Dynamics of Interannual Eddy Kinetic Energy Variability in the Sulawesi Sea Revealed by OFAM3

Hao, Zhanjiu; Xu, Zhenhua; Feng, Ming; Zhang, Peiwen; Yin, Baoshu

doi:10.1029/2022jc018815

Cited by 7 publications

(5 citation statements)

References 65 publications

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“…And finally, returning to the central topic of this study, the effects of mesoscale eddy activities on the residence time and pathway of the ITF, we recognize that the limited length of the particle tracking experiments does not provide information on how the effects may change on an interannual time scale. Hao et al (2022) found that the interannual variability of eddy kinetic energy in the Sulawesi Sea is primarily modulated by transport from the MC intrusion that controls the intensity of barotropic instability within the Sulawesi Sea. The MC intrusion, in turn, is influenced by the paths of the MC and NGCC (and its undercurrent) as well as eddy activities in the western Pacific.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…Hao et al. (2022) found that the interannual variability of eddy kinetic energy in the Sulawesi Sea is primarily modulated by transport from the MC intrusion that controls the intensity of barotropic instability within the Sulawesi Sea. The MC intrusion, in turn, is influenced by the paths of the MC and NGCC (and its undercurrent) as well as eddy activities in the western Pacific.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…Both observations and modeling studies have shown high mesoscale eddy activities in the Indonesian Seas, in particular along the western route, for example, at the Pacific entrance to the Sulawesi Sea (Chen et al., 2018; Hao et al., 2022; Kashino et al., 1999), within the Sulawesi Sea (Hao et al., 2022; Masumoto et al., 2001; C. Yang et al., 2020), and in the Flores Sea (Kartadikaria et al., 2012). The dynamic causes of these eddies have been proposed to be Rossby wave resonance at the Pacific entrance to the Sulawesi Sea (Qiu et al., 1999) and barotropic instability within the Sulawesi Sea (C. Yang et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Effects of High‐Frequency Flow Variability on the Pathways of the Indonesian Throughflow

et al. 2023

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Previous studies have shown the presence of strong mesoscale eddy activities in the Indonesian Seas and their influence on the transport and water mass properties of the Indonesian Throughflow (ITF), a mean flow from the Pacific Ocean to the Indian Ocean through the Indonesian Archipelago. This study explores the effects of these eddy activities, or high‐frequency flow variability (HFFV), on residence time and pathway of the ITF by conducting Lagrangian particle tracking experiments using a velocity field from an eddy‐resolving ocean general circulation model. Particles are released at key locations in the western and eastern routes of the ITF and tracked both backward and forward in time. To assess the effects of flow variability that has a time scale longer than a day but shorter than a month, the definition of HFFV in this study, we conduct parallel experiments using daily and monthly averaged velocity fields. Particle trajectories reveal the contrasting circulation characteristics of the Sulawesi and Banda Seas. HFFV in the Sulawesi Sea (in the western route) is high, causing water to circulate longer over a broader area. The longer residence time in the Sulawesi Sea helps the upwelling of the inflowing Pacific waters, especially the intermediate water masses, to rise above 300 m at the Makassar Strait, and also has the potential to allow mixing processes to modify the water mass properties of the ITF. In contrast, HFFV is much lower in the Banda Sea and has minimal effects on the ITF.

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Section: Summary and Discussionmentioning

confidence: 99%

Section: Summary and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Effects of High‐Frequency Flow Variability on the Pathways of the Indonesian Throughflow

et al. 2023

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“…These currents have the potential to transport microplastics from one area to another, potentially leading to their dispersion over considerable distances within the sea (Iskandar et al, 2021). Furthermore, the circular currents in the western part of the Sulawesi Sea are believed to be associated with the activity of eddies in the region (Masumoto et al, 2001;Hao et al, 2022). Eddies may potentially contribute to the transport of materials, including microplastics, within the water column and thus could redistribute the microplastics around Miangas and Talaud Islands.…”

Section: Discussionmentioning

confidence: 99%

Microplastic occurrence in sub-surface waters of the Indonesian archipelago

Cordova,

Iskandar,

Surinati

et al. 2024

Front. Mar. Sci.

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The issue of plastic pollution in the marine environment is a matter of great concern. Our research presents pioneering findings on sub-surface microplastics in the Indonesian archipelagic waters. Data on microplastic presence in sub-surface water in the Indonesian Archipelagic Water is crucial for expanding our understanding of microplastic distribution from the surface to the bottom layers of the ocean, a research area that has been relatively overlooked. We discovered microplastic particles at 5 m depth below the surface through simultaneous pump method. The highest concentration of microplastics was discovered in Ambon, followed by North Java and North Sulawesi. In contrast, the lowest abundance of microplastics was detected in the Maluku Sea. These findings are consistent with prior studies establishing a relationship between human activity–as indicated by population density–and microplastic pollution. However, our results indicate that levels of microplastics in Ambon were significantly higher than those found in other sampled areas, particularly compared to North Java, which boasts the highest population density in Indonesia. This disparity is likely due to a faster seawater flushing rate and shorter water residence time in North Java relative to Ambon. The origins and pathways through which these microplastics are introduced into Indonesian archipelagic waters remain uncertain. Based on particle composition (52.73% fibers and 51.38% size <500 µm), it appears that they may result from either larger plastic items being broken down during transportation over long distances by prevailing currents from input from coastal areas or as a byproduct of local activities. Additional research is necessary to gain a comprehensive understanding of microplastic in water columns. This includes investigating the fate of microplastics and examining their impact on marine organisms within this treasured ecosystem. Moreover, it is important to develop methods for mapping the worldwide distribution of microplastics.

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Satellite observations of coastal upwelling in the northern Arafura Sea

Yu,

Hao,

et al. 2024

J. Ocean. Limnol.

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Dynamics of Interannual Eddy Kinetic Energy Variability in the Sulawesi Sea Revealed by OFAM3

Abstract: Mesoscale eddies play a vital role in oceanic mass and heat transport and bridge the energy transfer between large-scale and mesoscale (submesoscale) dynamics (e.g.,

Cited by 7 publications

References 65 publications

Effects of High‐Frequency Flow Variability on the Pathways of the Indonesian Throughflow

Effects of High‐Frequency Flow Variability on the Pathways of the Indonesian Throughflow

Microplastic occurrence in sub-surface waters of the Indonesian archipelago

Satellite observations of coastal upwelling in the northern Arafura Sea

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