Model evidence for interdecadal pathway changes in the subtropics and tropics of the South Pacific Ocean
文献类型：期刊论文
| 作者 | Zhang Ronghua
|
| 刊名 | ADVANCES IN ATMOSPHERIC SCIENCES
 |
| 出版日期 | 2013-01 |
| 卷号 | 30期号:1页码:1-9 |
| 关键词 | water pathway interdecadal changes ocean modeling South Pacific Ocean EL-NINO DECADAL VARIABILITY ANOMALIES SHIFT ENSO CIRCULATION ORIGIN GCM |
| 中文摘要 | Numerical simulations using a version of the GFDL/NOAA Modular Ocean Model (MOM 3) are analyzed to demonstrate interdecadal pathway changes from the subtropics to the tropics in the South Pacific Ocean. After the 1976-77 climate shift, the subtropical gyre of the South Pacific underwent significant changes, characterized by a slowing down in its circulation and a southward displacement of its center by about 5A degrees-10A degrees latitude on the western side. The associated circulation altered its flow path in the northwestern part of the subtropical gyre, changing from a direct pathway connecting the subtropics to the tropics before the shift to a more zonal one after. This effectively prevented some subtropical waters from directly entering into the western equatorial Pacific. Since waters transported onto the equator around the subtropical gyre are saline and warm, such changes in the direct pathway and the associated reduction in equatorward exchange from the subtropics to the tropics affected water mass properties downstream in the western equatorial Pacific, causing persisted freshening and cooling of subsurface water as observed after the late 1970s. Previously, changes in gyre strength and advection of temperature anomalies have been invoked as mechanisms for linking the subtropics and tropics on interdecadal time scales. Here we present an additional hypothesis in which geographic shifts in the gyre structure and location (a pathway change) could play a similar role. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-08-28 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/18187]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang Ronghua. Model evidence for interdecadal pathway changes in the subtropics and tropics of the South Pacific Ocean[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2013,30(1):1-9. |
| APA | Zhang Ronghua.(2013).Model evidence for interdecadal pathway changes in the subtropics and tropics of the South Pacific Ocean.ADVANCES IN ATMOSPHERIC SCIENCES,30(1),1-9. |
| MLA | Zhang Ronghua."Model evidence for interdecadal pathway changes in the subtropics and tropics of the South Pacific Ocean".ADVANCES IN ATMOSPHERIC SCIENCES 30.1(2013):1-9. |
入库方式： OAI收割
来源：海洋研究所
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