Characteristics of vertical exchange process in the Pearl River estuary
文献类型：期刊论文
| 作者 | Hong, Bo; Gong, Wenping; Peng, Shiqiu; Xie, Qiang; Wang, Dongxiao; Li, Haobo; Xu, Hongzhou |
| 刊名 | AQUATIC ECOSYSTEM HEALTH & MANAGEMENT
 |
| 出版日期 | 2016 |
| 卷号 | 19期号:3页码:286-295 |
| 关键词 | transport timescale estuary circulation stratification |
| 通讯作者 | Xu, HZ (reprint author), Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China. |
| 中文摘要 | Being an estuary with the occasional appearance of hypoxia, the Pearl River estuary was selected to investigate its vertical exchange process by a validated 3-D numerical model. The concept of vertical exchange time was used to quantify the vertical exchange process and was calculated by adding a conservative tracer to the hydrodynamic model. The results revealed vertical exchange time has significant seasonal variation modulated by seasonally changed external forcing, and has similar structure with spatial variation in salinity. During the wet season, remarkably long vertical exchange times (>50 days) occurred at the lower estuary under 10 m depth, which was coincident with the frequently reported hypoxic zone. The entire Pearl River estuary was occupied by water mass with a vertical exchange time of <5 days during the dry season, which indicated the estuary's health condition during this period. Further analyses revealed the seasonal trend of vertical exchange time was closely related with salinity stratification and river runoff in which the lowest vertical exchange times can be estimated by linear regressions in certain stages. Tide modulated these exchange times in different time scales. Spring tide better mixed the water column and thus facilitated the vertical exchange process compared with neap tide. As a result, minimum vertical exchange time during spring tide was about 10 days shorter than that during neap tide. Flood-ebb tide also modulated vertical exchange time in the Pearl River estuary. Vertical exchange time varies with the tide and reached minimum and maximum values during valley and high tides, respectively. |
| 学科主题 | Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/15575]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 推荐引用方式 GB/T 7714 | Hong, Bo,Gong, Wenping,Peng, Shiqiu,et al. Characteristics of vertical exchange process in the Pearl River estuary[J]. AQUATIC ECOSYSTEM HEALTH & MANAGEMENT,2016,19(3):286-295. |
| APA | Hong, Bo.,Gong, Wenping.,Peng, Shiqiu.,Xie, Qiang.,Wang, Dongxiao.,...&Xu, Hongzhou.(2016).Characteristics of vertical exchange process in the Pearl River estuary.AQUATIC ECOSYSTEM HEALTH & MANAGEMENT,19(3),286-295. |
| MLA | Hong, Bo,et al."Characteristics of vertical exchange process in the Pearl River estuary".AQUATIC ECOSYSTEM HEALTH & MANAGEMENT 19.3(2016):286-295. |
入库方式： OAI收割
来源：南海海洋研究所
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