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
Year: 2024
Type: article
Abstract: 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.
DOI: 10.1029/2023pa004805
Institutions: The University of Tokyo, Australian National University, Japan Agency for Marine-Earth Science and Technology, Akita University, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Mount Fuji Research Institute, Yamanashi Prefectural Government, University of Liège, Institute of Natural Sciences, Geological Survey of Belgium, Ghent University
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Climate action
Open Access status: hybrid
Estimated APC paid: $3,880
Awards: Monsoon variability and Holocene sea level in the Nankai Region, A study on rapid climate and low latitude atmosphere and ocean coupling., Production rates of cosmogenic nuclides: Evaluation of geomagnetic field models to explore a potential chronological conversion method, Understanding ice sheets dynamics and climate changes(Fostering Joint International Research), Study to investigate the Holocene Temperature Conundrum
OpenAlex ID: W4402440313