Paleoclimate Significance of δ¹³C in Stalagmite from Nuanhe Cave, Liaoning Province

详细信息   

• 责任者：Gu Ning (College of Geography Science ; Nanj ing Normal University ; Nanjing 210097 ; China) ; Wu Jiangying
• 刊名：Carsologica Sinica
• 出版年：2012
• 卷期：31(2)
• 关键词：石笋 ; stalagmites ; 古气候 ; paleoclimate ; 辽宁 ; Liaoning Province
• 页码：p.107-114
• 图表：illus., 3 tables, 64 refs.
• 分类号：1400
• issnNo：ISSN1001-4810
• isbnNo：CN45-1157/P

摘要

In light of the U-series dating results, 900 annual laminae, 320 C and O isotopes data and gray level data of stalagmite NH33 from the Nuanhe Cave, δ¹³C and gray level sequence of the stalagmite in recent 1 000 years in the Holocene Optimun（8 638±60～7 748±53）a B.P. are established. Paleo-environments interpreted by the stalagmite-series can be divided into three climate-stages, that is well fitted with the pollen record at the same time.  Some non-climate factors are also contained in stalagmite δ¹³C, which is led by changes in dissolved CaCO₃ of the wall rock affected mainly by water seepage rate. Making regression analysis on the stalagmite δ13C and gray level data can effectively avoid the non-climate factors led by the hydrodynamic conditions.