DOI: 10.1016/j.gloplacha.2017.01.008
论文题名: Sea surface temperatures and environmental conditions during the “warm Pliocene” interval (~ 4.1–3.2 Ma) in the Eastern Mediterranean (Cyprus)
作者: Athanasiou M. ; Bouloubassi I. ; Gogou A. ; Klein V. ; Dimiza M.D. ; Parinos C. ; Skampa E. ; Triantaphyllou M.V.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2017
卷: 150 起始页码: 46
结束页码: 57
语种: 英语
英文关键词: Alkenones
; Calcareous nannofossils
; Cooling events
; Eastern Mediterranean
; Paleotemperatures
; Pliocene
; Sapropels
Scopus关键词: Atmospheric temperature
; Glacial geology
; Submarine geophysics
; Surface properties
; Surface waters
; Water
; Alkenones
; Calcareous nannofossils
; Eastern Mediterranean
; Paleotemperatures
; Pliocene
; Sapropels
; Oceanography
; Pseudoemiliania lacunosa
; Reticulofenestra
英文摘要: Organic geochemical (alkenones) and micropaleontological (nannofossil) data from the Pissouri South section (PPS) in the island of Cyprus provided a detailed description of the paleoclimatic (sea surface temperature-SST) and paleoenvironmental conditions during the “warm Pliocene” (c. 4.1–3.25 Ma) in the Eastern Mediterranean. We found that the suite of sapropel events recorded in the studied interval took place under conditions of increased SST, enhanced water column stratification and development of a productive deep chlorophyll maximum (DCM), as witnessed by the dominance of Florisphaera profunda species. Such conditions are similar to those prevailing during Quaternary sapropel formation, triggered by freshwater discharges from the N. African margin due to insolation-driven intensification of the African monsoon. The absence of F. profunda in Pliocene sapropels from central Mediterranean records highlights the sensitive response of the eastern basin to freshwater perturbations. Comparisons between alkenone and calcareous nannofossil assemblage patterns infer Pseudoemiliania lacunosa as the main alkenone producer in sapropel layers; yet Reticulofenestra spp. contribution cannot be ruled out. The first Pliocene alkenone-SST record in the E. Mediterranean presented here documents the “warm Pliocene” period (~ 4.1–3.25 Ma) characterized by mean SST of c. 26 °C. Distinct SST minima at ~ 3.9 Ma, 3.58 Ma and between 3.34 and 3.31 Ma, correspond to the MIS Gi16, MIS MG12 and MIS M2 global cooling episodes, before the onset of the Northern Hemisphere glaciation. Our findings imply that the peak of the MIS M2 cooling in the Eastern Mediterranean may be up to ~ 40 kyrs older than the age attributed before to benthic stable oxygen isotopes records of this event. © 2017 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85011588651&doi=10.1016%2fj.gloplacha.2017.01.008&partnerID=40&md5=5ff5ec957aced0e29c907303c2033bc6
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11748
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
There are no files associated with this item.
作者单位: Faculty of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimioupolis, Athens, Greece
Recommended Citation:
Athanasiou M.,Bouloubassi I.,Gogou A.,et al. Sea surface temperatures and environmental conditions during the “warm Pliocene” interval (~ 4.1–3.2 Ma) in the Eastern Mediterranean (Cyprus)[J]. Global and Planetary Change,2017-01-01,150.