Just Hit The NOAA Motherlode

I wouldn't put ANYTHING past these people.

I spent the evening comparing USHCN V1 and V2 graphs, and discovered a huge discrepancy between their V1 and V2 adjustments.

This is their current US graph. Note that there is a discontinuity at 1998, which doesn’t look right. Globally, temperatures plummeted in 1999-2000, but they didn’t in the US graph.

But when they switched to V2, they started adjusting older temperatures downwards, and left post-2000 temperatures more or less intact. This created a huge jump (greater than one degree) downwards for all years prior to 2000.

By the time they are done corrupting the data, they have hidden the decline and created a strong warming trend, with 1998, 1999 and 2006 being the three hottest years. Prior to corruption, 1999 and 2006 aren’t even in the top ten.