PREDICTION OF LONG TERM CHANGES IN CHLOROPHYLL- A AND DISSOLVED OXYGEN CONCENTRATION DUE TO CLIMATE CHANGE IN THE YELLOW SEA
8/25/2011 2:46:00 PM
Chul-Hui Kwoun, Min-Sun Kwon, Nam-Do Lee, Hoon Kang
Land Ocean Environment Co.,Ltd, Korea
ABSTRACT
This study’s aim was to examine the changes in chlorophyll and DO Conc. caused by the rise of water temperature in the Yellow Sea, and to predict possible impacts the global warming would have on the ocean environment and ecosystem. Based on the results from the hydrodynamic model, the initial and boundary values, ground inflowing pollutant loads, sediment nutrient yield, and biological parameters of the elements that interact with chlorophyll were used to reproduce the current condition. Then taking into account the fact that for the past 10 years the temperature of seawater around Korea has risen approximately 0.75oC, the study predicted the changes in the concentration of chlorophyll-a & DO for the next 10 years, based on the hypothesis that the water temperature will rise linearly by 0.075oC every year. The results showed that the chlorophyll-a concentration detected in the Yellow Sea would increase by 0.55mg/L within the next 10years, representing an overall pattern of increase in the concentration levels. Meanwhile, almost no changes in the DO concentration was found at surface layer, the changes in DO concentration detected in the Yellow Sea would range from -1.68mg/L to +1.92mg/L in the middle layer.
Key Words : Yellow sea, Climate change, Sea surface temperature, Ecological model, Chlorophyll-a, Dissolved oxygen.
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