Opposite Variability of Indonesian Throughflow and South China Sea Throughflow in the Sulawesi Sea.
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| Title: | Opposite Variability of Indonesian Throughflow and South China Sea Throughflow in the Sulawesi Sea. |
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| Authors: | Wei, Jun, Li, M. T., Malanotte-Rizzoli, P., Gordon, A. L., Wang, D. X. |
| Source: | Journal of Physical Oceanography. Oct2016, Vol. 46 Issue 10, p3165-3180. 16p. |
| Subjects: | Mathematical models of oceanography, Ocean currents, Amplitude estimation, Monsoons, Precipitation variability |
| Abstract: | Based on a high-resolution (0.1° × 0.1°) regional ocean model covering the entire northern Pacific, this study investigated the seasonal and interannual variability of the Indonesian Throughflow (ITF) and the South China Sea Throughflow (SCSTF) as well as their interactions in the Sulawesi Sea. The model efficiency in simulating the general circulations of the western Pacific boundary currents and the ITF/SCSTF through the major Indonesian seas/straits was first validated against the International Nusantara Stratification and Transport (INSTANT) data, the OFES reanalysis, and results from previous studies. The model simulations of 2004-12 were then analyzed, corresponding to the period of the INSTANT program. The results showed that, derived from the North Equatorial Current (NEC)-Mindanao Current (MC)-Kuroshio variability, the Luzon-Mindoro-Sibutu flow and the Mindanao-Sulawesi flow demonstrate opposite variability before flowing into the Sulawesi Sea. Although the total transport of the Mindanao-Sulawesi flow is much larger than that of the Luzon-Mindoro-Sibutu flow, their variability amplitudes are comparable but out of phase and therefore counteract each other in the Sulawesi Sea. Budget analysis of the two major inflows revealed that the Luzon-Mindoro-Sibutu flow is enhanced southward during winter months and El Niño years, when more Kuroshio water intrudes into the SCS. This flow brings more buoyant SCS water into the western Sulawesi Sea through the Sibutu Strait, building up a west-to-east pressure head anomaly against the Mindanao-Sulawesi inflow and therefore resulting in a reduced outflow into the Makassar Strait. The situation is reversed in the summer months and La Niña years, and this process is shown to be more crucially important to modulate the Makassar ITF's interannual variability than the Luzon-Karimata flow that is primarily driven by seasonal monsoons. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Physical Oceanography is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Opposite Variability of Indonesian Throughflow and South China Sea Throughflow in the Sulawesi Sea. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wei%2C+Jun%22">Wei, Jun</searchLink><br /><searchLink fieldCode="AR" term="%22Li%2C+M%2E+T%2E%22">Li, M. T.</searchLink><br /><searchLink fieldCode="AR" term="%22Malanotte-Rizzoli%2C+P%2E%22">Malanotte-Rizzoli, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Gordon%2C+A%2E+L%2E%22">Gordon, A. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+D%2E+X%2E%22">Wang, D. X.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Physical+Oceanography%22">Journal of Physical Oceanography</searchLink>. Oct2016, Vol. 46 Issue 10, p3165-3180. 16p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Mathematical+models+of+oceanography%22">Mathematical models of oceanography</searchLink><br /><searchLink fieldCode="DE" term="%22Ocean+currents%22">Ocean currents</searchLink><br /><searchLink fieldCode="DE" term="%22Amplitude+estimation%22">Amplitude estimation</searchLink><br /><searchLink fieldCode="DE" term="%22Monsoons%22">Monsoons</searchLink><br /><searchLink fieldCode="DE" term="%22Precipitation+variability%22">Precipitation variability</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Based on a high-resolution (0.1° × 0.1°) regional ocean model covering the entire northern Pacific, this study investigated the seasonal and interannual variability of the Indonesian Throughflow (ITF) and the South China Sea Throughflow (SCSTF) as well as their interactions in the Sulawesi Sea. The model efficiency in simulating the general circulations of the western Pacific boundary currents and the ITF/SCSTF through the major Indonesian seas/straits was first validated against the International Nusantara Stratification and Transport (INSTANT) data, the OFES reanalysis, and results from previous studies. The model simulations of 2004-12 were then analyzed, corresponding to the period of the INSTANT program. The results showed that, derived from the North Equatorial Current (NEC)-Mindanao Current (MC)-Kuroshio variability, the Luzon-Mindoro-Sibutu flow and the Mindanao-Sulawesi flow demonstrate opposite variability before flowing into the Sulawesi Sea. Although the total transport of the Mindanao-Sulawesi flow is much larger than that of the Luzon-Mindoro-Sibutu flow, their variability amplitudes are comparable but out of phase and therefore counteract each other in the Sulawesi Sea. Budget analysis of the two major inflows revealed that the Luzon-Mindoro-Sibutu flow is enhanced southward during winter months and El Niño years, when more Kuroshio water intrudes into the SCS. This flow brings more buoyant SCS water into the western Sulawesi Sea through the Sibutu Strait, building up a west-to-east pressure head anomaly against the Mindanao-Sulawesi inflow and therefore resulting in a reduced outflow into the Makassar Strait. The situation is reversed in the summer months and La Niña years, and this process is shown to be more crucially important to modulate the Makassar ITF's interannual variability than the Luzon-Karimata flow that is primarily driven by seasonal monsoons. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Physical Oceanography is the property of American Meteorological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1175/JPO-D-16-0132.1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 3165 Subjects: – SubjectFull: Mathematical models of oceanography Type: general – SubjectFull: Ocean currents Type: general – SubjectFull: Amplitude estimation Type: general – SubjectFull: Monsoons Type: general – SubjectFull: Precipitation variability Type: general Titles: – TitleFull: Opposite Variability of Indonesian Throughflow and South China Sea Throughflow in the Sulawesi Sea. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wei, Jun – PersonEntity: Name: NameFull: Li, M. T. – PersonEntity: Name: NameFull: Malanotte-Rizzoli, P. – PersonEntity: Name: NameFull: Gordon, A. L. – PersonEntity: Name: NameFull: Wang, D. X. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2016 Type: published Y: 2016 Identifiers: – Type: issn-print Value: 00223670 Numbering: – Type: volume Value: 46 – Type: issue Value: 10 Titles: – TitleFull: Journal of Physical Oceanography Type: main |
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