Enhanced climate variability during the last millennium recorded in alkenone sea surface temperatures of the northwest Pacific margin
- Title
- Enhanced climate variability during the last millennium recorded in alkenone sea surface temperatures of the northwest Pacific margin
- Author
- 예상욱
- Keywords
- Last millennium; Common Era; Past sea surface temperature; Volcanic forcing; East Asian summer monsoon; North Pacific
- Issue Date
- 2021-09
- Publisher
- ELSEVIER
- Citation
- GLOBAL AND PLANETARY CHANGE, v. 204, Page. 1-17
- Abstract
- Previous studies on surface temperature reconstructions for the last 2000 years (2 k) revealed a long-term cooling
trend for the last millennium in comparison to the previous millennium. However, knowledge on the decadal- to
centennial-scale variability in sea surface temperature and the underlying governing mechanisms throughout the
period is limited. We reconstructed high-resolution continuous sea surface temperature changes over the last 2 k
in the northwest Pacific margin based on the alkenone unsaturation index. Our alkenone temperature record
revealed enhanced and more rapidly changing climate variability during the last millennium (approximately
1200–1850 Common Era) than during the previous millennium. Cold and hot extremes also occurred more
frequently during the last millennium. The enhanced and rapidly changing climate variability appears to be
associated with frequent volcanic eruptions and grand solar minima. The reconstructed surface temperature
variability tends to be associated with variations in the East Asia summer monsoon and the Pacific Decadal
Oscillation, implying that these variations are also enhanced in the last millennium than in the previous
millennium.
- URI
- https://www.sciencedirect.com/science/article/pii/S0921818121001430https://repository.hanyang.ac.kr/handle/20.500.11754/170591
- ISSN
- 0921-8181
- DOI
- 10.1016/j.gloplacha.2021.103558
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > MARINE SCIENCE AND CONVERGENCE ENGINEERING(해양융합공학과) > Articles
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