Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years

Polymodal distributions and end-member modeling of grain-size in lacustrine sediments can reveal the changes in sedimentary processes, transportation mechanisms, and climatic changes. The temporal and spatial variation characteristics of grain-size were investigated in six sediment cores of the plat...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Xiaolei Wang, Hao Yang, Jessica Lora Kitch, Jinliang Liu, Bin Xue
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Lake Fuxian Grain-size ISM Hydrodynamic processes End-member Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/6477905bed534721b291798f9e972b00
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6477905bed534721b291798f9e972b00
record_format	dspace
spelling	oai:doaj.org-article:6477905bed534721b291798f9e972b002021-11-20T05:13:00ZGrain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years2590-056010.1016/j.jaesx.2021.100073https://doaj.org/article/6477905bed534721b291798f9e972b002021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S259005602100030Xhttps://doaj.org/toc/2590-0560Polymodal distributions and end-member modeling of grain-size in lacustrine sediments can reveal the changes in sedimentary processes, transportation mechanisms, and climatic changes. The temporal and spatial variation characteristics of grain-size were investigated in six sediment cores of the plateau deep-lake Fuxian, in southwest China, where the climate was driven by Indian Summer Monsoon (ISM). Results indicated that the size of the dominant grain-size exponentially decreased with the declining hydrodynamic condition towards the deep-water zones, with an exception of the maximum grain-size near the outlet of the lake. Measured grain-size distributions were classified into four end-members (EMs) with a basic end-member model algorithm (BasEMMA), of which could be linked to a distinct transport mechanism and source: EM1 (long-term suspended load from atmospheric dust) with the modal size of 0.3–11.2 µm, EM2 (off-shore suspended load from fine riverine input) with 7.9–14.2 µm, EM3 ((near-shore suspended load from coarse riverine input) with 15.9–31.7 µm, and EM4 (near-shore riverbed load from extremely coarse riverine input) with 35.6–70.9 µm, respectively. Temporal variation of EM2 + EM3 components of grain-size in Core F5 are responses to the changes in instrumentally recorded precipitation in Chengjiang (1961–2008) and ISM (1860–2006), which indicates that changes in river flow in response to changes in precipitation is the primary driver of clastic sediment deposition especially in the narrow section of the lake. Our findings indicate grain-size distribution and sediment compositions are significant tools for improving the understanding of the spatiotemporal heterogeneity in dry-humid transformation of ISM over the past 150 years.Xiaolei WangHao YangJessica Lora KitchJinliang LiuBin XueElsevierarticleLake FuxianGrain-sizeISMHydrodynamic processesEnd-memberGeologyQE1-996.5ENJournal of Asian Earth Sciences: X, Vol 6, Iss , Pp 100073- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Lake Fuxian Grain-size ISM Hydrodynamic processes End-member Geology QE1-996.5
spellingShingle	Lake Fuxian Grain-size ISM Hydrodynamic processes End-member Geology QE1-996.5 Xiaolei Wang Hao Yang Jessica Lora Kitch Jinliang Liu Bin Xue Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years
description	Polymodal distributions and end-member modeling of grain-size in lacustrine sediments can reveal the changes in sedimentary processes, transportation mechanisms, and climatic changes. The temporal and spatial variation characteristics of grain-size were investigated in six sediment cores of the plateau deep-lake Fuxian, in southwest China, where the climate was driven by Indian Summer Monsoon (ISM). Results indicated that the size of the dominant grain-size exponentially decreased with the declining hydrodynamic condition towards the deep-water zones, with an exception of the maximum grain-size near the outlet of the lake. Measured grain-size distributions were classified into four end-members (EMs) with a basic end-member model algorithm (BasEMMA), of which could be linked to a distinct transport mechanism and source: EM1 (long-term suspended load from atmospheric dust) with the modal size of 0.3–11.2 µm, EM2 (off-shore suspended load from fine riverine input) with 7.9–14.2 µm, EM3 ((near-shore suspended load from coarse riverine input) with 15.9–31.7 µm, and EM4 (near-shore riverbed load from extremely coarse riverine input) with 35.6–70.9 µm, respectively. Temporal variation of EM2 + EM3 components of grain-size in Core F5 are responses to the changes in instrumentally recorded precipitation in Chengjiang (1961–2008) and ISM (1860–2006), which indicates that changes in river flow in response to changes in precipitation is the primary driver of clastic sediment deposition especially in the narrow section of the lake. Our findings indicate grain-size distribution and sediment compositions are significant tools for improving the understanding of the spatiotemporal heterogeneity in dry-humid transformation of ISM over the past 150 years.
format	article
author	Xiaolei Wang Hao Yang Jessica Lora Kitch Jinliang Liu Bin Xue
author_facet	Xiaolei Wang Hao Yang Jessica Lora Kitch Jinliang Liu Bin Xue
author_sort	Xiaolei Wang
title	Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years
title_short	Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years
title_full	Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years
title_fullStr	Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years
title_full_unstemmed	Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years
title_sort	grain-size characteristics in lake fuxian sediments: implication for dry-humid transformation of indian summer monsoon over the past 150 years
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/6477905bed534721b291798f9e972b00
work_keys_str_mv	AT xiaoleiwang grainsizecharacteristicsinlakefuxiansedimentsimplicationfordryhumidtransformationofindiansummermonsoonoverthepast150years AT haoyang grainsizecharacteristicsinlakefuxiansedimentsimplicationfordryhumidtransformationofindiansummermonsoonoverthepast150years AT jessicalorakitch grainsizecharacteristicsinlakefuxiansedimentsimplicationfordryhumidtransformationofindiansummermonsoonoverthepast150years AT jinliangliu grainsizecharacteristicsinlakefuxiansedimentsimplicationfordryhumidtransformationofindiansummermonsoonoverthepast150years AT binxue grainsizecharacteristicsinlakefuxiansedimentsimplicationfordryhumidtransformationofindiansummermonsoonoverthepast150years
_version_	1718419544791318528

Grain-size characteristics in lake Fuxian sediments: Implication for dry-humid transformation of Indian summer monsoon over the past 150 years

Ejemplares similares