Study on behavior of hypoxia in the Upper Gulf of Thailand associated with river discharge variation

2016 Fiscal Year Final Research Report

• Project/Area Number: 26302001
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Environmental dynamic analysis
• Research Institution: Ehime University (2015-2016); Nagoya University (2014)
• Principal Investigator: Morimoto Akihiko 愛媛大学, 沿岸環境科学研究センター, 教授 (80301323)
• Co-Investigator(Kenkyū-buntansha): 郭 新宇 愛媛大学, 沿岸環境科学研究センター, 教授 (10322273) ; 三野 義尚 名古屋大学, 宇宙地球環境研究所, 助教 (20362303) ; 兼田 淳史 福井県立大学, 海洋生物資源学部, 准教授 (70304649)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 貧酸素水塊 / 北部タイランド湾

Outline of Final Research Achievements

We have carried out field observation in the Upper Gulf of Thailand (UGoT) throughout the year in order to understand current state of hypoxia and its seasonal variation. From the observational result, it is found that hypoxia occurs in the northern part of the UGoT from June to November and hypoxic area moves from eastern part of the UGoT to western part. We have developed a physical numerical model and a physical-ecosystem coupled model for understanding the variation in physical field and hypoxia associated with variation in river discharge. It is found from the physical model that current field does not change if river discharge is changed. On the other hand, it is suggested from the physical-ecosystem coupled model that hypoxic area were increased when river discharge was increased.

Free Research Field

沿岸海洋学