It is also robust to the use of different climate models, different methods for estimating the responses to external forcing and variations in the analysis technique. (dotearth.blogs.nytimes.com)
The scientists point out they used a range of different climate models and not all gave the same result. (carbonbrief.org)
That the climate change exists is certain - ice ages, dinosaurs, coal deposits, oil; all these are evidence of a very different climate in previous years. (aljazeera.com)