DOI: 10.1029/2019WR026302
论文题名: Using Hydrological-Biogeochemical Linkages to Elucidate Carbon Dynamics in Coastal Marshes Subject to Relative Sea Level Rise
作者: Guimond J.A. ; Yu X. ; Seyfferth A.L. ; Michael H.A.
刊名: Water Resources Research
ISSN: 431397
出版年: 2020
卷: 56, 期: 2 语种: 英语
英文关键词: carbon budgets
; coastal wetlands
; estuaries
; groundwater modeling
; groundwater-surface water interaction
; sea level rise
Scopus关键词: Biogeochemistry
; Budget control
; Carbon
; Climate models
; Coastal zones
; Ecology
; Estuaries
; Groundwater
; Groundwater geochemistry
; Hydrology
; Sea level
; Water levels
; Wetlands
; Carbon budgets
; Coastal wetlands
; Ground water-surface water interactions
; Groundwater modeling
; Sea level rise
; Surface waters
; bioaccumulation
; biogeochemistry
; carbon budget
; coastal wetland
; estuarine environment
; groundwater-surface water interaction
; hydrological modeling
; sea level change
; upland region
; water level
; water table
; Delaware
; United States
英文摘要: Coastal marshes are an important component of the global carbon cycle, yet our understanding of how these ecosystems will respond to sea level rise (SLR) is limited. Coastal marsh hydrology varies based on elevation, distance from channel, and hydraulic properties, resulting in zones of unique water level oscillation patterns. These zones impact ecology and geochemistry and correspond to differences in carbon accumulation rates. These physical-biogeochemical linkages enable use of a hydrological model to predict changes in marsh zonation, and in turn carbon accumulation, as well as groundwater-surface water exchange under SLR. Here, we developed a calibrated hydrological model of a Delaware coastal marsh using HydroGeoSphere. We simulated three scenarios each of SLR, sediment accretion, and upland hydrologic response, and we quantified changes in the spatial coverage of different hydrologic zonations and groundwater-surface water exchange. Results show that relative SLR reduces marsh area, carbon burial, and lateral water fluxes. However, the magnitudes of change are linked to the terrestrial groundwater table response as well as relative SLR. In scenarios where the upland water table does not change with SLR, the magnitude of decline in marsh area and carbon accumulation is reduced compared to scenarios where the upland water table keeps pace with SLR. In contrast, the reduction in lateral water flux is minimized in scenarios with an upland water table rise equal to SLR compared to scenarios where the upland water table is held at present-day levels. This study highlights the importance of regional hydrologic setting in the fate of coastal marsh dynamics. ©2020. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159727
Appears in Collections: 气候变化与战略
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作者单位: Department of Geological Sciences, University of Delaware, Newark, DE, United States; School of Civil Engineering, Sun Yat-sen University, Guangzhou, China; Department of Plant and Soil Sciences, University of Delaware, Newark, DE, United States; Department of Civil and Environmental Engineering, University of Delaware, Newark, DE, United States
Recommended Citation:
Guimond J.A.,Yu X.,Seyfferth A.L.,et al. Using Hydrological-Biogeochemical Linkages to Elucidate Carbon Dynamics in Coastal Marshes Subject to Relative Sea Level Rise[J]. Water Resources Research,2020-01-01,56(2)