I would assume that if thermometer data is available, it is being used.
As for trusting tree ring data, this is an entirely different issue from this "Climate Gate" affair. That was, btw., an internal email, so nobody was supposed to trust anything. It was scientists exchanging some data. Surely it is allowed to LOOK at tree ring data.
As for trusting tree ring data, this is an entirely different issue from this "Climate Gate" affair. That was, btw., an internal email, so nobody was supposed to trust anything. It was scientists exchanging some data. Surely it is allowed to LOOK at tree ring data.