DOI: 10.1016/j.palaeo.2015.11.002
论文题名: Response of Mediterranean circulation to Miocene shoaling and closure of the Indian Gateway: A model study
作者: de la Vara A. ; Meijer P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 442 起始页码: 96
结束页码: 109
语种: 英语
英文关键词: Marine gateways
; Mediterranean Sea
; Middle Miocene
; Numerical modeling
; Ocean circulation
; Tethys Seaway
英文摘要: In this regional ocean model study, we explore the effect of the Early to Middle Miocene shoaling and closure of the Indian Gateway on Mediterranean circulation and its exchange with the adjacent oceans. For this we use the regional ocean circulation model “sbPOM” and a collection of bathymetries created from an early Burdigalian paleogeographical base map in which the depth of the Indian Gateway is set to 1000, 450, 200, or 0 m. A significant improvement of this work relative to previous regional modeling studies is that we also consider the possibility that the Indian and Atlantic gateways accommodated net westward flow—as reported in many global climate model studies. To this end, we superimpose net westward flows of different magnitudes to the gateways. Because the Early–Middle Miocene climate is uncertain, we start with atmospheric conditions based on the present and subsequently explore alternative atmospheric forcings. Similarly, we first assume a relatively shallow Atlantic Gateway of 500 m depth and then study the effect of a connection of 900 m. The extensive set of experiments performed allows us to gain detailed physics-based insight into the effect of the above-mentioned factors on the thermohaline circulation and water properties, and provides a solid background to interpret observational evidence. By comparing our modeled exchange patterns to data we are able to propose the flow configurations consistent with observations—some of them not considered until now—during the different stages of closure and infer the conditions (climate, presence/absence of net flow, Atlantic Gateway depth) under which these patterns arise. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68615
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Budapestlaan 4, Utrecht, Netherlands
Recommended Citation:
de la Vara A.,Meijer P.. Response of Mediterranean circulation to Miocene shoaling and closure of the Indian Gateway: A model study[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,442