Such circulation changes are the main cause of variations in climate elements on a regional scale, sometimes mediated by parallel changes in the land surface (IPCC, 1990, 1996). (ipcc.ch)
That is raising speculation that lawmakers and the Obama administration may go for a «Plan B» next year that involves passage of a general energy bill without its most complex climate elements. (rogerpielkejr.blogspot.ru)
The most critical shortcomings of the assessment are the attempt to extrapolate global - scale projections down to regional and sub-regional scales and to use two models which provide divergent projections for key climate elements.» (heatisonline.org)