Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene

Feng，Xuguang1,2,5,9; Jiang，Fuqing2,3,4; Zhang，Zhaohui6; Xiong，Zhifang3,5; Zhong，Yi7; Dong，Jiang5; Chen，Tianyu8; Li，Anchun2; Zou，Xinqing1,9; Shi，Xuefa3,5

2022-06-15

10.1016/j.palaeo.2022.110963

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY   影响因子和分区

0031-0182

1872-616X

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 Niño-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 Niña-like (El Niño-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.

405-kyr cycles Asian dust Early Pleistocene ENSO-like state Western Pacific

SCI

英语

其他

National Natural Science Foundation of China[41576050];National Natural Science Foundation of China[41776065];National Natural Science Foundation of China[42076049];Chinese Academy of Sciences[MGE2020KG15];

Physical Geography ; Geology ; Paleontology

Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology

WOS:000802949300004

ELSEVIER

GEOSCIENCES

2-s2.0-85128223104

Scopus

1.Collaborative Innovation Center of South China Sea Studies,Nanjing University,Nanjing,210093,China
2.Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao,266071,China
3.Laboratory for Marine Geology,Qingdao National Laboratory for Marine Science and Technology,Qingdao,266237,China
4.Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao,266071,China
5.Key Laboratory of Marine Geology and Metallogeny,First Institute of Oceanography,Ministry of Natural Resources,Qingdao,266061,China
6.Institute of Marine Chemistry and Environment,Ocean College,Zhejiang University,Zhoushan,1 Zheda Road,316021,China
7.Centre for Marine Magnetism,Southern University of Science and Technology,Shenzhen,518055,China
8.State Key Laboratory for Mineral Deposit Research,School of Earth Sciences and Engineering,Nanjing University,Nanjing,210023,China
9.School of Geographic and Oceanographic Sciences,Ministry of Education Key Laboratory for Coast and Island Development,Nanjing University,Nanjing,210093,China

Feng，Xuguang,Jiang，Fuqing,Zhang，Zhaohui,et al. Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2022,596.

Feng，Xuguang.,Jiang，Fuqing.,Zhang，Zhaohui.,Xiong，Zhifang.,Zhong，Yi.,...&Shi，Xuefa.(2022).Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,596.

Feng，Xuguang,et al."Long eccentricity forcing Asian dust input into the northwestern Pacific during the early Pleistocene".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 596(2022).