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dc.contributor.authorLeslie, William R.  Concept link
dc.contributor.authorKarnauskas, Kristopher B.  Concept link
dc.date.accessioned2014-09-05T13:29:52Z
dc.date.available2015-03-01T10:05:57Z
dc.date.issued2014-09
dc.identifier.citationJournal of Atmospheric and Oceanic Technology 21 (2014): 2015–2025en_US
dc.identifier.urihttps://hdl.handle.net/1912/6835
dc.descriptionAuthor Posting. © American Meteorological Society, 2014. This article is posted here by permission of American Meteorological Society for personal use, not for redistribution. The definitive version was published in Journal of Atmospheric and Oceanic Technology 21 (2014): 2015–2025, doi:10.1175/JTECH-D-13-00262.1.en_US
dc.description.abstractThe NOAA Tropical Atmosphere Ocean (TAO) moored array has, for three decades, been a valuable resource for monitoring and forecasting El Niño–Southern Oscillation and understanding physical oceanographic as well as coupled processes in the tropical Pacific influencing global climate. Acoustic Doppler current profiler (ADCP) measurements by TAO moorings provide benchmarks for evaluating numerical simulations of subsurface circulation including the Equatorial Undercurrent (EUC). Meanwhile, the Sea Education Association (SEA) has been collecting data during repeat cruises to the central equatorial Pacific Ocean (160°–126°W) throughout the past decade that provide useful cross validation and quantitative insight into the potential for stationary observing platforms such as TAO to incur sampling biases related to the strength of the EUC. This paper describes some essential sampling characteristics of the SEA dataset, compares SEA and TAO velocity measurements in the vicinity of the EUC, shares new insight into EUC characteristics and behavior only observable in repeat cross-equatorial sections, and estimates the sampling bias incurred by equatorial TAO moorings in their estimates of the velocity and transport of the EUC. The SEA high-resolution ADCP dataset compares well with concurrent TAO measurements (RMSE = 0.05 m s−1; R2 = 0.98), suggests that the EUC core meanders sinusoidally about the equator between ±0.4° latitude, and reveals a mean sampling bias of equatorial measurements (e.g., TAO) of the EUC’s zonal velocity of −0.14 ± 0.03 m s−1 as well as a ~10% underestimation of EUC volume transport. A bias-corrected monthly record and climatology of EUC strength at 140°W for 1990–2010 is presented.en_US
dc.description.sponsorshipThe authors thank the NSF Physical Oceanography program (OCE-1233282) and the WHOI Academic Programs Office for funding.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.hasparthttps://hdl.handle.net/1912/6746
dc.relation.requireshttps://hdl.handle.net/1912/7105
dc.relation.urihttps://doi.org/10.1175/JTECH-D-13-00262.1
dc.subjectPacific Oceanen_US
dc.subjectTropicsen_US
dc.subjectCurrentsen_US
dc.subjectOcean dynamicsen_US
dc.subjectBuoy observationsen_US
dc.subjectSamplingen_US
dc.titleThe Equatorial Undercurrent and TAO sampling bias from a decade at SEAen_US
dc.typeArticleen_US
dc.description.embargo2015-03-01en_US
dc.identifier.doi10.1175/JTECH-D-13-00262.1


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