氢氧同位素记录揭示的巽他陆架末次冰期以来古降水量变化

  • 贺娟
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  • 同济大学海洋地质国家重点实验室, 上海 200092

作者简介:贺娟(1980-),女,陕西延安人,讲师,主要从事有机地球化学、古海洋、古环境研究.E-mail:hj08@tongji.edu.cn

收稿日期: 2017-09-06

  修回日期: 2017-10-25

  网络出版日期: 2018-01-10

基金资助

国家自然科学基金项目“长江口外藻类生物标志化合物氢同位素与海洋盐度关系的研究”(编号:41776049)和“运用叶蜡脂肪酸C-14研究粤西近岸沉积物的来源与运移过程”(编号:41676030)资助

版权

, 2017,

Changes of Paleo-precipitation on the Sunda Shelf Since the Last Glacial Maximum Revealed by Hydrogen and Oxygen Isotopes

  • Juan He
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  • State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

First author:He Juan (1980-), female, Yan’an City, Shaanxi Province, Lecturer. Research areas include organic geochemistry, paleoceanography, palaeoenvironment.E-mail:hj08@tongji.edu.cn

Received date: 2017-09-06

  Revised date: 2017-10-25

  Online published: 2018-01-10

Supported by

Project supported by the National Natural Science Foundation of China “Explore the correlation of hydrogen isotope of alga biomarkers with sea surface salinity off the Yangtze Estuary” (No.41776049) and “Apply the C-14 of leaf wax fatty acid to research the source and migration process of western Guangdong coastal sediments” (No.41676030)

Copyright

地球科学进展 编辑部, 2017,

摘要

巽他陆架因其独特的地理位置,在冰期循环中发生的变化和发挥的作用一直受到科学界的关注。目前对区域内的古温度变化已有一致认识,但对古降水重建的结果却一直存在争议。在巽他陆架区域现有末次冰期以来氢、氧同位素记录的基础上,结合其他资料,将区域内的降水记录大致分为南、北两区。北区冰期时降水量变化不大,气候仍然湿润;而南区降水量下降,气候变干。冰期时巽他陆架南、北区的降水同位素差异可能与区域内的大尺度环流,及南、北降水同位素的主要控制因素不同有关。受目前数据记录的局限,区域内古降水变化的这一划分和降水同位素的差异机制还需要更多工作的补充和完善。

本文引用格式

贺娟 . 氢氧同位素记录揭示的巽他陆架末次冰期以来古降水量变化[J]. 地球科学进展, 2017 , 32(11) : 1137 -1146 . DOI: 10.11867/j.issn.1001-8166.2017.11.1137

Abstract

The Sunda Shelf, owing to its unique geographical location and roles, has attracted much attention on its changes during the glacial cycle. At present, there is a consensus about the change of temperature in the region, but the reconstruction of paleo precipitation has been disputed. The hydrogen and oxygen isotope records since the last glacial in the Sunda Shelf were collected, combining with other paleo climate record, we roughly divided the precipitation records in the region into the Northern and Southern areas. During the glacial, the precipitation changed little and climate remained moist in the northern area, while precipitation decreased greatly,and the climate became dry in the southern. Difference in the precipitation isotopes between the northern and southern areas might be related to the different controlling factors of the precipitation isotopes in the two areas and large-scale atmospheric circulation in the region. Limited by the collected hydrogen and oxygen records, the precise mechanism of division in regional hydrological changes of the region still needs more work to confirm.

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