林峰桥剖面粒度、地球化学等环境替代指标的研究结果表明:全新世大暖期在本区是一个区域性的相对暖湿的气候演变期,其中穿插至少有三次变干、变冷的极端气候突变事件,这些突变事件的发生给长江三角洲地区新石器文化的发展带来了灾难。这些气候突变事件可能是这些时期北极涡流扩张及经向大气环流加强的直接结果,同时也与大洋表面温度(SST)变化有着密切的联系。现在一般认为长江三角洲地区人类文明的兴衰是由多次古洪水造成的,但新石器时期以来出现的许多寒冷及干旱气候也曾对该区人类的生存构成威胁,即是多种环境因素共同作用的结果,而不是受单一气候环境因素的影响。
Results of such environmental proxies as grain-size and geochemistry indicate that so-called Mid-optimum was a regional, relatively warm-humid climate evolution period. The on-set of Mid-optimum and its specific characteristics in different regions were distinct, and it was a warm-humid period with several climate evolution periods. At least three climate extremes occurred to this period, and these climate events brought damage to the Neolithic cultural evolution in the Yangtze area. These abrupt climate events may be the direct out-math of the expansion of North vortex and the increased strength of latitude air flow, and also of the changes of SST. Some suggest that several Neolithic cultural hiatuses in the Yangtze area are caused by great palaeo-flood occurred during the Holocene, some harsh environmental conditions such as aridity, frigidity, however, also have influences on the development of the Neolithic culture in the Yangtze area. Generally speaking, the main aim of the human activity to transform the natural condition is to better the human living condition, but unfortunately, some human short-sighted activity may cause unprofitable consequence which may cause damage to the human living circumstances.
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