Reconstructing atmospheric changes in Monsoon regions using eolian dust

Kinsley, Christopher W.

doi:10.1575/1912/24554

Cited by 1 publication

(22 citation statements)

References 83 publications

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“… North Pacific dust fluxes from ODP 1208. (a) Late Pleistocene‐Holocene dust fluxes determined using 232 Th total concentrations and 230 Th xs0 ‐derived sediment rain rates (Kinsley, 2019; Kinsley et al., 2022). Error bars represent all propagated uncertainties for both isotopes.…”

Section: Resultsmentioning

confidence: 99%

“…Our finding that glacial dust fluxes decreased and interglacial dust fluxes likely remained relatively stable at ODP 1208 from the early to late Quaternary is at odds with the limited other dust accumulation rates from the (Kinsley, 2019;Kinsley et al, 2022). Error bars represent all propagated uncertainties for both isotopes.…”

Section: A New Marine Perspective On Dust From Eastern Asiamentioning

confidence: 89%

“…The other possible terrigenous component present at ODP 1208 is volcanic material, which could complicate dust reconstructions. However, the application of multiple elemental and isotopic proxies for dust, along with previously published geochemical results, allows us to estimate the impact of volcanic detritus on 232 Th‐derived dust fluxes during the Plio‐Pleistocene (see Section 2 as well as Text S1 in Supporting Information ) (Abell et al., 2021; Kinsley, 2019; Kinsley et al., 2022; McGee et al., 2016; Serno et al., 2014; W. Zhang et al., 2016, 2020). Finally, while we have previously noted that 232 Th concentrations can also be impacted by changing dust sources and sediment grain size, the interquartile variability in 232 Th content across several East Asian dust sources in the grain size fraction expected to reach ODP 1208 cannot fully explain our average two‐fold decrease in glacial dust fluxes across the Quaternary (McGee et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

“…(a) Prob‐stack benthic oxygen isotope stack (Ahn et al., 2017). (b) High‐resolution Quaternary dust amplification factors from the North Pacific for ODP 1208 (based on 232 Th total dust fluxes) (Abell et al., 2021; Kinsley, 2019; Kinsley et al., 2022) and ODP 882 (Haug et al., 1995). (c) Low‐resolution Quaternary dust amplification factors from the North Pacific for ODP 1208 (W. Zhang et al., 2016), ODP 885 (Q. Zhang et al., 2020a), and ODP 885/886 (Rea et al., 1998).…”

Section: Discussionmentioning

confidence: 99%

“…First, we follow the same methodology of the original studies (Abell et al, 2021;Kinsley, 2019;Kinsley et al, 2022) and assume all 232 Th is derived from dust ( 232 Th total ). This assumption is supported by geochemical data presented in Zhang et al (2016), who suggest low Th concentrations in the non-dust lithogenic component of ODP 1208 sediments.…”

Section: Determination Of Dust Concentrationsmentioning

confidence: 99%

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Evaluating the Drivers of Quaternary Dust Fluxes to the Western North Pacific: East Asian Dustiness and Northern Hemisphere Gustiness

Abell,

Winckler,

Pullen

et al. 2023

Paleoceanog and Paleoclimatol

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Quantifying variability in, and identifying the mechanisms behind, East Asian dust production and transport across the last several million years is essential for constraining future dust emissions and deposition. Our current understanding of East Asian dust dynamics through the Quaternary is primarily limited to low‐resolution records from the North Pacific Ocean, those from the Chinese Loess Plateau, and paleoenvironmental reconstructions from arid basins. All are susceptible to sediment winnowing and focusing as well as input of poorly constrained or unidentified non‐dust detrital material. To avoid these limitations, we examine high‐resolution, constant flux proxy‐derived dust fluxes from the North Pacific and find evidence for higher glacial dust fluxes in the early Pleistocene compared to the late Pleistocene. Our results suggest decreasing dust transported to the mid‐latitude North Pacific Ocean from eastern Asia across the Pleistocene. This observation is ostensibly at odds with previous dust records from marine sediments and the Chinese Loess Plateau, and with the perception of higher East Asian dust production and transport during the late Pleistocene associated with the amplification of glaciations. We provide three possible scenarios to describe the ∼2700‐ky evolution of eastern Asia glacial dust dynamics, and discuss them in the context of sediment production, availability, and atmospheric circulation. Our data and proposed driving mechanisms not only raise questions about the framework typically used to interpret dust archives from East Asia and the North Pacific Ocean, but also provide a roadmap for hypothesis testing and future work necessary to produce better‐constrained records of paleo‐dust fluxes.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Section: A New Marine Perspective On Dust From Eastern Asiamentioning

confidence: 89%