El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical Pacific
Abstract We examined the covariation of sea surface salinity (SSS) and freshwater flux in the western tropical and northern subtropical Pacific on the El Niño–Southern Oscillation time scale, using a canonical correlation analysis of monthly data between 2001 and 2013. The dominant covariation, i.e....
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| Format: | Article |
| Language: | English |
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Wiley
2017-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2017GL073573 |
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| author | Akira Nagano Takuya Hasegawa Iwao Ueki Kentaro Ando |
| author_facet | Akira Nagano Takuya Hasegawa Iwao Ueki Kentaro Ando |
| author_sort | Akira Nagano |
| collection | DOAJ |
| description | Abstract We examined the covariation of sea surface salinity (SSS) and freshwater flux in the western tropical and northern subtropical Pacific on the El Niño–Southern Oscillation time scale, using a canonical correlation analysis of monthly data between 2001 and 2013. The dominant covariation, i.e., the first canonical mode, has large positive and negative amplitudes in regions east of the Philippines and New Guinea, respectively, and reaches peaks in autumn to winter of El Niño years. The positive SSS anomaly east of the Philippines is advected to the Kuroshio Extension region. We found that the second canonical mode is another coupled variation with localized amplitudes of SSS under the atmospheric convergence zones in winter to spring of La Niña years. However, the negative SSS anomaly is annihilated possibly by the evaporation in the subtropical region. |
| format | Article |
| id | doaj-art-95d7ae9dfb1440ca95faffbf2a81bd2a |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2017-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-95d7ae9dfb1440ca95faffbf2a81bd2a2025-08-20T02:31:40ZengWileyGeophysical Research Letters0094-82761944-80072017-07-0144136895690310.1002/2017GL073573El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical PacificAkira Nagano0Takuya Hasegawa1Iwao Ueki2Kentaro Ando3Research and Development Center for Global Change Japan Agency for Marine‐Earth Science and Technology Yokosuka JapanResearch and Development Center for Global Change Japan Agency for Marine‐Earth Science and Technology Yokosuka JapanResearch and Development Center for Global Change Japan Agency for Marine‐Earth Science and Technology Yokosuka JapanResearch and Development Center for Global Change Japan Agency for Marine‐Earth Science and Technology Yokosuka JapanAbstract We examined the covariation of sea surface salinity (SSS) and freshwater flux in the western tropical and northern subtropical Pacific on the El Niño–Southern Oscillation time scale, using a canonical correlation analysis of monthly data between 2001 and 2013. The dominant covariation, i.e., the first canonical mode, has large positive and negative amplitudes in regions east of the Philippines and New Guinea, respectively, and reaches peaks in autumn to winter of El Niño years. The positive SSS anomaly east of the Philippines is advected to the Kuroshio Extension region. We found that the second canonical mode is another coupled variation with localized amplitudes of SSS under the atmospheric convergence zones in winter to spring of La Niña years. However, the negative SSS anomaly is annihilated possibly by the evaporation in the subtropical region.https://doi.org/10.1002/2017GL073573western PacificPhilippine SeaENSOsalinityfreshwater flux |
| spellingShingle | Akira Nagano Takuya Hasegawa Iwao Ueki Kentaro Ando El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical Pacific Geophysical Research Letters western Pacific Philippine Sea ENSO salinity freshwater flux |
| title | El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical Pacific |
| title_full | El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical Pacific |
| title_fullStr | El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical Pacific |
| title_full_unstemmed | El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical Pacific |
| title_short | El Niño–Southern Oscillation‐time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical Pacific |
| title_sort | el nino southern oscillation time scale covariation of sea surface salinity and freshwater flux in the western tropical and northern subtropical pacific |
| topic | western Pacific Philippine Sea ENSO salinity freshwater flux |
| url | https://doi.org/10.1002/2017GL073573 |
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