| 摘要: |
| 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，收集106条全球范围内不同区域130 ka以来基于长链烯酮、有孔虫属种转换函数及其氧同位素、冰芯、四醚膜脂类生物标志物（GDGTs）、硅藻组合、孢粉等不同代用指标的温度变化序列（数据存储格式.xlsx），并采用归一化的方法，初步对这些数据进行集成和分析。从数据上看，130 ka以来的温度数据较好地覆盖了南半球和北半球，代表性较高。其中，南半球共收集49条数据，平均分辨率约为1700 a。北半球共收集57条数据，平均分辨率约为1500 a。相较而言，海洋温度记录较多，共收集91条，平均分辨率约为1700 a，而陆地温度记录较少，仅为15条，数据平均分辨率约为800 a。初步分析结果显示：130 ka以来的全球温度变化趋势基本一致，都经历了末次间冰期（暖）—末次冰期（冷）—全新世（暖）相对完整的冰期-间冰期大循环。不管对南半球还是北半球，除海洋GDGTs外，多数指标（浮游有孔虫氧同位素、长链烯酮、冰芯氢氧同位素和Mg/Ca比）显示MIS 5e是130 ka以来最暖时期，而末次冰期冰盛期则是最冷时期。此外，不同代用指标之间重建的温度变化也略有差异，例如浮游有孔虫氧同位素重建的温度表现出较大变率以及更加频繁的千年尺度波动，而陆地GDGTs重建的末次冰盛期温度极低值发生时间早于海洋记录，造成这种差异的原因值得进一步研究和分析。相关数据资料对更好地理解过去130 ka以来的温度变化模式和机制具有重要的参考意义。 |
| 关键词: 末次间冰期 温度集成 古气候 生物标记物 |
| DOI：10.7515/JEE243007 |
| CSTR：32259.14.JEE243007 |
| 分类号: |
| 基金项目:崂山实验室科技创新项目（LSKJ202203300） |
| 英文基金项目:Science and Technology Innovation Project of Laoshan Laboratory (LSKJ202203300) |
|
| Integration and analysis of global temperature series since 130 ka |
|
LU Hongxuan1, 2*, SHENG Weijuan1, LIU Xu3
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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. Laoshan Laboratory, Qingdao 266061, China
3. Xi’an Institute for Innovative Earth Environment Research, Xi’an 710061, China
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| Abstract: |
| Supported by the “Evolution of the Asia-Pacific Land-Sea Climate Across Earth’s Time and Space” project at Laoshan Laboratory, this study collected 106 temperature records from various regions around the world dating back to 130 ka. These records utilize diverse proxy indicators, including long-chain alkenones, foraminiferal transfer functions and their oxygen isotopes, ice cores, glycerol dialkyl glycerol tetraethers (GDGTs), diatom assemblages, and pollen. Using normalization methods, the data were integrated and analyzed. The temperature data provide comprehensive coverage of both the Southern and Northern Hemispheres. Specifically, 49 data series were collected for the Southern Hemisphere with an average resolution of approximately 1700 a, and 57 data series were collected for the Northern Hemisphere with an average resolution of approximately 1500 a. There are more ocean-temperature records, with 91 series and an average resolution of approximately 1700 a, whereas there are fewer land-temperature records, with only 15 series and an average resolution of approximately 800 a. Preliminary analysis indicates a generally consistent global temperature change trend over the past 130 ka, following a glacial-interglacial cycle: the last interglacial period (warm), the last glacial period (cold), and the Holocene (warm). Most indicators (planktonic foraminiferal oxygen isotopes, long-chain alkenones, ice core hydrogen-oxygen isotopes, and Mg/Ca ratios), suggest that the marine isotope stage (MIS) 5e was the warmest period, while the Last Glacial Maximum (LGM) was the coldest. In addition, there are slight differences in the temperature variations reconstructed by different indicators. For example, the temperature reconstructed from planktonic foraminiferal oxygen isotopes shows greater variability and more frequent millennial-scale fluctuations, while the timing of the extreme low temperatures during the LGM reconstructed from land branched GDGTs occurs earlier than in the marine records. Therefore, advancing fundamental theoretical research on various temperature proxies and investigating differences in land-sea temperature changes is particularly important. The data collected in this study provides a better understanding the temperature-change patterns and mechanisms over the past 130 ka. |
| Key words: the last interglacial paleotemperature integration paleoclimate biomarkers |
