Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene
Asian dust deposition in the northwestern Pacific is generally linked to high-latitude paleoclimate evolution during the Quaternary. However, whether low-latitude tropical Pacific processes, such as El Nino-Southern Oscillation (ENSO), influence Asian dust input into the northwestern Pacific remains...
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/179441 2023-05-15T16:41:15+02:00 Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene Feng, Xuguang Jiang, Fuqing Zhang, Zhaohui Xiong, Zhifang Zhong, Yi Dong, Jiang Chen, Tianyu Li, Anchun Zou, Xinqing Shi, Xuefa 2022-06-15 http://ir.qdio.ac.cn/handle/337002/179440 http://ir.qdio.ac.cn/handle/337002/179441 https://doi.org/10.1016/j.palaeo.2022.110963 英语 eng ELSEVIER PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://ir.qdio.ac.cn/handle/337002/179440 http://ir.qdio.ac.cn/handle/337002/179441 doi:10.1016/j.palaeo.2022.110963 Asian dust 405-kyr cycles ENSO-like state Western Pacific Early Pleistocene Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary 期刊论文 2022 ftchinacasciocas https://doi.org/10.1016/j.palaeo.2022.110963 2022-07-29T12:11:57Z Asian dust deposition in the northwestern Pacific is generally linked to high-latitude paleoclimate evolution during the Quaternary. However, whether low-latitude tropical Pacific processes, such as El Nino-Southern Oscillation (ENSO), influence Asian dust input into the northwestern Pacific remains uncertain. Here, we present clear periodic variations in potassium content (K (wt%)) and gamma-ray attenuation (GRA) bulk density, which are closely linked to the variations in Asian dust, in a sediment core recovered at Site U1438 in the Amami Sankaku Basin (ASB), northwestern Philippine Sea. Based on the shipboard age-depth model, we tuned the GRA to the mass accumulation rate curve on the Chinese Loess Plateau and the 8-kyr-lagged obliquity curve, and established the astronomical timescale. The K (wt%) content and GRA were higher during glacials and lower during interglacials, as driven by the variability in the Northern Hemisphere ice sheet (NHIS) during the Quaternary. In addition, strong long eccentricity 405-kyr cycles were observed in the dust records (K (wt%) content and GRA) during the early Pleistocene. The 405-kyr filter results showed that increased (decreased) Asian dust corresponded to the La Nina-like (El Nino-like) state, suggesting that Asian dust input into the northwestern Pacific was modulated by ENSO on 405-kyr cycles in the early Pleistocene. Our study illustrated the possible link between long eccentricity 405-kyr cycles in the Asian interior and low-latitude forcing, including potential modulation by ENSO. Report Ice Sheet Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Pacific Palaeogeography, Palaeoclimatology, Palaeoecology 596 110963 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Asian dust 405-kyr cycles ENSO-like state Western Pacific Early Pleistocene Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary |
spellingShingle |
Asian dust 405-kyr cycles ENSO-like state Western Pacific Early Pleistocene Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary Feng, Xuguang Jiang, Fuqing Zhang, Zhaohui Xiong, Zhifang Zhong, Yi Dong, Jiang Chen, Tianyu Li, Anchun Zou, Xinqing Shi, Xuefa Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene |
topic_facet |
Asian dust 405-kyr cycles ENSO-like state Western Pacific Early Pleistocene Physical Geography Geology Paleontology Geography Physical Geosciences Multidisciplinary |
description |
Asian dust deposition in the northwestern Pacific is generally linked to high-latitude paleoclimate evolution during the Quaternary. However, whether low-latitude tropical Pacific processes, such as El Nino-Southern Oscillation (ENSO), influence Asian dust input into the northwestern Pacific remains uncertain. Here, we present clear periodic variations in potassium content (K (wt%)) and gamma-ray attenuation (GRA) bulk density, which are closely linked to the variations in Asian dust, in a sediment core recovered at Site U1438 in the Amami Sankaku Basin (ASB), northwestern Philippine Sea. Based on the shipboard age-depth model, we tuned the GRA to the mass accumulation rate curve on the Chinese Loess Plateau and the 8-kyr-lagged obliquity curve, and established the astronomical timescale. The K (wt%) content and GRA were higher during glacials and lower during interglacials, as driven by the variability in the Northern Hemisphere ice sheet (NHIS) during the Quaternary. In addition, strong long eccentricity 405-kyr cycles were observed in the dust records (K (wt%) content and GRA) during the early Pleistocene. The 405-kyr filter results showed that increased (decreased) Asian dust corresponded to the La Nina-like (El Nino-like) state, suggesting that Asian dust input into the northwestern Pacific was modulated by ENSO on 405-kyr cycles in the early Pleistocene. Our study illustrated the possible link between long eccentricity 405-kyr cycles in the Asian interior and low-latitude forcing, including potential modulation by ENSO. |
format |
Report |
author |
Feng, Xuguang Jiang, Fuqing Zhang, Zhaohui Xiong, Zhifang Zhong, Yi Dong, Jiang Chen, Tianyu Li, Anchun Zou, Xinqing Shi, Xuefa |
author_facet |
Feng, Xuguang Jiang, Fuqing Zhang, Zhaohui Xiong, Zhifang Zhong, Yi Dong, Jiang Chen, Tianyu Li, Anchun Zou, Xinqing Shi, Xuefa |
author_sort |
Feng, Xuguang |
title |
Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene |
title_short |
Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene |
title_full |
Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene |
title_fullStr |
Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene |
title_full_unstemmed |
Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene |
title_sort |
long eccentricity forcing asian dust input into the northwestern pacific during the early pleistocene |
publisher |
ELSEVIER |
publishDate |
2022 |
url |
http://ir.qdio.ac.cn/handle/337002/179440 http://ir.qdio.ac.cn/handle/337002/179441 https://doi.org/10.1016/j.palaeo.2022.110963 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY http://ir.qdio.ac.cn/handle/337002/179440 http://ir.qdio.ac.cn/handle/337002/179441 doi:10.1016/j.palaeo.2022.110963 |
op_doi |
https://doi.org/10.1016/j.palaeo.2022.110963 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
596 |
container_start_page |
110963 |
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1766031687011008512 |