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
  ... more

• 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
  ... more