Publication:
Poleward propagating subinertial alongshore surface currents off the U.S. West Coast

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Authors
Kim, Sung Yong
Cornuelle, Bruce D.
Terrill, Eric J.
Jones, Burt
Washburn, Libe
Moline, Mark A.
Paduan, Jeffrey D.
Garfield, Newell
Largier, John L.
Crawford, Greg
Subjects
Advisors
Date of Issue
2013-12
Date
Publisher
American Geophysical Union
Language
Abstract
The network comprising 61 high-frequency radar systems along the U.S. West Coast (USWC) provides a unique, high resolution, and broad scale view of ocean surface circulation. Subinertial alongshore surface currents show poleward propagating signals with phase speeds of O(10) and O(100–300) km d 1 that are consistent with historical in situ observations off the USWC and that can be possibly interpreted as coastally trapped waves (CTWs). The propagating signals in the slow mode are partly observed in southern California, which may result from scattering and reflection of higher-mode CTWs due to curvature of shoreline and bathymetry near Point Conception, California. On the other hand, considering the order of the phase speed in the slow mode, the poleward propagating signals may be attributed to alongshore advection or pressure-driven flows. A statistical regression of coastal winds at National Data Buoy Center buoys on the observed surface currents partitions locally and remotely wind-forced components, isolates footprints of the equatorward propagating storm events in winter off the USWC, and shows the poleward propagating signals year round.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1002/jgrc.20400
Series/Report No
Department
Oceanography
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
National Research Foundation (NRF)
Ministry of Education
Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
Ministry of Trade, Industry and Energy
Republic of Korea
Funder
no. 2013R1A1A2057849
no. 20114030200040
Format
16 p.
Citation
Kim, Sung Yong, et al. "Poleward propagating subinertial alongshore surface currents off the US West Coast." Journal of Geophysical Research: Oceans 118.12 (2013): 6791-6806.
Distribution Statement
Rights
This 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 States.
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