Seasonal variations of ocean acidification in Korean coastal waters
Master Since the beginning of the Industrial Revolution, large quantity of CO2 has been emitted into the atmosphere, mainly as a result of the burning of fossil fuels, cement production and extensive land use change. Around two-thirds of these emissions have remained in the atmosphere with its conce...
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| Format: | Thesis |
| Language: | English |
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포항공과대학교
2017
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| Online Access: | http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002329864 https://oasis.postech.ac.kr/handle/2014.oak/93854 |
| Summary: | Master Since the beginning of the Industrial Revolution, large quantity of CO2 has been emitted into the atmosphere, mainly as a result of the burning of fossil fuels, cement production and extensive land use change. Around two-thirds of these emissions have remained in the atmosphere with its concentration increasing from around 280ppm in 1800 to 400ppm in 2016. Remaining a third of these emissions appears to be absorbed by the ocean, indicating the oceanic sink as the major regulator of the atmospheric CO2. However, the absorption of excessive atmospheric CO2 by the oceans is leading to severe consequences on ocean biogeochemistry both regionally in coastal waters and globally in open oceans. The most prominent consequence is the ocean acidification which has caused the average surface ocean pH to decrease by 0.1 units relative to the preindustrial values (pH 8.1) and is predicted to change patterns of biogenic carbonate formation and may have further impacts on other ocean biogeochemical cycles. In coastal regions, the additional inputs of freshwater from rivers combined with the high-magnitude and high-frequency of natural variability as well as anthropogenic chemical perturbations further complicates our understanding of variations in ocean in space and time. However, a long-term oceanographic data is lacking in marginal seas including Korea to provide sufficient information on changes of ocean acidification. Therefore, it is important to extend our understanding of coastal waters through careful investigations to detect and attribute trends in ocean acidification and thus further evaluate the resulting implications for coastal marine ecosystems. This paper is structured in the following two parts. Chapter 2 is the study of impact of borate alkalinity on calculation of ocean acidification parameters in coastal waters of Korea and Iceland and Chapter 3 presents the study of seasonal variations of ocean acidification in Korean coastal waters. The first study investigated for any discrepancies in boron (B) ... |
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