K. J. Kim

Publications (5)31.2 Total impact

• Article: Mars' south polar Ar enhancement: a tracer for south polar seasonal meridional mixing.

  A L Sprague, W V Boynton, K E Kerry, D M Janes, D M Hunten, K J Kim, R C Reedy, A E Metzger
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  ABSTRACT: The gamma ray spectrometer on the Mars Odyssey spacecraft measured an enhancement of atmospheric argon over southern high latitudes during autumn followed by dissipation during winter and spring. Argon does not freeze at temperatures normal for southern winter (approximately 145 kelvin) and is left in the atmosphere, enriched relative to carbon dioxide (CO2), as the southern seasonal cap of CO2 frost accumulates. Calculations of seasonal transport of argon into and out of southern high latitudes point to meridional (north-south) mixing throughout southern winter and spring.
  Science 12/2004; 306(5700):1364-7. · 31.20 Impact Factor
• Article: Numerical Simulations of Cosmogenic Neutron Production and Transport in Planetary Surfaces

  K. J. Kim, D. M. Drake, R. C. Reedy
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  ABSTRACT: The code MCNPX was used to numerically simulate and to understand the physical processes in the interactions of cosmic rays with solar-system matter. The energy and depth distributions of neutrons in Mars and an L-chondrite were calculated.
  02/2003; 34:1532.
• Article: Gamma Rays in a Spectrum from the Mars Odyssey Gamma-Ray Spectrometer

  R. C. Reedy, L. G. Evans, J. Brueckner, K. J. Kim, W. V. Boynton
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  ABSTRACT: The gamma-ray spectrum from a long sum over the middle latitudes of Mars measured by the Mars Odyssey Gamma Ray Spectrometer was analyzed. About 250 peaks and features were observed, including many seen during the cruise to Mars. The sources of about 85% of these gamma rays were identified. Most were background lines from the Ge detector or from Ti, Mg, and Zn near the detector.
  02/2003;
• Article: Concentration of H, Si, Cl, K, Fe, and Th in the low- and mid-latitude regions of Mars

  W. V. Boynton, G. J. Taylor, L. G. Evans, R. C. Reedy, R. Starr, D. M. Janes, K. E. Kerry, D. M. Drake, K. J. Kim, R. M. S. Williams, [......], J. Brückner, P. A. J. Englert, O. Gasnault, A. L. Sprague, I. Mitrofanov, S. W. Squyres, J. I. Trombka, L. d'Uston, H. Wänke, D. K. Hamara
  Journal of Geophysical Research-Planets, v.112 (2007).
• Article: Variations in K/Th on Mars

  G. J. Taylor, J. D. Stopar, W. V. Boynton, S. Karunatillake, J. M. Keller, J. Brückner, H. Wänke, G. Dreibus, K. E. Kerry, R. C. Reedy, [......], P. Englert, J. M. Dohm, V. R. Baker, D. Hamara, D. Janes, A. L. Sprague, K. J. Kim, D. M. Drake, S. M. McLennan, B. C. Hahn
  Journal of Geophysical Research-Planets, v.111 (2006).