中文摘要：

对南京江北地区林峰桥剖面晚更新世末期以来的两个泥炭层有机碳同位素测定结果表明，上部泥炭层和下部泥炭层δ^13C值皆较低（≤-23．79‰），部泥炭层的δ^13C值明显高于下部泥炭层。结合其它研究可知，该区全新世大暖期稳定暖湿鼎盛阶段的校正年代约在8．2～7．0ka B．P．，在此阶段前后，表现为持续时间相对较短的低温气候环境。12．8—12．1cal．ka B．P．该区气温高低波动频繁期。12．8～12．7cal．ka B．P．和12．6．12．2ka B．P．两时段气温较低；2．7～12．6cal．ka B．P．阶段气温较高。12．2-12．1cal．ka B．P．表现为Younger Dryas之后气候的迅速增暖，可视为该区全新世开始的标志。

英文摘要：

Based on the analysis on the characteristics of the organic carbon isotope of the peat stratum in Linfengqiao profile on the north bank of the Changjiang（Yangtze） River in Nanjing since the last stage of the Late Pleistocene, it is shown that the δ^13C values of both in the upper and lower peat stratum in Linfengqiao profile are lower than -23.79‰, and their organic matter is from C3 plants. The δ^13C values of the upper peat stratum are higher than that of the lower. The result of 14C dating indicates that the upper peat stratum was mainly formed in the Holocene Megathermal and the lower peat stratum was mainly formed in the period of Younger Dryas. So it can be seen that the formation of peat does not absolutely lie on the climate changes. Combined with other research conclusions, it is confirmed that Holocene Megathermal Maximum was about between 8.2 cal. ka B. P. and 7.0 cal. ka B. P. in this area, before and after this period, the temperature had been down for a shorter time. During 12.8 - 12.1 cal. ka B. P. , the temperature fluctuated frequently in this area. The temperature was lower in the two periods of 12.8 - 12.7 cal. ka B. P. and 12.6 - 12.2 cal. ka B. P. , and they could contrast with the events of Older Dryas and Younger Dryas respectively. The temperature during 12.7 - 12.6 cal. ka B. P. was higher and it could contrast with the event of Allerod. In the period of 12.2 - 12.1 cal. ka B. P. , it shows that after the event of Younger Dryas, the climate became warmer rapidly, so it could be regarded as the beginning of the Holocene.