fnctId=thesis,fnctNo=348
[2024] Long-term trends in dissolved oxygen and environmental parameters in Jinhae Bay, Korea: A 25-year analysis (1997?2021)
- 작성자
- 권희진
- 저자
- 이상헌
- 발행사항
- 발행일
- 2024/11
- 저널명
- OCEAN & COASTAL MANAGEMENT
- 국문초록
- 영문초록
- Jaehong Kim:공동(제1)-외부-대학원생-Florida St,이다빈:공동(참여)-외부-POST-DOC-한국해양과학기술원,김관우:공동(참여)-외부-POST-DOC-국립수산과학원,장효근:공동(참여)-외부-POST-DOC-국립수산과학원,Kwon, Jae Il:공동(참여)-외부-책임연구원-한국해양과학기술원,Choi, Jin Yong:공동(참여)-외부-책임연구원-한국해양과학기술원,Joo, Hui Tae:공동(참여)-외부-선임연구원-국립수산과학원,강재중:공동(참여)-외부-선임연구원-국립수산과학원,박상훈:공동(참여)-내부-대학원생-부산대학교,이상헌:공동(교신)-내부-교수-부산대학교
Abstract
In recent decades, global oceanic dissolved oxygen (DO) levels have been consistently declining, leading to a notable increase in hypoxic zones. However, comprehensive information on the current trends of DO in Jinhae Bay remains scarce. This study investigated the long-term variations in bottom dissolved oxygen (DO) in Jinhae Bay, specifically focusing on recurring occurrences of oxygen-deficient water (ODW) in August, coinciding with the lowest average DO levels with the most stratified water. ODW events predominantly manifested in the inner bay, while the outer bay exhibited fewer instances due to robust water exchange processes. Analysis of the Low DO group revealed higher surface temperature and salinity, indicating diminished oxygen solubility compared to the High DO group. Lower Chemical oxygen demand (COD) and chlorophyll-a (Chl-a) values in the Low DO group suggested enhanced bacterial decomposition and subdued photosynthesis, in contrast to the High DO group. Over the last 25 years, Jinhae Bay has experienced a discernible decline in bottom DO concentrations. Contrastingly, surface temperature has exhibited a consistent upward trend, notably accelerating in the last 12 years, indicating reduced oxygen solubility. Notably, a substantial reduction in bottom DO levels was observed in the outer bay, previously considered less susceptible to hypoxic conditions. Furthermore, a concurrent decrease in pH highlights the urgency for a comprehensive investigation encompassing both summer hypoxia and seawater acidification, crucial for protecting Jinhae Bay's ecosystem from further deterioration.
- 일반텍스트
- (RCMS) 쿠로시오 해류로 인한 한반도 해양위기 대응기술 개발
- 첨부파일