DOI: 10.1016/j.quascirev.2017.02.019
Scopus记录号: 2-s2.0-85013835983
论文题名: Dry lake beds as sources of dust in Australia during the Late Quaternary: A volumetric approach based on lake bed and deflated dune volumes
作者: Farebrother W. ; Hesse P.P. ; Chang H.-C. ; Jones C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 161 起始页码: 81
结束页码: 98
语种: 英语
英文关键词: Aeolian
; DEM
; Dust
; Quaternary
; South Pacific
Scopus关键词: Earth (planet)
; Lakes
; Aeolian
; Geomorphic controls
; Last glacial cycles
; Quaternary
; Source-bordering dunes
; South Pacific
; South-eastern Australia
; Volumetric approach
; Dust
; deflation
; digital elevation model
; dune
; dust
; eolian deposit
; ephemeral lake
; GIS
; lacustrine deposit
; particle size
; Quaternary
; Shuttle Radar Topography Mission
; surface area
; volume
; Australia
; Lake Eyre
; Pacific Ocean
; Pacific Ocean (South)
; South Australia
英文摘要: Dust affects Earth's climate, ecology and economies across a broad range of scales, both temporally and spatially, and is an integral part of the earth's climate system. Previous studies have highlighted the importance of inland lake beds to dust emissions both locally and globally. This study aims to explore the relative volumetric importance of ephemeral lakes that emit dust to the Australian southeastern dust path over the last glacial cycle. SRTM DEMs and GIS analyses of long-term (up to 80 ka) lake-bed deflation volumes and deposition of sand-sized sediment onto downwind source bordering dunes were used to derive estimates of transported dust mass. A strong power relationship was found between lake area and the mass of deflated lake bed sediments. Total dust masses for the largest 53 lakes in southeastern Australia were derived using the relationship between lake area and dust mass and used to determine an upper value for total dust mass deflated from lake beds in southeastern Australia. Ephemeral lake-derived dust was found to represent at most 13% of the dust derived from southeastern Australia deposited in the southern Pacific over the last 80 ka or 22% over the last 40 ka. Lake Eyre (the largest lake) has contributed at most 3% of the Australian southeast dust plume. These results imply that there are significant additional sources of dust in Australia over these timescales, such as floodplains or dunefields, and that modelling must allow for diverse climatic and geomorphic controls on dust production. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59281
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Environmental Sciences, Macquarie University, Sydney, NSW, Australia; Department of Earth and Planetary Sciences, University of California, Berkeley, CA, United States
Recommended Citation:
Farebrother W.,Hesse P.P.,Chang H.-C.,et al. Dry lake beds as sources of dust in Australia during the Late Quaternary: A volumetric approach based on lake bed and deflated dune volumes[J]. Quaternary Science Reviews,2017-01-01,161