气候变化领域集成服务门户(CCPortal): Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta

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DOI	10.1016/j.jmarsys.2023.103961
	Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta
	Wu, Xuefeng; He, Qing; Shen, Jian; Peng, Zhong; Guo, Leicheng; Xie, Weiming; Lin, Jianliang
发表日期	2024
ISSN	0924-7963
EISSN	1879-1573
起始页码	243
卷号	243
英文摘要	Global climate change is altering the frequency and intensity of extreme weather events such as typhoons and cold fronts, and this is inducing physical changes and adaptions in estuaries and coasts. We conducted a field campaign on the subaqueous Changjiang Delta front in September 2019 to improve understanding of storm impact on short-term hydro-morphodynamics. Over an 11 -day period, during which both typhoon and cold front events occurred, in -situ data including flow velocities, suspended sediment concentrations (SSC), and bed -level changes were acquired using bottom tripod and buoyage systems, Significant wave height reached 5.0 m during the typhoon, and the depth -averaged current velocity increased to 1.7 m/s. The net near -bottom sediment flux was in the same direction as the wind and was 5.5 times of that under calm weather. During the cold -front, significant wave height reached 2.5 m, and the near -bottom SSC increased to 7.0 kg/m(3). Bed -level changes were small (<2 cm) under pre -storm weather, while net deposition and erosion reached 15.8 cm and 16.8 cm, respectively, during the typhoon. Short-term changes in the sediment source -to -sink regime were detected in the subaqueous Changjiang Delta. The cold front enhances seaward sediment flushing from the delta towards the sea, while the typhoon drives sediment transport from the subaqueous delta towards Hangzhou Bay. We also observed rapid bed -level recovery following these extreme events. These findings improve our understanding of sediment transport under stormy conditions.
英文关键词	Changjiang Delta; Hydrodynamics; Morphodynamics; Storm; Sedimentary process
语种	英语
WOS研究方向	Geology ; Marine & Freshwater Biology ; Oceanography
WOS类目	Geosciences, Multidisciplinary ; Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:001162401000001
来源期刊	JOURNAL OF MARINE SYSTEMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299609
作者单位	East China Normal University; William & Mary; Virginia Institute of Marine Science; Sun Yat Sen University
推荐引用方式 GB/T 7714	Wu, Xuefeng,He, Qing,Shen, Jian,et al. Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta[J],2024,243.
APA	Wu, Xuefeng.,He, Qing.,Shen, Jian.,Peng, Zhong.,Guo, Leicheng.,...&Lin, Jianliang.(2024).Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta.JOURNAL OF MARINE SYSTEMS,243.
MLA	Wu, Xuefeng,et al."Different effects between cold front and tropical cyclone on short-term morphodynamics in the Changjiang Delta".JOURNAL OF MARINE SYSTEMS 243(2024).