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Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer
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| Zeitschriftentitel: | Journal of Physical Oceanography |
|---|---|
| Personen und Körperschaften: | , , |
| In: | Journal of Physical Oceanography, 43, 2013, 8, S. 1551-1565 |
| Format: | E-Article |
| Sprache: | Unbestimmt |
| veröffentlicht: |
American Meteorological Society
|
| Schlagwörter: |
| author_facet |
Qu, Tangdong Gao, Shan Fine, Rana A. Qu, Tangdong Gao, Shan Fine, Rana A. |
|---|---|
| author |
Qu, Tangdong Gao, Shan Fine, Rana A. |
| spellingShingle |
Qu, Tangdong Gao, Shan Fine, Rana A. Journal of Physical Oceanography Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer Oceanography |
| author_sort |
qu, tangdong |
| spelling |
Qu, Tangdong Gao, Shan Fine, Rana A. 0022-3670 1520-0485 American Meteorological Society Oceanography http://dx.doi.org/10.1175/jpo-d-12-0180.1 <jats:title>Abstract</jats:title><jats:p>This study investigates the subduction of South Pacific Tropical Water (SPTW) and its equatorward pathways using a simulated passive tracer of the consortium Estimating the Circulation & Climate of the Ocean (ECCO). The results show that approximately 5.8 Sv (1 Sv ≡ 10<jats:sup>6</jats:sup> m<jats:sup>3</jats:sup> s<jats:sup>−1</jats:sup>) of the SPTW is formed in the subtropical South Pacific Ocean within the density range between 24.0 and 25.0 kg m<jats:sup>−3</jats:sup>, of which about 87% is due to vertical pumping and 13% is due to lateral induction, comparing reasonably well with estimates from climatological data. Once subducted, most SPTW spreads in the subtropical South Pacific. Because of the presence of mixing, some portion of the water is transformed, and its tracer-weighted density steadily increases from an initial value of 24.4 to nearly 25.0 kg m<jats:sup>−3</jats:sup> after 13 years of integration. Approximately 42% of the water makes its way into the equatorial Pacific, either through the western boundary or interior pathway. The two equatorward pathways are essentially of equal importance. A large (~70%) portion of the SPTW entering the equatorial region resurfaces in the central equatorial Pacific. The potential impacts of the resurfacing SPTW on the equatorial thermocline and surface stratification are discussed.</jats:p> Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer Journal of Physical Oceanography |
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American Meteorological Society, 2013 |
| imprint_str_mv |
American Meteorological Society, 2013 |
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0022-3670 1520-0485 |
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0022-3670 1520-0485 |
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2013 |
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American Meteorological Society |
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ai |
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Journal of Physical Oceanography |
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49 |
| title |
Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_unstemmed |
Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_full |
Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_fullStr |
Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_full_unstemmed |
Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_short |
Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_sort |
subduction of south pacific tropical water and its equatorward pathways as shown by a simulated passive tracer |
| topic |
Oceanography |
| url |
http://dx.doi.org/10.1175/jpo-d-12-0180.1 |
| publishDate |
2013 |
| physical |
1551-1565 |
| description |
<jats:title>Abstract</jats:title><jats:p>This study investigates the subduction of South Pacific Tropical Water (SPTW) and its equatorward pathways using a simulated passive tracer of the consortium Estimating the Circulation & Climate of the Ocean (ECCO). The results show that approximately 5.8 Sv (1 Sv ≡ 10<jats:sup>6</jats:sup> m<jats:sup>3</jats:sup> s<jats:sup>−1</jats:sup>) of the SPTW is formed in the subtropical South Pacific Ocean within the density range between 24.0 and 25.0 kg m<jats:sup>−3</jats:sup>, of which about 87% is due to vertical pumping and 13% is due to lateral induction, comparing reasonably well with estimates from climatological data. Once subducted, most SPTW spreads in the subtropical South Pacific. Because of the presence of mixing, some portion of the water is transformed, and its tracer-weighted density steadily increases from an initial value of 24.4 to nearly 25.0 kg m<jats:sup>−3</jats:sup> after 13 years of integration. Approximately 42% of the water makes its way into the equatorial Pacific, either through the western boundary or interior pathway. The two equatorward pathways are essentially of equal importance. A large (~70%) portion of the SPTW entering the equatorial region resurfaces in the central equatorial Pacific. The potential impacts of the resurfacing SPTW on the equatorial thermocline and surface stratification are discussed.</jats:p> |
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| author | Qu, Tangdong, Gao, Shan, Fine, Rana A. |
| author_facet | Qu, Tangdong, Gao, Shan, Fine, Rana A., Qu, Tangdong, Gao, Shan, Fine, Rana A. |
| author_sort | qu, tangdong |
| container_issue | 8 |
| container_start_page | 1551 |
| container_title | Journal of Physical Oceanography |
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| description | <jats:title>Abstract</jats:title><jats:p>This study investigates the subduction of South Pacific Tropical Water (SPTW) and its equatorward pathways using a simulated passive tracer of the consortium Estimating the Circulation & Climate of the Ocean (ECCO). The results show that approximately 5.8 Sv (1 Sv ≡ 10<jats:sup>6</jats:sup> m<jats:sup>3</jats:sup> s<jats:sup>−1</jats:sup>) of the SPTW is formed in the subtropical South Pacific Ocean within the density range between 24.0 and 25.0 kg m<jats:sup>−3</jats:sup>, of which about 87% is due to vertical pumping and 13% is due to lateral induction, comparing reasonably well with estimates from climatological data. Once subducted, most SPTW spreads in the subtropical South Pacific. Because of the presence of mixing, some portion of the water is transformed, and its tracer-weighted density steadily increases from an initial value of 24.4 to nearly 25.0 kg m<jats:sup>−3</jats:sup> after 13 years of integration. Approximately 42% of the water makes its way into the equatorial Pacific, either through the western boundary or interior pathway. The two equatorward pathways are essentially of equal importance. A large (~70%) portion of the SPTW entering the equatorial region resurfaces in the central equatorial Pacific. The potential impacts of the resurfacing SPTW on the equatorial thermocline and surface stratification are discussed.</jats:p> |
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| physical | 1551-1565 |
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| spelling | Qu, Tangdong Gao, Shan Fine, Rana A. 0022-3670 1520-0485 American Meteorological Society Oceanography http://dx.doi.org/10.1175/jpo-d-12-0180.1 <jats:title>Abstract</jats:title><jats:p>This study investigates the subduction of South Pacific Tropical Water (SPTW) and its equatorward pathways using a simulated passive tracer of the consortium Estimating the Circulation & Climate of the Ocean (ECCO). The results show that approximately 5.8 Sv (1 Sv ≡ 10<jats:sup>6</jats:sup> m<jats:sup>3</jats:sup> s<jats:sup>−1</jats:sup>) of the SPTW is formed in the subtropical South Pacific Ocean within the density range between 24.0 and 25.0 kg m<jats:sup>−3</jats:sup>, of which about 87% is due to vertical pumping and 13% is due to lateral induction, comparing reasonably well with estimates from climatological data. Once subducted, most SPTW spreads in the subtropical South Pacific. Because of the presence of mixing, some portion of the water is transformed, and its tracer-weighted density steadily increases from an initial value of 24.4 to nearly 25.0 kg m<jats:sup>−3</jats:sup> after 13 years of integration. Approximately 42% of the water makes its way into the equatorial Pacific, either through the western boundary or interior pathway. The two equatorward pathways are essentially of equal importance. A large (~70%) portion of the SPTW entering the equatorial region resurfaces in the central equatorial Pacific. The potential impacts of the resurfacing SPTW on the equatorial thermocline and surface stratification are discussed.</jats:p> Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer Journal of Physical Oceanography |
| spellingShingle | Qu, Tangdong, Gao, Shan, Fine, Rana A., Journal of Physical Oceanography, Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer, Oceanography |
| title | Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_full | Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_fullStr | Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_full_unstemmed | Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_short | Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| title_sort | subduction of south pacific tropical water and its equatorward pathways as shown by a simulated passive tracer |
| title_unstemmed | Subduction of South Pacific Tropical Water and Its Equatorward Pathways as Shown by a Simulated Passive Tracer |
| topic | Oceanography |
| url | http://dx.doi.org/10.1175/jpo-d-12-0180.1 |