GEOSCAN Search Results: Fastlink


TitleThe mean surface circulation of the North Atlantic subpolar gyre: A comparison of estimates derived from new gravity and oceanographic measurements
AuthorHigginson, S; Thompson, K R; Huang, JORCID logo; Véronneau, M; Wright, D G
SourceJournal of Geophysical Research vol. 116, C08016, 2011 p. 1-14,
Alt SeriesEarth Sciences Sector, Contribution Series 20110378
Mediapaper; on-line; digital
File formatpdf
ProvinceEastern offshore region
Areanorthwest Atlantic; Atlantic Ocean; Labrador Sea
Lat/Long WENS-60.0000 -20.0000 68.0000 44.0000
Subjectsmarine geology; geophysics; oceanographic surveys; oceanography; offshore currents; currents; geophysical surveys; gravity; gravity surveys
Illustrationslocation maps
Released2011 08 20
AbstractA new mean sea surface topography (MSST) is used to estimate the surface circulation of the subpolar gyre of the northwest Atlantic. The MSST is produced using a new geoid model derived from a blend of gravity data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission, satellite altimeters, and terrestrial measurements. The MSST is compared with a topography produced by an ocean model which is spectrally nudged to a new Argo period temperature and salinity climatology. The mean surface circulation associated with the geodetic MSST is compared with estimates of the circulation from surface drifters, moorings, and other in situ measurements. The geodetic MSST and circulation estimate are found to be in good agreement with the other estimates, both qualitatively and quantitatively. The topography is found to be an improvement over an earlier geodetic estimate with better resolution of the coastal currents. Deficiencies are identified in the ocean model's estimate of flow over shelf regions.

Date modified: