selected publications

• conference proceeding

  • The Virtual Solar Observatory-A Resource for International Heliophysics Research.  Earth Moon and Planets. 315-330. 2007
  • Transient oscillations near the solar tachocline.  Esa Sp. 409-412. 2002
  • Daily variations of large-scale subsurface flows and global synoptic flow maps from dense-pack ring-diagram analyses.  Esa Sp. 209-212. 2000
  • Development of multiple cells in meridional flows and evolution of mean zonal flows from ring-diagram analyses.  Esa Sp. 213-218. 2000
  • Spatially-resolved analysis of the upper convection zone.  Symposium- International Astronomical Union. 183-185. 2000
  • Subphotospheric convective flows determined by ring-diagram analyses of SOI-MDI observations.  Esa Sp. 791-796. 1998
  • Solar oscillation ring diagrams: Benefits of great-circle remapping.  272-275. 1994

• journal article

  • A Full-Sun Magnetic Index from Helioseismology Inferences.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 503-514. 2014
  • Latest Results Found with Ring-Diagram Analysis.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 57-69. 2013
  • Subsurface Meridional Flow from HMI Using the Ring-Diagram Pipeline.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 85-106. 2013
  • Workshop Report: A New Synoptic Solar Observing Network.  Space Weather. 392-393. 2013
  • THE HIGH-LATITUDE BRANCH OF THE SOLAR TORSIONAL OSCILLATION IN THE RISING PHASE OF CYCLE 24.  Letters of the Astrophysical Journal. 2013
  • Subsurface Vorticity of Flaring versus Flare-Quiet Active Regions.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 389-406. 2011
  • On the success rate of the farside seismic imaging of active regions.  Space Weather. 2010
  • EVIDENCE THAT TEMPORAL CHANGES IN SOLAR SUBSURFACE HELICITY PRECEDE ACTIVE REGION FLARING.  Letters of the Astrophysical Journal. L121-L125. 2010
  • Calibration of seismic signatures of active regions on the far side of the sun.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 1382-1389. 2007
  • Divergence and vorticity of solar subsurface flows derived from ring-diagram analysis of MDI and GONG data.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 571-584. 2007
  • Temporal variations in solar rotation at the bottom of the convection zone: The current status.  Advances in Space Research. 915-918. 2007
  • Solar convection zone dynamics: How sensitive are inversions to subtle dynamo features?.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 1155-1168. 2006
  • Flares, magnetic fields, and subsurface vorticity: A survey of GONG and MDI data.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 1543-1553. 2006
  • Large-scale zonal flows near the solar surface - A comparison of results from local and global helioseismology with direct Doppler measurements.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 1-15. 2006
  • Meridional circulation variability from large-aperture ring-diagram analysis of Global Oscillation Network Group and Michelson Doppler Imager data.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 576-583. 2006
  • Solar site survey for the advanced technology solar telescope. I. Analysis of the seeing data.  Publications of the Astronomical Society of the Pacific. 1296-1305. 2005
  • Activity-related changes in local solar acoustic mode parameters from Michelson Doppler Imager and Global Oscillations Network Group.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 562-579. 2004
  • Evolving submerged meridional circulation cells within the upper convection zone revealed by ring-diagram analysis.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 855-864. 2002
  • Interior solar-cycle changes detected by helioseismology.  Symposium- International Astronomical Union. 40-42. 2001
  • Subsurface flows with advancing solar cycle using dense-pack ring-diagram analyses.  Symposium- International Astronomical Union. 211-214. 2001
  • Deeply penetrating banded zonal flows in the solar convection zone.  The Astrophysical Journal: an international review of astronomy and astronomical physics. L163-L166. 2000
  • Dynamic variations at the base of the solar convection zone.  Science. 2456-2460. 2000
  • Solar shear flows deduced from helioseismic dense-pack samplings of ring diagrams.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 335-350. 2000
  • Differential rotation and dynamics of the solar interior.  Science. 1300-1305. 1996
  • GONG observations of solar surface flows.  Science. 1306-1309. 1996
  • The Global Oscillation Network Group (GONG) project.  Science. 1284-1286. 1996
  • The seismic structure of the sun.  Science. 1296-1300. 1996
  • The solar acoustic spectrum and eigenmode parameters.  Science. 1292-1295. 1996
  • THE GLOBAL OSCILLATION NETWORK GROUP SITE SURVEY .1. DATA-COLLECTION AND ANALYSIS-METHODS.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 321-349. 1994
  • THE GLOBAL OSCILLATION NETWORK GROUP SITE SURVEY .2. RESULTS.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 351-379. 1994
  • SIMULATION OF EFFECTS OF ATMOSPHERIC SEEING ON THE OBSERVATION OF HIGH-DEGREE SOLAR OSCILLATIONS.  The Astrophysical Journal: an international review of astronomy and astronomical physics. 237-246. 1991
  • RESPONSE OF THE SOLAR 5-MINUTE OSCILLATIONS TO A MAJOR FLARE.  Symposium- International Astronomical Union. 59-62. 1988
  • SOLAR EQUATORIAL ROTATION RATE INFERRED FROM INVERSION OF FREQUENCY SPLITTING OF HIGH-DEGREE MODES.  Symposium- International Astronomical Union. 45-48. 1988
  • ON THE EXPECTED PERFORMANCE OF A SOLAR OSCILLATION NETWORK.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 201-&. 1985
  • VARIABILITY IN THE POWER SPECTRUM OF SOLAR 5-MINUTE OSCILLATIONS.  Solar Physics: a journal for solar and solar-stellar research and the study of solar terrestrial physics. 411-425. 1983
  • STEADY FLOWS IN THE SOLAR TRANSITION REGION OBSERVED WITH SMM.  The Astrophysical Journal: an international review of astronomy and astronomical physics. L115-L118. 1981