%0 Journal Article
%T Paleotemperature changes over the past 3000 years in eastern Beijing, China: A reconstraction based on Mg/Sr records in a stalagmite<br>Paleotemperature changes over the past 3000 years in eastern Beijing,China:A reconstraction based on Mg/Sr records in a stalagmite
%A MA Zhibang
%A LI Hongchun
%A XIA Ming
%A KU Tehlung
%A PENG Zicheng
%A CHEN Yushu & ZHANG Zhaofeng
%A <br>MAZhibang
%A LIHongchun
%J 科学通报(英文版)
%D 2003
%I 
%X The Mg/Sr ratio in a stalagmite, which is directly proportional toD Mg/ca, the solid-liquid distribution coefficient of Mg, is proposed as a geochemical thermometer to estimate paleotemperature changes. The paleotemperature change in eastern Beijing over the past 3000 years has been reconstructed by using this thermometer in the stalagmite ZFFS-1 from Jingdong Cave. The records can be divided into two periods: 3000–2000 aBP, cool and wet, the air temperature averaging 9.8°C; and 2000 aBP-present, hot and dry, the air temperature being 1°C higher than the mean value (11.7°C) of the past 3000 years. During 500–200 aBP, the air temperature was about 1.2°C lower than that of the present, corresponding to the Little Ice Age in Europe. Like δ18O and δ13C, Mg/Sr (orD Mg/Ca) reflects an obviously warming trend of the past 200 years. These results are supported by historic records.
%K Beijing
%K Jingdong Cave
%K Mg/Sr record
%K paleotemperature
%K stalagmite<br>北京
%K 京东溶洞
%K 石笋
%K Mg/Sr记录
%K 古气温
%K 测年
%K 3000年
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=775E1DB62E25A5CB1055A44BDAC94CCB&yid=D43C4A19B2EE3C0A&vid=B6DA1AC076E37400&iid=E158A972A605785F&sid=396DD691E964F390&eid=8ACD9060100C26F1&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=0