| 摘要: |
| 为深入理解地球轨道参数、冰量和大气温室气体等驱动因素对全球温度变化的影响，以及评估当今全球变暖情况下自然气候变化的长期背景，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，对已发布的全球过去30 ka温度记录进行汇总和集成（数据存储格式为.xlsx）。数据库中选用的温度记录均为定量重建结果，其中时间序列至少需要覆盖16—10 ka BP的末次冰消期时段。所有的温度记录来自265个地点，包括海洋沉积物（80%）、湖泊沉积物（14%）、泥炭（2%）、冰川冰（2%）和其他记录。根据年代质量、时间跨度和分辨率对数据进一步分级。根据原始文献描述，绝大多数（约95%）记录为年均温度或暖季节温度，冷季节温度很少。初步集成分析结果显示：末次冰消期升温最早发生在南半球，而北半球升温开始较晚，特别是在中纬度地区滞后约3 ka。同时，发现陆地和北半球中低纬地区经历了更长的升温过程，直到中全新世达到温度最大值。此外，全新世海洋和陆地以及不同纬度的温度集成结果呈现不同的变化趋势，说明全球全新世温度变化具有显著的空间差异性。相关温度数据对更好地理解过去30 ka的温度变化模式和机制具有重要的参考意义。 |
| 关键词: 全球温度集成 古气候 全新世 末次冰消期 |
| DOI：10.7515/JEE243008 |
| 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 global database of paleotemperature records since 30 ka and preliminary integrated analysis |
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ZHANG Qianwen 1, 2, ZHAO Jiaju 1*
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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: |
| To better understand the influence of Earth’s orbital parameters, ice sheets, and atmospheric greenhouse gases on global temperature changes and assess the long-term context of natural climate variability in the face of current global warming, with the support of the CRESTS project, published global temperature records in the past 30 ka were compiled and integrated (the database is sorted in .xlsx). In the database, all temperature records are quantitative reconstructions with time series cover 16—10 ka BP. The data were compiled from 265 sites, including marine sediments (80%), lake sediments (14%), peat (2%), glacial ice (2%), and other sources. The temperature records were further classified by chronological quality, time span, and resolution. According to descriptions in the original literature, the vast majority (about 95%) of the records represent annual mean temperatures or warm-season temperatures, with few representing cold-season temperatures. The preliminary integrated analysis results show that the temperature rise during the last deglaciation period occurred earliest in the Southern Hemisphere, while in the Northern Hemisphere started relatively late, especially in mid-latitude areas, with a lag of about 3 ka. Meanwhile, the land temperature stack and the low latitude temperature stack in the Northern Hemisphere experienced a longer warming process until reaching the maximum temperature in the Middle Holocene. In addition, the temperature records for the land and ocean, as well as different latitudes, show different trends during the Holocene, indicating significant spatial differences in global Holocene temperature. The related temperature data are of great reference value for understanding the patterns and mechanisms of temperature change over the past 30 ka. |
| Key words: global temperature integration paleoclimate Holocene the last deglaciation |
