The behaviour of the Leeuwin Current offshore NW Australia during the last five glacial-interglacial cycles
文献类型：期刊论文
| 作者 | Spooner, MI ; De Deckker, P ; Barrows, TT ; Fifield, LK |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2011-01-01 |
| 卷号 | 75期号:40606页码:119-132 |
| 关键词 | thermocline depth glacial interglacial planktonic foraminifera sea-surface temperature MIS 11 |
| ISSN号 | 0921-8181 |
| 通讯作者 | patrick.dedeckker@anu.edu.au |
| 中文摘要 | The Leeuwin Current is an anomalous eastern boundary current along the western Australian coast. To investigate its behaviour through time, we studied core MD002361 obtained from below the present-day pathway of the Leeuwin Current offshore the NW tip of Western Australia. Planktonic foraminifera assemblages, sea-surface temperature estimates reconstructed from those assemblages, together with the delta O-18 and delta C-13 signals of near-surface dwelling foraminifera (Globigerinoides ruber), were used to reconstruct the vertical structure of the water column for the past 500 ka. Our findings indicate that the Leeuwin Current was present along the western coastline of Australia even during glacial periods. During those times, there was a greater influence of South Indian Subtropical Water (STW) and South Indian Central Water (SICW) due to a 3-4 degrees northward migration of the Indonesian Throughflow Water/South Indian Central Water frontal system. This resulted in an overall 6-9 degrees C decrease in SST, paralleled by a thickening and greater homogeneity of the mixed layer. The increased influence of STW and SICW also suggests that the West Australian Current, which presently sits below the Leeuwin Current, was strengthened during the glacial periods and contributed to a weakening of the Leeuwin Current. Conversely, the Leeuwin Current was 'stronger' during interglacial periods due to a thicker component of Indonesian Throughflow Water sourced from the Indo Pacific Warm Pool. This was particularly the case during marine isotope stage 5.5 (MIS) and the 'super' interglacial MIS 11. (C) 2010 Elsevier B.V. All rights reserved. |
| 学科主题 | Geography, Physical; Geosciences, Multidisciplinary |
| 收录类别 | SCI |
| 原文出处 | ELSEVIER SCIENCE BV |
| 公开日期 | 2011-07-14 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/8379]  |
| 专题 | 南海海洋研究所_海洋科技动态信息-印太暖池系统研究 |
| 推荐引用方式 GB/T 7714 | Spooner, MI,De Deckker, P,Barrows, TT,et al. The behaviour of the Leeuwin Current offshore NW Australia during the last five glacial-interglacial cycles[J]. GLOBAL AND PLANETARY CHANGE,2011,75(40606):119-132. |
| APA | Spooner, MI,De Deckker, P,Barrows, TT,&Fifield, LK.(2011).The behaviour of the Leeuwin Current offshore NW Australia during the last five glacial-interglacial cycles.GLOBAL AND PLANETARY CHANGE,75(40606),119-132. |
| MLA | Spooner, MI,et al."The behaviour of the Leeuwin Current offshore NW Australia during the last five glacial-interglacial cycles".GLOBAL AND PLANETARY CHANGE 75.40606(2011):119-132. |
入库方式： OAI收割
来源：南海海洋研究所
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