DOI: 10.1002/joc.5290
论文题名: The evolution and volcanic forcing of the southern annular mode during the past 300 years
作者: Yang J. ; Xiao C.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 4 起始页码: 1706
结束页码: 1717
语种: 英语
英文关键词: Antarctic
; ice core
; reconstruction
; southern annular mode
; volcanic forcing
Scopus关键词: Climatology
; Ice
; Image reconstruction
; Ozone layer
; Volcanoes
; Antarctic
; Climate variability
; Ice core
; Internal climate variability
; Southern Annular Mode
; Southern Hemisphere
; Stratospheric ozone depletion
; Volcanic forcing
; Climate change
; Antarctic Oscillation
; climate forcing
; climate variation
; geochemistry
; ice core
; paleoclimate
; proxy climate record
; Southern Hemisphere
; volcanic eruption
; Antarctica
英文摘要: A positive change in the southern annular mode (SAM), which is the primary pattern of climate variability in the Southern Hemisphere, has been induced predominantly by polar stratospheric ozone depletion. However, the lack of long-term observational records limits our understanding of the long-term SAM behaviour. In this study, we found that the geochemical record of the LGB69 ice core from the eastern coast of Antarctica was significantly correlated with the winter SAM index (SAMI). In addition, we developed an annual mean SAMI beginning in 1701 based on 15 annually resolved ice cores and relevant proxy–climate relationships. Our reconstruction accounted for 54.8% of the total variance from 1957 to 2000 (the calibration period). We demonstrate that the recent positive phase shift in the annual mean SAMI since the 1970s is unprecedented, with the estimate for the latest regime in the 1990s reaching values 2.5 times the standard deviation above the baseline (1701–2000). This peak value also coincides with the largest 30- and 50-year trends, which have occurred at the end of the 20th century. From the reconstructed SAMI, we also found that the response to large volcanic events was likely positive in the 3 years after the eruption, but this positive response can be masked by internal climate variability when a strong El Niño event occurs in the eruption year. © 2017 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117074
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; State Key Laboratory of Earth Surface and Source Ecology, Beijing Normal University, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Yang J.,Xiao C.. The evolution and volcanic forcing of the southern annular mode during the past 300 years[J]. International Journal of Climatology,2018-01-01,38(4)