Orbital Controls on North Pacific Dust Flux During the Late Quaternary

Zhong, Yi1; Liu, Yanguang2; Yang, Hu3,4; Yin, Qiuzhen5; Wilson, David J.6; Lu, Zhengyao7; Jaccard, Samuel L.8; Struve, Torben9; Clift, Peter D.6,10; Kaboth-Bahr, Stefanie11; Larrasoana, Juan C.12,13,14; Bahr, Andre15; Gong, Xun16,17,18; Zhao, Debo19; Zhang, Yanan1; Xia, Wenyue1; Liu, Qingsong1,20,21

2024-02-28

10.1029/2023GL106631

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

["Airborne mineral dust is sensitive to climatic changes, but its response to orbital forcing is still not fully understood. Here, we present a reconstruction of dust input to the Subarctic Pacific Ocean covering the past 190 kyr. The dust composition record is indicative of source moisture conditions, which were dominated by precessional variations. In contrast, the dust flux record is dominated by obliquity variations and displays an out-of-phase relationship with a dust record from the mid-latitude North Pacific Ocean. Climate model simulations suggest precession likely drove changes in the aridity and extent of dust source regions. Additionally, the obliquity variations in dust flux can be explained by meridional shifts in the North Pacific westerly jet, driven by changes in the meridional atmospheric temperature gradient. Overall, our findings suggest that North Pacific dust input was primarily modulated by orbital-controlled source aridity and the strength and position of the westerly winds.","Glacial-interglacial climate variations can affect dust transport to the ocean, but the controls on past dust fluxes to the North Pacific Ocean remain poorly constrained. This region is important because fertilization of phytoplankton growth by dust-borne iron may have contributed to lower glacial atmospheric CO2, and dust records could also constrain the past dynamics of the North Pacific westerly winds. Here, we highlight the dominance of obliquity cycles in modulating latitudinal shifts of the westerly winds and, in turn, dust inputs. In contrast, precession regulates the aridity of the dust source regions, which determines both dust emission rates and composition. Such orbital-scale fluctuations in the dust flux could influence ocean-atmosphere interactions in the middle and high northern latitudes, with implications for global atmospheric circulation and ocean carbon storage.","Moisture availability in Asian dust source regions to the North Pacific Ocean were controlled by precession North Pacific dust flux reveals dominant obliquity variations, but is out-of-phase at different latitudes The westerlies in the Northern Hemisphere were primarily modulated by obliquity cycles in the late Pleistocene"]

SCI ; EI

英语

第一 ; 通讯

State Key Laboratory of Marine Geology, Tongji University["MGK202209","SSKP202101"] ; Shenzhen Science and Technology Program[KQTD20170810111725321] ; NERC independent research fellowship[NE/T011440/1] ; null[42274094] ; null[92158208] ; null[42176245] ; null[42261144739] ; null[41976065] ; null[42176066]

Geology

Geosciences, Multidisciplinary

WOS:001177318400025

AMER GEOPHYSICAL UNION

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Ctr Marine Magnetism CM2, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
2.Minist Nat Resources MNR, Inst Oceanog 1, Key Lab Marine Geol & Metallogeny, Qingdao, Peoples R China
3.Southern Marine Sci & Engn Guangdong Lab, Zhuhai, Peoples R China
4.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany
5.Catholic Univ Louvain, Earth & Life Inst, Earth & Climate Res Ctr, Louvain La Neuve, Belgium
6.UCL, Dept Earth Sci, London, England
7.Lund Univ, Dept Phys Geog & Ecosyst Sci, Lund, Sweden
8.Univ Lausanne, Inst Earth Sci, Lausanne, Switzerland
9.Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm ICBM, Marine Isotope Geochem, Oldenburg, Germany
10.Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA USA
11.Free Univ Berlin, Inst Geol Sci, Berlin, Germany
12.CSIC, IGME, Zaragoza, Spain
13.Univ Publ Navarra, Dept Sci, Pamplona, Spain
14.Univ Publ Navarra, Inst Adv Mat & Math INAMAT2, Pamplona, Spain
15.Heidelberg Univ, Inst Earth Sci, Heidelberg, Germany
16.China Univ Geosci, Inst Adv Marine Res, Guangzhou, Peoples R China
17.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Hubei Key Lab Marine Geol Resources, Wuhan, Peoples R China
18.Qilu Univ Technol, Shandong Acad Sci, Shandong Prov Key Lab Comp Networks, Jinan, Peoples R China
19.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
20.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou, Peoples R China
21.Shanghai Sheshan Natl Geophys Observ, Shanghai, Peoples R China

Zhong, Yi,Liu, Yanguang,Yang, Hu,et al. Orbital Controls on North Pacific Dust Flux During the Late Quaternary[J]. GEOPHYSICAL RESEARCH LETTERS,2024,51(4).

Zhong, Yi.,Liu, Yanguang.,Yang, Hu.,Yin, Qiuzhen.,Wilson, David J..,...&Liu, Qingsong.(2024).Orbital Controls on North Pacific Dust Flux During the Late Quaternary.GEOPHYSICAL RESEARCH LETTERS,51(4).

Zhong, Yi,et al."Orbital Controls on North Pacific Dust Flux During the Late Quaternary".GEOPHYSICAL RESEARCH LETTERS 51.4(2024).