Four current meter models compared in strong currents in Drake Passage

TitleFour current meter models compared in strong currents in Drake Passage
Publication TypeJournal Article
Year of Publication2013
AuthorsWatts D.R, Kennelly M.A, Donohue K.A, Tracey K.L, Chereskin TK, Weller RA, Victoria I.
JournalJournal of Atmospheric and Oceanic Technology
Date Published2013/10
Type of ArticleArticle
ISBN Number0739-0572
Accession NumberWOS:000330455100018

Seven current meters representing four models on a stiffly buoyed mooring were placed for an 11-month deployment to intercompare their velocity measurements: two vector-measuring current meters (VMCMs), two Aanderaa recording current meter (RCM) us, two Aanderaa SEAGUARDs, and a Nortek Aquadopp. The current meters were placed 6-m apart from each other at about 4000-m depth in an area of Drake Passage expected to have strong currents, nearly independent of depth near the bottom. Two high-current events occurred in bursts of semidiurnal pulses lasting several days, one with peak speeds up to 67 cm s(-1) and the other above 35 cm s(-1). The current-speed measurements all agreed within 7% of the median value when vector averaged over simultaneous time intervals. The VMCMs, chosen as the reference measurements, were found to measure the median of the mean-current magnitudes. The RCM11 and SEAGUARD current speeds agreed within 2% of the median at higher speeds (35-67 cm s(-1)), whereas in lower speed ranges (0-35 cm s(-1)) the vector-averaged speeds for the RCM11 and SEAGUARD were 4%-5% lower and 3%-5% higher than the median, respectively. The shorter-record Aquadopp current speeds were about 6% higher than the VMCMs over the range (0-40 cm s(-1)) encountered.

Short TitleJ. Atmos. Ocean. Technol.
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