NDLI: Seasonal variability of the North Equatorial Current transport in the western Pacific Ocean

Content Provider	Springer Nature Link
Author	Yan, Qingxun Hu, Dunxin Zhai, Fangguo
Copyright Year	2014
Abstract	Seasonal variability of the North Equatorial Current (NEC) transport in the western Pacific Ocean is investigated with ECMWF Ocean Analysis/Reanalysis System 3 (ORA-S3). The result shows that NEC transport (NT) across different longitudes in the research area shows a similar double-peak structure, with two maxima (in summer and winter), and two minima (in spring and autumn). This kind of structure can also be found in NEC geostrophic transport (NGT), but in a different magnitude and phase. These differences are attributable to Ekman transport induced by the local meridional wind and transport caused by nonzero velocity at the reference level, which is assumed to be zero in the NGT calculation. In the present work, a linear vorticity equation governing a 1.5-layer reduced gravity model is adopted to examine the dynamics of the seasonal variability of NGT. It is found that the annual cycle of NGT is mainly controlled by Ekman pumping induced by local wind, and westward-propagating Rossby waves induced by remote wind. Further research demonstrates that the maximum in winter and minimum in spring are mostly attributed to wind east of the dateline, whilst the maximum in summer and minimum in autumn are largely attributed to that west of the dateline.
Starting Page	223
Ending Page	237
Page Count	15
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	32
Issue Number	1
e-ISSN	19935005
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-11-16
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	North Equatorial Current (NEC) transport seasonal variability linear vorticity equation Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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