Outside the realm of political propaganda, I don't believe there is such a thing as a "climate scientist".
There's a science of meteorology, but "climatology" hardly existed until there was a lucrative market for grant proposals to support the political goals of the global warming propagandists.
Global warming is where the money is, and these guys are as honestly scientific as the "expert witnesses" sleazeballs like Silky Pony hire for their testimony.