DOI: 10.1029/2018JC013855
Scopus记录号: 2-s2.0-85050791218
论文题名: Role of Baroclinic Processes on Flushing Characteristics in a Highly Stratified Estuarine System, Mobile Bay, Alabama
作者: Du J. ; Park K. ; Shen J. ; Dzwonkowski B. ; Yu X. ; Yoon B.I.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 7 起始页码: 4518
结束页码: 4537
语种: 英语
英文关键词: baroclinic processes
; flushing
; freshwater age
; Mobile Bay
; numerical model
英文摘要: Flushing of an estuary quantifies the overall water exchange between the estuary and coastal ocean and is crucially important for water quality as well as biological and geochemical processes within the system. Flushing times and freshwater age in Mobile Bay were numerically calculated under realistic and various controlled forcing conditions. Their responses to external forcing were explained by the three-dimensional characteristics of general circulation in the system. The flushing time ranges from 10 to 33 days under the 25th–75th percentile river discharges, nearly half of the previous estimates based on barotropic processes only, suggesting the important contribution of baroclinic processes. Their influence, quantified as the “new ocean influx,” is on the same order of the river discharge under low to moderate river discharge conditions. The baroclinic influence increases and then decreases with increasing river discharge, aligning with the response of horizontal density gradient. By enhancing the net influx from the ocean mainly through density-driven circulation, baroclinic processes contribute to reduce flushing times. The three-dimensional circulation, which differs greatly between the wet and dry seasons, explains the temporal and spatial variations of the flushing characteristics. Wind forcing influences the three-dimensional circulation in the system with easterly and northerly winds tending to reduce the flushing time, while southerly and westerly winds the opposite. ©2018. 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/113556
Appears in Collections: 气候减缓与适应
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作者单位: Department of Marine Sciences, Texas A&M University, Galveston, TX, United States; Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, VA, United States; Department of Marine Sciences, University of South Alabama, Dauphin Island, AL, United States; Department of Ocean Sciences, College of Natural Science, Inha University, Incheon, South Korea
Recommended Citation:
Du J.,Park K.,Shen J.,et al. Role of Baroclinic Processes on Flushing Characteristics in a Highly Stratified Estuarine System, Mobile Bay, Alabama[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(7)