Article (Scientific journals)
A Lake at the Mt. Fuji (Lake Motosu) Recording Prolonged Negative Arctic Oscillation as Reduction of Aeolian Dust Due To Westerly Pathways During the Holocene
Nemoto, Karin; Yokoyama, Yusuke; Obrochta, Stephen P. et al.
2024In Paleoceanography and Paleoclimatology, 39 (9)
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Keywords :
Arctic Oscillation; dust; Holocene; paleoclimate; the westerlies; % reductions; Aeolian dusts; Dust emission; Dust transport; East Asia; Holocenes; Mt. Fuji; Paleoclimates; The westerly; Oceanography; Atmospheric Science; Paleontology
Abstract :
[en] East Asia is a major source of dust accounting for 20% of the global dust emission. Work on reconstructing past changes in dust transport in East Asia is complicated by difficulties in distinguishing local sedimentation from aerial material and lack of suitable material for age determination. Here, we address these issues and present a new dust proxy record from Lake Motosu, located on the Pacific side of Japan. The record is anchored by a high-quality tephra and radiocarbon chronology. Because Lake Motosu is situated in a quartz-free basaltic volcanic province, all quartz deposited in the lake is likely to be aerially sourced, and variations in quartz content should reflect past changes in dust transport. Our new record detects a low dust deposition event from 3.0 to 2.0 ka. This event corresponds to elevated sea surface temperature in the Sea of Japan and climate conditions similar to a negative phase of the Arctic Oscillation, indicating an association with the weakened Westerlies and with less frequent dust storms in the source region. The increase in spatial resolution of past dust transport reconstructions will further improve our understanding of the mechanism related to dust emission from East Asia.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Nemoto, Karin ;  Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Tokyo, Japan ; Department of Earth and Planetary Sciences, Graduate School of Science, The University of Tokyo, Hongo, Tokyo, Japan
Yokoyama, Yusuke ;  Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Tokyo, Japan ; Department of Earth and Planetary Sciences, Graduate School of Science, The University of Tokyo, Hongo, Tokyo, Japan ; Graduate Program on Environmental Sciences, The University of Tokyo, Komaba, Tokyo, Japan ; Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan ; Research School of Physics, The Australian National University, Canberra, Australia
Obrochta, Stephen P. ;  Graduate School of International Resource Science, Akita University, Akita, Japan
Miyairi, Yosuke;  Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Tokyo, Japan
Fujiwara, Osamu ;  Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
Yamamoto, Shinya ;  Mount Fuji Research Institute, Yamanashi Prefectural Government, Fujiyoshida, Japan
Nakamura, Atsunori ;  Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
Hubert, Aurelia  ;  Université de Liège - ULiège > Département de géographie > Géomorphologie et Géologie du Quaternaire
Heyvaert, Vanessa;  OD Earth and History of Life, Royal Belgian Institute of Natural Sciences, Geological Survey of Belgium, Brussels, Belgium
De Batist, Marc ;  Ghent University Department of Geology, Ghent, Belgium
Language :
English
Title :
A Lake at the Mt. Fuji (Lake Motosu) Recording Prolonged Negative Arctic Oscillation as Reduction of Aeolian Dust Due To Westerly Pathways During the Holocene
Publication date :
September 2024
Journal title :
Paleoceanography and Paleoclimatology
ISSN :
2572-4517
eISSN :
2572-4525
Publisher :
John Wiley and Sons Inc
Volume :
39
Issue :
9
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
JSPS - Japan Society for the Promotion of Science
BELSPO - Belgian Federal Science Policy Office
Funding text :
This work is part of the \u201CQuakeRecNankai\u201D project, funded by the Belgian Science Policy Office. Additional funding by JSPS Kakenhi 16K05571, 17H01168, 23KK0013, and 15KK0151, as well as the University of Tokyo Atmosphere and Ocean Research Institute program for visiting researchers. We also express our gratitude to two anonymous reviewers for their constructive comments that improved the quality of this manuscript.
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