The lines of evidence and analysis supporting the mainstream position
on climate change are diverse and robust — embracing a huge body of direct measurements by a variety of methods in a wealth of locations
on the Earth's surface and from space, solid understanding of the basic physics governing how energy flow in the atmosphere interacts with greenhouse gases, insights derived from the reconstruction of causes and consequences of millions of years of natural climatic variations, and the results of computer models that are increasingly capable of reproducing the main features of Earth's
climate with and
without human influences.
«Previous analyses linking observed impacts to
climate change have been generic in nature, addressing whether there is an
influence of
human - related warming
on impacts globally,
without an inference to individual impacts,» says Hansen.