NDLI: Identifying the shoreward Gulf Stream front at Cape Hatteras with Coastal Ocean Radar surface currents

Content Provider	IEEE Xplore Digital Library
Author	Muglia, M. Seim, H. Haines, S.
Copyright Year	2012
Description	Author affiliation: Coastal Studies Inst., UNC, Nags Head, NC, USA (Muglia, M.) \|\| Marine Sci. Dept., UNC Chapel Hill, Chapel Hill, NC, USA (Seim, H.; Haines, S.)
Abstract	Surface currents off of Cape Hatteras North Carolina observed with a 5 MHz coastal ocean radar were analyzed to determine the location and variability of the shoreward edge of the Gulf Stream based on the region of maximum horizontal shear. The method for identifying the front is described in detail. A Coastal Ocean Radar (Codar) from Codar Ocean Sensors installed on the beach in Buxton, North Carolina has been operating from the fall of 2003 until the present. The Codar measures the radial component of the surface current and has a range from 100 to 200 km with spatial resolution decreasing as a function of range in 5.85 km range cell increments. Each radial vector produced is an average in an annulus bounded by a 5.85 km range difference and a five-degree bearing difference. The most probable location for the shoreward location of the Gulf Stream front is identified by the maximum horizontal shear in the radial velocities. Frontal locations are estimated by the maximum derivative of the radial speed with respect to bearing at a given range, and by the maximum derivative with respect to range at a given bearing. A third order piecewise spline curve was then fit to the combined set of gradient components. The locations where the Gulf Stream first enters and exits the radar coverage area are apparent in the large radial speeds measured by the radar, however in a region between these two zones the Gulf Stream is perpendicular to the radar, and the radar can not provide a good approximation for stream location based on this method.
Sponsorship	Oceanic Eng. Soc.
Starting Page	1
Ending Page	3
File Size	963008
Page Count	3
File Format	PDF
ISBN	9781467308298
e-ISBN	9781467308311
DOI	10.1109/OCEANS.2012.6405069
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spaceborne radar Ocean temperature Sea measurements Radar measurements Image edge detection
Content Type	Text
Resource Type	Article

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