globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1914140117
论文题名:
Depth-dependent soil mixing persists across climate zones
作者: Gray H.J.; Keen-Zebert A.; Furbish D.J.; Tucker G.E.; Mahan S.A.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:16
起始页码: 8750
结束页码: 8756
语种: 英语
英文关键词: Luminescence ; OSL ; Pedoturbation ; Sediment tracing ; Soil mixing
Scopus关键词: Article ; climate ; controlled study ; ecology ; environmental factor ; geology ; luminescence ; priority journal ; sediment ; soil analysis ; soil and soil related phenomena ; soil mixing
英文摘要: Soil mixing over long (>102 y) timescales enhances nutrient fluxes that support soil ecology, contributes to dispersion of sediment and contaminated material, and modulates fluxes of carbon through Earth’s largest terrestrial carbon reservoir. Despite its foundational importance, we lack robust understanding of the rates and patterns of soil mixing, largely due to a lack of long-timescale data. Here we demonstrate that luminescence, a light-sensitive property of minerals used for geologic dating, can be used as a long-timescale sediment tracer in soils to reveal the structure of soil mixing. We develop a probabilistic model of transport and mixing of tracer particles and associated luminescence in soils and compare with a global compilation of luminescence versus depth in various locations. The model–data comparison reveals that soil mixing rate varies over the soil depth, with this depth dependency persisting across climate and ecological zones. The depth dependency is consistent with a model in which mixing intensity decreases linearly or exponentially with depth, although our data do not resolve between these cases. Our findings support the long-suspected idea that depth-dependent mixing is a spatially and temporally persistent feature of soils. Evidence for a climate control on the patterns and intensities of soil mixing with depth remains elusive and requires the further study of soil mixing processes. © 2020 National Academy of Sciences. All rights reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164232
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Gray, H.J., Luminescence Geochronology Laboratory, US Geological Survey, Denver, CO 80225, United States; Keen-Zebert, A., Division of Earth and Ecosystem Sciences, Desert Research Institute, Reno, NV 89512, United States; Furbish, D.J., Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37235, United States, Department of Civil and Environmental Engineering, Vanderbilt University, Nashville, TN 37325, United States; Tucker, G.E., Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado–Boulder, Boulder, CO 80309, United States, Department of Geological Sciences, University of Colorado–Boulder, Boulder, CO 80309, United States; Mahan, S.A., Luminescence Geochronology Laboratory, US Geological Survey, Denver, CO 80225, United States

Recommended Citation:
Gray H.J.,Keen-Zebert A.,Furbish D.J.,et al. Depth-dependent soil mixing persists across climate zones[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(16)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Gray H.J.]'s Articles
[Keen-Zebert A.]'s Articles
[Furbish D.J.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Gray H.J.]'s Articles
[Keen-Zebert A.]'s Articles
[Furbish D.J.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Gray H.J.]‘s Articles
[Keen-Zebert A.]‘s Articles
[Furbish D.J.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.