南海北部湾表层悬浮体分布规律

李珏; 乔璐璐; LeDucCuong; 薛文静; 杨宏达; 王勇智; 姚志刚

doi:10.16562/j.cnki.0256-1492.2019021301

南海北部湾表层悬浮体分布规律

1.
中国海洋大学海洋地球科学学院，青岛 266100

2.
海底科学与探测技术教育部重点实验室，青岛 266100

3.
越南科学院海洋环境与资源研究所，海防 180000

4.
自然资源部第一海洋研究所，青岛 266061

5.
物理海洋教育部重点实验室，青岛 266100

基金项目: 国家自然科学基金“浙闽沿岸泥质带冬季悬浮体的沉积机制”（41476030），“黄海暖流的沉积动力机制研究”（40906025）；中国东盟海上合作基金“长江三角洲与红河三角洲全新世沉积演化对比研究”；泰山学者建设工程专项项目；国家重点研发计划“大型水库调控下河口沉积动力过程及其生物地球化学效应”（2016YFA060093）

详细信息

作者简介: 李珏（1997—），女，硕士研究生，主要从事沉积动力学研究，E-mail：lijue1019@163.com

中图分类号: P736.21

收稿日期: 2019-02-13

修回日期: 2019-08-28

刊出日期: 2020-04-25

Surficial distribution of suspended sediment in Beibu Gulf of the South China Sea

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China

2.
Key Lab of Submarine Sciences & Prospecting Techniques, MOE, Ocean University of China, Qingdao 266100, China

3.
Institute Of Marine Environment and Resource, Haiphong 180000, Vietnam

4.
First Institute of Oceanography, MNR., Qingdao 266061, China

5.
Key Lab of Physical Oceanography, Ministry of Education, Qingdao 266100, China

Received Date: 13 February 2019

Revised Date: 28 August 2019

Publish Date: 25 April 2020

摘要

摘要:
受实测数据海域位置的限制，目前基于遥感手段对北部湾表层悬浮体的研究，在部分海域如海湾西部精度不高，且缺乏对悬浮体浓度（suspended sediment concentration，SSC）季节变化的研究。基于2003—2017年MODIS-Aqua卫星L1B数据，结合海南岛西部、广西沿岸和越南沿岸实测数据，建立表层SSC的反演模型，获得北部湾海域2003—2017年月均表层SSC分布，并对其影响因素进行初步探讨。结果显示：北部湾表层SSC存在3个终年高值区，包括广西沿岸、海南岛西侧和红河三角洲沿岸；受河流输沙和海洋动力季节变化影响，SSC表现为冬季和夏季较高、春季最低的季节变化特征；热带气旋过境导致北部湾海域SSC增高，其中热带风暴“贝碧嘉”过境时位于路径右侧的雷州半岛西部SSC较多年平均值增幅达75%。
- MODIS /
- 悬浮体 /
- 季节变化 /
- 北部湾
Abstract:
The study of surficial suspended matter based upon remote sensing is not accurate enough in Beibu Gulf, especially in the western part of the Gulf, due to location constraint. In addition, the data on seasonal variation in suspended sediment concentration (SSC) is lacking in the area. In this paper, a retrieval algorithm for surficial suspended sediment concentration was established by analyzing the images from the MODIS-Aqua satellite in the years from 2003-2017 and the in situ measured data from the Gulf, and thus the distribution of surficial SSC in Beibu Gulf is revealed and carefully studied. The results suggest that the main high-value areas of the surficial suspension are located along the coast of Guangxi, the west side of Hainan Island and the Red River Delta. Under the influence of fluvial sediment transport and ocean dynamics, SSC are higher in winter and summer rather than other seasons in the coastal areas, and reaches the lowest in spring. The transit of tropical cyclones will lead to the increase in SSC. SSC on the west side of Leizhou Peninsula increased by 75% compared with the multi-year average owing to the transit of tropical storm Bebinca.
- MODIS /
- suspended sediment /
- seasonal variations /
- Beibu Gulf

HTML全文

图 1 北部湾区域图

Figure 1.

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图 2 北部湾实测表层SSC与遥感反演结果对比图

Figure 2.

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图 3 北部湾2003—2017年年均表层悬浮体分布

Figure 3.

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图 4 北部湾2003—2017年多年平均各月SSC分布图

Figure 4.

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图 5 北部湾主要断面表层SSC（a，b，c，d）及北部湾区域平均风场（e）随时间变化

Figure 5.

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图 6 2013年6月北部湾表层悬浮体分布（a）及其与多年平均6月的差值（b）

Figure 6.

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图 7 2009年各月15日Balat河口含沙量及a点处多年月平均SSC分布

Figure 7.

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图 8 昌化江下游水体多年月平均含沙量^[25]及b站处多年月平均SSC分布

Figure 8.

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南海北部湾表层悬浮体分布规律

作者简介: 李珏（1997—），女，硕士研究生，主要从事沉积动力学研究，E-mail：lijue1019@163.com

Surficial distribution of suspended sediment in Beibu Gulf of the South China Sea

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