Publications

  1. Lehmacher, G. A., Wu, H., Kudeki, E., Reyes, P. M., Hysell, D. L., & Milla, M. ( 2020). Height variation of gaps in 150‐km echoes and Whole Atmosphere Community Climate Model electron densities suggest link to upper hybrid resonance. Journal of Geophysical Research: SpacePhysics, 125. https://doi.org/10.1029/2019JA027204.
  2. Reyes, P. M., Kudeki, E., Lehmacher, G. A., Chau, J. L., & Milla, M. A. (2020).VIPIR and 50 MHz radar studies of gravity wave signatures in 150‐kmechoes observed at Jicamarca. Journal of Geophysical Research: Space Physics,125, e2019JA027535. https://doi.org/10.1029/2019JA027535.
  3. Lehmacher, Gerald A, Miguel F Larsen, Michael J Taylor, Jonathan B Snively, Aroh Barjatya, Franz-Josef Lübken, Jorge L Chau (2019). VortEx: a new rocket experiment to study mesoscale dynamics at the turbopause, Proc. 24th ESA Symposium on European Rocket and Balloon Programmes and Related Research, Essen, Germany, 17-20 June 2019, ESA SP-742, ISBN 978-92-9221-307-7.
  4. Lee, Kiwook, Kudeki, E., Reyes, P. M., Lehmacher, G. A., and Milla, M (2019) Mesospheric wind estimation with the Jicamarca MST radar using spectral mainlobe identification, Radio Science, doi.org/10.1029/2019RS006892.
  5. Pedatella, N. M., Chau, J. L., Vierinen, J., Qian, L., Reyes, P. M., Kudeki, E., Lehmacher, G. A. and Oppenheim, M. (2019). Solar flare effects on 150‐km echoes observed over Jicamarca: WACCM‐X simulations. Geophysical Research Letters, 46, doi.org/10.1029/2019GL084790.
  6. Lehmacher, G. A., Kudeki, E., Reyes, P. M., Lee, K., Heale, C. J., and Snively, J. B.. (2019), Gravity wave ducting observed in the mesosphere over Jicamarca, Peru. J. Geophys. Res. Atmos., 124, doi.org/10.1029/2019JD030264.
  7. Triplett, C. C., Li, J., Collins, R. L., Lehmacher, G. A., Barjatya, A., Fritts, D. C., et al. (2018). Observations of reduced turbulence and wave activity in the Arctic middle atmosphere following the January 2015 sudden stratospheric warming. Journal of Geophysical Research: Atmospheres, 123, 13,259–13,276, doi.org/10.1029/2018JD028788.
  8. Lehmacher, Gerald A., Miguel F. Larsen, Richard L. Collins, Aroh Barjatya, and Boris Strelnikov (2018), On the short-term variability of turbulence and temperature in the winter mesosphere, Ann. Geophys., 36, 1099–1116, 2018. doi.org/10.5194/angeo-36-1099-2018.
  9. Collins, R., C. Triplett, A. Barjatya, G. Lehmacher and D. Fritts (2015), Using lidar and rockets to explore turbulence in the atmosphere, SPIE Newsroom, http://spie.org/x113533.xml.
  10. Lehmacher, G. A., M. F. Larsen, and C. L. Croskey (2015), Observation of electron biteout regions below sporadic E layers at polar latitudes, Ann. Geophys., 33, 371–380, doi:10.5194/angeo-33-371-2015.
  11. Lehmacher, G. A., T. M. Gaulden, M. F. Larsen, J. E. Craven, Multiple neutral density measurements in the lower thermosphere with cold-cathode ionization gauges, J. Atmos. Solar-Terr. Phys., 92 (2013) 137–144.
  12. Lehmacher, G. A., Scott, T. D., Larsen, M. F., Bilén, S. G., Croskey, C. L., Mitchell, J. D., Rapp, M., Lübken, F.-J., and Collins, R. L.: The Turbopause experiment: atmospheric stability and turbulent structure spanning the turbopause altitude, Ann. Geophys., 29, 2327-2339, doi:10.5194/angeo-29-2327-2011, 2011. 
  13. Collins, R. L., Lehmacher, G. A., Larsen, M. F., and Mizutani, K.: Estimates of vertical eddy diffusivity in the upper mesosphere in the presence of a mesospheric inversion layer, Ann. Geophys., 29, 2019-2029, doi:10.5194/angeo-29-2019-2011, 2011. 
  14. Kouahla, M. N., G. Moreels, M. Faivre, J. Clairemidi, J.W. Meriwether, G.A. Lehmacher, E. Vidal, O. Veliz, 3D Imaging of the OH Mesospheric Emissive Layer, J. Adv. Space Res., 45(2), 260, 2010.
  15. Lehmacher, G. A., E. Kudeki, A. Akgiray, L. Guo, P. Reyes, and J. Chau, Radar cross sections for mesospheric echoes at Jicamarca, Ann. Geophys., 27, 2675-2684, 2009.
  16. Guo, L., and G. Lehmacher, First meteor radar observations of tidal oscillations over Jicamarca (11.95° S, 76.87° W), Ann. Geophys., 27, 2575-2583, 2009
  17. Moreels, G., Clairemidi, J., Faivre, M., Mougin-Sisini, D., Kouahla, M. N., Meriwether, J.W., Lehmacher, G.A., Vidal, E., Veliz, O., Stereoscopic imaging of the hydroxyl layer at low latitudes, Planet. Space Sci., 56(11), 1467-1479, 2008.
  18. Moreels, G., Clairemidi, J., Faivre, M., Pautet, D.,  Rubio da Costa, F., Rousselot P., Meriwether, J.W., Lehmacher, G.A., Vidal E., Chau J.L., Monnet, G., Near-infrared sky background fluctuations at mid- and low latitudes. Experimental Astronomy, doi: 10.1007/s10686-008-9089-6, 2007.
  19. Guo, L., G. A. Lehmacher, E. Kudeki, A. Akgiray, R. Sheth, J. Chau Turbulent Energy Dissipation Rates and Eddy Diffusivities in the Tropical Mesosphere Obtained from Jicamarca Radar Data, J. Adv. Space Res., 40 (2007), 744-750, doi:/10.1016/j.asr.2007.05.068, 2007.
  20. Lehmacher, G. A., L. Guo, E. Kudeki, J. Chau, High-resolution observations of mesospheric layers with the Jicamarca VHF radar, J. Adv. Space Res., 40 (2007), 734-743, doi:/10.1016/j.asr.2007.05.059, 2007.
  21. Lehmacher, G. A., C. L. Croskey, J. D. Mitchell, M. Friedrich, F.-J. Lübken, M. Rapp, E. Kudeki, and D. C. Fritts, Intense turbulence observed above a mesospheric temperature inversion at equatorial latitude, Geophys. Res. Lett., 33, L08808, doi: 10.1029/2005GL024345, 2006.
  22. Friedrich, M., K. M. Torkar, G. A. Lehmacher, C. L. Croskey, J. D. Mitchell, E. Kudeki, M. Milla, Rocket and Incoherent Scatter Radar Common-Volume Electron Measurements of the Equatorial Lower Ionosphere, Geophys. Res. Lett., 33, L08807, doi:10.1029/2005GL024622, 2006.
  23. Kudeki, E., M. Milla, M. Friedrich, and G. Lehmacher, ALTAIR incoherent scatter observations of the equatorial daytime ionosphere, Geophys. Res. Lett., 33, L08108, doi:10.1029/2005GL025180, 2006..
  24. Sheth, R., E. Kudeki, G. Lehmacher, M. Sarango, R. Woodman, L. Guo, P. Reyes, A high-resolution study of mesospheric fine structure with the Jicamarca MST radar, Ann. Geophys., 24, 1281-1293, 2006.
  25. Lehmacher, G., First Evaluation of new undergraduate space research projects, Adv. Space Res., 34, 2110-2115, 2004. doi:10.1016/j/asr.2003.03.070
  26. Lehmacher, G., and E. Kudeki, Variability of equatorial mesospheric echoes, Adv. Space Res., 32(5), 747-752, 2003.
  27. Oberheide, J., G. A. Lehmacher, D. Offermann. K. U. Grossmann, A. H. Manson, C. E. Meek, F. J. Schmidlin, W. Singer, and R. A. Vincent, Geostrophic wind fields in the stratosphere and mesosphere from satellite data, J. Geophys.Res., 107, 8175, doi: 10.1029/JD000655, 2002.
  28. Riese, M., V. Küll, X. Tie, G. Brasseur, D. Offermann, G. Lehmacher, and A. Franzen, Modeling of nitrogen species measured by CRISTA, Geophys. Res. Lett., 27, 2221-2224, 2000.
  29. Lehmacher, G. A., J. Oberheide, F. J. Schmidlin and D. Offermann, Zero miss time and zero miss distance experiments for validation of CRISTA 2 temperatures, 32nd COSPAR General Assembly, Nagoya, Japan, 12-19 July 1998. Adv. Space Res., 26(6), 965-969, 2000.
  30. Von Zahn, U., D. M. Hunten, and G. Lehmacher, Helium in Jupiter's atmosphere: results from the Galileo probe Helium Interferometer Experiment, J. Geophys. Res., 103, 22,815-22,829, 1998.
  31. Goldberg, R. A., G. A. Lehmacher, F. J. Schmidlin, D. C. Fritts, J. D. Mitchell, C. L. Croskey, M. Friedrich, and W. E. Swartz, Equatorial dynamics observed by rocket, radar, and satellite during the CADRE/MALTED campaign. 1. Programmatics and small-scale fluctuations, J. Geophys. Res., 102, 26179, 1997.
  32. Fritts, D. C., J. F. Garten, D. M. Riggin, R. A. Goldberg, G. A. Lehmacher, F. J. Schmidlin, S. McCarthy, E. Kudeki, C. D. Fawcett, M. H. Hitchman, R. S. Lieberman, I. M. Reid, and R. A. Vincent, Equatorial dynamics observed by rocket, radar, and satellite during the CADRE/MALTED campaign. 2. Mean wave structures, coherence, and variability, J. Geophys. Res., 102, 26,191-26,216, 1997.
  33. Lehmacher, G., R. A. Goldberg, F. J. Schmidlin, C. L. Croskey, J. D. Mitchell, and W. E. Swartz, Electron density fluctuations in the equatorial mesosphere: Neutral turbulence or plasma fluctuations?, Geophys. Res. Lett., 24, 1715-1718, 1997.
  34. Seiff, A, D. B. Kirk, T. Knight, J. D. Mihalov, R. C. Blanchard, R. E. Young, G. Schubert, U. von Zahn, G. Lehmacher, F. S. Milos, and J. Wang, Structure of the atmosphere of Jupiter: Galileo probe measurements, Science, 272, 844-845, 1996.
  35. Lehmacher, G. and F.-J. Lübken, Simultaneous observation of convective adjustment and turbulence generation by mesospheric gravity wave generation, Geophys. Res. Lett., 22, 2477-2480, 1995.
  36. Hillert, W., F.-J. Lübken, and G. Lehmacher, TOTAL: a rocket-borne instrument for high resolution measurements of neutral air turbulence during DYANA, J. Atmos. Terr. Phys., 56, 1835-1852, 1994.
  37. Lübken, F.-J., W. Hillert, G. Lehmacher, U. von Zahn, T. A. Blix, E. V. Thrane, H.-U. Widdel, G. Kokin, A. K. Knyazev, and A. Hauchecorne, Morphology and sources of turbulence in the mesosphere, J. Atmos. Terr. Phys., 56, 1809, 1994
  38. Lübken, F.-J, W. Hillert, G. Lehmacher, U. von Zahn, M. Bittner, D. Offermann, F. J. Schmidlin, A. Hauchecorne, M. Mourier, and P. Czechowsky, Intercomparison of density and temperature profiles obtained by lidar, ionization gauges, falling spheres, datasondes and radiosondes during the DYANA campaign, J. Atmos. Terr. Phys., 56, 1969-1984, 1994
  39. Thrane, E. V, T. A. Blix, U.-P. Hoppe, F.-J. Lübken, W. Hillert, G. Lehmacher, and D. C. Fritts, A study of small-scale waves and turbulence in the mesosphere using simultaneous in situ observations of neutral gas and plasma fluctuations, J. Atmos. Terr. Phys., 56, 1797, 1994
  40. Lübken, F.-J., W. Hillert, G. Lehmacher, and U. von Zahn, Experiments revealing small impact of turbulence on the energy budget of the mesosphere and lower thermosphere, J. Geophys. Res., 98, 20,369-20,384, 1993.
  41. Lübken, F.-J., G. Lehmacher, T. Blix, U.-P. Hoppe, E. Thrane, J. Cho, and W. Swartz, First in situ observations of neutral and plasma density fluctuations within a PMSE layer, Geophys. Res. Lett., 20, 2311-2314, 1993.