Arid
DOI10.1016/j.gr.2015.10.002
Coal-derived rates of atmospheric dust deposition during the Permian
Marshall, Chris1; Large, David J.1; Heavens, Nicholas G.2
通讯作者Large, David J.
来源期刊GONDWANA RESEARCH
ISSN1342-937X
EISSN1878-0571
出版年2016
卷号31页码:20-29
英文摘要

Despite widespread evidence for atmospheric dust deposition prior to the Quaternary, quantitative rate data remains sparse. As dust influences both climate and biological productivity, the absence of quantitative dust data limits the comprehensiveness of models of pre-Quaternary climate and biogeochemical cycles. Here, we propose that inorganic matter contained in coal primarily records atmospheric dust deposition. To test this, we use the average concentration of inorganic matter in Permian coal to map global patterns and deposition rates of atmospheric dust over Pangea. The dust accumulation rate is calculated assuming Permian peat carbon accumulation rates in temperate climates were similar to Holocene rates and accounting for the loss of carbon during coalification. Coal-derived rates vary from 0.02 to 25 g m(-2) year(-1), values that fall within the present-day global range. A well-constrained East-West pattern of dust deposition corresponding to expected palaeoclimate gradients extends across Gondwana with maximum dust deposition rates occurring close to arid regions. A similar pattern is partially defined over the northern hemisphere. Patterns are consistent with the presence of two large global dust plumes centred on the tropics. The spatial patterns of dust deposition were also compared to dust cycle simulations for the Permian made with the Community Climate System Model version 3 (CCSM3). Key differences between the simulations and the coal data are the lack of evidence for an Antarctic dust source, higher than expected dust deposition over N and S China and greater dust deposition rates over Western Gondwana. This new coal-based dust accumulation rate data expands the pre-Neogene quantitative record of atmospheric dust and can help to inform and validate models of global circulation and biogeochemical cycles over the past 350 Myr. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.


英文关键词Permian Pangea Dust Coal Atmospheric deposition
类型Review
语种英语
国家England ; USA
收录类别SCI-E
WOS记录号WOS:000371555100002
WOS关键词MINERAL MATTER ; AFRICAN DUST ; CLIMATE ; RECORD ; BASIN ; SEA ; PANGAEA ; FACIES ; LOESS
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/193333
作者单位1.Univ Nottingham, Univ Pk, Nottingham NG7 2RD, England;
2.Hampton Univ, Hampton, VA 23669 USA
推荐引用方式
GB/T 7714
Marshall, Chris,Large, David J.,Heavens, Nicholas G.. Coal-derived rates of atmospheric dust deposition during the Permian[J],2016,31:20-29.
APA Marshall, Chris,Large, David J.,&Heavens, Nicholas G..(2016).Coal-derived rates of atmospheric dust deposition during the Permian.GONDWANA RESEARCH,31,20-29.
MLA Marshall, Chris,et al."Coal-derived rates of atmospheric dust deposition during the Permian".GONDWANA RESEARCH 31(2016):20-29.
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