Comparison of near-surface flows assessed by ring-diagram and f-mode time-distance analyses

Bradley Hindman, Laurent Gizon, Deborah Haber, Thomas Duvall, Juri Toomre

Research output: Contribution to journalConference article

Abstract

The near-surface shear layer exhibits a rich medley of flows that are now being measured by time-distance and ring analysis techniques. We present comparisons of the flows obtained with the two techniques using SOI-MDI Dynamics Program data from the years 1998 and 1999. The time-distance analyses utilize f-mode data without depth inversion. The flows deduced with the two methods are remarkably similar, with common inflow and outflow sites as well as agreement in the general flow directions. The direct correspondence of features in the flows is realized in both quiet and active regions.

Original languageEnglish (US)
Pages (from-to)299-302
Number of pages4
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number517
StatePublished - Feb 1 2003
EventPIC7 - Geneva, Switzerland
Duration: Oct 30 2003Nov 3 2003

Fingerprint

diagram
diagrams
rings
SOI (semiconductors)
shear layers
inflow
outflow
comparison
inversions

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

Cite this

Comparison of near-surface flows assessed by ring-diagram and f-mode time-distance analyses. / Hindman, Bradley; Gizon, Laurent; Haber, Deborah; Duvall, Thomas; Toomre, Juri.

In: European Space Agency, (Special Publication) ESA SP, No. 517, 01.02.2003, p. 299-302.

Research output: Contribution to journalConference article

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AB - The near-surface shear layer exhibits a rich medley of flows that are now being measured by time-distance and ring analysis techniques. We present comparisons of the flows obtained with the two techniques using SOI-MDI Dynamics Program data from the years 1998 and 1999. The time-distance analyses utilize f-mode data without depth inversion. The flows deduced with the two methods are remarkably similar, with common inflow and outflow sites as well as agreement in the general flow directions. The direct correspondence of features in the flows is realized in both quiet and active regions.

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