“…During the period from the Eastern Han to the Western Jin dynasties (AD 25-316), climatic changes with severe natural disasters, frequent droughts, harvest failure, famine, frequent population migration, and social upheavals were recorded in many Chinese documents (Wang and Wang, 1987;Shi et al, 1992). Stalagmite oxygen isotope values from Dongge Cave (DA) in southern China (Dong et al, 2006;Li et al, 2010;Zhang et al, 2010), high-resolution records of d 18 O and snow accumulation variations in the Guliya ice core from the east of Tibetan Plateau (Shi et al, 1999), and tree-ring records form the central-eastern Tibetan Plateau and the Qaidam Basin (Huang et al, 2010a,b) all indicate an episode of climatic cooling and severe aridity between AD 60 and 200. A climatic event between AD 150 and AD 350 was also identified in the reconstructed 2000-year temperature curves based on various climatic proxies from all over the world (Meese et al, 1994;Loehle and McCulloch, 2008;Kaufman et al, 2009).…”