Back to Search
Start Over
Enhanced climate variability during the last millennium recorded in alkenone sea surface temperatures of the northwest Pacific margin
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
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.
- Subjects :
- Global and Planetary Change
Alkenone
geography
geography.geographical_feature_category
010504 meteorology & atmospheric sciences
010502 geochemistry & geophysics
Oceanography
01 natural sciences
East asia summer monsoon
Sea surface temperature
Volcano
13. Climate action
Climatology
East asian summer monsoon
Period (geology)
14. Life underwater
Geology
Pacific decadal oscillation
0105 earth and related environmental sciences
Temperature record
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....07daf111b6dfb55c173112cfd84bc601
- Full Text :
- https://doi.org/10.1016/j.gloplacha.2021.103558