4 looked at the responses of five DGVMs, coupled to a fast climate analog model, finding dramatic divergence in future behavior, particularly of
tropical vegetation responses to drought and boreal ecosystem responses to elevated temperature and changing soil moisture.
Rainfall change and variability is very likely to affect
vegetation in
tropical grassland and savanna systems with, for example, a reduction in cover and productivity simulated along an aridity gradient in southern African savanna in
response to the observed drying trend of about 8 mm / yr since 1970 (Woodward and Lomas, 2004a).