The Indonesian Throughflow response to Indo‐Pacific climate variability

Sprintall, Janet; Révelard, Adèle

doi:10.1002/2013jc009533

Cited by 130 publications

(153 citation statements)

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“…The INSTANT estimates also reveal inter-annual fluctuation; see Table 1 of Gordon et al (2010). Nevertheless, Sprintall and Revelard (2014) argue that the 3-year time series alone is not sufficient to comprehensively resolve the inter-annual signal. In the INDO12 simulation, Fig.…”

Section: Volume Transport (Itf and Scstf)mentioning

confidence: 99%

“…In this case, the ITF transport is reduced with the weakest transport in Ombaï and the negative IOD seems to prevail. In a recent paper, Sprintall and Revelard (2014) argue that Indian Ocean dynamics likely win out over the Pacific Ocean dynamics during concurrent ENSO and IOD events. Indeed, the ITF transport variability would be linked both to spatial patterns of SLA and to zonal wind stress anomalies.…”

Section: Volume Transport (Itf and Scstf)mentioning

confidence: 99%

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Evaluation of an operational ocean model configuration at 1/12° spatial resolution for the Indonesian seas (NEMO2.3/INDO12) – Part 1: Ocean physics

et al. 2016

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Abstract. INDO12 is a 1/12 • regional version of the NEMO physical ocean model covering the whole Indonesian EEZ (Exclusive Economic Zone). It has been developed and is now running every week in the framework of the IN-DESO (Infrastructure Development of Space Oceanography) project implemented by the Indonesian Ministry of Marine Affairs and Fisheries.The initial hydrographic conditions as well as openboundary conditions are derived from the operational global ocean forecasting system at 1/4 • operated by Mercator Océan. Atmospheric forcing fields (3-hourly ECMWF (European Centre for Medium-Range Weather Forecast) analyses) are used to force the regional model. INDO12 is also forced by tidal currents and elevations, and by the inverse barometer effect. The turbulent mixing induced by internal tides is taken into account through a specific parameterisation. In this study we evaluate the model skill through comparisons with various data sets including outputs of the parent model, climatologies, in situ temperature and salinity measurements, and satellite data. The biogeochemical model results assessment is presented in a companion paper (Gutknecht et al., 2015).The simulated and altimeter-derived Eddy Kinetic Energy fields display similar patterns and confirm that tides are a dominant forcing in the area. The volume transport of the Indonesian throughflow (ITF) is in good agreement with the INSTANT estimates while the transport through Luzon Strait is, on average, westward but probably too weak. Compared to satellite data, surface salinity and temperature fields display marked biases in the South China Sea. Significant water mass transformation occurs along the main routes of the ITF and compares well with observations. Vertical mixing is able to modify the South and North Pacific subtropical water-salinity maximum as seen in T -S diagrams.In spite of a few weaknesses, INDO12 proves to be able to provide a very realistic simulation of the ocean circulation and water mass transformation through the Indonesian Archipelago. Work is ongoing to reduce or eliminate the remaining problems in the second INDO12 version.

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Section: Volume Transport (Itf and Scstf)mentioning

confidence: 99%

Section: Volume Transport (Itf and Scstf)mentioning

confidence: 99%

Evaluation of an operational ocean model configuration at 1/12° spatial resolution for the Indonesian seas (NEMO2.3/INDO12) – Part 1: Ocean physics

et al. 2016

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“…2). It was suggested that the Indian Ocean Dipole may have strong impact on the ITF transport through the Lombok and Ombai Straits (Potemra and Schneider 2007;Sprintall and Révelard 2014).…”

Section: The Itf Transport and Its Interannual And Decadal Variationsmentioning

confidence: 99%

The Indonesian throughflow, its variability and centennial change

et al. 2018

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The Indonesian Throughflow (ITF) is an important component of the upper cell of the global overturning circulation that provides a low-latitude pathway for warm, fresh waters from the Pacific to enter the Indian Ocean. Variability and changes of the ITF have significant impacts on Indo-Pacific oceanography and global climate. In this paper, the observed features of the ITF and its interannual to decadal variability are reviewed, and processes that influence the centennial change of the ITF under the influence of the global warming are discussed. The ITF flows across a region that comprises the intersection of two ocean waveguides-those of the equatorial Pacific and equatorial Indian Ocean. The ITF geostrophic transport is stronger during La Niñas and weaker during El Niños due to the influences through the Pacific waveguide. The Indian Ocean wind variability associated with the Indian Ocean Dipole (IOD) in many years offsets the Pacific ENSO influences on the ITF geostrophic transport during the developing and mature phases of El Niño and La Niña through the Indian Ocean waveguide, due to the co-varying IOD variability with ENSO. Decadal and multi-decadal changes of the geostrophic ITF transport have been revealed: there was a weakening change from the mid-1970s climate regime shift followed by a strengthening trend of about 1Sv every 10 year during 1984-2013. These decadal changes are mostly due to the ITF responses to decadal variations of the trade winds in the Pacific. Thus, Godfrey's Island Rule, as well as other ITF proxies, appears to be able to quantify decadal variations of the ITF. Climate models project a weakening trend of the ITF under the global warming. Both climate models and downscaled ocean model show that this ITF weakening is not directly associated with the changes of the trade winds in the Pacific into the future, and the reduction of deep upwelling in the Pacific basin is mainly responsible for the ITF weakening. There is a need to amend the Island Rule to take into account the contributions from the overturning circulation which the current ITF proxies fail to capture. The implication of a weakened ITF on the Indo-Pacific Ocean circulation still needs to be assessed.

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“…The currents and wave processes in the Makassar Strait and Spermonde Archipelago are strongly modulated by marked reversals in monsoon winds toward the southeast during the boreal winter (Dec-Feb) and northwest in summer (Jun-Aug). The Makassar Strait also acts as the major conduit of the Indonesian Throughflow (ITF), the arterial pathway connecting the Pacific and Indian oceans, and which plays a critical role in the coupled ocean and climate system (Gordon et al, 1999(Gordon et al, , 2003Gordon, 2005;Sprintall and Revelard, 2014). The ITF dynamics in the Makassar Strait are modulated by the monsoonal wind patterns.…”

Section: Oceanographic Regimementioning

confidence: 99%

Reef Island Evolution and Dynamics: Insights from the Indian and Pacific Oceans and Perspectives for the Spermonde Archipelago

Kench

Mann

2017

Front. Mar. Sci.

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Along southwestern Sulawesi, Indonesia, the Spermonde Archipelago comprises some 120 islands of variable size and degree of anthropogenic modification. Comparable to adjacent areas in Southeast Asia, the Spermonde Archipelago is characterized by the congregation of a naturally high marine biodiversity and, at the same time, a high population density influencing the surrounding environmental conditions. As a consequence, during the last decades, research projects that have been carried out in the Spermonde mainly focused on social, ecological, political and economic interactions. However, geological and geomorphological aspects of the coral reef islands are less well understood and there have been few studies undertaken since the pioneering work of Umbgrove, Kuenen, and Verstappen in the Indonesian archipelago in the early to mid-twentieth century. Here we review the existing studies, with a focus on the Spermonde Archipelago, and reconcile them with more recent works on reef island evolution and dynamics from the Indian and Pacific Oceans. This synthesis shows that reef islands in the Spermonde Archipelago are well suited for geomorphological investigations, and provides perspectives for future reef island research in that area that will have global interest. We identify four research priorities: (1) To identify the timing and chronology of island formation; (2) Improved understanding of carbonate budgets and sediment generation that contribute to island building; (3) Document morphological changes in reef islands at seasonal to decadal timescales, and; (4) Quantify the process regime that drives sediment transport and island change with particular focus on the role of different monsoon seasons.

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The Indonesian Throughflow response to Indo‐Pacific climate variability

Cited by 130 publications

References 61 publications

Evaluation of an operational ocean model configuration at 1/12° spatial resolution for the Indonesian seas (NEMO2.3/INDO12) – Part 1: Ocean physics

Evaluation of an operational ocean model configuration at 1/12° spatial resolution for the Indonesian seas (NEMO2.3/INDO12) – Part 1: Ocean physics

The Indonesian throughflow, its variability and centennial change

Reef Island Evolution and Dynamics: Insights from the Indian and Pacific Oceans and Perspectives for the Spermonde Archipelago

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