WESTPAC 9th International Scientific Symposium

WESTPAC 9th International Scientific Symposium

22-25 April 2014, Nha Trang, Vietnam


All sessions are open to all participants, and will focus around three main themes: (1) Understanding Ocean Processes in the Indo-Pacific Region; (2) Ensuring Marine Biodiversity, Food Safety and Security; and (3) Maintenance of Ocean Health.

Understanding Ocean Processes in the Indo-Pacific Region

● Role of the Indo-Pacific Ocean in regional climate change and variability

● Status, trends and effects of climate, natural disturbances and anthropogenic stressors on ocean ecosystems

● Risk/vulnerability assessment on coastal sea-level related hazards focusing on sea level rise, storm surges and coastal erosion

● Sediment source-to-sink process in the Western Pacific

Ensuring Marine Biodiversity, Food Safety and Security

● Status, trends of marine biodiversity and productivity (including marine endangered species, invasive species, etc.)

● Sustainable fisheries and aquaculture

● Toxic marine organisms and seafood safety

Maintenance of Ocean Health

● Changing ocean biogeochemistry and its ecosystem impact (particularly nutrient supply and cycles, hypoxia, POPs and heavy metals)

● Ocean acidification and its effects on marine ecosystems

● Harmful algal blooms

● Restoration and conservation of marine ecosystems

● Remote sensing in integrated coastal and marine management

Cross-cutting and Emerging Issues

● Development and demonstration of ocean forecasting system

● Technical and technological developments, and data management in coastal and open ocean observations

● Marine renewable energy

● Good practices in, and lessons learnt from capacity development for marine science and ocean governance

Moreover, one Senior Officials Forum is being planned in view of the importance of engaging governmental officials in charge of marine science, observation and capacity building.

Important Deadlines

  • 30 October 2013: Early registration
  • 30 November 2013: Abstract submission and financial support application
  • 31 December 2013: Notification of abstract acceptance and financial support grant
  • 15 January 2014: Confirmation of participation by paper presenters

Travel & Accommodation

More detailed information concerning travel and transportation can be found in the symposium website: www.vnio.org.vn/9thwestpacsymp.

Financial Support

Financial support will be available for a limited number of participants, especially for young scientists and students from developing countries in the WESTPAC region.

Contact Address

Local Secretariat for the WESTPAC 9th International Scientific Symposium

Mrs. Do Minh Thu

Institute of Oceanography

01 Cau Da, Nha Trang, Khanh Hoa, Vietnam

Tel: (84-58) 3590035

Fax: (84-58) 3590034

Email: dmthu.io@gmail.com


IOC Regional Office for the Western Pacific (WESTPAC Office)

Ms. Nachapa Saransuth

Intergovernmental Oceanographic Commission of UNESCO

Tel: +66 2 1411288

Fax: +66 2 1439245

Email: snachapa@gmail.com; n.saransuth@unesco.org


Keynote Addresses

● Achievements and perspectives of marine science in the region

● Climate change and variability and its related disasters in the region

● Climate and anthropogenic impacts to and resilience of ecosystems in the region

● Latest scientific advances and innovations in ocean observations techniques

● Impacts on the ocean and coasts following the 2011 Japan Tsunami

● Marine processes and resource management towards sustaining marine biodiversity and food security

more details, check HERE

Abnormal upwelling and chlorophyll-a concentration off South Vietnam in summer 2007

Liu, X., J. Wang, X. Cheng, and Y. Du (2012), Abnormal upwelling and chlorophyll-a concentration off South Vietnam in summer 2007, J. Geophys. Res., 117, C07021, doi:10.1029/2012JC008052.


The present study investigates a strong upwelling and concurrent phytoplankton bloom off the South Vietnam coast in August 2007. Analysis of the alongshore wind, offshore Ekman transport, wind stress curl and other parameters indicates the southwesterly summer monsoon plays an important role in this peculiar case. The change of monsoonal wind involves variations of atmospheric circulation on multiple time scales. On the interannual time scale, a positive Indian Ocean Dipole (IOD) in 2007 accompanying with a La Niña event acts to enhance the southwesterly monsoon over the South China Sea (SCS). The enhanced southwesterly wind is regarded as a major factor in promoting the upwelling and the phytoplankton bloom off the South Vietnam coast. On the intraseasonal time scale, variations of the sea surface temperature (SST) and sea surface wind at 30-60 day periods reveal that the SST cooling develops with the evolution of the southwesterly wind anomalies with nearly one week delay, implying the great significance of the Madden-Julian Oscillation (MJO). Moreover, a tropical storm formed in the western SCS in early August reinforces the westerly wind and SST cooling. Among multiple factors on different time scales, the MJO event is considered as the major cause, since it induces the maximum velocity (4 m/s) of the southwesterly wind anomalies. As a result, the high Chlorophyll-a concentration (>0.56 mg/m3) and low SST center (<27 {degree sign}C) develops in the region off the South Vietnam coast and advects to the central SCS, riding on the northern rim of the southern anticyclonic gyre.


  • Chlorophyll-a concentration
  • El Niño
  • Indian Ocean dipole
  • Madden-Julian Oscillation
  • South Vietnam coast
  • upwelling

Remote sensing oceanography of a harmful algal bloom (HAB) off the coast of southeastern Vietnam

DanLing TANG, H Kawamura, Hai Doan-Nhu, W Takahashi , 2004. Remote sensing oceanography of a harmful algal bloom (HAB) off the coast of southeastern Vietnam. J. of Geophysical Research (Ocean).Vol 109, doi:10.1029/2003JC002045, 2004.


Harmful algal blooms (HABs) in the southeastern Vietnamese coastal waters have caused large economic losses in aquacultured and wild fisheries in recent years; however, there have been few oceanographic studies on these HAB events. The present study reports an extensive HAB off southeastern Vietnamese waters during late June to July 2002 with in situ observations and analyzes the oceanographic conditions using satellite remote sensing data. The HAB had high chlorophyll a (Chl a) concentrations (up to 4.5 mg m−3) occurring ∼200 km off the coast and ∼200 km northeast of the Mekong River mouth for a period of ∼6 weeks. The bloom was dominated by the harmful algae haptophyte Phaeocystis cf. globosa and caused a very significant mortality of aquacultured fish and other marine life. In the same period, sea surface temperature (SST) imagery showed a cold water plume extending from the coast to the open sea, and QuikScat data showed strong southwesterly winds blowing parallel to the coastline. This study indicated that the HAB was induced and supported by offshore upwelling that brings nutrients from the deep ocean to the surface and from coastal water to offshore water and that the upwelling was driven by strong wind through Ekman transport when winds were parallel to the coastline. This study demonstrated the possibility of utilizing a combination of satellite data of Chl a, SST, and wind velocity together with coastal bathymetric information and in situ observations to give a better understanding of the biological oceanography of HABs.


  • harmful algal bloom (HAB);
  • satellite remote sensing;
  • upwelling;
  • SeaWiFS;
  • chlorophyll a;
  • South China Sea