As someone with expertise in computer science, I cannot see any way this can be an outcome of an automated algorithm of any reasonable design.
Of course, it couldn't simply be... that this was what the actual data showed! No, someone has to be lying to him.
Sometimes I lament the invention of the Internet. There is so much just play shitty information going around, like House's, that truth and decency no longer has any meaning. And it could conceivably affect the existence of mankind, if enough people believe this kind of thing.
Personally, I'd like to see the NSIDC sue House for libel. I'd like to see any climate scientist sue the next yahoo who calls them a liar or fraud or worse. That would be interesting, and long overdue.