Interannual variability of the Indonesian Throughflow transport: A revisit based on 30 year expendable bathythermograph data
Interannual variability of the Indonesian Throughflow transport: A revisit based on 30 year expendable bathythermograph data
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印度尼西亚通流运输的年际变化：基于 30 年一次性海底温度计数据的重新审视
DOI：
10.1002/2015jc011351
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发表时间：
2015-12
影响因子：
3.6
通讯作者：
Wijffels Susan
中科院分区：
文献类型：
--
作者：
Liu Qin-Yan;Feng Ming;Wang Dongxiao;Wijffels Susan
基于1984 - 2013年在澳大利亚西部弗里曼特尔和印度尼西亚巽他海峡之间30 a重复部署的一次性深海温度计（XBT）资料，研究了印度尼西亚赤道气流（ITF）地转输送的年际变化及其与厄尔尼诺南方涛动（ENSO）和印度洋偶极子（IOD）的关系。IOD引起的Kelvin波沿着印度尼西亚苏门答腊-爪哇海岸传播，ENSO引起的Kelvin波沿着澳大利亚西北海岸传播，两者都影响ITF输送的年际变化。ITF的地转输送在La Nina阶段较强，在El Nino阶段较弱，Nino3.4指数领先ITF 7个月。在厄尔尼诺和拉尼娜的发展阶段和成熟阶段，印度洋风场的变化在一定程度上抵消了太平洋ENSO对ITF地转输送的影响，这是由于印度洋风场的变化与ENSO的协变。ITF地转输送在研究期间经历了每10年约1 Sv的加强趋势，这主要是由于在气候变化间歇期太平洋信风的加强。当使用XBT数据估计ITF的地转输送时，需要考虑温度-盐度关系的年代际变化。本文受版权保护。All rights reserved.
Based on 30-year repeated expendable bathythermograph (XBT) deployments between Fremantle, Western Australia and the Sunda Strait, Indonesia from 1984 to 2013, interannual variability of geostrophic transport of the Indonesian Throughflow (ITF) and its relationships with El Nino Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD) are investigated. The IOD induced coastal Kelvin waves propagate along the Sumatra-Java coast of Indonesia, and ENSO induced coastal Kelvin waves propagate along the northwest coast of Australia, both influencing interannual variations of the ITF transport. The ITF geostrophic transport is stronger during La Nina phase and weaker during El Nino phase, with the Nino3.4 index leading the ITF variability by 7 months. The Indian Ocean wind variability associated with the IOD to a certain extent offset the Pacific ENSO influences on the ITF geostrophic transport during the developing and mature phases of El Nino and La Nina, due to the co-varying IOD variability with ENSO. The ITF geostrophic transport experiences a strengthening trend of about 1 Sv every 10 years over the study period, which is mostly due to a response to the strengthening of the trade winds in the Pacific during the climate change hiatus period. Decadal variations of the temperature-salinity relationships need to be considered when estimating the geostrophic transport of the ITF using XBT data. This article is protected by copyright. All rights reserved.
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