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Intertropical Convergence Zone modulates Asian dust input to the low-latitude western Pacific during the late Neogene

文献类型：期刊论文

作者Zheng, Hao1,4,5; Jiang, Fuqing1,3,4,5; Yan, Yu4,5; Feng, Xuguang2; Xiong, Zhifang2,3; Jia, Qi2,3; Qin, Bingbin2,3; Ren, Chuanliang1,4,5; Xu, Zhaokai1,3,4,5; Li, Tiegang2,3
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2025-10-01
卷号675页码:10
关键词Asian dust Grain size Sr isotope Nd isotope Western Pacific Late Neogene
ISSN号0031-0182
DOI10.1016/j.palaeo.2025.113074
通讯作者Jiang, Fuqing(fqjiang@qdio.ac.cn) ; Xu, Zhaokai(zhaokaixu@qdio.ac.cn)
英文摘要Asian dust is one of the primary components of detrital sediment in the tropical western Pacific. Whether lowlatitude process influenced the Asian dust input to the low-latitude western Pacific during the late Neogene is still an open question. In this study, we analyzed the grain size composition of the detrital sediments and the radiogenic Sr and Nd isotopes of <4 um components in the International Ocean Discovery Program Site U1490 in the western Pacific warm pool. By using Weibull function fitting, we quantitatively separated fine-grained endmember components (EM2) from the detritus. The results indicate that EM2 primarily originated from dust of the northern Chinese deserts and western and central Chinese deserts, and is transported by the East Asian winter monsoon and westerlies during the late Neogene. The mode grain size of EM2 became significantly coarser at 7.2-4.8 Ma and 3.9-2.6 Ma, most likely due to the enhancement of the atmospheric circulation. The significant increase in EM2 content at 7.2-4.8 Ma and 3.9-2.6 Ma is temporally consistent with the records of Asian aridity and the southward shifts of the Intertropical Convergence Zone (ITCZ). We argue that the deposition of Asian dust in the low-latitude Pacific was influenced not only by the climate (e.g. atmospheric circulation and aridity) of Asian continent, but also was modulated by the paleolocation of the ITCZ. As the major rainfall zone in the low-latitude Pacific, ITCZ influenced the diffusion and deposition of Asian dust. During the late Neogene, the southward shift of the ITCZ forced Asian dust to spread southward and resulted in more Asian dust deposition in the low-latitude western Pacific. Our study demonstrates the important role of low-latitude process on the deposition of Asian dust in the western Pacific during the late Neogene.
WOS关键词CENOZOIC AEOLIAN SEQUENCES ; GRAIN-SIZE DISTRIBUTION ; PARECE VELA BASIN ; NORTH PACIFIC ; PHILIPPINE SEA ; EOLIAN DUST ; NEW-GUINEA ; RADIOGENIC SR ; ND ; EVOLUTION
资助项目Laoshan Laboratory[LSKJ202204201] ; National Natural Science Foundation of China[42076049] ; National Natural Science Foundation of China[42376050] ; National Natural Science Foundation of China[41830539] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; Taishan Scholars Project Funding[ts20190963] ; Taishan Scholars Project Funding[TSQN202211265]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:001509000100002
出版者ELSEVIER
源URL[http://ir.qdio.ac.cn/handle/337002/202286]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Jiang, Fuqing; Xu, Zhaokai
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Geol & Metallogeny, Qingdao 266061, Peoples R China
3.Qingdao Marine Sci & Technol Ctr, Lab Marine Geol, Qingdao 266237, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Zheng, Hao,Jiang, Fuqing,Yan, Yu,et al. Intertropical Convergence Zone modulates Asian dust input to the low-latitude western Pacific during the late Neogene[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2025,675:10.
APA Zheng, Hao.,Jiang, Fuqing.,Yan, Yu.,Feng, Xuguang.,Xiong, Zhifang.,...&Li, Tiegang.(2025).Intertropical Convergence Zone modulates Asian dust input to the low-latitude western Pacific during the late Neogene.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,675,10.
MLA Zheng, Hao,et al."Intertropical Convergence Zone modulates Asian dust input to the low-latitude western Pacific during the late Neogene".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 675(2025):10.

入库方式： OAI收割

来源：海洋研究所

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