climate saga is that ‘the earth is warming.’ That ‘humans are to blame’ is usually appended, but a dead cert way to get crossed off the winterval card list is to reply ‘bollocks’ to the first bit. Even if you point out that the data is so bad, and so fiddled that nothing can be inferred from it, you’re an instant pariah.
Here’s a small part of the reason many of us feel that way:
NOAA’s National Climatic Data Center caught cooling the past – modern processed records don’t match paper records
We’ve seen examples time and again of the cooling of the past via homogenization that goes on with GISS, HadCRUT, and other temperature data sets. By cooling the data from the past, the trend/slope of the temperature for the last 100 years increases.
Ken looked at entire years of data from the 1920s and 1930s for numerous different states and found that this ‘cooling’ of the old data was fairly consistent across the board. In fact he produced some charts showing such. Here is an example for the entire year of 1934 for Arizona:
The chart above shows how many degrees cooler each monthly average temperature for the entire state of Arizona for each month in 1934 was compared to the current NCDC database (i.e. versus what the actual monthly temperatures were in the original Climatological Data Summaries published in 1934 by the USWB (U.S. Weather Bureau). Note, for instance, how February is 3.1°F cooler in the current database compared to the historical record.
Read the entire story here: Inconsistencies in NCDC Historical Temperature Analysis .