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| DOI | 10.1016/j.earscirev.2020.103216 |
| New insights on Chinese cave delta O-18 records and their paleoclimatic significance | |
Liu, Xiaokang; Liu, Jianbao ; Chen, Shengqian; Chen, Jianhui; Zhang, Xu; Yan, Jingjing; Chen, Fahu
| |
| 通讯作者 | Liu, JB (通讯作者) |
| 发表日期 | 2020 |
| ISSN | 0012-8252 |
| EISSN | 1872-6828 |
| 卷号 | 207 |
| 英文摘要 | In the last two decades, stalagmite oxygen isotope (delta O-18) records have been widely used to study the evolution of the paleomonsoon. Nevertheless, interpreting cave delta O-18 records in eastern monsoonal China as an indicator of East Asian summer monsoon (EASM) rainfall has been intensively debated. This study provides new insights into Chinese cave delta O-18 records and their paleoclimatic significance, based on recent research progress. The following points are highlighted: (1) Chinese cave delta O-18 records do not reflect changes in summer rainfall throughout the whole of eastern monsoonal China, which is evident by comparing monitored summer rainfall amount in eastern China and an integrated Chinese cave delta O-18(syn) proxy. (2) Chinese cave delta O-18 records can document millennialscale EASM events, due to the sensitive response to large-scale atmospheric circulation changes. (3) During the early Holocene (before similar to 7 ka), a decoupled relationship between Chinese cave delta O-18 records and EASM rainfall (as represented by precipitation in North China) is attributed to the reduction of rainfall in North China, due to the influence of remnant melting ice sheets in the northern high-latitude region. (4) When the ice sheet boundary conditions were stable and ice sheets were small (after similar to 7 ka), there is an indirect correlation between the Chinese cave delta O-18 and rainfall changes in North China. (5) The first continuous speleothem delta O-18 record spanning the entire Holocene is synthesized for the core region of the Indian summer monsoon (ISM)-domain. Comparison of this integrated ISM proxy with Chinese cave delta O-18 records reveals that in China cave delta O-18 is primarily a signal of changes in the tropical monsoon and related large-scale circulation. The coupled relationship between rainfall in North China and tropical monsoon (ISM) rainfall is attributed to the response of downstream circulation to changes in circulation upstream, while their decoupled relationship is due to the possible effects of northern high-latitude ice sheets on reducing rainfall in North China. (6) Due to the imprecise definition of monsoon intensity, we suggest that cave delta O-18 can be used as an EASM proxy, if monsoon intensity is defined by changes in atmospheric circulation. |
| 关键词 | EAST-ASIAN SUMMERMONSOON PRECIPITATION CHANGESHOLOCENE CLIMATE CHANGESNORTH-CENTRAL CHINAHIGH-RESOLUTIONSTALAGMITE DELTA-O-18LOESS PLATEAUICE-AGEATMOSPHERIC CIRCULATIONLAST DEGLACIATION |
| 英文关键词 | Chinese cave delta O-18; Rainfall amount; East Asian summer monsoon; Ice sheet; Tropical monsoon; Circulation change |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000556899700009 |
| 来源期刊 | EARTH-SCIENCE REVIEWS
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/259703 |
| 推荐引用方式 GB/T 7714 | Liu, Xiaokang,Liu, Jianbao,Chen, Shengqian,et al. New insights on Chinese cave delta O-18 records and their paleoclimatic significance[J]. 中国科学院青藏高原研究所,2020,207. |
| APA | Liu, Xiaokang.,Liu, Jianbao.,Chen, Shengqian.,Chen, Jianhui.,Zhang, Xu.,...&Chen, Fahu.(2020).New insights on Chinese cave delta O-18 records and their paleoclimatic significance.EARTH-SCIENCE REVIEWS,207. |
| MLA | Liu, Xiaokang,et al."New insights on Chinese cave delta O-18 records and their paleoclimatic significance".EARTH-SCIENCE REVIEWS 207(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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