The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1002/jqs.3493 http://hdl.handle.net/11449/246656 |
Resumo: | Reconstruction of mass accumulation rates (MARs) in loess deposits are widely used for interpreting long-term aeolian transport and climate dynamics in terrestrial environments. However, these interpretations are often driven by a preponderance of reconstructions from individual or selected sites, which can bias our understanding of past climate, especially in the absence of other proxy information. Recent studies on MARs from multiple loess sites in Arid Central Asia (ACA) reveal disparities in the timing of peaks in accumulation between sites, as well as asynchronies with loess flux in the Chinese Loess Plateau (CLP). We investigate this issue by (1) dating five new sites from the western Ili Basin, therefore extending the spatial cover of loess chronologies across ACA and (2) combining that with MARs from >30 sites across ACA and the CLP over the last 60 ka. Our results indicate spatio-temporal inhomogeneity in the timing and rate of loess deposition across the ACA, and highlight the importance of interrogating local and regional influences on dust supply and transport. Our synthesis of MARs from ACA and the CLP suggests that the timing of peak dust flux as an indicator of large-scale climate dynamics is best derived from an aggregate of sites; this removes site-specific bias where local processes or topographic settings outweigh the climate signature. |
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The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regionsCentral AsiaChinese Loess Plateauloessluminescence datingmass accumulation ratesReconstruction of mass accumulation rates (MARs) in loess deposits are widely used for interpreting long-term aeolian transport and climate dynamics in terrestrial environments. However, these interpretations are often driven by a preponderance of reconstructions from individual or selected sites, which can bias our understanding of past climate, especially in the absence of other proxy information. Recent studies on MARs from multiple loess sites in Arid Central Asia (ACA) reveal disparities in the timing of peaks in accumulation between sites, as well as asynchronies with loess flux in the Chinese Loess Plateau (CLP). We investigate this issue by (1) dating five new sites from the western Ili Basin, therefore extending the spatial cover of loess chronologies across ACA and (2) combining that with MARs from >30 sites across ACA and the CLP over the last 60 ka. Our results indicate spatio-temporal inhomogeneity in the timing and rate of loess deposition across the ACA, and highlight the importance of interrogating local and regional influences on dust supply and transport. Our synthesis of MARs from ACA and the CLP suggests that the timing of peak dust flux as an indicator of large-scale climate dynamics is best derived from an aggregate of sites; this removes site-specific bias where local processes or topographic settings outweigh the climate signature.Research Group for Terrestrial Palaeoclimates Max Planck Institute for ChemistryDepartment of Geosciences University of Tübingen, Schnarrenbergstrasse 94-96Institute of Geology Czech Academy of SciencesNuclear Physics Institute of the Czech Academy of Sciences CRL Radiocarbon Laboratory, Na Truhlářce 39/64Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista (UNESP)Institute of Geological Sciences K. Satpaeva Ministry for Education and Science of the Republic of KazakhstanInstituto de Geociências e Ciências Exatas Universidade Estadual Paulista (UNESP)Max Planck Institute for ChemistryUniversity of TübingenCzech Academy of SciencesCRL Radiocarbon LaboratoryUniversidade Estadual Paulista (UNESP)Ministry for Education and Science of the Republic of KazakhstanDave, Aditi K.Lisá, LenkaScardia, Giancarlo [UNESP]Nigmatova, SaidaFitzsimmons, Kathryn E.2023-07-29T12:46:55Z2023-07-29T12:46:55Z2023-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article526-543http://dx.doi.org/10.1002/jqs.3493Journal of Quaternary Science, v. 38, n. 4, p. 526-543, 2023.1099-14170267-8179http://hdl.handle.net/11449/24665610.1002/jqs.34932-s2.0-85146338652Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Quaternary Scienceinfo:eu-repo/semantics/openAccess2023-07-29T12:46:55Zoai:repositorio.unesp.br:11449/246656Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:51:06.673078Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions |
title |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions |
spellingShingle |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions Dave, Aditi K. Central Asia Chinese Loess Plateau loess luminescence dating mass accumulation rates |
title_short |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions |
title_full |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions |
title_fullStr |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions |
title_full_unstemmed |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions |
title_sort |
The patchwork loess of Central Asia: Implications for interpreting aeolian dynamics and past climate circulation in piedmont regions |
author |
Dave, Aditi K. |
author_facet |
Dave, Aditi K. Lisá, Lenka Scardia, Giancarlo [UNESP] Nigmatova, Saida Fitzsimmons, Kathryn E. |
author_role |
author |
author2 |
Lisá, Lenka Scardia, Giancarlo [UNESP] Nigmatova, Saida Fitzsimmons, Kathryn E. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Max Planck Institute for Chemistry University of Tübingen Czech Academy of Sciences CRL Radiocarbon Laboratory Universidade Estadual Paulista (UNESP) Ministry for Education and Science of the Republic of Kazakhstan |
dc.contributor.author.fl_str_mv |
Dave, Aditi K. Lisá, Lenka Scardia, Giancarlo [UNESP] Nigmatova, Saida Fitzsimmons, Kathryn E. |
dc.subject.por.fl_str_mv |
Central Asia Chinese Loess Plateau loess luminescence dating mass accumulation rates |
topic |
Central Asia Chinese Loess Plateau loess luminescence dating mass accumulation rates |
description |
Reconstruction of mass accumulation rates (MARs) in loess deposits are widely used for interpreting long-term aeolian transport and climate dynamics in terrestrial environments. However, these interpretations are often driven by a preponderance of reconstructions from individual or selected sites, which can bias our understanding of past climate, especially in the absence of other proxy information. Recent studies on MARs from multiple loess sites in Arid Central Asia (ACA) reveal disparities in the timing of peaks in accumulation between sites, as well as asynchronies with loess flux in the Chinese Loess Plateau (CLP). We investigate this issue by (1) dating five new sites from the western Ili Basin, therefore extending the spatial cover of loess chronologies across ACA and (2) combining that with MARs from >30 sites across ACA and the CLP over the last 60 ka. Our results indicate spatio-temporal inhomogeneity in the timing and rate of loess deposition across the ACA, and highlight the importance of interrogating local and regional influences on dust supply and transport. Our synthesis of MARs from ACA and the CLP suggests that the timing of peak dust flux as an indicator of large-scale climate dynamics is best derived from an aggregate of sites; this removes site-specific bias where local processes or topographic settings outweigh the climate signature. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-07-29T12:46:55Z 2023-07-29T12:46:55Z 2023-05-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1002/jqs.3493 Journal of Quaternary Science, v. 38, n. 4, p. 526-543, 2023. 1099-1417 0267-8179 http://hdl.handle.net/11449/246656 10.1002/jqs.3493 2-s2.0-85146338652 |
url |
http://dx.doi.org/10.1002/jqs.3493 http://hdl.handle.net/11449/246656 |
identifier_str_mv |
Journal of Quaternary Science, v. 38, n. 4, p. 526-543, 2023. 1099-1417 0267-8179 10.1002/jqs.3493 2-s2.0-85146338652 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Quaternary Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
526-543 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129467943485440 |