Probing solar dynamics in the upper convection zone by time-distance helioseismology

Research output: Contribution to journalConference articlepeer-review


By use of time-distance helioseismology, we derived solar rotational rates, meridional flow velocities, as well as synoptic flow maps to a depth of around 12 Mm (Zhao & Kosovichev, 2004). This paper is the beginning of an attempt to derive large scale flow fields and make synoptic flow maps in the deeper solar interior, up to the bottom of the solar convection zone. So far, we have made time-distance measurements and inversions to a depth of around 50 Mm, one fourth of the solar convection zone. In this paper, we present some initial results, including rotational rates, meridional flows, synoptic flow maps for selected Carrington rotations, and flow fields around large active region AR9393 at various depths.

Original languageEnglish (US)
Pages (from-to)672-675
Number of pages4
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number559
StatePublished - 2004
Externally publishedYes
EventSOHO 14/GONG 2004 Workshop - Helio- and Asteroseismology: Towards a Golden Future - New Haven, CT, United States
Duration: Jul 12 2004Jul 16 2004

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science


  • Active region
  • Helioseismology
  • Meridional flows
  • Solar rotation


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