“…Because temperature change is most often assumed the critical climatic variable in determining landuse, and because temperature decreases with increasing altitude, it is reasonable to expect that upland farming was most susceptible to climatic stress: most workers have sought such human responses to stress in an altitudinal 'retreat from the margins' (Parry, 1978(Parry, , 1981Burgess, 1985;RCAHMS, 1993RCAHMS, , 1997Cowley, 1998). Tipping (2002) collated data on prehistoric land-uses from 14 C dated pollen diagrams in upland regions throughout Scotland, and concluded that there is no consistent evidence from this source for abandonment of upland areas during the Bronze Age-Iron Age boundary. Some well studied regions, such as the northern Cheviot Hills and west Glen Affric (Fig.…”