讲座报告 Seminar
Luncheon Seminar #150: Why is there a major (~1,000 km long) mud belt system on the inner shelf along the energetic Zhi-Min Coast?  

【时间 Time】:2019-7-1 (星期一) 11:40am-1:00pm Seminar starts at 12:00pm    【浏览次数 Count】:300   【发布时间 Updated】:2019-6-25
【地点 Venue】:周隆泉楼A3-206   A3-206 Zhou Long Quan Building
【主讲人 Speaker】:刘祖乾,特聘教授    James T. Liu
【来访单位 Institution】:台湾中山大学,台湾     
【邀请人 Host】:简星  Xing Jian      【联络人 Contact】:黄迎   Ying Huang 2181571

Abstract

Globally mud areas on continental shelves are sinks from the dispersal of fluvial-sourced sediments. This talk addresses a fundamental issue in sediment dynamics focusing on how mud is retained on the seabed on shallow inner shelves. Through a process-based comprehensive study that integrates dynamics, provenance, and sedimentology, we show that the key mechanism to keep mud on the seabed is the water-column stratification that forms vertical and lateral dynamic barriers that restrict the upward mixing and seaward transport of suspended sediments. We studied the 1000 km-long mud belt that extends from the mouth of the Changjiang (Yangtze) River along the coast of Zhejiang and Fujian Provinces of China and ends on the west coast of Taiwan. This mud belt system is dynamically attached to the fluvial sources, of which the Changjiang River is the primary one. Winter is the constructive phase when active deposition takes place of fine-grained sediment carried mainly by the Changjiang plume driven by Zhe-Min Coastal Currents southwestward along the coast.

 

Bio

Employment

Postdoctoral Investigator, Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Massachusetts, USA (1988-1989)
Postdoctoral Fellow, Harbor Branch Oceanographic Institution, Florida, USA (1989-1991)
Research Scientist II, Florida Institute of Technology, Florida, USA (1991-1993)
Associate Professor, Institute of Marine Geology and Chemistry, National Sun Yat-sen University, Kaohsiung (1994-1998)
Professor, Department of Oceanography (formerly Institute of Marine Geology and Chemistry), National Sun Yat-sen University, Kaohsiung (1998-present)

Research Interest and expertise

Coastal geology, coastal and estuarine sediment dynamics, coastal change, submarine canyon oceanography, marine hyperpycnal flow and sedimentation

Honor

Award for Research Excellence, Taiwan Ministry of Science of Technology