Volume Transport Variability in the Western Equatorial Pacific and its Relations to Halmahera Throughflow

Wattimena, Marlin Chrisye; Atmadipoera, Agus S.; Purba, Mulia; Nurjaya, I Wayan; Syamsudin, Fadli

doi:10.47836/pjst.29.2.26

Cited by 4 publications

(2 citation statements)

References 49 publications

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“…Kondisi ini disebabkan oleh karena pengaruh massa air NPSW dan NPIW yang masuk karena dorongan Arus Mindanao (Mindanao Current, MC). Sebaliknya massa air Pasifik Selatan masuk karena dorongan arus Pantai Papua (New Guinea Coastal Current, NGCC) dan arus bawah pantai Papua (New Guinea Coastal Under Current NGCUC) (Kashino et al, 1999;Wattimena et al, 2018Wattimena et al, , 2021. Massa air SPSLTW setelah memasuki perairan bagian timur Indonesia melalui Laut Halmahera, mengalami penurunan nilai salinitas maksimum akibat vertikal percampuran (Ilahude dan Gordon, 1996).…”

Section: Karakteristik Massa Airunclassified

Karakteristik Fisik Perairan Selatan Kabupaten Kepulauan Tanimbar pada Musim Transisi II

Wattimena¹,

Ratuluhain²,

Tubalawony³

2023

jlp

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This study investigated the characteristics of stratification and vertical stability of southern waters of Tanimbar Islands Regency. CTD Data from World Ocean Database 2018 especially November 1995 to represent second transitional season were utilized in this study. The CTD data were processed using Ocean Data View. This study showed that vertically the temperature of the surface layer ranged between 29 to 30 oC and the thickness of surface mixed layer was found to be 44 m. The thermocline layer has temperature ranging between 12 to 28 oC and a maximum depth of 306 m. Below thermocline layer temperature reduced to reach less than 7 oC (depth > 500 m). On the halocline layer, a high saline water was found between 66 - 94 m depth and was located on the southern part between Barbar Islands and Tanimbar Islands. Water mass was found to be unstable in the mixing layer.

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Section: Karakteristik Massa Airunclassified

Karakteristik Fisik Perairan Selatan Kabupaten Kepulauan Tanimbar pada Musim Transisi II

Wattimena¹,

Ratuluhain²,

Tubalawony³

2023

jlp

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“…Observational studies find the MC is strongest from March to May and weakest from September to November, linked to the strength of the North Equatorial Current and position of its bifurcation (Qiu and Lukas, 1996;Ren et al, 2018). There is a lack of observed annual range transport estimates, but previous model estimates of the annual range are 9-10 Sv (Qiu and Lukas, 1996;Wattimena et al, 2021). The annual range in GODAS (11 Sv) and C-GLORS (8.2 Sv) are broadly consistent with past model estimates, while the annual range is much weaker in GECCO3 (2.4 Sv), SODA3 (4.1 Sv) and ORAS5 (5.2 Sv; Figure 3A).…”

Section: Mindanao Currentmentioning

confidence: 99%

Pacific Equatorial Undercurrent: Mean state, sources, and future changes across models

Stellema¹,

Gupta²,

Taschetto³

et al. 2022

Front. Clim.

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The Equatorial Undercurrent (EUC) stretches across the Pacific, transporting cool waters rich in oxygen and nutrients eastward to one of the most productive regions in the ocean. As an intricate part of the global climate system, EUC dynamics are essential to understanding future climate change but are poorly represented in global coupled climate models. This study examines EUC representation and future changes in the latest generations of the Coupled Model Intercomparison Project (CMIP6 and CMIP5) and an eddy-permitting ocean model. We also examine historical and projected changes in EUC source waters, including the Mindanao Current (MC), New Guinea Coastal Undercurrent (NGCU), and interior thermocline convergence. The circulation features in the models are broadly consistent with observations and ocean reanalyses, but improvements from CMIP5 to CMIP6 are limited. In the future projections, the EUC is enhanced in the western Pacific, with less prominent changes in CMIP6, but more so in the eddy-permitting model. The western Pacific EUC enhancement is likely associated with a wind-driven redirection of waters south of the equator, in which the NGCU boundary flow increases while the interior thermocline convergence decreases. This is superimposed on an overall weakening of the North Pacific subtropical overturning cell, including the MC, interior thermocline convergence, and Ekman divergence. As EUC heat and nutrient composition is linked to its sources, these projected changes have implications for the EUC's role in air–sea feedbacks, nutrient replenishment, and oxygen minimum zone ventilation in the eastern Pacific.

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Interannual deep-water renewal in the tropical fjord of Kao Bay of Halmahera Island, eastern Indonesia, linked to ocean dynamics in western equatorial Pacific

Wattimena,

Salamena

2025

Regional Studies in Marine Science

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Volume Transport Variability in the Western Equatorial Pacific and its Relations to Halmahera Throughflow

Cited by 4 publications

References 49 publications

Karakteristik Fisik Perairan Selatan Kabupaten Kepulauan Tanimbar pada Musim Transisi II

Karakteristik Fisik Perairan Selatan Kabupaten Kepulauan Tanimbar pada Musim Transisi II

Pacific Equatorial Undercurrent: Mean state, sources, and future changes across models

Interannual deep-water renewal in the tropical fjord of Kao Bay of Halmahera Island, eastern Indonesia, linked to ocean dynamics in western equatorial Pacific

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