DOI: 10.1038/NGEO3044
论文题名: Carbon storage in the Mississippi River delta enhanced by environmental engineering
作者: Shields M.R. ; Bianchi T.S. ; Mohrig D. ; Hutchings J.A. ; Kenney W.F. ; Kolker A.S. ; Curtis J.H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 11 起始页码: 846
结束页码: 851
语种: 英语
Scopus关键词: accretion
; burial (geology)
; carbon cycle
; carbon sequestration
; coastal zone
; Earth
; environmental effect
; environmental restoration
; mangrove
; sea level change
; sediment core
; sedimentation
; subsidence
; Atchafalaya Delta
; Louisiana
; Mississippi River
; United States
; Wax Lake Delta
英文摘要: River deltas have contributed to atmospheric carbon regulation throughout Earth history, but functioning in the modern era has been impaired by reduced sediment loads, altered hydrologic regimes, increased global sea-level rise and accelerated subsidence. Delta restoration involves environmental engineering via river diversions, which utilize self-organizing processes to create prograding deltas. Here we analyse sediment cores from Wax Lake delta, a product of environmental engineering, to quantify the burial of organic carbon. We find that, despite relatively low concentrations of organic carbon measured in the cores (about 0.4%), the accumulation of about 3 T m-2 of sediment over the approximate 60 years of delta building resulted in the burial of a significant amount of organic carbon (16 kg m-2). This equates to an apparent organic carbon accumulation rate of 250 ± 23 g m-2 yr-1, which implicitly includes losses by carbon emissions and erosion. Our estimated accumulation rate for Wax Lake delta is substantially greater than previous estimates based on the top metre of delta sediments and comparable to those of coastal mangrove and marsh habitats. The sedimentation of carbon at the Wax Lake delta demonstrates the capacity of engineered river diversions to enhance both coastal accretion and carbon burial. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105676
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Geological Sciences, University of Florida, Gainesville, FL, United States; Jackson School of Geosciences, University of Texas, Austin, TX, United States; Land Use and Environmental Change Institute, University of Florida, Gainesville, FL, United States; Louisiana Universities Marine Consortium, 8124 Highway 56, Chauvin, LA, United States; Department of Earth and Environmental Sciences, Tulane University, New Orleans, LA, United States
Recommended Citation:
Shields M.R.,Bianchi T.S.,Mohrig D.,et al. Carbon storage in the Mississippi River delta enhanced by environmental engineering[J]. Nature Geoscience,2017-01-01,10(11)