| 摘要: |
| 两极冰盖在全球气候变化方面发挥着关键作用，而当今全球变暖背景下两极冰盖的快速消融势必会引起一系列的气候环境效应。然而，目前末次间冰期以来南北半球冰量变化的综合对比研究工作较为欠缺。鉴于此，在崂山实验室“穿越地球时空的亚太海陆气候演化”项目支持下，系统收集和整理130 ka以来基于深海底栖有孔虫氧同位素、模拟等方法定量重建的南北半球冰量记录，以及可用于指示冰量变化的定性记录，如南北半球中高纬温度记录、粉尘记录、海洋沉积物冰筏碎屑记录等（数据集储存格式为.xlsx）。不同的指标响应冰盖变化的灵敏度存在差异，总体而言，130 ka以来南、北半球冰盖均发生了三次快速扩张，其中北半球扩张较快，在深海氧同位素4-2阶段总量超过了南半球。此外，深海氧同位素3阶段不同记录重建的北半球冰量存在很大差异。收集的相关数据资料对更好地理解过去130 ka以来的南北半球冰量变化模式和机制具有重要参考意义。 |
| 关键词: 南北半球冰量 末次冰期旋回 深海氧同位素3阶段 |
| DOI：10.7515/JEE243009 |
| CSTR： |
| 分类号: |
| 基金项目:崂山实验室科技创新项目（LSKJ202203300） |
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| A database of northern and southern hemisphere ice sheet volume since 130 ka and preliminary analysis |
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ZHANG Qianwen1, 2, ZHAO Jiaju1*
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1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| The formation and evolution of bi-polar ice sheets contribute significantly to global climatic changes. Under the current context of global warming, the rapid melting of polar ice sheets is certain to induce a series of climatic and environmental effects. However, there remains a lack of comprehensive comparative study conducted on the northern and southern hemisphere ice sheet volumes in the past 130 ka. In view of this, the CRESTS project, is involved in this paper to systematically collect and organize the separate hemisphere ice volume records in the past 130 ka, including quantitatively ice volume records based on deep-sea benthic foraminifera oxygen isotopes and simulations, and qualitative records that indicate ice volume changes, such as mid- and high-latitude temperature records, dust records, and marine sediment ice-rafted debris records (the database is sorted in .xlsx). The sensitivities of different indicators responding to ice sheet changes are different. Overall, ice sheets in both hemispheres have experienced three rapid ice sheet expansions since 130 ka, with the total Northern Hemisphere ice volume expanding more rapidly and surpassing the Southern Hemisphere ice volume during the deep-sea oxygen isotope stages 4-2. Furthermore, there are significant differences in reconstructed Northern Hemisphere ice volume based on different records during the marine isotope stage 3. The data collected in this study provide important references for better understanding the patterns and mechanisms of ice volume changes in both hemispheres over the past 130 ka. |
| Key words: northern and southern hemisphere ice volume the last glacial-interglacial cycle marine isotope stage 3 |
