Hailstones thrown at climate models

Some scientists attending the American Geophysical Union's second Chapman Conference on water vapour in Oct 1999 expressed doubts about the science on which climate modelling is based. Within the debate about modelling the climate system, water vapour plays a key role. Richard Lindzen of the Massachusetts Institute of Technology believes that the climate models are not correctly assessing the distribution and physical processes that occur when water vapour is transferred to the upper troposphere.