热带地理 ›› 2016, Vol. 36 ›› Issue (3): 448-456.doi: 10.13284/j.cnki.rddl.002835

• 论文 • 上一篇    下一篇

中国季风区石笋氧同位素气候指示意义: 主要争议与几个重要问题

周厚云,刘淑华,彭小桃,邓肖敏,陈 琼,米小建   

  1. (华南师范大学 地理科学学院,广州 510631)
  • 出版日期:2016-05-05 发布日期:2016-05-05
  • 作者简介:周厚云(1967―),湖南安乡人,教授,博士生导师,主要从事全球变化研究,(E-mail)hyzhou@gig.ac.cn。
  • 基金资助:
    国家自然科学基金项目(41473093、41271212、40973009);教育部博士点基金项目(20120101110050)共同资助

Paleoclimatic Interpretations of Speleothem δ18O Record in Monsoonal China: Controversies and Some Key Issues

ZHOU Houyun,LIU Shuhua,PENG Xiaotao,DENG Xiaomin,CHEN Qiong,MI Xiaojian   

  1. (School of Geography,South China Normal University,Guangzhou 510631,China)
  • Online:2016-05-05 Published:2016-05-05

摘要: 对近些年来国内外广泛争议的话题——中国季风区岩溶洞穴沉积氧同位素组成(δ18O)的气候指示意义进行了梳理,简要介绍了有关争议各方的主要观点。同时针对中国季风区洞穴沉积δ18O的研究提出了几个重要问题:同位素平衡分馏的检验问题、洞穴沉积δ18O记录的相似性(重复性)与差异性,以及洞穴通风可能对洞穴沉积δ18O记录的影响等。这些问题涉及到洞穴沉积δ18O记录与气候指标之间的联系机制,对其探讨可能有助于解决有关争议。因此,建议在今后的研究中应该重点关注这些问题,因为洞穴沉积δ18O与气候环境指标之间的联系机制是中国季风区内应用洞穴沉积δ18O进行古气候古环境研究的基础。

关键词: 岩溶洞穴沉积, δ18O, 夏季风, 同位素平衡分馏, 洞穴通风

Abstract: The paleoclimatic interpretations of speleothem δ18O in the summer monsoon (SM) area of China are widely disputed in recent years. In this paper, we first simply introduce the major viewpoints about the paleoclimatic implications of speleothem δ18O in the SM area of China. Then we raised three key questions which may be crucial to the interpretations of speleothem δ18O record in the SM area of China, such as the test of calcite precipitation under isotope equilibrium conditions, the similarity and variability of different speleothem δ18O records, and the influence of cave ventilation on speleothem δ18O record. Those questions are closely related to the connecting mechanisms between speleothem δ18O records and climate environment in the SM area of China. Answer to those questions may be helpful to settling of the disputation on paleoclimatic interpretations of speleothem δ18O record in the SM area of China. Therefore, we suggest that more attention should be paid to those questions in future.

Key words: speleothem, δ18O, summer monsoon, isotope equilibrium fractionation, cave ventilation