| DOI: | 10.1016/j.gloplacha.2014.10.011
|
| 论文题名: | Mid-Burdigalian Paratethyan alkenone record reveals link between orbital forcing, Antarctic ice-sheet dynamics and European climate at the verge to Miocene Climate Optimum |
| 作者: | Grunert P.; Tzanova A.; Harzhauser M.; Piller W.E.
|
| ISSN: | 0921-8393
|
| 出版年: | 2014
|
| 卷: | 123, 期:PA | | 起始页码: | 36
|
| 结束页码: | 43
|
| 语种: | 英语
|
| 英文关键词: | Alkenones
; Burdigalian
; Early Ottnangian Cooling
; Orbital forcing
; Palaeoclimate
; Paratethys
|
| Scopus关键词: | Alkenones
; Burdigalian
; Orbital forcing
; Palaeoclimate
; Paratethys
; alkenone
; Burdigalian
; data set
; deep sea
; ice sheet
; magnitude
; paleoclimate
; paleogeography
; Antarctica
|
| 英文摘要: | The Early Ottnangian Cooling (EOC), a distinct cold-spell in European climate at ~. 18. Ma preceding the Miocene Climate Optimum, is frequently reported in Paratethys records; however, the duration, magnitude, and underlying causes are poorly understood. A new palaeoclimatic data-set provides unexpected insights into this event.UK'37-based sea-surface temperatures>24°C between ~18.1 and 17.7Myrs substantially exceed existing estimates, and indicate a significantly warmer European climate than previously assumed for this usually poorly recovered time interval. The EOC is expressed as an average drop of 2-3°C in Paratethyan water temperatures between ~18.1 and 17.8Myrs with two distinct cold snaps at ~17.86Ma and ~17.81Ma. The short duration of the EOC excludes Tethyan Seaway closure as its underlying cause, although the enhanced palaeoclimatic sensitivity of the Paratethys due to this palaeogeographic configuration potentially contributed to the magnitude of SST deterioration during the EOC. The revealed palaeoclimatic pattern shows a strong correlation with isotope event Mi-1b in deep-sea δ18O records, and we propose a tight palaeoclimatic link between the Southern Ocean and the Paratethys/Mediterranean realm as an alternative hypothesis. The interplay of modulations in the long-term (~400kyrs) and short-term (~100kyrs) eccentricity cycles most likely acted as pacemaker of this palaeoclimatic interaction. © 2014. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84909948112&doi=10.1016%2fj.gloplacha.2014.10.011&partnerID=40&md5=5888d346d17b92ee91f1cf95a98b5482
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11299
|
| Appears in Collections: | 全球变化的国际研究计划
|
|
There are no files associated with this item.
|
|
作者单位: | Institute for Earth Sciences, University of Graz, NAWI Graz, Heinrichstraße 26, Graz, Austria
|
| Recommended Citation: | |
Grunert P.,Tzanova A.,Harzhauser M.,et al. Mid-Burdigalian Paratethyan alkenone record reveals link between orbital forcing, Antarctic ice-sheet dynamics and European climate at the verge to Miocene Climate Optimum[J],2014-01-01,123(PA).
|
|
|