江汉平原9.0ka B.P.以来的气候演化:来自江陵剖面沉积物记录

Climatic Change Since 9ka B.P.: Evidence from Jiangling Area,Jianghan Plain,China

对2002年9月在荆州市江陵县发现的9kaB．P.以来的江陵剖面进行^14C测年、粒度、TOC、TN、δ^13C、孢粉等综合分析，重建江汉平原江陵地区9kaB．P．以来古气候古环境演化：9．0～6．07kaB．P．为高温阶段，其间8．1kaB．P．记录到一次较明显降温事件；6．07～4．60kaB．P．为冷干期；4．60～3．44kaB．P．间气候波动频繁，为全新世第二个暖湿期前期阶段；3．44～2．50kaB．P.为高温期，湖沼泥炭发育，是全新世第二个暖湿期后期阶段，为稳定的暖湿阶段；2．50kaB．P．以来温度相对较低，为冷期。江陵地区近9kaB．P．以来气候变化不仅与国内大量研究资料相一致，且在许多较大气候事件上与世界许多研究结果一致，表明江陵气候变化具有全球性。

Jiangling Section covering the last 9000 years, found at Jiangling County, Jingzhou City, Hubei Province in September 2002, is so far the first Holocene geological section at the Jianghan Plain. By analyzing several palaeoclimatic proxies such as TOC, TN, δ^13Corg, grain size and pollen, we reconstruct the climatic and environmental changes since 9 ka B. P. at the Jianghan Plain. The climate in this area was warm and wet in the period of about 9.0 - 6.07 ka B. P. , while, a cooling event occurring around 8.1 ka B.P. is recorded by Jiangling Section; coldness and aridity period was between 6.07 - 4.60 ka B. P. ; climatic fluctuation is especially frequent between 4.60 - 3.44 ka B. P. ; ahithermal period was between 3.44 - 2.50 ka B. P. , meanwhile, limnie peat is widely developed ; and a cold period occurred after 2 . 5 0 ka B . P . The climatic changes over the last 9 000 years in Jiangling area were coincident with large numbers of research information from domestic, moreover, many obvious climatic events were in good agreement with many international study result. It is showed that ellmatic change in Jiangling region is characterized by globality.