Northwestern Pacific tropical cyclone activity enhanced by increased Asian dust emissions during the Little Ice Age

Yang, Yang; Piper, David J. W.; Xu, Min; Gao, Jianhua; Jia, Jianjun; Normandeau, Alexandre; Chu, Dongdong; Zhou, Linfeng; Wang, Ya Ping; Gao, Shu

doi:10.1038/s41467-022-29386-2

Cited by 12 publications

(2 citation statements)

References 80 publications

(131 reference statements)

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“…In addition, we observe that the main phases of increased FC 32 1,15-diol proxy in core T06 coincide well with intervals of increased Asian dust emissions at 850-750 and 540-370 yr BP (Chen et al, 2020;Figures 4A, E). A marked increase in dust storm activity is related to an enhanced EAWM (Yang et al, 2022; Figures 4C, E). In conclusion, our study indicates that the EAWM and CDW are the main mechanisms controlling riverine OM input into the Yangtze River since the last 1000 years.…”

Section: Reconstructing the History Of Terrestrial Om Input Using The...mentioning

confidence: 90%

Evolutions of upwelling and terrestrial organic matter input in the inner shelf of the East China Sea in the last millennium revealed by long-chain alkyl diols proxies

et al. 2022

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Long-chain alkyl diols (LCDs) can be used as organic geochemical proxies for paleoceanographic change, especially in marginal sea areas where large volumes of sediments are deposited rapidly and continuously. However, little is known about the applicability and response on a millennium scale in relation with existing records in those sediments. We reconstruct changes in upwelling and terrestrial organic matter (OM) input in core sediments from the Zhejiang Fujian coastal station (T08) and Yangtze River Estuary station (T06) in the inner shelf of the East China Sea (ECS) over the last millennium, using the LCD based proxies: diol index 2 (DI-2), and FC321,15-diol. Our results show that DI-2 values ([(C28+C30)1,14-diols]/([(C28+C30)1,13-diols]+[(C28+C30)1,14-diols])) at T08 decrease significantly during 600–400 yr BP but increase gradually after 400 yr BP. The FC321,15-diol proxy ([C321,15-diol]×100/([(C28+C30)1,13-diols]+[(C30+C32)1,15-diols])) at T06 shows marked fluctuations during 1000–800 yr BP, followed by a significant decline during 800–500 yr BP but a subsequent increase from 500 to 300 yr BP. We find that variations in DI-2 values are broadly consistent with changes in the strength of the East Asian Summer Monsoon (EASM) and the Kuroshio Current and are likely linked to changes in the frequency and intensity of the El Niño-Southern Oscillation (ENSO). The increased strength of the EASM causes greater offshore movement of the upper layer of seawater, which in turn triggers upwelling of bottom waters formed by Kuroshio subsurface waters. We find that variations in FC321,15-diol proxy are controlled mainly by the East Asian Winter Monsoon (EAWM) and the Yangtze River discharge. By increasing the strength of the EAWM, southward transportation of material deposited in the estuary of the Yangtze River by the ECS coastal currents is promoted. In addition, we synthesize records of other organic geochemical indicators nearby core sediments in the ECS; these records emphasize the importance of reconstructing the evolutionary history of upwelling and subdividing the relative inputs of terrestrial OM. Our study provides a new means for reconstructing the evolution of upwelling and terrestrial OM input in the inner shelf of the ECS over the last millennium.

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Section: Reconstructing the History Of Terrestrial Om Input Using The...mentioning

confidence: 90%

Evolutions of upwelling and terrestrial organic matter input in the inner shelf of the East China Sea in the last millennium revealed by long-chain alkyl diols proxies

et al. 2022

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“…3B, bottom). Previous studies revealed a suppressing effect of aerosols on TC activities over the Atlantic Basin (20,37) but an enhancing effect over the Pacific (38), both assuming linear relationships between aerosols and low-frequency SST variability over the multiyear and large spatial scale. Our ML model revealed a nonlinear relationship between the DOD and the TCR at the individual TC level, signifying the importance of examining the TC-SST-DOD interactions in a sophisticate analyzing framework.…”

Section: Nonmonotonic Relationship Between Dust and Tcrmentioning

confidence: 96%

Leading role of Saharan dust on tropical cyclone rainfall in the Atlantic Basin

Zhu,

Wang,

Chavas

et al. 2024

Sci. Adv.

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Tropical cyclone rainfall (TCR) extensively affects coastal communities, primarily through inland flooding. The impact of global climate changes on TCR is complex and debatable. This study uses an XGBoost machine learning model with 19-year meteorological data and hourly satellite precipitation observations to predict TCR for individual storms. The model identifies dust optical depth (DOD) as a key predictor that enhances performance evidently. The model also uncovers a nonlinear and boomerang-shape relationship between Saharan dust and TCR, with a TCR peak at 0.06 DOD and a sharp decrease thereafter. This indicates a shift from microphysical enhancement to radiative suppression at high dust concentrations. The model also highlights meaningful correlations between TCR and meteorological factors like sea surface temperature and equivalent potential temperature near storm cores. These findings illustrate the effectiveness of machine learning in predicting TCR and understanding its driving factors and physical mechanisms.

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Aircraft observations of aerosol and BC during the East Asian dust storm event: Vertical profiles, size distribution and mixing state

Liu,

Zhao,

Niu

et al. 2024

Atmospheric Environment

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Northwestern Pacific tropical cyclone activity enhanced by increased Asian dust emissions during the Little Ice Age

Cited by 12 publications

References 80 publications

Evolutions of upwelling and terrestrial organic matter input in the inner shelf of the East China Sea in the last millennium revealed by long-chain alkyl diols proxies

Evolutions of upwelling and terrestrial organic matter input in the inner shelf of the East China Sea in the last millennium revealed by long-chain alkyl diols proxies

Leading role of Saharan dust on tropical cyclone rainfall in the Atlantic Basin

Aircraft observations of aerosol and BC during the East Asian dust storm event: Vertical profiles, size distribution and mixing state

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