fnctId=thesis,fnctNo=348
[2022] Increased terrigenous input from North America to the northern Mendeleev Ridge (western Arctic Ocean) since the mid-Brunhes Event
- 작성자
- 김지수
- 저자
- 박광규, 김부근
- 발행사항
- 15189 (2022)
- 발행일
- 2022-09
- 저널명
- SCIENTIFIC REPORTS
- 국문초록
- 영문초록
- Park, K., Wang, R., Xiao, W., Polyak, L., Cho, H. G., & Khim, B. K.
Mid-Brunhes Event (MBE) occurred at approximately 420 ka between Marine Isotope Stage 11 and 12, and is considered the most pronounced climatic shift during the last?~?800 kyrs. On the other hand, it is unclear if the MBE was global, despite being observed in the high-latitude Northern Hemispheric cryosphere in terms of climate systems. A 5.35-m long gravity core ARC5-MA01 was obtained from the northern Mendeleev Ridge in the western Arctic Ocean to track the paleoenvironmental changes in terms of the terrigenous sedimentation in response to the glacial-interglacial climate changes across the MBE. Geochemical proxies (biogenic opal, total organic carbon, C/N ratio, carbon isotope of organic matter, and calcium carbonate) of MA01 suggest that the terrigenous input was generally higher during the interglacial periods. Based on a mineralogical examination, most of the terrigenous input was attributed to the abundance of dolomite and the increased kaolinite content from North America. In particular, most paleoceanographic proxies showed that the terrigenous input from North America was enhanced distinctly during the post-MBE interglacial periods. These results suggest that the MBE in the western Arctic Ocean was a global climatic shift closely linked to cryospheric development in North America during the middle Pleistocene.
- 일반텍스트
- 인도몬순에 의한 고생산성 변화와 빙하기-간빙기 해양탄소순환 복원
- 첨부파일