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在末次冰消期至全新世期间,格陵兰冰芯(GISP2)δ18O记录和北大西洋浮冰记录显示了一系列百年至千年尺度的突然变冷事件.但是这种反复出现的气温变冷模式在环大西洋以外区域,特别是在东亚区域是否也同时存出,还较少直接从温度代用记录方面进行系统研究.为此,从中国吉林省的哈尼泥炭中,提取了一个约14000年的泥炭纤维素δ18O温度代用记录.对比表明,哈尼泥炭纤维素δ18O温度记录几乎全部重现了由GISP2δ18O和浮冰记录所指示的突然的气温变冷事件,例如Older Dryas,Inter-Aller-d,Younger Dryas,以及9次浮冰事件,证明这种反复出现的气温变冷模式不仅出现在高纬度的北大西洋区域,同时也出现在中纬度的西北太平洋区域.此外,进一步论述了全新世的开始时间,大暖期、“8.2ka”事件、“4.2ka”事件、中世纪温暖期和小冰期等特征气候变化事件.同时根据泥炭沼泽生态环境的特征,还论述了哈尼泥炭纤维素δ18O对地表温度敏感响应及泥炭纤维素14C年龄准确性的原因.
During the last ice expulsion to the Holocene, the δ18O record of the Greenpeace Ice Core (GISP2) and the North Atlantic ice drifts showed a series of abrupt chilling events ranging from centennial to millennial scales, but this recurring pattern of cooling in the air Whether the Atlantic Ocean, especially in the East Asian region also exist at the same time, and less direct systematic study of temperature proxy records, a peat cellulose from Hani peat in Jilin Province, China, was extracted for about 14,000 years δ18O temperature substitution records. The comparison shows that the Hani peat cellulose δ18O temperature recordings almost completely reproduced the abrupt temperature cooling events indicated by the GISP2δ18O and ice floe records such as Older Dryas, Inter-Aller-d, Younger Dryas, and Nine ice floes events proved that this recurrent chilling pattern of temperature not only occurred in the high latitudes of the North Atlantic but also in the mid-latitude Pacific Northwest.Furthermore, the beginning of the Holocene, Period, “8.2ka” event, “4.2ka” event, Middle Ages warm season and Little Ice Age and other characteristics of climate change events.At the same time, according to peat swamp ecological environment special The reasons for the sensitivity of Hani peat cellulose δ18O to surface temperature and the accuracy of peat cellulose 14C age were also discussed.