Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 1342-937X |
EISSN | 1878-0571 |
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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