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dc.contributor.authorChu, Peter C.
dc.contributor.authorKuo, Y-Heng
dc.date.accessioned2015-06-30T17:47:20Z
dc.date.available2015-06-30T17:47:20Z
dc.date.issued2010-04
dc.identifier.citationDeep-Sea Research II, Volume 57, (2010), pp. 1809–1819en_US
dc.identifier.urihttp://hdl.handle.net/10945/45463
dc.descriptionThe article of record as published may be located at http://dx.doi.org/10.1016/j.dsr2.2010.04.007en_US
dc.description.abstractTen years (1998–2007) of sea-level anomalies (SLA) from multiple satellite altimeters and chlorophyll-a concentration from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) were used to detect eddy pumping/advection of nutrients by the action of propagating Rossby waves in the Kuroshio Extension (KE) region near 35oN after the seasonal SeaWiFS chlorophyll-a (Chl-a) concentrations cycles and annual changes of altimeter SLA were eliminated. Spatial structure of Chl-a anomalies to the seasonal cycle is examined in relation to altimeter eddy structure. Eddy propagation speeds and scales by the Rossby waves are also identified. Chl-a structure is evident during the spring bloom period with a scale around 460 km. Cold-core (cyclonic) rings correspond to areas of high Chl-a concentrations. Warm-core (anticyclonic) rings relate to areas of low Chl-a concentration. Chl-a anomalies and SLA have an overall modest negative correlation coefficient of r¼"0.45, which may imply the co-existence of both eddy pumping and eddy advection mechanisms in the KE region. Swirl currents between eddies redistribute surface chlorophyll concentrations and can spatially bias maximum and minimum concentration levels off eddy center. The correlation coefficient has seasonal fluctuations. In the western KE region, it varies from high negative correlation (r¼"0.70) in April and September (eddy pumping dominant) to low negative correlation (r¼"0.33) in February and March (eddy advection dominant). In the eastern KE region, it varies from high negative correlation (r¼"0.67) in February to low negative correlation (r¼"0.42) in December. It is noted that the characteristic wavelengths of the SLA and Chl-a features, and the seasonality of the correlation between these two variables have not been previously documented.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United Statesen_US
dc.titleNutrient pumping/advection by propagating Rossby Waves in the Kuroshio Extensionen_US
dc.typeArticleen_US
dc.contributor.departmentOceanographyen_US
dc.subject.authorRossby wave propagationen_US
dc.subject.authorKuroshio extentionen_US
dc.subject.authorNutrient pumping/advectionen_US
dc.subject.authorMeso-scale eddiesen_US
dc.subject.authorSea level anomalyen_US
dc.subject.authorChlorophyll-a concentrationen_US


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