Transport of Microplastics in Marian Cove, West Antarctica
학위논문(석사) -- 서울대학교대학원 : 공과대학 건설환경공학부, 2021.8. 황진환. Microplastics with a size of less than 5 mm have been discovered in the Antarctic Ocean known as a pristine sea. The origins of microplastics are largely estimated to be both outside and inside Antarctica. According to the survey, more than half of t...
| Main Author: | |
|---|---|
| Other Authors: | , , |
| Format: | Doctoral or Postdoctoral Thesis |
| Language: | English |
| Published: |
서울대학교 대학원
2021
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10371/178726 https://dcollection.snu.ac.kr/common/orgView/000000167364 |
| Summary: | 학위논문(석사) -- 서울대학교대학원 : 공과대학 건설환경공학부, 2021.8. 황진환. Microplastics with a size of less than 5 mm have been discovered in the Antarctic Ocean known as a pristine sea. The origins of microplastics are largely estimated to be both outside and inside Antarctica. According to the survey, more than half of the scientific research stations residing in Antarctica do not have adequate sewage treatment systems, so it could be speculated that the wastewater has a regional effect on pollution in the Antarctic Ocean. Through the field survey, it was confirmed that microplastics were accumulated in Marian Cove where the King Sejong Station is located, and the concentration of microplastics in the wastewater was about 1000 times higher than that of the surrounding seawater. It is expected to be a major cause of microplastic pollution in seawater around the station. This study performed numerical modeling to elucidate the movement and accumulation mechanism of microplastics in the bay. When reproducing the flow around the station, the waves affecting the movement of microplastics were considered. The trajectories of the particles were then tracked according to waves, release time, and release location by using the Lagrangian Particle Tracking method that reflects the properties of microplastics. As a result of numerical simulation, the flow velocity of Marian Cove is slower than that of Maxwell Bay, and considering the wave effects, it has a significant effect on the surface flow, so it can affect the movement of particles floating on the surface layer. The lighter particles floated around the surface layer and could travel longer, so most of them could reach the shoreline, while the denser particles sank relatively quickly and accumulated on the seabed. In addition, the wave effect increases the traveling speed of particles twice comparing to the simulation cases without the wave. It is indicated that oceanographic processes such as waves are important factors in the transport of particles that float around the surface layer in ... |
|---|