申平教授獲邀分享泥石流災害風險演變和氣候變化影響，詳情如下:

日期: 2021.05.11 (Wednesday)
時間: 17:00 – 18:00
地點: N21 5樓展覽廳
語言: 英語

人物簡介 Introduction:
申平教授於香港科技大學獲土木工程博士學位，2019年起任澳大任教土木及環境工程系任教。曾於香港科技大學擔任研究助理及博士後。他的研究方向是雨致多災種模擬、沿海城市災害分析及災害監測與緩解。詳情: https://www.fst.um.edu.mo/people/pingshen/

Date:      25/04/2022 (MONDAY)
Time:     11:30AM – 12:15AM    
Venue:   E11 – G015

Instructors/Speakers

Prof. Chunhua QIU
Associate Professor
School of Marine Sciences
Sun Yat-sen University
China

Abstract

Mesoscale eddies with spatial resolution of 50-300 km and temporal scales of several weeks carry more than 80% of global ocean kinetic energy，therefore, they are very important in ocean modeling. South China Sea is fulfilled with mesoscale eddies. We reviewed the observation skills of mesoscale eddies first. Then the deformation of mesoscale eddy was investigated by using observational network. We defined a vortex-deformation index to forecast the deformation trend of mesoscale eddy, and found the baroclinic instability is the main mechanism of eddy deformation. By using MITgcm model, we found the eddy advection induced an extreme surface cooling after Tropical cyclone “Bailu”.

Biography

Chunhua Qiu is an Associate Professor in School of Marine Sciences, Sun Yat-sen University. Her interest is in observing and modeling mesoscale-small scale dynamic processes in South China Sea. Her research is mainly supported by the project of National Natural Science Foundation of China, The National High Technology Research and Development Program of China, and so on. She publishes more than 30 papers and 1 book of Marine Meteorology. She is the reviewer of Journal of Geophysical Research-Oceans, Frontiers in Marine Science, International Journal of Climate, and so on.

Date:      25/04/2022 (MONDAY)
Time:     10:00AM – 11:30AM    
Venue:   E11 – G015

Instructors/Speakers

Prof. Dongxiao WANG
Dean and Professor
School of Marine Sciences
Sun Yat-sen University
China

Abstract

South China Sea (SCS) is one of the crucial oceanic channels connecting Pacific Ocean and Indian Ocean. It develops a complicated circulation, and heat and salt variability of SCS could have significant influences on regional climate. This topic will introduce (1) Interannual variation of circulation in the SCS. The intensity of eastward and northward branch of the summer SCS Western Boundary Current (WBC) along the coast of Vietnam showed negative correlation on interannual scale. This variation is mainly affected by the SCS Summer Monsoon and the flux of Luzon Strait. (2) Subsurface layer warming event in the SCS. Extreme warming events had happened many times in subsurface layer, SCSWBC plays a decisive role in generating and maintaining those extreme warming events. (3) Long-term trend of subsurface salinity in the SCS. Subsurface salinity in the northern SCS had a significant low-frequency variability during the past few decades: it decreased in the 1960s, then turned to increase from 1975, and decreased again after 1993. This decadal variation is determined by the combined effects of seawater intrusion through Luzon Strait and regional deep seawater upwelling process.

Future progresses may extend in fields below: (1) Mechanism of multi-scale (especially the mesoscale and submesoscale) interaction of the SCS main current system and its influence on the variation of main current system. (2) Mechanism of the SCS deep circulation variability and its relationship with energy in the upper and middle circulation. (3) Pattern and variability of the SCS middle circulation and its dynamical relationship with the upper and middle circulation.

Biography

Professor Dongxiao Wang is the dean of School of Marine Sciences in Sun Yat-sen University. He is also the deputy director of air-sea interaction committee, Chinese Society for Oceanography, the committee members of CNC-WCRP, SIMSEA, and CLIVAR/IOC‐GOOS (2017-2021). His interest is in the research of tropical ocean circulation dynamics and air-sea interaction. He got awards of National natural sciences award of China (the 2nd) (First Author). He is the chief scientist for National Basic Research Program of China (973 Program), National Science Fund for Distinguished Young Scholars, and so on. He has published more than 300 papers, and two books named Climatological atlas of physical oceanography in the upper South China Sea, Ocean circulation variation and air-sea interaction in the tropical Pacific Ocean.

申平教授獲邀分享泥石流災害風險演變和氣候變化影響，詳情如下:

日期: 2021.05.11 (Wednesday)
時間: 17:00 – 18:00
地點: N21 5樓展覽廳
語言: 英語

人物簡介 Introduction:
申平教授於香港科技大學獲土木工程博士學位，2019年起任澳大任教土木及環境工程系任教。曾於香港科技大學擔任研究助理及博士後。他的研究方向是雨致多災種模擬、沿海城市災害分析及災害監測與緩解。詳情: https://www.fst.um.edu.mo/people/pingshen/

Date:      25/04/2022 (MONDAY)
Time:     11:30AM – 12:15AM    
Venue:   E11 – G015

Instructors/Speakers

Prof. Chunhua QIU
Associate Professor
School of Marine Sciences
Sun Yat-sen University
China

Abstract

Mesoscale eddies with spatial resolution of 50-300 km and temporal scales of several weeks carry more than 80% of global ocean kinetic energy，therefore, they are very important in ocean modeling. South China Sea is fulfilled with mesoscale eddies. We reviewed the observation skills of mesoscale eddies first. Then the deformation of mesoscale eddy was investigated by using observational network. We defined a vortex-deformation index to forecast the deformation trend of mesoscale eddy, and found the baroclinic instability is the main mechanism of eddy deformation. By using MITgcm model, we found the eddy advection induced an extreme surface cooling after Tropical cyclone “Bailu”.

Biography

Chunhua Qiu is an Associate Professor in School of Marine Sciences, Sun Yat-sen University. Her interest is in observing and modeling mesoscale-small scale dynamic processes in South China Sea. Her research is mainly supported by the project of National Natural Science Foundation of China, The National High Technology Research and Development Program of China, and so on. She publishes more than 30 papers and 1 book of Marine Meteorology. She is the reviewer of Journal of Geophysical Research-Oceans, Frontiers in Marine Science, International Journal of Climate, and so on.

Date:      25/04/2022 (MONDAY)
Time:     10:00AM – 11:30AM    
Venue:   E11 – G015

Instructors/Speakers

Prof. Dongxiao WANG
Dean and Professor
School of Marine Sciences
Sun Yat-sen University
China

Abstract

South China Sea (SCS) is one of the crucial oceanic channels connecting Pacific Ocean and Indian Ocean. It develops a complicated circulation, and heat and salt variability of SCS could have significant influences on regional climate. This topic will introduce (1) Interannual variation of circulation in the SCS. The intensity of eastward and northward branch of the summer SCS Western Boundary Current (WBC) along the coast of Vietnam showed negative correlation on interannual scale. This variation is mainly affected by the SCS Summer Monsoon and the flux of Luzon Strait. (2) Subsurface layer warming event in the SCS. Extreme warming events had happened many times in subsurface layer, SCSWBC plays a decisive role in generating and maintaining those extreme warming events. (3) Long-term trend of subsurface salinity in the SCS. Subsurface salinity in the northern SCS had a significant low-frequency variability during the past few decades: it decreased in the 1960s, then turned to increase from 1975, and decreased again after 1993. This decadal variation is determined by the combined effects of seawater intrusion through Luzon Strait and regional deep seawater upwelling process.

Future progresses may extend in fields below: (1) Mechanism of multi-scale (especially the mesoscale and submesoscale) interaction of the SCS main current system and its influence on the variation of main current system. (2) Mechanism of the SCS deep circulation variability and its relationship with energy in the upper and middle circulation. (3) Pattern and variability of the SCS middle circulation and its dynamical relationship with the upper and middle circulation.

Biography

Professor Dongxiao Wang is the dean of School of Marine Sciences in Sun Yat-sen University. He is also the deputy director of air-sea interaction committee, Chinese Society for Oceanography, the committee members of CNC-WCRP, SIMSEA, and CLIVAR/IOC‐GOOS (2017-2021). His interest is in the research of tropical ocean circulation dynamics and air-sea interaction. He got awards of National natural sciences award of China (the 2nd) (First Author). He is the chief scientist for National Basic Research Program of China (973 Program), National Science Fund for Distinguished Young Scholars, and so on. He has published more than 300 papers, and two books named Climatological atlas of physical oceanography in the upper South China Sea, Ocean circulation variation and air-sea interaction in the tropical Pacific Ocean.