A person on Twitter made some comments about my last post, and I updated it in response. Part of that update was two new images I made. I've since realized the issue I highlight in the update deserves more attention than being buried at the end of a post, and as such, I've decided to create a new post for them. My hope is this "shot" in the "war" can serve as a warning for others.
First, Steven Goddard's graph:
I attempted to replicate that graph, and my results were reasonably close. I then made two changes. I removed the use of post-1980 data as we're looking at the temperature record created from 1980 data. I also picked a baseline that doesn't makes the old and new data look as bad as possible. That produced this graph:
We could leave it at that and say, "After 30 years, of course there will be differences." However, there is one last aspect of Goddard's image which is deceptive. He cited e-mails discussing a desire to adjust ocean temperatures, but the graph he displayed uses only data gathered from surface stations.
Naturally, one might be curious what the record using ocean temperatures looks like compared to the old record. The record including ocean data has more data in it, and as such, it's what is recommended for use. The comparison with it is striking:
Remember, according to Goddard, the people making this temperature series committed fraud by cooling the past and warming the present.