globalchange  > 气候变化与战略
DOI: 10.1029/2019GB006376
论文题名:
Carbon Deposition and Burial in Estuarine Sediments of the Contiguous United States
作者: Hutchings J.A.; Bianchi T.S.; Najjar R.G.; Herrmann M.; Kemp W.M.; Hinson A.L.; Feagin R.A.
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2020
卷: 34, 期:2
语种: 英语
英文关键词: Burial ; Carbon Cycle ; Cluster Analysis ; Empirical Model ; Estuary ; Flux
Scopus关键词: bulk density ; burial (geology) ; carbon cycle ; cluster analysis ; deposition ; empirical analysis ; estuarine sediment ; flux measurement ; organic carbon ; sedimentation ; sedimentation rate ; transfer function ; United States
英文摘要: Estuaries represent the primary linkage between the terrestrial and marine carbon cycles, and estuarine processing of riverine and coastal carbon plays a disproportionately large role in the global carbon cycle relative to the small areal extent of the estuarine environments. However, knowledge of the rate of organic carbon deposition and burial in estuarine sediments is lacking at regional scales. Data on surficial total organic carbon, linear sedimentation, and bulk density of estuarine sediments were compiled and categorized via a cluster analysis in order to estimate carbon deposition within the contiguous United States (CONUS). The cluster analysis broadly grouped estuaries by geography, but exceptions to geographic clustering highlighted differences within regions. A transfer function from deposition to burial based on linear sedimentation rate was used to estimate burial efficiency, and thus the rate of carbon burial within each cluster. We estimate organic carbon deposition rates within CONUS estuarine sediments to be 161 [121–217, 95% confidence] g C/m2/yr with a burial efficiency estimated at 38 [34–42, 95% confidence] %, which yields a long-term burial rate of 64 [44–97, 95% confidence] g C/m2/yr. Spatially integrated organic deposition and burial rates are 11.3 [8.5–15.2, 95% confidence] and 4.5 [3.1–6.8, 95% confidence] Tg C/yr, respectively. Our findings allow a more thorough understanding of coastal carbon cycling, which is critical for both management purposes as well as for the assessment of the role of estuaries in past and future climate change. ©2020. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159937
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作者单位: Department of Geological Sciences, University of Florida, Gainesville, FL, United States; Now at Department of Earth and Planetary Sciences, Washington University, St. Louis, MO, United States; Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States; Horn Point Laboratory, University of Maryland Center for Environmental Science, Cambridge, MD, United States; Department of Microbiology, University of Tennessee, Knoxville, TN, United States; Department of Ecosystem Science and Management, Texas A&M University, College Station, TX, United States

Recommended Citation:
Hutchings J.A.,Bianchi T.S.,Najjar R.G.,et al. Carbon Deposition and Burial in Estuarine Sediments of the Contiguous United States[J]. Global Biogeochemical Cycles,2020-01-01,34(2)
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