| 摘要: |
| 末次间冰期的气候研究对揭示地球气候变迁和预测未来气候至关重要，其环境条件与全新世相似，有助于作为预测未来气候变化的关键参考。西风环流和冬季风作为全球气候系统的关键组成部分，对地球系统的能量交换和粉尘、碳循环有显著影响，而粉尘循环则直接影响人体健康和全球生态系统的稳定。因此，有必要对西风、冬季风、粉尘循环过程进行统筹考虑以充分理解三者与全球气候变化之间的相互作用机理。综合集成并初步分析130 ka以来全球西风、冬季风和粉尘通量的长期变化特征及其对古气候变化的指示意义，结果表明：在北半球，亚欧大陆的西风变化在间冰期西风环流较强，气候较为湿润，而在冰期则相对较弱。北美大陆的西风变化则表现为冰期环流南迁，间冰期北撤，且西风控制下气候较为湿润。南半球的新西兰地区冰期西风较强，且西风带在冰期向北移动，导致较好的水汽条件。东亚冬季风的变化显示冰期风力强于间冰期，尤其在末次冰期（MIS2）达到最强。全球粉尘通量的变化则显示冰期粉尘量高于间冰期，其中北半球粉尘通量主要受控于冬季风强度，MIS4的粉尘量略高于MIS2，MIS1的粉尘量又高于MIS5；南半球粉尘通量总体与北半球类似，但MIS2显著高于MIS4，可能与粉尘源区的干湿变化有关。数据集存储为.xlsx格式，由4个数据文件组成，数据量为1.29 MB（压缩为1个文件）。该数据集旨在为理解当前气候变化归因、预测未来趋势和制定应对策略提供关键数据，助力气候模式模拟的科学发展。未来研究仍需深化对代用指标的物理意义解释，加强西风与冬季风的定量重建工作，增加研究空白区的相关数据。 |
| 关键词: 末次间冰期 西风 冬季风 粉尘通量 数据集成 古气候重建 |
| DOI：10.7515/JEE243006 |
| CSTR：32259.14.JEE243006 |
| 分类号: |
| 基金项目:崂山实验室科技创新项目（LSKJ202203300）；国家自然科学基金项目（42102238，42372220） |
| 英文基金项目:Science and Technology Innovation Project of Laoshan Laboratory (LSKJ202203300); National Natural Science Foundation of China (42102238, 42372220) |
|
| An integrated analysis of global westerly, winter monsoon, and dust f lux data over the last 130 ka |
|
LI Yue1, 2*, LI Yudong1, SONG Yougui1, 2
|
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
|
| Abstract: |
| The examination of climate dynamics during the last interglacial period is crucial for revealing the Earth’s climatic history and for forecasting future climate changes. With environmental conditions analogous to those of the Holocene, the last interglaciation serves as a pivotal benchmark for anticipating forthcoming climatic fluctuations. The westerly circulation and winter monsoon, as integral elements of the global climate system, exert a substantial impact on the Earth’s energy balance and the cycles of dust and carbon, which in turn have direct repercussions for human health and the stability of global ecosystems. Therefore, it is imperative to consider the interplay between the westerlies, winter monsoon, and dust cycles to fully understand the interaction mechanisms with global climate change. This paper compiles and provides a preliminary analysis of the long-term variations in global westerlies, winter monsoons, and dust fluxes since 130 ka, along with their implications for paleoclimate change. The results indicate that in the Northern Hemisphere, the westerlies over the Eurasian continent were more robust during interglacial, leading to a more humid climate, whereas they were relatively weaker during glacial. In North America, the westerlies migrated southward during glacial and retreated northward during interglacial, with a wetter climate under the influence of the westerlies. In the Southern Hemisphere, the New Zealand region experienced intensified westerlies during glacial, with a northward shift of the westerlies, resulting in enhanced moisture. The East Asian winter monsoon intensified during glacial, particularly peaking in strength during the Last Glacial Maximum (MIS2). The dust flux in the Northern Hemisphere was primarily governed by the intensity of the winter monsoon. The dust flux during MIS4 was marginally higher than that in MIS2, and that in MIS1 was greater than that in MIS5. In the Southern Hemisphere, the dust flux paralleled that of the Northern Hemisphere; however, it was significantly higher during MIS2 compared to MIS4, potentially linked to the alternations in dry and wet conditions in the dust source regions. The above-mentioned dataset is archived in .xlsx format, comprising four data files with a total data volume of 1.29 MB (compressed into a single file). This paper aims to furnish crucial data for deciphering the drivers of current climate change, forecasting future trajectories, and devising adaptive strategies, thereby enhancing the scientific progression of climate model simulations. Future research should delve deeper into the interpretation of proxy indicators’ physical significance, refine quantitative reconstructions of westerlies and winter monsoons, and broaden data collection in regions that are currently under-researched. |
| Key words: last interglaciation westerlies winter monsoon dust flux data integration paleoclimatic reconstruction |
