A High Resolution Satellite-only GRACE-based Mean Dynamic Topography of the South Atlantic Ocean

Marcio L. Vianna, Viviane V. Menezes, D. Chambers

Research output: Contribution to journalArticlepeer-review

Abstract

A new filtering method based on Singular Spectrum Analysis has been devised to extract high resolution (0.25° × 0.25° grid) satellite-only Mean Dynamic Ocean Topography(MDT) constructed by differencing of the GGM02 GRACE Gravity Model from the GSFCMSS00 Mean Sea Surface. This data-adaptive interpolation-type filter is adequate for the finite domain MDT processing since it minimizes smoothing and does not lose boundary points. It is applied to the computation of two new MDTs and MDT-derived mean geostrophic circulation maps of the South Atlantic region from 15°N to 50°S. Advantages of these new maps are clarified when contrasted with the Rio-2005, Chambers-Zlotnicki-2004 and ADCP cruise transect data.

Original languageAmerican English
JournalGeophysical Research Letters
Volume34
DOIs
StatePublished - Dec 22 2007
Externally publishedYes

Keywords

  • MDT‐GRACE
  • South Atlantic
  • SSA filter

Disciplines

  • Life Sciences
  • Marine Biology

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